/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/max-array.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-bc79526 [2022-01-18 06:53:44,145 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-18 06:53:44,146 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-18 06:53:44,193 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-01-18 06:53:44,227 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 [2022-01-18 06:53:44,239 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-18 06:53:44,239 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-18 06:53:44,240 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-01-18 06:53:44,240 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-01-18 06:53:44,240 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-01-18 06:53:44,240 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-01-18 06:53:44,241 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-01-18 06:53:44,241 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-01-18 06:53:44,241 INFO L138 SettingsManager]: * Use SBE=true [2022-01-18 06:53:44,241 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-18 06:53:44,241 INFO L138 SettingsManager]: * sizeof long=4 [2022-01-18 06:53:44,241 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-18 06:53:44,241 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-01-18 06:53:44,241 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-18 06:53:44,241 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-18 06:53:44,241 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-18 06:53:44,241 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-18 06:53:44,241 INFO L138 SettingsManager]: * sizeof long double=12 [2022-01-18 06:53:44,241 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-18 06:53:44,242 INFO L138 SettingsManager]: * Use constant arrays=true [2022-01-18 06:53:44,242 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-18 06:53:44,242 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-18 06:53:44,242 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-18 06:53:44,242 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-01-18 06:53:44,242 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-18 06:53:44,242 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-18 06:53:44,242 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-18 06:53:44,242 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-01-18 06:53:44,242 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-01-18 06:53:44,242 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-01-18 06:53:44,242 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-01-18 06:53:44,243 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-01-18 06:53:44,243 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-01-18 06:53:44,243 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2022-01-18 06:53:44,410 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-18 06:53:44,429 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-18 06:53:44,431 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-18 06:53:44,432 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2022-01-18 06:53:44,433 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2022-01-18 06:53:44,433 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/max-array.wvr.bpl [2022-01-18 06:53:44,434 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/max-array.wvr.bpl' [2022-01-18 06:53:44,451 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-18 06:53:44,451 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-01-18 06:53:44,452 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-01-18 06:53:44,457 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-01-18 06:53:44,458 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-01-18 06:53:44,467 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "max-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 06:53:44" (1/1) ... [2022-01-18 06:53:44,471 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "max-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 06:53:44" (1/1) ... [2022-01-18 06:53:44,480 INFO L137 Inliner]: procedures = 4, calls = 3, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2022-01-18 06:53:44,481 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-01-18 06:53:44,482 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-18 06:53:44,482 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-18 06:53:44,482 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-18 06:53:44,486 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "max-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 06:53:44" (1/1) ... [2022-01-18 06:53:44,486 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "max-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 06:53:44" (1/1) ... [2022-01-18 06:53:44,487 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "max-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 06:53:44" (1/1) ... [2022-01-18 06:53:44,487 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "max-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 06:53:44" (1/1) ... [2022-01-18 06:53:44,489 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "max-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 06:53:44" (1/1) ... [2022-01-18 06:53:44,490 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "max-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 06:53:44" (1/1) ... [2022-01-18 06:53:44,491 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "max-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 06:53:44" (1/1) ... [2022-01-18 06:53:44,491 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-18 06:53:44,492 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-18 06:53:44,492 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-18 06:53:44,492 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-18 06:53:44,493 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "max-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 06:53:44" (1/1) ... [2022-01-18 06:53:44,497 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-18 06:53:44,510 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:53:44,545 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-01-18 06:53:44,556 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-01-18 06:53:44,575 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2022-01-18 06:53:44,575 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-01-18 06:53:44,575 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-01-18 06:53:44,576 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2022-01-18 06:53:44,576 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-01-18 06:53:44,576 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-01-18 06:53:44,576 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2022-01-18 06:53:44,576 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-18 06:53:44,576 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-18 06:53:44,576 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2022-01-18 06:53:44,576 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2022-01-18 06:53:44,576 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2022-01-18 06:53:44,577 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-01-18 06:53:44,609 INFO L234 CfgBuilder]: Building ICFG [2022-01-18 06:53:44,610 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-18 06:53:44,732 INFO L275 CfgBuilder]: Performing block encoding [2022-01-18 06:53:44,741 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-18 06:53:44,741 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2022-01-18 06:53:44,743 INFO L202 PluginConnector]: Adding new model max-array.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.01 06:53:44 BoogieIcfgContainer [2022-01-18 06:53:44,743 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-18 06:53:44,744 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-18 06:53:44,744 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-18 06:53:44,761 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-18 06:53:44,761 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "max-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 06:53:44" (1/2) ... [2022-01-18 06:53:44,762 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@18fde1f and model type max-array.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.01 06:53:44, skipping insertion in model container [2022-01-18 06:53:44,762 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "max-array.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.01 06:53:44" (2/2) ... [2022-01-18 06:53:44,763 INFO L111 eAbstractionObserver]: Analyzing ICFG max-array.wvr.bpl [2022-01-18 06:53:44,766 WARN L149 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-01-18 06:53:44,766 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-01-18 06:53:44,767 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-18 06:53:44,767 INFO L513 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-01-18 06:53:44,789 INFO L148 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2022-01-18 06:53:44,825 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-18 06:53:44,830 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2022-01-18 06:53:44,830 INFO L340 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2022-01-18 06:53:44,843 INFO L111 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 36 places, 29 transitions, 82 flow [2022-01-18 06:53:44,866 INFO L133 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 112 states, 111 states have (on average 2.810810810810811) internal successors, (312), 111 states have internal predecessors, (312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:53:44,868 INFO L276 IsEmpty]: Start isEmpty. Operand has 112 states, 111 states have (on average 2.810810810810811) internal successors, (312), 111 states have internal predecessors, (312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:53:44,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-01-18 06:53:44,874 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:53:44,874 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:53:44,874 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 06:53:44,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:53:44,878 INFO L85 PathProgramCache]: Analyzing trace with hash -1562983410, now seen corresponding path program 1 times [2022-01-18 06:53:44,883 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:53:44,883 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [230398155] [2022-01-18 06:53:44,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:53:44,884 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:53:44,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:53:44,993 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:53:44,993 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:53:44,993 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [230398155] [2022-01-18 06:53:44,994 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [230398155] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-18 06:53:44,994 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-18 06:53:44,994 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-18 06:53:44,995 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1725728191] [2022-01-18 06:53:44,995 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-18 06:53:44,998 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-18 06:53:44,998 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:53:45,024 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-18 06:53:45,025 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-18 06:53:45,026 INFO L87 Difference]: Start difference. First operand has 112 states, 111 states have (on average 2.810810810810811) internal successors, (312), 111 states have internal predecessors, (312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) 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) [2022-01-18 06:53:45,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:53:45,063 INFO L93 Difference]: Finished difference Result 217 states and 617 transitions. [2022-01-18 06:53:45,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-18 06:53:45,065 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 [2022-01-18 06:53:45,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:53:45,072 INFO L225 Difference]: With dead ends: 217 [2022-01-18 06:53:45,073 INFO L226 Difference]: Without dead ends: 202 [2022-01-18 06:53:45,074 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-18 06:53:45,076 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 3 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-18 06:53:45,076 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 27 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-18 06:53:45,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2022-01-18 06:53:45,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 149. [2022-01-18 06:53:45,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 148 states have (on average 2.831081081081081) internal successors, (419), 148 states have internal predecessors, (419), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:53:45,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 419 transitions. [2022-01-18 06:53:45,171 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 419 transitions. Word has length 18 [2022-01-18 06:53:45,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:53:45,171 INFO L470 AbstractCegarLoop]: Abstraction has 149 states and 419 transitions. [2022-01-18 06:53:45,172 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) [2022-01-18 06:53:45,172 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 419 transitions. [2022-01-18 06:53:45,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 06:53:45,176 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:53:45,176 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] [2022-01-18 06:53:45,176 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-01-18 06:53:45,176 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 06:53:45,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:53:45,177 INFO L85 PathProgramCache]: Analyzing trace with hash -1322843154, now seen corresponding path program 1 times [2022-01-18 06:53:45,177 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:53:45,177 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1460402125] [2022-01-18 06:53:45,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:53:45,178 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:53:45,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:53:45,239 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 06:53:45,239 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:53:45,240 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1460402125] [2022-01-18 06:53:45,240 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1460402125] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-18 06:53:45,240 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-18 06:53:45,240 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-18 06:53:45,240 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1870829891] [2022-01-18 06:53:45,240 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-18 06:53:45,241 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-18 06:53:45,241 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:53:45,242 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-18 06:53:45,242 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-18 06:53:45,242 INFO L87 Difference]: Start difference. First operand 149 states and 419 transitions. Second operand has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:53:45,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:53:45,312 INFO L93 Difference]: Finished difference Result 158 states and 445 transitions. [2022-01-18 06:53:45,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-18 06:53:45,313 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 06:53:45,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:53:45,314 INFO L225 Difference]: With dead ends: 158 [2022-01-18 06:53:45,314 INFO L226 Difference]: Without dead ends: 158 [2022-01-18 06:53:45,314 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-18 06:53:45,315 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 34 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-18 06:53:45,315 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 15 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-18 06:53:45,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2022-01-18 06:53:45,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 133. [2022-01-18 06:53:45,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 132 states have (on average 2.8333333333333335) internal successors, (374), 132 states have internal predecessors, (374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:53:45,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 374 transitions. [2022-01-18 06:53:45,329 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 374 transitions. Word has length 20 [2022-01-18 06:53:45,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:53:45,330 INFO L470 AbstractCegarLoop]: Abstraction has 133 states and 374 transitions. [2022-01-18 06:53:45,330 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:53:45,330 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 374 transitions. [2022-01-18 06:53:45,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 06:53:45,331 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:53:45,333 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] [2022-01-18 06:53:45,333 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-01-18 06:53:45,333 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 06:53:45,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:53:45,334 INFO L85 PathProgramCache]: Analyzing trace with hash 286241452, now seen corresponding path program 1 times [2022-01-18 06:53:45,334 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:53:45,334 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1292018176] [2022-01-18 06:53:45,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:53:45,335 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:53:45,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:53:45,402 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 06:53:45,402 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:53:45,402 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1292018176] [2022-01-18 06:53:45,403 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1292018176] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-18 06:53:45,403 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-18 06:53:45,403 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-18 06:53:45,403 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1525323951] [2022-01-18 06:53:45,403 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-18 06:53:45,404 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-18 06:53:45,404 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:53:45,405 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-18 06:53:45,405 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-01-18 06:53:45,405 INFO L87 Difference]: Start difference. First operand 133 states and 374 transitions. Second operand has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:53:45,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:53:45,455 INFO L93 Difference]: Finished difference Result 183 states and 522 transitions. [2022-01-18 06:53:45,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-18 06:53:45,456 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 06:53:45,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:53:45,458 INFO L225 Difference]: With dead ends: 183 [2022-01-18 06:53:45,458 INFO L226 Difference]: Without dead ends: 183 [2022-01-18 06:53:45,458 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-01-18 06:53:45,460 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 76 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 13 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-18 06:53:45,460 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [76 Valid, 13 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-18 06:53:45,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2022-01-18 06:53:45,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 158. [2022-01-18 06:53:45,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158 states, 157 states have (on average 2.8535031847133756) internal successors, (448), 157 states have internal predecessors, (448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:53:45,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 448 transitions. [2022-01-18 06:53:45,472 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 448 transitions. Word has length 20 [2022-01-18 06:53:45,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:53:45,472 INFO L470 AbstractCegarLoop]: Abstraction has 158 states and 448 transitions. [2022-01-18 06:53:45,472 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:53:45,473 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 448 transitions. [2022-01-18 06:53:45,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-18 06:53:45,474 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:53:45,475 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] [2022-01-18 06:53:45,475 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-01-18 06:53:45,475 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 06:53:45,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:53:45,476 INFO L85 PathProgramCache]: Analyzing trace with hash -867206516, now seen corresponding path program 1 times [2022-01-18 06:53:45,476 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:53:45,476 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [63675538] [2022-01-18 06:53:45,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:53:45,477 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:53:45,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:53:45,851 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:53:45,851 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:53:45,852 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [63675538] [2022-01-18 06:53:45,852 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [63675538] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:53:45,853 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [496976957] [2022-01-18 06:53:45,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:53:45,856 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:53:45,856 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:53:45,866 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 06:53:45,868 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-01-18 06:53:45,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:53:45,911 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 17 conjunts are in the unsatisfiable core [2022-01-18 06:53:45,916 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:53:46,432 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 32 [2022-01-18 06:53:46,504 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:53:46,504 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:53:46,686 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 06:53:46,687 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 43 [2022-01-18 06:53:46,873 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:53:46,873 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [496976957] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:53:46,874 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:53:46,874 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 16 [2022-01-18 06:53:46,878 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [388877534] [2022-01-18 06:53:46,878 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:53:46,879 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-18 06:53:46,880 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:53:46,880 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-18 06:53:46,882 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=218, Unknown=0, NotChecked=0, Total=272 [2022-01-18 06:53:46,882 INFO L87 Difference]: Start difference. First operand 158 states and 448 transitions. Second operand has 17 states, 17 states have (on average 2.9411764705882355) internal successors, (50), 16 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) [2022-01-18 06:53:47,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:53:47,309 INFO L93 Difference]: Finished difference Result 366 states and 1043 transitions. [2022-01-18 06:53:47,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-18 06:53:47,310 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.9411764705882355) internal successors, (50), 16 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 22 [2022-01-18 06:53:47,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:53:47,312 INFO L225 Difference]: With dead ends: 366 [2022-01-18 06:53:47,312 INFO L226 Difference]: Without dead ends: 351 [2022-01-18 06:53:47,312 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 31 SyntacticMatches, 4 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=115, Invalid=391, Unknown=0, NotChecked=0, Total=506 [2022-01-18 06:53:47,313 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 136 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 231 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 136 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 245 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 231 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 06:53:47,313 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [136 Valid, 61 Invalid, 245 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 231 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 06:53:47,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 351 states. [2022-01-18 06:53:47,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 351 to 224. [2022-01-18 06:53:47,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 224 states, 223 states have (on average 2.8699551569506725) internal successors, (640), 223 states have internal predecessors, (640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:53:47,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 640 transitions. [2022-01-18 06:53:47,334 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 640 transitions. Word has length 22 [2022-01-18 06:53:47,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:53:47,335 INFO L470 AbstractCegarLoop]: Abstraction has 224 states and 640 transitions. [2022-01-18 06:53:47,335 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.9411764705882355) internal successors, (50), 16 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) [2022-01-18 06:53:47,335 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 640 transitions. [2022-01-18 06:53:47,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-18 06:53:47,339 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:53:47,340 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] [2022-01-18 06:53:47,376 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-01-18 06:53:47,540 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:53:47,541 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 06:53:47,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:53:47,541 INFO L85 PathProgramCache]: Analyzing trace with hash -1035015608, now seen corresponding path program 2 times [2022-01-18 06:53:47,541 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:53:47,542 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1144048820] [2022-01-18 06:53:47,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:53:47,542 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:53:47,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:53:47,880 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:53:47,880 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:53:47,881 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1144048820] [2022-01-18 06:53:47,881 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1144048820] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:53:47,882 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1373229219] [2022-01-18 06:53:47,882 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 06:53:47,883 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:53:47,883 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:53:47,885 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 06:53:47,918 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-01-18 06:53:47,945 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 06:53:47,946 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:53:47,946 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 16 conjunts are in the unsatisfiable core [2022-01-18 06:53:47,948 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:53:48,195 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 06:53:48,196 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 41 [2022-01-18 06:53:48,574 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:53:48,575 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:53:48,692 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 06:53:48,692 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 43 [2022-01-18 06:53:48,828 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:53:48,829 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1373229219] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:53:48,829 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:53:48,829 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 8] total 18 [2022-01-18 06:53:48,829 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1118339278] [2022-01-18 06:53:48,829 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:53:48,830 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-18 06:53:48,830 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:53:48,830 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-18 06:53:48,831 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2022-01-18 06:53:48,831 INFO L87 Difference]: Start difference. First operand 224 states and 640 transitions. Second operand has 19 states, 19 states have (on average 2.8947368421052633) internal successors, (55), 18 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:53:49,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:53:49,636 INFO L93 Difference]: Finished difference Result 486 states and 1409 transitions. [2022-01-18 06:53:49,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-01-18 06:53:49,636 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.8947368421052633) internal successors, (55), 18 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-01-18 06:53:49,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:53:49,639 INFO L225 Difference]: With dead ends: 486 [2022-01-18 06:53:49,639 INFO L226 Difference]: Without dead ends: 471 [2022-01-18 06:53:49,639 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 196 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=219, Invalid=711, Unknown=0, NotChecked=0, Total=930 [2022-01-18 06:53:49,640 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 256 mSDsluCounter, 180 mSDsCounter, 0 mSdLazyCounter, 470 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 256 SdHoareTripleChecker+Valid, 94 SdHoareTripleChecker+Invalid, 506 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 470 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 06:53:49,640 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [256 Valid, 94 Invalid, 506 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 470 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 06:53:49,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 471 states. [2022-01-18 06:53:49,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 471 to 229. [2022-01-18 06:53:49,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 229 states, 228 states have (on average 2.912280701754386) internal successors, (664), 228 states have internal predecessors, (664), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:53:49,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 664 transitions. [2022-01-18 06:53:49,648 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 664 transitions. Word has length 22 [2022-01-18 06:53:49,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:53:49,648 INFO L470 AbstractCegarLoop]: Abstraction has 229 states and 664 transitions. [2022-01-18 06:53:49,648 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.8947368421052633) internal successors, (55), 18 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:53:49,648 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 664 transitions. [2022-01-18 06:53:49,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-18 06:53:49,649 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:53:49,649 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] [2022-01-18 06:53:49,670 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-01-18 06:53:49,867 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:53:49,867 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 06:53:49,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:53:49,868 INFO L85 PathProgramCache]: Analyzing trace with hash -736242160, now seen corresponding path program 3 times [2022-01-18 06:53:49,868 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:53:49,868 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [820105173] [2022-01-18 06:53:49,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:53:49,868 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:53:49,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:53:49,995 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:53:49,995 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:53:49,995 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [820105173] [2022-01-18 06:53:49,995 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [820105173] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:53:49,995 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [894603150] [2022-01-18 06:53:49,995 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 06:53:49,995 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:53:49,995 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:53:49,996 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 06:53:50,016 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-01-18 06:53:50,052 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-01-18 06:53:50,052 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:53:50,053 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 15 conjunts are in the unsatisfiable core [2022-01-18 06:53:50,054 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:53:50,199 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 32 [2022-01-18 06:53:50,275 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:53:50,276 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:53:50,325 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 06:53:50,326 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 43 [2022-01-18 06:53:50,453 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:53:50,454 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [894603150] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:53:50,454 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:53:50,454 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2022-01-18 06:53:50,454 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2054938943] [2022-01-18 06:53:50,454 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:53:50,454 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-01-18 06:53:50,454 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:53:50,455 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-01-18 06:53:50,455 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2022-01-18 06:53:50,455 INFO L87 Difference]: Start difference. First operand 229 states and 664 transitions. Second operand has 15 states, 15 states have (on average 3.2666666666666666) internal successors, (49), 14 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) [2022-01-18 06:53:50,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:53:50,758 INFO L93 Difference]: Finished difference Result 418 states and 1203 transitions. [2022-01-18 06:53:50,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-18 06:53:50,759 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.2666666666666666) internal successors, (49), 14 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 22 [2022-01-18 06:53:50,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:53:50,761 INFO L225 Difference]: With dead ends: 418 [2022-01-18 06:53:50,762 INFO L226 Difference]: Without dead ends: 403 [2022-01-18 06:53:50,762 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 34 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=128, Invalid=378, Unknown=0, NotChecked=0, Total=506 [2022-01-18 06:53:50,763 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 96 mSDsluCounter, 149 mSDsCounter, 0 mSdLazyCounter, 270 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 98 SdHoareTripleChecker+Invalid, 280 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 270 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 06:53:50,763 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [96 Valid, 98 Invalid, 280 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 270 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 06:53:50,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 403 states. [2022-01-18 06:53:50,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 403 to 241. [2022-01-18 06:53:50,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 241 states, 240 states have (on average 2.8916666666666666) internal successors, (694), 240 states have internal predecessors, (694), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:53:50,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 694 transitions. [2022-01-18 06:53:50,771 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 694 transitions. Word has length 22 [2022-01-18 06:53:50,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:53:50,772 INFO L470 AbstractCegarLoop]: Abstraction has 241 states and 694 transitions. [2022-01-18 06:53:50,772 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.2666666666666666) internal successors, (49), 14 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) [2022-01-18 06:53:50,772 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 694 transitions. [2022-01-18 06:53:50,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-18 06:53:50,773 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:53:50,773 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] [2022-01-18 06:53:50,800 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-01-18 06:53:50,992 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:53:50,992 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 06:53:50,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:53:50,993 INFO L85 PathProgramCache]: Analyzing trace with hash 834583440, now seen corresponding path program 4 times [2022-01-18 06:53:50,993 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:53:50,993 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1858143378] [2022-01-18 06:53:50,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:53:50,993 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:53:51,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:53:51,124 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:53:51,124 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:53:51,124 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1858143378] [2022-01-18 06:53:51,124 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1858143378] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:53:51,125 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2051660483] [2022-01-18 06:53:51,125 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 06:53:51,125 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:53:51,125 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:53:51,126 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 06:53:51,127 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-01-18 06:53:51,154 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 06:53:51,154 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:53:51,155 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 17 conjunts are in the unsatisfiable core [2022-01-18 06:53:51,156 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:53:51,320 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 06:53:51,321 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 41 [2022-01-18 06:53:51,577 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:53:51,577 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:53:51,648 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 06:53:51,649 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 43 [2022-01-18 06:53:51,791 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:53:51,791 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2051660483] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:53:51,791 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:53:51,791 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 16 [2022-01-18 06:53:51,791 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1732133014] [2022-01-18 06:53:51,792 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:53:51,792 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-18 06:53:51,792 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:53:51,792 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-18 06:53:51,792 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2022-01-18 06:53:51,793 INFO L87 Difference]: Start difference. First operand 241 states and 694 transitions. Second operand has 17 states, 17 states have (on average 2.9411764705882355) internal successors, (50), 16 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) [2022-01-18 06:53:52,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:53:52,084 INFO L93 Difference]: Finished difference Result 374 states and 1089 transitions. [2022-01-18 06:53:52,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-18 06:53:52,088 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.9411764705882355) internal successors, (50), 16 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 22 [2022-01-18 06:53:52,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:53:52,090 INFO L225 Difference]: With dead ends: 374 [2022-01-18 06:53:52,090 INFO L226 Difference]: Without dead ends: 359 [2022-01-18 06:53:52,090 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 31 SyntacticMatches, 4 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=114, Invalid=348, Unknown=0, NotChecked=0, Total=462 [2022-01-18 06:53:52,091 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 94 mSDsluCounter, 192 mSDsCounter, 0 mSdLazyCounter, 283 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 122 SdHoareTripleChecker+Invalid, 300 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 283 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 7 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 06:53:52,091 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [94 Valid, 122 Invalid, 300 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 283 Invalid, 0 Unknown, 7 Unchecked, 0.1s Time] [2022-01-18 06:53:52,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 359 states. [2022-01-18 06:53:52,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 359 to 245. [2022-01-18 06:53:52,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 245 states, 244 states have (on average 2.9262295081967213) internal successors, (714), 244 states have internal predecessors, (714), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:53:52,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 245 states to 245 states and 714 transitions. [2022-01-18 06:53:52,099 INFO L78 Accepts]: Start accepts. Automaton has 245 states and 714 transitions. Word has length 22 [2022-01-18 06:53:52,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:53:52,099 INFO L470 AbstractCegarLoop]: Abstraction has 245 states and 714 transitions. [2022-01-18 06:53:52,099 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.9411764705882355) internal successors, (50), 16 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) [2022-01-18 06:53:52,099 INFO L276 IsEmpty]: Start isEmpty. Operand 245 states and 714 transitions. [2022-01-18 06:53:52,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-18 06:53:52,100 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:53:52,100 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] [2022-01-18 06:53:52,121 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-01-18 06:53:52,321 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:53:52,321 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 06:53:52,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:53:52,323 INFO L85 PathProgramCache]: Analyzing trace with hash -1412835854, now seen corresponding path program 5 times [2022-01-18 06:53:52,323 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:53:52,323 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1064559365] [2022-01-18 06:53:52,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:53:52,323 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:53:52,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:53:52,465 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:53:52,466 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:53:52,466 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1064559365] [2022-01-18 06:53:52,466 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1064559365] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:53:52,466 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1376863273] [2022-01-18 06:53:52,466 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 06:53:52,466 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:53:52,466 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:53:52,467 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 06:53:52,468 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-01-18 06:53:52,490 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 06:53:52,490 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:53:52,490 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 17 conjunts are in the unsatisfiable core [2022-01-18 06:53:52,491 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:53:52,677 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 06:53:52,677 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 41 [2022-01-18 06:53:53,137 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:53:53,137 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:53:53,244 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 06:53:53,244 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 43 [2022-01-18 06:53:53,403 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:53:53,403 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1376863273] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:53:53,403 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:53:53,403 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9, 9] total 21 [2022-01-18 06:53:53,404 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1039913051] [2022-01-18 06:53:53,404 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:53:53,404 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 06:53:53,404 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:53:53,404 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 06:53:53,404 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=328, Unknown=0, NotChecked=0, Total=420 [2022-01-18 06:53:53,404 INFO L87 Difference]: Start difference. First operand 245 states and 714 transitions. Second operand has 21 states, 21 states have (on average 2.619047619047619) internal successors, (55), 21 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:53:57,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:53:57,891 INFO L93 Difference]: Finished difference Result 1141 states and 3378 transitions. [2022-01-18 06:53:57,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2022-01-18 06:53:57,891 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.619047619047619) internal successors, (55), 21 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-01-18 06:53:57,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:53:57,896 INFO L225 Difference]: With dead ends: 1141 [2022-01-18 06:53:57,896 INFO L226 Difference]: Without dead ends: 1111 [2022-01-18 06:53:57,898 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2438 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=1386, Invalid=5420, Unknown=0, NotChecked=0, Total=6806 [2022-01-18 06:53:57,898 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 532 mSDsluCounter, 533 mSDsCounter, 0 mSdLazyCounter, 877 mSolverCounterSat, 77 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 532 SdHoareTripleChecker+Valid, 286 SdHoareTripleChecker+Invalid, 1169 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 877 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 215 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 06:53:57,898 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [532 Valid, 286 Invalid, 1169 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [77 Valid, 877 Invalid, 0 Unknown, 215 Unchecked, 0.5s Time] [2022-01-18 06:53:57,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1111 states. [2022-01-18 06:53:57,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1111 to 255. [2022-01-18 06:53:57,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 255 states, 254 states have (on average 3.0) internal successors, (762), 254 states have internal predecessors, (762), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:53:57,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 255 states to 255 states and 762 transitions. [2022-01-18 06:53:57,908 INFO L78 Accepts]: Start accepts. Automaton has 255 states and 762 transitions. Word has length 22 [2022-01-18 06:53:57,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:53:57,908 INFO L470 AbstractCegarLoop]: Abstraction has 255 states and 762 transitions. [2022-01-18 06:53:57,909 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.619047619047619) internal successors, (55), 21 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:53:57,909 INFO L276 IsEmpty]: Start isEmpty. Operand 255 states and 762 transitions. [2022-01-18 06:53:57,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-18 06:53:57,909 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:53:57,909 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] [2022-01-18 06:53:57,926 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-01-18 06:53:58,125 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:53:58,126 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 06:53:58,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:53:58,126 INFO L85 PathProgramCache]: Analyzing trace with hash 151290546, now seen corresponding path program 6 times [2022-01-18 06:53:58,127 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:53:58,127 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1294343475] [2022-01-18 06:53:58,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:53:58,127 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:53:58,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:53:58,259 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:53:58,260 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:53:58,260 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1294343475] [2022-01-18 06:53:58,260 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1294343475] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:53:58,260 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1967813494] [2022-01-18 06:53:58,260 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 06:53:58,260 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:53:58,260 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:53:58,261 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 06:53:58,262 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-01-18 06:53:58,282 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-01-18 06:53:58,282 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:53:58,283 INFO L263 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 16 conjunts are in the unsatisfiable core [2022-01-18 06:53:58,284 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:53:58,444 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 06:53:58,445 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 41 [2022-01-18 06:53:58,725 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:53:58,725 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:53:58,804 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 06:53:58,805 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 43 [2022-01-18 06:53:58,969 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:53:58,969 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1967813494] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:53:58,969 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:53:58,970 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 17 [2022-01-18 06:53:58,970 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1363449602] [2022-01-18 06:53:58,970 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:53:58,970 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-18 06:53:58,970 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:53:58,971 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-18 06:53:58,971 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=238, Unknown=0, NotChecked=0, Total=306 [2022-01-18 06:53:58,971 INFO L87 Difference]: Start difference. First operand 255 states and 762 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) [2022-01-18 06:53:59,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:53:59,902 INFO L93 Difference]: Finished difference Result 597 states and 1769 transitions. [2022-01-18 06:53:59,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-01-18 06:53:59,902 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 22 [2022-01-18 06:53:59,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:53:59,904 INFO L225 Difference]: With dead ends: 597 [2022-01-18 06:53:59,905 INFO L226 Difference]: Without dead ends: 582 [2022-01-18 06:53:59,905 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 254 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=309, Invalid=881, Unknown=0, NotChecked=0, Total=1190 [2022-01-18 06:53:59,905 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 189 mSDsluCounter, 188 mSDsCounter, 0 mSdLazyCounter, 490 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 189 SdHoareTripleChecker+Valid, 121 SdHoareTripleChecker+Invalid, 520 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 490 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 06:53:59,906 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [189 Valid, 121 Invalid, 520 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 490 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 06:53:59,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 582 states. [2022-01-18 06:53:59,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 582 to 258. [2022-01-18 06:53:59,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 258 states, 257 states have (on average 2.9961089494163424) internal successors, (770), 257 states have internal predecessors, (770), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:53:59,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 258 states to 258 states and 770 transitions. [2022-01-18 06:53:59,915 INFO L78 Accepts]: Start accepts. Automaton has 258 states and 770 transitions. Word has length 22 [2022-01-18 06:53:59,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:53:59,915 INFO L470 AbstractCegarLoop]: Abstraction has 258 states and 770 transitions. [2022-01-18 06:53:59,915 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) [2022-01-18 06:53:59,915 INFO L276 IsEmpty]: Start isEmpty. Operand 258 states and 770 transitions. [2022-01-18 06:53:59,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 06:53:59,922 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:53:59,922 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:53:59,950 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-01-18 06:54:00,141 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:54:00,142 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 06:54:00,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:54:00,142 INFO L85 PathProgramCache]: Analyzing trace with hash -1176864790, now seen corresponding path program 7 times [2022-01-18 06:54:00,142 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:54:00,142 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1037669043] [2022-01-18 06:54:00,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:54:00,142 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:54:00,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:54:00,190 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:54:00,190 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:54:00,190 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1037669043] [2022-01-18 06:54:00,191 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1037669043] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:54:00,191 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [775672302] [2022-01-18 06:54:00,191 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 06:54:00,191 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:54:00,191 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:54:00,204 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 06:54:00,205 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-01-18 06:54:00,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:54:00,227 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-18 06:54:00,228 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:54:00,303 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:54:00,303 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:54:00,406 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:54:00,406 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [775672302] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:54:00,406 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:54:00,406 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 15 [2022-01-18 06:54:00,407 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [102910715] [2022-01-18 06:54:00,407 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:54:00,407 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-01-18 06:54:00,407 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:54:00,407 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-01-18 06:54:00,407 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2022-01-18 06:54:00,407 INFO L87 Difference]: Start difference. First operand 258 states and 770 transitions. Second operand has 15 states, 15 states have (on average 3.2666666666666666) internal successors, (49), 15 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) [2022-01-18 06:54:01,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:54:01,140 INFO L93 Difference]: Finished difference Result 1123 states and 3194 transitions. [2022-01-18 06:54:01,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-01-18 06:54:01,140 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.2666666666666666) internal successors, (49), 15 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 [2022-01-18 06:54:01,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:54:01,146 INFO L225 Difference]: With dead ends: 1123 [2022-01-18 06:54:01,146 INFO L226 Difference]: Without dead ends: 1123 [2022-01-18 06:54:01,147 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 39 SyntacticMatches, 2 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 913 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=714, Invalid=2148, Unknown=0, NotChecked=0, Total=2862 [2022-01-18 06:54:01,147 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 271 mSDsluCounter, 363 mSDsCounter, 0 mSdLazyCounter, 725 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 271 SdHoareTripleChecker+Valid, 219 SdHoareTripleChecker+Invalid, 786 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 725 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 06:54:01,148 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [271 Valid, 219 Invalid, 786 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 725 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 06:54:01,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1123 states. [2022-01-18 06:54:01,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1123 to 322. [2022-01-18 06:54:01,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 322 states, 321 states have (on average 3.196261682242991) internal successors, (1026), 321 states have internal predecessors, (1026), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:54:01,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 322 states to 322 states and 1026 transitions. [2022-01-18 06:54:01,162 INFO L78 Accepts]: Start accepts. Automaton has 322 states and 1026 transitions. Word has length 24 [2022-01-18 06:54:01,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:54:01,162 INFO L470 AbstractCegarLoop]: Abstraction has 322 states and 1026 transitions. [2022-01-18 06:54:01,163 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.2666666666666666) internal successors, (49), 15 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) [2022-01-18 06:54:01,163 INFO L276 IsEmpty]: Start isEmpty. Operand 322 states and 1026 transitions. [2022-01-18 06:54:01,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 06:54:01,164 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:54:01,164 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:54:01,184 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-01-18 06:54:01,379 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:54:01,379 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 06:54:01,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:54:01,380 INFO L85 PathProgramCache]: Analyzing trace with hash 2141783662, now seen corresponding path program 8 times [2022-01-18 06:54:01,380 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:54:01,380 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1704772964] [2022-01-18 06:54:01,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:54:01,380 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:54:01,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:54:01,418 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:54:01,419 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:54:01,419 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1704772964] [2022-01-18 06:54:01,419 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1704772964] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:54:01,419 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [41729684] [2022-01-18 06:54:01,419 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 06:54:01,419 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:54:01,419 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:54:01,420 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 06:54:01,421 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-01-18 06:54:01,442 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 06:54:01,442 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:54:01,442 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-18 06:54:01,443 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:54:01,540 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:54:01,540 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:54:01,647 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:54:01,647 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [41729684] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:54:01,647 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:54:01,647 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 17 [2022-01-18 06:54:01,647 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [808099219] [2022-01-18 06:54:01,647 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:54:01,648 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-18 06:54:01,648 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:54:01,648 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-18 06:54:01,648 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2022-01-18 06:54:01,648 INFO L87 Difference]: Start difference. First operand 322 states and 1026 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) [2022-01-18 06:54:03,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:54:03,614 INFO L93 Difference]: Finished difference Result 1814 states and 5087 transitions. [2022-01-18 06:54:03,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2022-01-18 06:54:03,615 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 24 [2022-01-18 06:54:03,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:54:03,623 INFO L225 Difference]: With dead ends: 1814 [2022-01-18 06:54:03,623 INFO L226 Difference]: Without dead ends: 1814 [2022-01-18 06:54:03,627 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 37 SyntacticMatches, 2 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4272 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=2378, Invalid=8752, Unknown=0, NotChecked=0, Total=11130 [2022-01-18 06:54:03,627 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 444 mSDsluCounter, 568 mSDsCounter, 0 mSdLazyCounter, 1172 mSolverCounterSat, 97 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 444 SdHoareTripleChecker+Valid, 326 SdHoareTripleChecker+Invalid, 1269 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 97 IncrementalHoareTripleChecker+Valid, 1172 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 06:54:03,628 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [444 Valid, 326 Invalid, 1269 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [97 Valid, 1172 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-18 06:54:03,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1814 states. [2022-01-18 06:54:03,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1814 to 315. [2022-01-18 06:54:03,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 315 states, 314 states have (on average 3.1656050955414012) internal successors, (994), 314 states have internal predecessors, (994), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:54:03,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 315 states to 315 states and 994 transitions. [2022-01-18 06:54:03,673 INFO L78 Accepts]: Start accepts. Automaton has 315 states and 994 transitions. Word has length 24 [2022-01-18 06:54:03,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:54:03,673 INFO L470 AbstractCegarLoop]: Abstraction has 315 states and 994 transitions. [2022-01-18 06:54:03,674 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) [2022-01-18 06:54:03,674 INFO L276 IsEmpty]: Start isEmpty. Operand 315 states and 994 transitions. [2022-01-18 06:54:03,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 06:54:03,675 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:54:03,675 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:54:03,701 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-01-18 06:54:03,886 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,SelfDestructingSolverStorable10 [2022-01-18 06:54:03,886 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 06:54:03,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:54:03,887 INFO L85 PathProgramCache]: Analyzing trace with hash -1586231554, now seen corresponding path program 9 times [2022-01-18 06:54:03,887 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:54:03,887 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [524356098] [2022-01-18 06:54:03,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:54:03,887 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:54:03,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:54:03,931 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:54:03,932 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:54:03,932 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [524356098] [2022-01-18 06:54:03,932 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [524356098] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:54:03,932 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [614909515] [2022-01-18 06:54:03,932 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 06:54:03,932 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:54:03,932 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:54:03,933 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 06:54:03,934 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-01-18 06:54:03,961 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 06:54:03,961 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:54:03,962 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-18 06:54:03,962 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:54:04,065 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:54:04,066 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:54:04,145 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:54:04,145 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [614909515] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:54:04,145 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:54:04,145 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 17 [2022-01-18 06:54:04,146 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1669572469] [2022-01-18 06:54:04,146 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:54:04,146 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-18 06:54:04,146 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:54:04,146 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-18 06:54:04,146 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2022-01-18 06:54:04,147 INFO L87 Difference]: Start difference. First operand 315 states and 994 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) [2022-01-18 06:54:04,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:54:04,978 INFO L93 Difference]: Finished difference Result 1470 states and 4126 transitions. [2022-01-18 06:54:04,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2022-01-18 06:54:04,978 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 24 [2022-01-18 06:54:04,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:54:04,985 INFO L225 Difference]: With dead ends: 1470 [2022-01-18 06:54:04,985 INFO L226 Difference]: Without dead ends: 1470 [2022-01-18 06:54:04,987 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 37 SyntacticMatches, 2 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1528 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=1095, Invalid=3327, Unknown=0, NotChecked=0, Total=4422 [2022-01-18 06:54:04,987 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 390 mSDsluCounter, 451 mSDsCounter, 0 mSdLazyCounter, 822 mSolverCounterSat, 89 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 390 SdHoareTripleChecker+Valid, 264 SdHoareTripleChecker+Invalid, 911 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 89 IncrementalHoareTripleChecker+Valid, 822 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 06:54:04,988 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [390 Valid, 264 Invalid, 911 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [89 Valid, 822 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 06:54:04,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1470 states. [2022-01-18 06:54:05,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1470 to 306. [2022-01-18 06:54:05,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 306 states, 305 states have (on average 3.1475409836065573) internal successors, (960), 305 states have internal predecessors, (960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:54:05,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 306 states to 306 states and 960 transitions. [2022-01-18 06:54:05,003 INFO L78 Accepts]: Start accepts. Automaton has 306 states and 960 transitions. Word has length 24 [2022-01-18 06:54:05,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:54:05,004 INFO L470 AbstractCegarLoop]: Abstraction has 306 states and 960 transitions. [2022-01-18 06:54:05,004 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) [2022-01-18 06:54:05,004 INFO L276 IsEmpty]: Start isEmpty. Operand 306 states and 960 transitions. [2022-01-18 06:54:05,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 06:54:05,005 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:54:05,005 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] [2022-01-18 06:54:05,033 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-01-18 06:54:05,228 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:54:05,228 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 06:54:05,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:54:05,229 INFO L85 PathProgramCache]: Analyzing trace with hash -650092882, now seen corresponding path program 1 times [2022-01-18 06:54:05,229 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:54:05,229 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [693547044] [2022-01-18 06:54:05,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:54:05,229 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:54:05,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:54:05,268 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 06:54:05,268 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:54:05,268 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [693547044] [2022-01-18 06:54:05,268 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [693547044] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:54:05,268 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1390892779] [2022-01-18 06:54:05,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:54:05,268 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:54:05,269 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:54:05,284 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 06:54:05,285 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-01-18 06:54:05,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:54:05,317 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 5 conjunts are in the unsatisfiable core [2022-01-18 06:54:05,318 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:54:05,408 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 06:54:05,408 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:54:05,475 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 06:54:05,475 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1390892779] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:54:05,476 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:54:05,476 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 10 [2022-01-18 06:54:05,476 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1728336553] [2022-01-18 06:54:05,476 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:54:05,476 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-01-18 06:54:05,476 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:54:05,476 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-01-18 06:54:05,476 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2022-01-18 06:54:05,476 INFO L87 Difference]: Start difference. First operand 306 states and 960 transitions. Second operand has 10 states, 10 states have (on average 4.0) internal successors, (40), 10 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:54:05,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:54:05,610 INFO L93 Difference]: Finished difference Result 685 states and 2024 transitions. [2022-01-18 06:54:05,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-18 06:54:05,611 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.0) internal successors, (40), 10 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-18 06:54:05,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:54:05,613 INFO L225 Difference]: With dead ends: 685 [2022-01-18 06:54:05,613 INFO L226 Difference]: Without dead ends: 679 [2022-01-18 06:54:05,613 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 42 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=97, Invalid=143, Unknown=0, NotChecked=0, Total=240 [2022-01-18 06:54:05,614 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 162 mSDsluCounter, 86 mSDsCounter, 0 mSdLazyCounter, 181 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 162 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 201 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 181 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 06:54:05,614 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [162 Valid, 46 Invalid, 201 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 181 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 06:54:05,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 679 states. [2022-01-18 06:54:05,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 679 to 429. [2022-01-18 06:54:05,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 429 states, 428 states have (on average 3.2406542056074765) internal successors, (1387), 428 states have internal predecessors, (1387), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:54:05,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 429 states to 429 states and 1387 transitions. [2022-01-18 06:54:05,622 INFO L78 Accepts]: Start accepts. Automaton has 429 states and 1387 transitions. Word has length 24 [2022-01-18 06:54:05,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:54:05,622 INFO L470 AbstractCegarLoop]: Abstraction has 429 states and 1387 transitions. [2022-01-18 06:54:05,622 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.0) internal successors, (40), 10 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:54:05,622 INFO L276 IsEmpty]: Start isEmpty. Operand 429 states and 1387 transitions. [2022-01-18 06:54:05,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 06:54:05,623 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:54:05,623 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:54:05,646 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-01-18 06:54:05,835 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,SelfDestructingSolverStorable12 [2022-01-18 06:54:05,836 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 06:54:05,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:54:05,836 INFO L85 PathProgramCache]: Analyzing trace with hash -1087061590, now seen corresponding path program 10 times [2022-01-18 06:54:05,836 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:54:05,836 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [91303118] [2022-01-18 06:54:05,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:54:05,836 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:54:05,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:54:05,871 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:54:05,871 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:54:05,871 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [91303118] [2022-01-18 06:54:05,871 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [91303118] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:54:05,871 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [580281610] [2022-01-18 06:54:05,871 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 06:54:05,871 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:54:05,871 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:54:05,872 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 06:54:05,873 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-01-18 06:54:05,893 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 06:54:05,893 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:54:05,893 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-18 06:54:05,894 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:54:05,985 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:54:05,985 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:54:06,041 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:54:06,041 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [580281610] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:54:06,041 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:54:06,041 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2022-01-18 06:54:06,041 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [355952809] [2022-01-18 06:54:06,041 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:54:06,042 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-01-18 06:54:06,042 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:54:06,042 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-01-18 06:54:06,042 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2022-01-18 06:54:06,042 INFO L87 Difference]: Start difference. First operand 429 states and 1387 transitions. Second operand has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 14 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:54:06,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:54:06,335 INFO L93 Difference]: Finished difference Result 1159 states and 3490 transitions. [2022-01-18 06:54:06,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-01-18 06:54:06,335 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 14 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have 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 [2022-01-18 06:54:06,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:54:06,339 INFO L225 Difference]: With dead ends: 1159 [2022-01-18 06:54:06,339 INFO L226 Difference]: Without dead ends: 1111 [2022-01-18 06:54:06,339 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 195 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=240, Invalid=690, Unknown=0, NotChecked=0, Total=930 [2022-01-18 06:54:06,339 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 278 mSDsluCounter, 222 mSDsCounter, 0 mSdLazyCounter, 349 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 278 SdHoareTripleChecker+Valid, 115 SdHoareTripleChecker+Invalid, 381 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 349 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 06:54:06,340 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [278 Valid, 115 Invalid, 381 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 349 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 06:54:06,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1111 states. [2022-01-18 06:54:06,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1111 to 639. [2022-01-18 06:54:06,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 639 states, 638 states have (on average 3.3448275862068964) internal successors, (2134), 638 states have internal predecessors, (2134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:54:06,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 639 states to 639 states and 2134 transitions. [2022-01-18 06:54:06,352 INFO L78 Accepts]: Start accepts. Automaton has 639 states and 2134 transitions. Word has length 24 [2022-01-18 06:54:06,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:54:06,352 INFO L470 AbstractCegarLoop]: Abstraction has 639 states and 2134 transitions. [2022-01-18 06:54:06,353 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 14 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:54:06,353 INFO L276 IsEmpty]: Start isEmpty. Operand 639 states and 2134 transitions. [2022-01-18 06:54:06,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 06:54:06,354 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:54:06,354 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] [2022-01-18 06:54:06,371 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-01-18 06:54:06,568 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-01-18 06:54:06,568 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 06:54:06,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:54:06,569 INFO L85 PathProgramCache]: Analyzing trace with hash -1793018922, now seen corresponding path program 2 times [2022-01-18 06:54:06,569 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:54:06,569 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1315385678] [2022-01-18 06:54:06,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:54:06,569 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:54:06,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:54:06,601 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 06:54:06,601 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:54:06,601 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1315385678] [2022-01-18 06:54:06,601 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1315385678] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:54:06,601 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [947825472] [2022-01-18 06:54:06,601 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 06:54:06,601 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:54:06,601 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:54:06,602 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 06:54:06,603 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-01-18 06:54:06,628 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 06:54:06,628 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:54:06,628 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 5 conjunts are in the unsatisfiable core [2022-01-18 06:54:06,632 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:54:06,715 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 06:54:06,715 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:54:06,795 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 06:54:06,795 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [947825472] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:54:06,795 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:54:06,795 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 10 [2022-01-18 06:54:06,795 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1209227828] [2022-01-18 06:54:06,795 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:54:06,795 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-01-18 06:54:06,796 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:54:06,796 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-01-18 06:54:06,796 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2022-01-18 06:54:06,796 INFO L87 Difference]: Start difference. First operand 639 states and 2134 transitions. Second operand has 10 states, 10 states have (on average 4.0) internal successors, (40), 10 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:54:06,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:54:06,993 INFO L93 Difference]: Finished difference Result 1267 states and 3847 transitions. [2022-01-18 06:54:06,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-01-18 06:54:06,994 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.0) internal successors, (40), 10 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-18 06:54:06,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:54:06,998 INFO L225 Difference]: With dead ends: 1267 [2022-01-18 06:54:06,998 INFO L226 Difference]: Without dead ends: 1267 [2022-01-18 06:54:06,998 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 41 SyntacticMatches, 3 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=146, Invalid=234, Unknown=0, NotChecked=0, Total=380 [2022-01-18 06:54:06,998 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 150 mSDsluCounter, 130 mSDsCounter, 0 mSdLazyCounter, 195 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 150 SdHoareTripleChecker+Valid, 75 SdHoareTripleChecker+Invalid, 219 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 195 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 06:54:06,999 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [150 Valid, 75 Invalid, 219 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 195 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 06:54:07,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1267 states. [2022-01-18 06:54:07,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1267 to 683. [2022-01-18 06:54:07,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 683 states, 682 states have (on average 3.3167155425219943) internal successors, (2262), 682 states have internal predecessors, (2262), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:54:07,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 683 states to 683 states and 2262 transitions. [2022-01-18 06:54:07,014 INFO L78 Accepts]: Start accepts. Automaton has 683 states and 2262 transitions. Word has length 24 [2022-01-18 06:54:07,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:54:07,014 INFO L470 AbstractCegarLoop]: Abstraction has 683 states and 2262 transitions. [2022-01-18 06:54:07,014 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.0) internal successors, (40), 10 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:54:07,014 INFO L276 IsEmpty]: Start isEmpty. Operand 683 states and 2262 transitions. [2022-01-18 06:54:07,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 06:54:07,016 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:54:07,016 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:54:07,036 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-01-18 06:54:07,234 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-01-18 06:54:07,234 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 06:54:07,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:54:07,235 INFO L85 PathProgramCache]: Analyzing trace with hash 1155266808, now seen corresponding path program 11 times [2022-01-18 06:54:07,235 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:54:07,235 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1592202497] [2022-01-18 06:54:07,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:54:07,235 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:54:07,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:54:07,262 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:54:07,263 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:54:07,263 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1592202497] [2022-01-18 06:54:07,263 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1592202497] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:54:07,263 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [83198759] [2022-01-18 06:54:07,263 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 06:54:07,263 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:54:07,263 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:54:07,264 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 06:54:07,279 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-01-18 06:54:07,300 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 06:54:07,300 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:54:07,300 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-18 06:54:07,301 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:54:07,360 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:54:07,361 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:54:07,406 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:54:07,406 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [83198759] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:54:07,406 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:54:07,406 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 13 [2022-01-18 06:54:07,406 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [724284445] [2022-01-18 06:54:07,406 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:54:07,406 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-01-18 06:54:07,406 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:54:07,406 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-01-18 06:54:07,407 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2022-01-18 06:54:07,407 INFO L87 Difference]: Start difference. First operand 683 states and 2262 transitions. Second operand has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:54:07,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:54:07,874 INFO L93 Difference]: Finished difference Result 2268 states and 6749 transitions. [2022-01-18 06:54:07,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-01-18 06:54:07,874 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-18 06:54:07,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:54:07,882 INFO L225 Difference]: With dead ends: 2268 [2022-01-18 06:54:07,882 INFO L226 Difference]: Without dead ends: 2268 [2022-01-18 06:54:07,882 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 41 SyntacticMatches, 2 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 518 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=449, Invalid=1357, Unknown=0, NotChecked=0, Total=1806 [2022-01-18 06:54:07,882 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 268 mSDsluCounter, 277 mSDsCounter, 0 mSdLazyCounter, 531 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 268 SdHoareTripleChecker+Valid, 181 SdHoareTripleChecker+Invalid, 592 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 531 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 06:54:07,883 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [268 Valid, 181 Invalid, 592 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 531 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 06:54:07,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2268 states. [2022-01-18 06:54:07,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2268 to 699. [2022-01-18 06:54:07,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 699 states, 698 states have (on average 3.312320916905444) internal successors, (2312), 698 states have internal predecessors, (2312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:54:07,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 699 states to 699 states and 2312 transitions. [2022-01-18 06:54:07,902 INFO L78 Accepts]: Start accepts. Automaton has 699 states and 2312 transitions. Word has length 24 [2022-01-18 06:54:07,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:54:07,902 INFO L470 AbstractCegarLoop]: Abstraction has 699 states and 2312 transitions. [2022-01-18 06:54:07,902 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:54:07,902 INFO L276 IsEmpty]: Start isEmpty. Operand 699 states and 2312 transitions. [2022-01-18 06:54:07,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 06:54:07,903 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:54:07,903 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:54:07,921 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2022-01-18 06:54:08,119 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,SelfDestructingSolverStorable15 [2022-01-18 06:54:08,119 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 06:54:08,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:54:08,120 INFO L85 PathProgramCache]: Analyzing trace with hash 1940180902, now seen corresponding path program 12 times [2022-01-18 06:54:08,120 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:54:08,120 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1318846681] [2022-01-18 06:54:08,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:54:08,120 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:54:08,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:54:08,160 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:54:08,160 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:54:08,160 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1318846681] [2022-01-18 06:54:08,160 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1318846681] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:54:08,160 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [921623700] [2022-01-18 06:54:08,160 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 06:54:08,160 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:54:08,160 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:54:08,161 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 06:54:08,162 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-01-18 06:54:08,181 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-01-18 06:54:08,181 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:54:08,182 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-18 06:54:08,182 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:54:08,249 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:54:08,249 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:54:08,309 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:54:08,309 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [921623700] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:54:08,309 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:54:08,309 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 13 [2022-01-18 06:54:08,309 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [64402249] [2022-01-18 06:54:08,309 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:54:08,309 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-01-18 06:54:08,309 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:54:08,310 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-01-18 06:54:08,310 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2022-01-18 06:54:08,310 INFO L87 Difference]: Start difference. First operand 699 states and 2312 transitions. Second operand has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:54:08,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:54:08,823 INFO L93 Difference]: Finished difference Result 2256 states and 6789 transitions. [2022-01-18 06:54:08,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-01-18 06:54:08,823 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-18 06:54:08,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:54:08,830 INFO L225 Difference]: With dead ends: 2256 [2022-01-18 06:54:08,830 INFO L226 Difference]: Without dead ends: 2256 [2022-01-18 06:54:08,831 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 41 SyntacticMatches, 2 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 826 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=584, Invalid=2068, Unknown=0, NotChecked=0, Total=2652 [2022-01-18 06:54:08,831 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 224 mSDsluCounter, 305 mSDsCounter, 0 mSdLazyCounter, 666 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 224 SdHoareTripleChecker+Valid, 199 SdHoareTripleChecker+Invalid, 718 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 666 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 06:54:08,832 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [224 Valid, 199 Invalid, 718 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 666 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 06:54:08,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2256 states. [2022-01-18 06:54:08,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2256 to 775. [2022-01-18 06:54:08,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 775 states, 774 states have (on average 3.289405684754522) internal successors, (2546), 774 states have internal predecessors, (2546), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:54:08,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 775 states to 775 states and 2546 transitions. [2022-01-18 06:54:08,865 INFO L78 Accepts]: Start accepts. Automaton has 775 states and 2546 transitions. Word has length 24 [2022-01-18 06:54:08,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:54:08,866 INFO L470 AbstractCegarLoop]: Abstraction has 775 states and 2546 transitions. [2022-01-18 06:54:08,866 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:54:08,866 INFO L276 IsEmpty]: Start isEmpty. Operand 775 states and 2546 transitions. [2022-01-18 06:54:08,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 06:54:08,868 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:54:08,868 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:54:08,884 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-01-18 06:54:09,084 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:54:09,084 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 06:54:09,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:54:09,085 INFO L85 PathProgramCache]: Analyzing trace with hash -1966730932, now seen corresponding path program 13 times [2022-01-18 06:54:09,085 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:54:09,085 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [790762991] [2022-01-18 06:54:09,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:54:09,085 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:54:09,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:54:09,124 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:54:09,124 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:54:09,124 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [790762991] [2022-01-18 06:54:09,124 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [790762991] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:54:09,124 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1312370704] [2022-01-18 06:54:09,124 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 06:54:09,124 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:54:09,125 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:54:09,148 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 06:54:09,149 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-01-18 06:54:09,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:54:09,174 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-18 06:54:09,175 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:54:09,262 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:54:09,263 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:54:09,301 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:54:09,302 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1312370704] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:54:09,302 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:54:09,302 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 13 [2022-01-18 06:54:09,302 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [386800145] [2022-01-18 06:54:09,302 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:54:09,302 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-01-18 06:54:09,302 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:54:09,302 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-01-18 06:54:09,303 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2022-01-18 06:54:09,303 INFO L87 Difference]: Start difference. First operand 775 states and 2546 transitions. Second operand has 14 states, 14 states have (on average 3.142857142857143) 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) [2022-01-18 06:54:09,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:54:09,601 INFO L93 Difference]: Finished difference Result 1611 states and 5005 transitions. [2022-01-18 06:54:09,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-01-18 06:54:09,601 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.142857142857143) 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 24 [2022-01-18 06:54:09,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:54:09,618 INFO L225 Difference]: With dead ends: 1611 [2022-01-18 06:54:09,618 INFO L226 Difference]: Without dead ends: 1611 [2022-01-18 06:54:09,618 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=219, Invalid=537, Unknown=0, NotChecked=0, Total=756 [2022-01-18 06:54:09,619 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 249 mSDsluCounter, 201 mSDsCounter, 0 mSdLazyCounter, 324 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 249 SdHoareTripleChecker+Valid, 114 SdHoareTripleChecker+Invalid, 351 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 324 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 06:54:09,619 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [249 Valid, 114 Invalid, 351 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 324 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 06:54:09,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1611 states. [2022-01-18 06:54:09,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1611 to 926. [2022-01-18 06:54:09,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 926 states, 925 states have (on average 3.370810810810811) internal successors, (3118), 925 states have internal predecessors, (3118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:54:09,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 926 states to 926 states and 3118 transitions. [2022-01-18 06:54:09,644 INFO L78 Accepts]: Start accepts. Automaton has 926 states and 3118 transitions. Word has length 24 [2022-01-18 06:54:09,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:54:09,644 INFO L470 AbstractCegarLoop]: Abstraction has 926 states and 3118 transitions. [2022-01-18 06:54:09,644 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.142857142857143) 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) [2022-01-18 06:54:09,644 INFO L276 IsEmpty]: Start isEmpty. Operand 926 states and 3118 transitions. [2022-01-18 06:54:09,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 06:54:09,646 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:54:09,646 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:54:09,662 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-01-18 06:54:09,859 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-01-18 06:54:09,859 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 06:54:09,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:54:09,860 INFO L85 PathProgramCache]: Analyzing trace with hash 1895359760, now seen corresponding path program 14 times [2022-01-18 06:54:09,860 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:54:09,860 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1013228661] [2022-01-18 06:54:09,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:54:09,860 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:54:09,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:54:09,904 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:54:09,904 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:54:09,904 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1013228661] [2022-01-18 06:54:09,904 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1013228661] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:54:09,904 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [288878716] [2022-01-18 06:54:09,904 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 06:54:09,904 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:54:09,905 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:54:09,905 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 06:54:09,907 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-01-18 06:54:09,930 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 06:54:09,930 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:54:09,930 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-18 06:54:09,931 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:54:10,011 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:54:10,011 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:54:10,089 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:54:10,090 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [288878716] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:54:10,090 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:54:10,090 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 13 [2022-01-18 06:54:10,090 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1912273363] [2022-01-18 06:54:10,090 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:54:10,091 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-01-18 06:54:10,091 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:54:10,091 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-01-18 06:54:10,091 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2022-01-18 06:54:10,091 INFO L87 Difference]: Start difference. First operand 926 states and 3118 transitions. Second operand has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:54:10,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:54:10,617 INFO L93 Difference]: Finished difference Result 2408 states and 7521 transitions. [2022-01-18 06:54:10,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-01-18 06:54:10,617 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-18 06:54:10,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:54:10,623 INFO L225 Difference]: With dead ends: 2408 [2022-01-18 06:54:10,623 INFO L226 Difference]: Without dead ends: 2404 [2022-01-18 06:54:10,624 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 42 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 512 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=453, Invalid=1439, Unknown=0, NotChecked=0, Total=1892 [2022-01-18 06:54:10,624 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 347 mSDsluCounter, 206 mSDsCounter, 0 mSdLazyCounter, 470 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 347 SdHoareTripleChecker+Valid, 136 SdHoareTripleChecker+Invalid, 546 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 470 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 06:54:10,625 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [347 Valid, 136 Invalid, 546 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 470 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 06:54:10,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2404 states. [2022-01-18 06:54:10,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2404 to 934. [2022-01-18 06:54:10,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 934 states, 933 states have (on average 3.356913183279743) internal successors, (3132), 933 states have internal predecessors, (3132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:54:10,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 934 states to 934 states and 3132 transitions. [2022-01-18 06:54:10,659 INFO L78 Accepts]: Start accepts. Automaton has 934 states and 3132 transitions. Word has length 24 [2022-01-18 06:54:10,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:54:10,659 INFO L470 AbstractCegarLoop]: Abstraction has 934 states and 3132 transitions. [2022-01-18 06:54:10,659 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:54:10,660 INFO L276 IsEmpty]: Start isEmpty. Operand 934 states and 3132 transitions. [2022-01-18 06:54:10,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 06:54:10,662 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:54:10,662 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:54:10,679 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-01-18 06:54:10,878 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:54:10,879 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 06:54:10,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:54:10,879 INFO L85 PathProgramCache]: Analyzing trace with hash 2029990096, now seen corresponding path program 15 times [2022-01-18 06:54:10,879 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:54:10,879 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1020017701] [2022-01-18 06:54:10,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:54:10,879 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:54:10,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:54:10,919 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:54:10,920 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:54:10,920 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1020017701] [2022-01-18 06:54:10,920 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1020017701] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:54:10,920 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1199438436] [2022-01-18 06:54:10,920 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 06:54:10,920 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:54:10,920 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:54:10,921 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 06:54:10,922 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-01-18 06:54:10,946 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-01-18 06:54:10,947 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:54:10,948 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-18 06:54:10,951 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:54:11,021 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:54:11,022 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:54:11,084 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:54:11,084 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1199438436] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:54:11,084 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:54:11,084 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 16 [2022-01-18 06:54:11,084 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1829661759] [2022-01-18 06:54:11,084 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:54:11,084 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-18 06:54:11,085 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:54:11,085 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-18 06:54:11,085 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2022-01-18 06:54:11,085 INFO L87 Difference]: Start difference. First operand 934 states and 3132 transitions. Second operand has 16 states, 16 states have (on average 2.8125) internal successors, (45), 16 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:54:11,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:54:11,919 INFO L93 Difference]: Finished difference Result 3509 states and 10311 transitions. [2022-01-18 06:54:11,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2022-01-18 06:54:11,919 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.8125) internal successors, (45), 16 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 [2022-01-18 06:54:11,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:54:11,926 INFO L225 Difference]: With dead ends: 3509 [2022-01-18 06:54:11,926 INFO L226 Difference]: Without dead ends: 3509 [2022-01-18 06:54:11,927 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 38 SyntacticMatches, 2 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1536 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=1091, Invalid=3199, Unknown=0, NotChecked=0, Total=4290 [2022-01-18 06:54:11,929 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 382 mSDsluCounter, 476 mSDsCounter, 0 mSdLazyCounter, 884 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 382 SdHoareTripleChecker+Valid, 293 SdHoareTripleChecker+Invalid, 948 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 884 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 06:54:11,929 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [382 Valid, 293 Invalid, 948 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 884 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-18 06:54:11,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3509 states. [2022-01-18 06:54:11,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3509 to 985. [2022-01-18 06:54:11,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 985 states, 984 states have (on average 3.399390243902439) internal successors, (3345), 984 states have internal predecessors, (3345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:54:11,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 985 states to 985 states and 3345 transitions. [2022-01-18 06:54:11,965 INFO L78 Accepts]: Start accepts. Automaton has 985 states and 3345 transitions. Word has length 24 [2022-01-18 06:54:11,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:54:11,966 INFO L470 AbstractCegarLoop]: Abstraction has 985 states and 3345 transitions. [2022-01-18 06:54:11,966 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.8125) internal successors, (45), 16 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:54:11,966 INFO L276 IsEmpty]: Start isEmpty. Operand 985 states and 3345 transitions. [2022-01-18 06:54:11,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 06:54:11,968 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:54:11,968 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:54:11,984 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-01-18 06:54:12,183 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:54:12,184 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 06:54:12,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:54:12,184 INFO L85 PathProgramCache]: Analyzing trace with hash -621938046, now seen corresponding path program 16 times [2022-01-18 06:54:12,184 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:54:12,184 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1967130183] [2022-01-18 06:54:12,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:54:12,185 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:54:12,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:54:12,247 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:54:12,247 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:54:12,247 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1967130183] [2022-01-18 06:54:12,247 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1967130183] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:54:12,247 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [624801701] [2022-01-18 06:54:12,247 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 06:54:12,247 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:54:12,247 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:54:12,248 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 06:54:12,279 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-01-18 06:54:12,284 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 06:54:12,284 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:54:12,284 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-18 06:54:12,285 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:54:12,356 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:54:12,356 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:54:12,423 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:54:12,423 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [624801701] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:54:12,423 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:54:12,423 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 16 [2022-01-18 06:54:12,423 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1027993391] [2022-01-18 06:54:12,423 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:54:12,424 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-18 06:54:12,424 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:54:12,424 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-18 06:54:12,424 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2022-01-18 06:54:12,424 INFO L87 Difference]: Start difference. First operand 985 states and 3345 transitions. Second operand has 16 states, 16 states have (on average 2.8125) internal successors, (45), 16 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:54:13,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:54:13,573 INFO L93 Difference]: Finished difference Result 3211 states and 9686 transitions. [2022-01-18 06:54:13,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2022-01-18 06:54:13,574 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.8125) internal successors, (45), 16 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 [2022-01-18 06:54:13,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:54:13,582 INFO L225 Difference]: With dead ends: 3211 [2022-01-18 06:54:13,582 INFO L226 Difference]: Without dead ends: 3207 [2022-01-18 06:54:13,584 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2478 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1498, Invalid=5144, Unknown=0, NotChecked=0, Total=6642 [2022-01-18 06:54:13,585 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 430 mSDsluCounter, 421 mSDsCounter, 0 mSdLazyCounter, 968 mSolverCounterSat, 92 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 430 SdHoareTripleChecker+Valid, 280 SdHoareTripleChecker+Invalid, 1060 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 92 IncrementalHoareTripleChecker+Valid, 968 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 06:54:13,585 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [430 Valid, 280 Invalid, 1060 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [92 Valid, 968 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-18 06:54:13,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3207 states. [2022-01-18 06:54:13,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3207 to 985. [2022-01-18 06:54:13,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 985 states, 984 states have (on average 3.397357723577236) internal successors, (3343), 984 states have internal predecessors, (3343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:54:13,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 985 states to 985 states and 3343 transitions. [2022-01-18 06:54:13,620 INFO L78 Accepts]: Start accepts. Automaton has 985 states and 3343 transitions. Word has length 24 [2022-01-18 06:54:13,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:54:13,620 INFO L470 AbstractCegarLoop]: Abstraction has 985 states and 3343 transitions. [2022-01-18 06:54:13,620 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.8125) internal successors, (45), 16 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:54:13,620 INFO L276 IsEmpty]: Start isEmpty. Operand 985 states and 3343 transitions. [2022-01-18 06:54:13,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 06:54:13,622 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:54:13,622 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] [2022-01-18 06:54:13,640 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-01-18 06:54:13,835 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:54:13,835 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 06:54:13,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:54:13,836 INFO L85 PathProgramCache]: Analyzing trace with hash -1534223598, now seen corresponding path program 3 times [2022-01-18 06:54:13,836 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:54:13,836 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [449313895] [2022-01-18 06:54:13,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:54:13,836 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:54:13,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:54:13,865 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 06:54:13,865 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:54:13,866 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [449313895] [2022-01-18 06:54:13,866 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [449313895] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:54:13,866 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2035868036] [2022-01-18 06:54:13,866 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 06:54:13,866 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:54:13,866 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:54:13,867 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 06:54:13,868 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-01-18 06:54:13,888 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-01-18 06:54:13,888 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:54:13,888 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 5 conjunts are in the unsatisfiable core [2022-01-18 06:54:13,889 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:54:13,950 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 06:54:13,950 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:54:14,012 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 06:54:14,012 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2035868036] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:54:14,012 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:54:14,012 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 9 [2022-01-18 06:54:14,012 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [3672870] [2022-01-18 06:54:14,012 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:54:14,015 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-01-18 06:54:14,015 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:54:14,015 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-01-18 06:54:14,015 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2022-01-18 06:54:14,015 INFO L87 Difference]: Start difference. First operand 985 states and 3343 transitions. Second operand has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 9 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:54:14,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:54:14,135 INFO L93 Difference]: Finished difference Result 1333 states and 4297 transitions. [2022-01-18 06:54:14,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-18 06:54:14,135 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 9 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-18 06:54:14,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:54:14,138 INFO L225 Difference]: With dead ends: 1333 [2022-01-18 06:54:14,138 INFO L226 Difference]: Without dead ends: 1333 [2022-01-18 06:54:14,138 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 41 SyntacticMatches, 4 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=76, Invalid=134, Unknown=0, NotChecked=0, Total=210 [2022-01-18 06:54:14,138 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 100 mSDsluCounter, 81 mSDsCounter, 0 mSdLazyCounter, 154 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 165 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 154 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 06:54:14,139 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [100 Valid, 51 Invalid, 165 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 154 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 06:54:14,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1333 states. [2022-01-18 06:54:14,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1333 to 937. [2022-01-18 06:54:14,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 937 states, 936 states have (on average 3.378205128205128) internal successors, (3162), 936 states have internal predecessors, (3162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:54:14,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 937 states to 937 states and 3162 transitions. [2022-01-18 06:54:14,171 INFO L78 Accepts]: Start accepts. Automaton has 937 states and 3162 transitions. Word has length 24 [2022-01-18 06:54:14,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:54:14,171 INFO L470 AbstractCegarLoop]: Abstraction has 937 states and 3162 transitions. [2022-01-18 06:54:14,171 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 9 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:54:14,171 INFO L276 IsEmpty]: Start isEmpty. Operand 937 states and 3162 transitions. [2022-01-18 06:54:14,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 06:54:14,173 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:54:14,173 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:54:14,192 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-01-18 06:54:14,387 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:54:14,387 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 06:54:14,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:54:14,388 INFO L85 PathProgramCache]: Analyzing trace with hash -604023854, now seen corresponding path program 17 times [2022-01-18 06:54:14,388 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:54:14,388 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1144562794] [2022-01-18 06:54:14,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:54:14,388 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:54:14,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:54:14,420 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:54:14,421 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:54:14,421 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1144562794] [2022-01-18 06:54:14,421 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1144562794] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:54:14,421 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [959808919] [2022-01-18 06:54:14,421 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 06:54:14,421 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:54:14,421 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:54:14,436 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 06:54:14,437 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-01-18 06:54:14,458 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 06:54:14,459 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:54:14,459 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-18 06:54:14,459 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:54:14,510 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:54:14,511 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:54:14,551 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:54:14,551 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [959808919] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:54:14,551 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:54:14,551 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 11 [2022-01-18 06:54:14,552 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [896698861] [2022-01-18 06:54:14,552 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:54:14,552 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-01-18 06:54:14,552 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:54:14,552 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-01-18 06:54:14,552 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2022-01-18 06:54:14,552 INFO L87 Difference]: Start difference. First operand 937 states and 3162 transitions. Second operand has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:54:14,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:54:14,858 INFO L93 Difference]: Finished difference Result 2129 states and 6669 transitions. [2022-01-18 06:54:14,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-01-18 06:54:14,858 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-18 06:54:14,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:54:14,891 INFO L225 Difference]: With dead ends: 2129 [2022-01-18 06:54:14,891 INFO L226 Difference]: Without dead ends: 2129 [2022-01-18 06:54:14,892 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 43 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 289 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=282, Invalid=774, Unknown=0, NotChecked=0, Total=1056 [2022-01-18 06:54:14,893 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 161 mSDsluCounter, 262 mSDsCounter, 0 mSdLazyCounter, 459 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 161 SdHoareTripleChecker+Valid, 170 SdHoareTripleChecker+Invalid, 498 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 459 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 06:54:14,893 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [161 Valid, 170 Invalid, 498 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 459 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 06:54:14,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2129 states. [2022-01-18 06:54:14,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2129 to 1003. [2022-01-18 06:54:14,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1003 states, 1002 states have (on average 3.3642714570858283) internal successors, (3371), 1002 states have internal predecessors, (3371), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:54:14,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1003 states to 1003 states and 3371 transitions. [2022-01-18 06:54:14,952 INFO L78 Accepts]: Start accepts. Automaton has 1003 states and 3371 transitions. Word has length 24 [2022-01-18 06:54:14,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:54:14,952 INFO L470 AbstractCegarLoop]: Abstraction has 1003 states and 3371 transitions. [2022-01-18 06:54:14,952 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:54:14,952 INFO L276 IsEmpty]: Start isEmpty. Operand 1003 states and 3371 transitions. [2022-01-18 06:54:14,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 06:54:14,954 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:54:14,954 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:54:14,970 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-01-18 06:54:15,170 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,SelfDestructingSolverStorable22 [2022-01-18 06:54:15,170 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 06:54:15,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:54:15,170 INFO L85 PathProgramCache]: Analyzing trace with hash 1298655598, now seen corresponding path program 18 times [2022-01-18 06:54:15,171 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:54:15,171 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [931457531] [2022-01-18 06:54:15,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:54:15,171 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:54:15,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:54:15,198 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:54:15,198 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:54:15,199 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [931457531] [2022-01-18 06:54:15,199 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [931457531] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:54:15,200 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2143722646] [2022-01-18 06:54:15,200 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 06:54:15,200 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:54:15,200 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:54:15,208 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 06:54:15,209 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-01-18 06:54:15,233 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 06:54:15,233 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:54:15,233 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-18 06:54:15,234 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:54:15,275 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:54:15,276 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:54:15,314 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:54:15,314 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2143722646] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:54:15,314 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:54:15,314 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 10 [2022-01-18 06:54:15,314 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1681984937] [2022-01-18 06:54:15,314 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:54:15,314 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-01-18 06:54:15,315 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:54:15,315 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-01-18 06:54:15,315 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2022-01-18 06:54:15,315 INFO L87 Difference]: Start difference. First operand 1003 states and 3371 transitions. Second operand has 10 states, 10 states have (on average 3.7) internal successors, (37), 10 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:54:15,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:54:15,560 INFO L93 Difference]: Finished difference Result 2262 states and 7067 transitions. [2022-01-18 06:54:15,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-01-18 06:54:15,561 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.7) internal successors, (37), 10 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-18 06:54:15,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:54:15,566 INFO L225 Difference]: With dead ends: 2262 [2022-01-18 06:54:15,566 INFO L226 Difference]: Without dead ends: 2262 [2022-01-18 06:54:15,567 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 44 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 346 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=297, Invalid=893, Unknown=0, NotChecked=0, Total=1190 [2022-01-18 06:54:15,567 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 196 mSDsluCounter, 144 mSDsCounter, 0 mSdLazyCounter, 265 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 196 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 302 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 265 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 06:54:15,567 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [196 Valid, 105 Invalid, 302 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 265 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 06:54:15,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2262 states. [2022-01-18 06:54:15,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2262 to 1073. [2022-01-18 06:54:15,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1073 states, 1072 states have (on average 3.3563432835820897) internal successors, (3598), 1072 states have internal predecessors, (3598), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:54:15,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1073 states to 1073 states and 3598 transitions. [2022-01-18 06:54:15,602 INFO L78 Accepts]: Start accepts. Automaton has 1073 states and 3598 transitions. Word has length 24 [2022-01-18 06:54:15,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:54:15,603 INFO L470 AbstractCegarLoop]: Abstraction has 1073 states and 3598 transitions. [2022-01-18 06:54:15,603 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.7) internal successors, (37), 10 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:54:15,603 INFO L276 IsEmpty]: Start isEmpty. Operand 1073 states and 3598 transitions. [2022-01-18 06:54:15,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 06:54:15,605 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:54:15,606 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:54:15,631 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-01-18 06:54:15,823 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,SelfDestructingSolverStorable23 [2022-01-18 06:54:15,823 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 06:54:15,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:54:15,824 INFO L85 PathProgramCache]: Analyzing trace with hash 215632942, now seen corresponding path program 19 times [2022-01-18 06:54:15,824 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:54:15,824 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [583975183] [2022-01-18 06:54:15,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:54:15,824 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:54:15,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:54:15,858 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:54:15,858 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:54:15,858 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [583975183] [2022-01-18 06:54:15,859 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [583975183] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:54:15,859 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1346836915] [2022-01-18 06:54:15,859 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 06:54:15,859 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:54:15,859 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:54:15,860 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 06:54:15,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:54:15,888 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-18 06:54:15,889 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:54:15,890 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-01-18 06:54:15,989 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:54:15,989 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:54:16,041 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 06:54:16,041 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1346836915] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:54:16,041 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:54:16,041 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 14 [2022-01-18 06:54:16,041 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [527953550] [2022-01-18 06:54:16,041 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:54:16,041 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-01-18 06:54:16,041 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:54:16,041 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-01-18 06:54:16,042 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2022-01-18 06:54:16,046 INFO L87 Difference]: Start difference. First operand 1073 states and 3598 transitions. Second operand has 15 states, 15 states have (on average 3.4) internal successors, (51), 14 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) [2022-01-18 06:54:16,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:54:16,312 INFO L93 Difference]: Finished difference Result 1474 states and 4766 transitions. [2022-01-18 06:54:16,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-01-18 06:54:16,313 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.4) internal successors, (51), 14 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 24 [2022-01-18 06:54:16,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:54:16,315 INFO L225 Difference]: With dead ends: 1474 [2022-01-18 06:54:16,315 INFO L226 Difference]: Without dead ends: 1464 [2022-01-18 06:54:16,316 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=184, Invalid=572, Unknown=0, NotChecked=0, Total=756 [2022-01-18 06:54:16,316 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 167 mSDsluCounter, 215 mSDsCounter, 0 mSdLazyCounter, 394 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 167 SdHoareTripleChecker+Valid, 119 SdHoareTripleChecker+Invalid, 409 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 394 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 06:54:16,316 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [167 Valid, 119 Invalid, 409 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 394 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 06:54:16,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1464 states. [2022-01-18 06:54:16,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1464 to 1140. [2022-01-18 06:54:16,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1140 states, 1139 states have (on average 3.395961369622476) internal successors, (3868), 1139 states have internal predecessors, (3868), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:54:16,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1140 states to 1140 states and 3868 transitions. [2022-01-18 06:54:16,363 INFO L78 Accepts]: Start accepts. Automaton has 1140 states and 3868 transitions. Word has length 24 [2022-01-18 06:54:16,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:54:16,363 INFO L470 AbstractCegarLoop]: Abstraction has 1140 states and 3868 transitions. [2022-01-18 06:54:16,363 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.4) internal successors, (51), 14 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) [2022-01-18 06:54:16,363 INFO L276 IsEmpty]: Start isEmpty. Operand 1140 states and 3868 transitions. [2022-01-18 06:54:16,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 06:54:16,365 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:54:16,365 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:54:16,383 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-01-18 06:54:16,576 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:54:16,577 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 06:54:16,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:54:16,577 INFO L85 PathProgramCache]: Analyzing trace with hash 1253834456, now seen corresponding path program 20 times [2022-01-18 06:54:16,577 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:54:16,577 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1882522197] [2022-01-18 06:54:16,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:54:16,577 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:54:16,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:54:16,606 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 06:54:16,606 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:54:16,607 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1882522197] [2022-01-18 06:54:16,607 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1882522197] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:54:16,607 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1634010577] [2022-01-18 06:54:16,607 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 06:54:16,607 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:54:16,607 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:54:16,608 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 06:54:16,609 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-01-18 06:54:16,630 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 06:54:16,630 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:54:16,630 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-18 06:54:16,631 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:54:16,698 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 06:54:16,698 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:54:16,764 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 06:54:16,765 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1634010577] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:54:16,773 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:54:16,773 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 10 [2022-01-18 06:54:16,773 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1835208870] [2022-01-18 06:54:16,773 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:54:16,773 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-01-18 06:54:16,773 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:54:16,774 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-01-18 06:54:16,774 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2022-01-18 06:54:16,774 INFO L87 Difference]: Start difference. First operand 1140 states and 3868 transitions. Second operand has 10 states, 10 states have (on average 3.7) internal successors, (37), 10 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:54:17,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:54:17,057 INFO L93 Difference]: Finished difference Result 2318 states and 7414 transitions. [2022-01-18 06:54:17,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-01-18 06:54:17,057 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.7) internal successors, (37), 10 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-18 06:54:17,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:54:17,073 INFO L225 Difference]: With dead ends: 2318 [2022-01-18 06:54:17,073 INFO L226 Difference]: Without dead ends: 2314 [2022-01-18 06:54:17,073 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 45 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 178 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=190, Invalid=566, Unknown=0, NotChecked=0, Total=756 [2022-01-18 06:54:17,074 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 213 mSDsluCounter, 139 mSDsCounter, 0 mSdLazyCounter, 272 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 213 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 307 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 272 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 06:54:17,075 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [213 Valid, 96 Invalid, 307 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 272 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 06:54:17,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2314 states. [2022-01-18 06:54:17,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2314 to 1140. [2022-01-18 06:54:17,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1140 states, 1139 states have (on average 3.394205443371378) internal successors, (3866), 1139 states have internal predecessors, (3866), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:54:17,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1140 states to 1140 states and 3866 transitions. [2022-01-18 06:54:17,125 INFO L78 Accepts]: Start accepts. Automaton has 1140 states and 3866 transitions. Word has length 24 [2022-01-18 06:54:17,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:54:17,125 INFO L470 AbstractCegarLoop]: Abstraction has 1140 states and 3866 transitions. [2022-01-18 06:54:17,125 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.7) internal successors, (37), 10 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:54:17,125 INFO L276 IsEmpty]: Start isEmpty. Operand 1140 states and 3866 transitions. [2022-01-18 06:54:17,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 06:54:17,127 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:54:17,127 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:54:17,146 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-01-18 06:54:17,343 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:54:17,344 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 06:54:17,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:54:17,344 INFO L85 PathProgramCache]: Analyzing trace with hash 1851171114, now seen corresponding path program 21 times [2022-01-18 06:54:17,344 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:54:17,344 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1735653404] [2022-01-18 06:54:17,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:54:17,344 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:54:17,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:54:17,389 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:54:17,389 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:54:17,389 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1735653404] [2022-01-18 06:54:17,389 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1735653404] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:54:17,389 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1019843782] [2022-01-18 06:54:17,389 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 06:54:17,390 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:54:17,390 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:54:17,391 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 06:54:17,391 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-01-18 06:54:17,410 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 06:54:17,411 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:54:17,411 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-18 06:54:17,411 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:54:17,465 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:54:17,465 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:54:17,523 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:54:17,523 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1019843782] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:54:17,523 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:54:17,523 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 11 [2022-01-18 06:54:17,523 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [568721769] [2022-01-18 06:54:17,523 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:54:17,523 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-01-18 06:54:17,523 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:54:17,524 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-01-18 06:54:17,524 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2022-01-18 06:54:17,524 INFO L87 Difference]: Start difference. First operand 1140 states and 3866 transitions. Second operand has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:54:17,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:54:17,827 INFO L93 Difference]: Finished difference Result 2302 states and 7376 transitions. [2022-01-18 06:54:17,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-01-18 06:54:17,828 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-18 06:54:17,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:54:17,831 INFO L225 Difference]: With dead ends: 2302 [2022-01-18 06:54:17,831 INFO L226 Difference]: Without dead ends: 2290 [2022-01-18 06:54:17,832 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 44 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 228 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=223, Invalid=707, Unknown=0, NotChecked=0, Total=930 [2022-01-18 06:54:17,832 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 164 mSDsluCounter, 234 mSDsCounter, 0 mSdLazyCounter, 410 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 164 SdHoareTripleChecker+Valid, 163 SdHoareTripleChecker+Invalid, 440 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 410 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 06:54:17,832 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [164 Valid, 163 Invalid, 440 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 410 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 06:54:17,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2290 states. [2022-01-18 06:54:17,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2290 to 1148. [2022-01-18 06:54:17,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1148 states, 1147 states have (on average 3.3844812554489976) internal successors, (3882), 1147 states have internal predecessors, (3882), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:54:17,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1148 states to 1148 states and 3882 transitions. [2022-01-18 06:54:17,853 INFO L78 Accepts]: Start accepts. Automaton has 1148 states and 3882 transitions. Word has length 24 [2022-01-18 06:54:17,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:54:17,853 INFO L470 AbstractCegarLoop]: Abstraction has 1148 states and 3882 transitions. [2022-01-18 06:54:17,853 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:54:17,853 INFO L276 IsEmpty]: Start isEmpty. Operand 1148 states and 3882 transitions. [2022-01-18 06:54:17,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 06:54:17,855 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:54:17,855 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:54:17,889 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-01-18 06:54:18,070 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-01-18 06:54:18,070 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 06:54:18,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:54:18,070 INFO L85 PathProgramCache]: Analyzing trace with hash 1324750830, now seen corresponding path program 22 times [2022-01-18 06:54:18,070 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:54:18,071 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1750880600] [2022-01-18 06:54:18,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:54:18,071 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:54:18,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:54:18,109 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:54:18,109 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:54:18,109 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1750880600] [2022-01-18 06:54:18,109 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1750880600] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:54:18,109 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [960263325] [2022-01-18 06:54:18,109 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 06:54:18,109 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:54:18,109 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:54:18,110 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 06:54:18,111 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-01-18 06:54:18,129 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 06:54:18,130 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:54:18,130 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-18 06:54:18,130 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:54:18,230 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:54:18,231 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:54:18,315 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 06:54:18,315 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [960263325] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:54:18,315 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:54:18,315 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 16 [2022-01-18 06:54:18,315 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1132505372] [2022-01-18 06:54:18,315 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:54:18,316 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-18 06:54:18,316 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:54:18,316 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-18 06:54:18,316 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=179, Unknown=0, NotChecked=0, Total=240 [2022-01-18 06:54:18,316 INFO L87 Difference]: Start difference. First operand 1148 states and 3882 transitions. Second operand has 16 states, 16 states have (on average 3.3125) internal successors, (53), 16 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) [2022-01-18 06:54:19,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:54:19,184 INFO L93 Difference]: Finished difference Result 4760 states and 15112 transitions. [2022-01-18 06:54:19,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2022-01-18 06:54:19,184 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 16 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 24 [2022-01-18 06:54:19,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:54:19,195 INFO L225 Difference]: With dead ends: 4760 [2022-01-18 06:54:19,195 INFO L226 Difference]: Without dead ends: 4760 [2022-01-18 06:54:19,196 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 38 SyntacticMatches, 2 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1242 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=926, Invalid=2734, Unknown=0, NotChecked=0, Total=3660 [2022-01-18 06:54:19,197 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 475 mSDsluCounter, 367 mSDsCounter, 0 mSdLazyCounter, 713 mSolverCounterSat, 87 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 475 SdHoareTripleChecker+Valid, 213 SdHoareTripleChecker+Invalid, 800 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 87 IncrementalHoareTripleChecker+Valid, 713 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 06:54:19,197 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [475 Valid, 213 Invalid, 800 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [87 Valid, 713 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 06:54:19,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4760 states. [2022-01-18 06:54:19,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4760 to 1429. [2022-01-18 06:54:19,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1429 states, 1428 states have (on average 3.589635854341737) internal successors, (5126), 1428 states have internal predecessors, (5126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:54:19,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1429 states to 1429 states and 5126 transitions. [2022-01-18 06:54:19,245 INFO L78 Accepts]: Start accepts. Automaton has 1429 states and 5126 transitions. Word has length 24 [2022-01-18 06:54:19,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:54:19,245 INFO L470 AbstractCegarLoop]: Abstraction has 1429 states and 5126 transitions. [2022-01-18 06:54:19,245 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 16 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) [2022-01-18 06:54:19,245 INFO L276 IsEmpty]: Start isEmpty. Operand 1429 states and 5126 transitions. [2022-01-18 06:54:19,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 06:54:19,248 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:54:19,248 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:54:19,264 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2022-01-18 06:54:19,453 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,SelfDestructingSolverStorable27 [2022-01-18 06:54:19,453 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 06:54:19,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:54:19,453 INFO L85 PathProgramCache]: Analyzing trace with hash 1891702910, now seen corresponding path program 23 times [2022-01-18 06:54:19,453 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:54:19,453 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [907756407] [2022-01-18 06:54:19,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:54:19,454 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:54:19,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:54:19,494 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:54:19,494 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:54:19,494 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [907756407] [2022-01-18 06:54:19,494 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [907756407] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:54:19,494 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1180180790] [2022-01-18 06:54:19,494 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 06:54:19,494 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:54:19,494 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:54:19,495 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 06:54:19,496 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-01-18 06:54:19,515 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 06:54:19,515 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:54:19,515 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-18 06:54:19,516 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:54:19,610 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:54:19,610 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:54:19,690 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 06:54:19,690 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1180180790] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:54:19,690 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:54:19,690 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 16 [2022-01-18 06:54:19,691 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1028802108] [2022-01-18 06:54:19,691 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:54:19,691 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-18 06:54:19,691 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:54:19,692 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-18 06:54:19,692 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=177, Unknown=0, NotChecked=0, Total=240 [2022-01-18 06:54:19,692 INFO L87 Difference]: Start difference. First operand 1429 states and 5126 transitions. Second operand has 16 states, 16 states have (on average 3.3125) internal successors, (53), 16 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) [2022-01-18 06:54:20,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:54:20,266 INFO L93 Difference]: Finished difference Result 4260 states and 13532 transitions. [2022-01-18 06:54:20,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-01-18 06:54:20,267 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 16 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 24 [2022-01-18 06:54:20,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:54:20,273 INFO L225 Difference]: With dead ends: 4260 [2022-01-18 06:54:20,274 INFO L226 Difference]: Without dead ends: 4260 [2022-01-18 06:54:20,274 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 38 SyntacticMatches, 2 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1045 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=860, Invalid=2220, Unknown=0, NotChecked=0, Total=3080 [2022-01-18 06:54:20,275 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 485 mSDsluCounter, 325 mSDsCounter, 0 mSdLazyCounter, 593 mSolverCounterSat, 80 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 485 SdHoareTripleChecker+Valid, 183 SdHoareTripleChecker+Invalid, 673 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 80 IncrementalHoareTripleChecker+Valid, 593 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 06:54:20,275 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [485 Valid, 183 Invalid, 673 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [80 Valid, 593 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 06:54:20,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4260 states. [2022-01-18 06:54:20,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4260 to 1426. [2022-01-18 06:54:20,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1426 states, 1425 states have (on average 3.5873684210526315) internal successors, (5112), 1425 states have internal predecessors, (5112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:54:20,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1426 states to 1426 states and 5112 transitions. [2022-01-18 06:54:20,309 INFO L78 Accepts]: Start accepts. Automaton has 1426 states and 5112 transitions. Word has length 24 [2022-01-18 06:54:20,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:54:20,309 INFO L470 AbstractCegarLoop]: Abstraction has 1426 states and 5112 transitions. [2022-01-18 06:54:20,309 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 16 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) [2022-01-18 06:54:20,309 INFO L276 IsEmpty]: Start isEmpty. Operand 1426 states and 5112 transitions. [2022-01-18 06:54:20,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 06:54:20,312 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:54:20,312 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:54:20,327 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2022-01-18 06:54:20,527 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,SelfDestructingSolverStorable28 [2022-01-18 06:54:20,527 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 06:54:20,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:54:20,527 INFO L85 PathProgramCache]: Analyzing trace with hash 719357052, now seen corresponding path program 24 times [2022-01-18 06:54:20,527 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:54:20,527 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1235618034] [2022-01-18 06:54:20,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:54:20,527 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:54:20,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:54:20,584 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:54:20,584 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:54:20,585 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1235618034] [2022-01-18 06:54:20,585 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1235618034] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:54:20,585 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1318445217] [2022-01-18 06:54:20,586 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 06:54:20,586 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:54:20,586 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:54:20,587 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 06:54:20,588 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-01-18 06:54:20,619 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 06:54:20,620 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:54:20,621 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-18 06:54:20,622 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:54:20,701 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:54:20,701 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:54:20,767 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:54:20,767 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1318445217] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:54:20,767 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:54:20,768 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 14 [2022-01-18 06:54:20,768 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1989944083] [2022-01-18 06:54:20,768 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:54:20,768 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-01-18 06:54:20,768 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:54:20,768 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-01-18 06:54:20,768 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2022-01-18 06:54:20,769 INFO L87 Difference]: Start difference. First operand 1426 states and 5112 transitions. Second operand has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:54:21,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:54:21,422 INFO L93 Difference]: Finished difference Result 4602 states and 14473 transitions. [2022-01-18 06:54:21,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-01-18 06:54:21,423 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 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 24 [2022-01-18 06:54:21,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:54:21,429 INFO L225 Difference]: With dead ends: 4602 [2022-01-18 06:54:21,429 INFO L226 Difference]: Without dead ends: 4602 [2022-01-18 06:54:21,430 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 40 SyntacticMatches, 2 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 875 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=666, Invalid=1986, Unknown=0, NotChecked=0, Total=2652 [2022-01-18 06:54:21,430 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 335 mSDsluCounter, 283 mSDsCounter, 0 mSdLazyCounter, 528 mSolverCounterSat, 79 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 335 SdHoareTripleChecker+Valid, 177 SdHoareTripleChecker+Invalid, 607 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 79 IncrementalHoareTripleChecker+Valid, 528 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 06:54:21,430 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [335 Valid, 177 Invalid, 607 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [79 Valid, 528 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 06:54:21,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4602 states. [2022-01-18 06:54:21,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4602 to 1436. [2022-01-18 06:54:21,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1436 states, 1435 states have (on average 3.592334494773519) internal successors, (5155), 1435 states have internal predecessors, (5155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:54:21,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1436 states to 1436 states and 5155 transitions. [2022-01-18 06:54:21,521 INFO L78 Accepts]: Start accepts. Automaton has 1436 states and 5155 transitions. Word has length 24 [2022-01-18 06:54:21,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:54:21,521 INFO L470 AbstractCegarLoop]: Abstraction has 1436 states and 5155 transitions. [2022-01-18 06:54:21,521 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:54:21,521 INFO L276 IsEmpty]: Start isEmpty. Operand 1436 states and 5155 transitions. [2022-01-18 06:54:21,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 06:54:21,523 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:54:21,523 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:54:21,553 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2022-01-18 06:54:21,738 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:54:21,738 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 06:54:21,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:54:21,739 INFO L85 PathProgramCache]: Analyzing trace with hash 800733140, now seen corresponding path program 25 times [2022-01-18 06:54:21,739 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:54:21,739 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2115337807] [2022-01-18 06:54:21,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:54:21,739 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:54:21,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:54:21,773 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:54:21,773 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:54:21,773 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2115337807] [2022-01-18 06:54:21,773 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2115337807] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:54:21,773 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1876884852] [2022-01-18 06:54:21,773 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 06:54:21,773 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:54:21,774 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:54:21,781 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 06:54:21,782 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-01-18 06:54:21,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:54:21,801 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-18 06:54:21,801 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:54:21,840 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:54:21,840 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:54:21,878 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:54:21,878 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1876884852] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:54:21,878 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:54:21,878 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 14 [2022-01-18 06:54:21,878 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1669258091] [2022-01-18 06:54:21,878 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:54:21,878 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-01-18 06:54:21,878 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:54:21,884 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-01-18 06:54:21,884 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2022-01-18 06:54:21,884 INFO L87 Difference]: Start difference. First operand 1436 states and 5155 transitions. Second operand has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:54:22,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:54:22,254 INFO L93 Difference]: Finished difference Result 4348 states and 13871 transitions. [2022-01-18 06:54:22,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-01-18 06:54:22,254 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 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 24 [2022-01-18 06:54:22,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:54:22,260 INFO L225 Difference]: With dead ends: 4348 [2022-01-18 06:54:22,260 INFO L226 Difference]: Without dead ends: 4344 [2022-01-18 06:54:22,261 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 599 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=514, Invalid=1466, Unknown=0, NotChecked=0, Total=1980 [2022-01-18 06:54:22,263 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 386 mSDsluCounter, 289 mSDsCounter, 0 mSdLazyCounter, 597 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 386 SdHoareTripleChecker+Valid, 178 SdHoareTripleChecker+Invalid, 673 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 597 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 06:54:22,264 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [386 Valid, 178 Invalid, 673 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 597 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 06:54:22,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4344 states. [2022-01-18 06:54:22,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4344 to 1436. [2022-01-18 06:54:22,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1436 states, 1435 states have (on average 3.590940766550523) internal successors, (5153), 1435 states have internal predecessors, (5153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:54:22,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1436 states to 1436 states and 5153 transitions. [2022-01-18 06:54:22,305 INFO L78 Accepts]: Start accepts. Automaton has 1436 states and 5153 transitions. Word has length 24 [2022-01-18 06:54:22,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:54:22,305 INFO L470 AbstractCegarLoop]: Abstraction has 1436 states and 5153 transitions. [2022-01-18 06:54:22,305 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:54:22,305 INFO L276 IsEmpty]: Start isEmpty. Operand 1436 states and 5153 transitions. [2022-01-18 06:54:22,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 06:54:22,311 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:54:22,311 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:54:22,328 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2022-01-18 06:54:22,526 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:54:22,526 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 06:54:22,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:54:22,526 INFO L85 PathProgramCache]: Analyzing trace with hash 1731390356, now seen corresponding path program 26 times [2022-01-18 06:54:22,526 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:54:22,526 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [808820700] [2022-01-18 06:54:22,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:54:22,526 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:54:22,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:54:22,569 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:54:22,569 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:54:22,570 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [808820700] [2022-01-18 06:54:22,570 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [808820700] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:54:22,570 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1553418018] [2022-01-18 06:54:22,570 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 06:54:22,570 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:54:22,570 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:54:22,571 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 06:54:22,572 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-01-18 06:54:22,591 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 06:54:22,591 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:54:22,591 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-18 06:54:22,592 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:54:22,676 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:54:22,676 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:54:22,749 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 06:54:22,749 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1553418018] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:54:22,749 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:54:22,749 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 16 [2022-01-18 06:54:22,749 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [216324786] [2022-01-18 06:54:22,749 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:54:22,749 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-18 06:54:22,749 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:54:22,749 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-18 06:54:22,749 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=176, Unknown=0, NotChecked=0, Total=240 [2022-01-18 06:54:22,750 INFO L87 Difference]: Start difference. First operand 1436 states and 5153 transitions. Second operand has 16 states, 16 states have (on average 2.8125) internal successors, (45), 16 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:54:23,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:54:23,313 INFO L93 Difference]: Finished difference Result 4035 states and 12669 transitions. [2022-01-18 06:54:23,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-01-18 06:54:23,313 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.8125) internal successors, (45), 16 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 [2022-01-18 06:54:23,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:54:23,319 INFO L225 Difference]: With dead ends: 4035 [2022-01-18 06:54:23,319 INFO L226 Difference]: Without dead ends: 4035 [2022-01-18 06:54:23,320 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 38 SyntacticMatches, 2 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 715 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=640, Invalid=1616, Unknown=0, NotChecked=0, Total=2256 [2022-01-18 06:54:23,320 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 420 mSDsluCounter, 387 mSDsCounter, 0 mSdLazyCounter, 645 mSolverCounterSat, 79 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 420 SdHoareTripleChecker+Valid, 234 SdHoareTripleChecker+Invalid, 724 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 79 IncrementalHoareTripleChecker+Valid, 645 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 06:54:23,320 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [420 Valid, 234 Invalid, 724 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [79 Valid, 645 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 06:54:23,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4035 states. [2022-01-18 06:54:23,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4035 to 1442. [2022-01-18 06:54:23,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1442 states, 1441 states have (on average 3.5933379597501736) internal successors, (5178), 1441 states have internal predecessors, (5178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:54:23,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1442 states to 1442 states and 5178 transitions. [2022-01-18 06:54:23,355 INFO L78 Accepts]: Start accepts. Automaton has 1442 states and 5178 transitions. Word has length 24 [2022-01-18 06:54:23,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:54:23,355 INFO L470 AbstractCegarLoop]: Abstraction has 1442 states and 5178 transitions. [2022-01-18 06:54:23,356 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.8125) internal successors, (45), 16 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:54:23,356 INFO L276 IsEmpty]: Start isEmpty. Operand 1442 states and 5178 transitions. [2022-01-18 06:54:23,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 06:54:23,358 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:54:23,358 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:54:23,375 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2022-01-18 06:54:23,563 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:54:23,563 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 06:54:23,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:54:23,564 INFO L85 PathProgramCache]: Analyzing trace with hash -920537786, now seen corresponding path program 27 times [2022-01-18 06:54:23,564 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:54:23,564 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [509817031] [2022-01-18 06:54:23,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:54:23,564 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:54:23,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:54:23,606 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:54:23,606 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:54:23,606 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [509817031] [2022-01-18 06:54:23,606 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [509817031] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:54:23,606 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1426604315] [2022-01-18 06:54:23,606 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 06:54:23,606 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:54:23,606 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:54:23,607 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 06:54:23,608 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-01-18 06:54:23,627 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 06:54:23,627 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:54:23,628 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-18 06:54:23,628 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:54:23,679 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:54:23,679 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:54:23,722 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 06:54:23,722 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1426604315] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:54:23,722 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:54:23,722 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 16 [2022-01-18 06:54:23,722 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1510581554] [2022-01-18 06:54:23,722 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:54:23,723 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-18 06:54:23,723 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:54:23,723 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-18 06:54:23,723 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=178, Unknown=0, NotChecked=0, Total=240 [2022-01-18 06:54:23,723 INFO L87 Difference]: Start difference. First operand 1442 states and 5178 transitions. Second operand has 16 states, 16 states have (on average 2.8125) internal successors, (45), 16 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:54:24,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:54:24,251 INFO L93 Difference]: Finished difference Result 3794 states and 12201 transitions. [2022-01-18 06:54:24,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-01-18 06:54:24,252 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.8125) internal successors, (45), 16 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 [2022-01-18 06:54:24,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:54:24,258 INFO L225 Difference]: With dead ends: 3794 [2022-01-18 06:54:24,258 INFO L226 Difference]: Without dead ends: 3790 [2022-01-18 06:54:24,258 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1026 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=800, Invalid=2392, Unknown=0, NotChecked=0, Total=3192 [2022-01-18 06:54:24,259 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 381 mSDsluCounter, 296 mSDsCounter, 0 mSdLazyCounter, 647 mSolverCounterSat, 92 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 381 SdHoareTripleChecker+Valid, 185 SdHoareTripleChecker+Invalid, 739 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 92 IncrementalHoareTripleChecker+Valid, 647 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 06:54:24,259 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [381 Valid, 185 Invalid, 739 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [92 Valid, 647 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 06:54:24,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3790 states. [2022-01-18 06:54:24,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3790 to 1436. [2022-01-18 06:54:24,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1436 states, 1435 states have (on average 3.590940766550523) internal successors, (5153), 1435 states have internal predecessors, (5153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:54:24,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1436 states to 1436 states and 5153 transitions. [2022-01-18 06:54:24,290 INFO L78 Accepts]: Start accepts. Automaton has 1436 states and 5153 transitions. Word has length 24 [2022-01-18 06:54:24,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:54:24,290 INFO L470 AbstractCegarLoop]: Abstraction has 1436 states and 5153 transitions. [2022-01-18 06:54:24,290 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.8125) internal successors, (45), 16 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:54:24,290 INFO L276 IsEmpty]: Start isEmpty. Operand 1436 states and 5153 transitions. [2022-01-18 06:54:24,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 06:54:24,292 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:54:24,293 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:54:24,310 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2022-01-18 06:54:24,508 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,SelfDestructingSolverStorable32 [2022-01-18 06:54:24,508 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 06:54:24,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:54:24,508 INFO L85 PathProgramCache]: Analyzing trace with hash 82890198, now seen corresponding path program 28 times [2022-01-18 06:54:24,508 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:54:24,508 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [366691048] [2022-01-18 06:54:24,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:54:24,508 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:54:24,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:54:24,558 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:54:24,558 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:54:24,567 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [366691048] [2022-01-18 06:54:24,567 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [366691048] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:54:24,567 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1226763106] [2022-01-18 06:54:24,567 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 06:54:24,567 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:54:24,567 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:54:24,569 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 06:54:24,570 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-01-18 06:54:24,590 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 06:54:24,590 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:54:24,590 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-18 06:54:24,590 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:54:24,660 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:54:24,660 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:54:24,721 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:54:24,721 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1226763106] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:54:24,721 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:54:24,721 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 13 [2022-01-18 06:54:24,721 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1297906645] [2022-01-18 06:54:24,722 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:54:24,722 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-01-18 06:54:24,722 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:54:24,722 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-01-18 06:54:24,722 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2022-01-18 06:54:24,722 INFO L87 Difference]: Start difference. First operand 1436 states and 5153 transitions. Second operand has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:54:25,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:54:25,321 INFO L93 Difference]: Finished difference Result 3978 states and 12923 transitions. [2022-01-18 06:54:25,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-01-18 06:54:25,322 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 13 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 [2022-01-18 06:54:25,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:54:25,328 INFO L225 Difference]: With dead ends: 3978 [2022-01-18 06:54:25,328 INFO L226 Difference]: Without dead ends: 3978 [2022-01-18 06:54:25,328 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 41 SyntacticMatches, 2 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1009 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=699, Invalid=2271, Unknown=0, NotChecked=0, Total=2970 [2022-01-18 06:54:25,329 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 294 mSDsluCounter, 231 mSDsCounter, 0 mSdLazyCounter, 426 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 294 SdHoareTripleChecker+Valid, 153 SdHoareTripleChecker+Invalid, 488 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 426 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 06:54:25,329 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [294 Valid, 153 Invalid, 488 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 426 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 06:54:25,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3978 states. [2022-01-18 06:54:25,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3978 to 1585. [2022-01-18 06:54:25,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1585 states, 1584 states have (on average 3.591540404040404) internal successors, (5689), 1584 states have internal predecessors, (5689), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:54:25,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1585 states to 1585 states and 5689 transitions. [2022-01-18 06:54:25,372 INFO L78 Accepts]: Start accepts. Automaton has 1585 states and 5689 transitions. Word has length 24 [2022-01-18 06:54:25,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:54:25,372 INFO L470 AbstractCegarLoop]: Abstraction has 1585 states and 5689 transitions. [2022-01-18 06:54:25,372 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:54:25,373 INFO L276 IsEmpty]: Start isEmpty. Operand 1585 states and 5689 transitions. [2022-01-18 06:54:25,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 06:54:25,375 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:54:25,375 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:54:25,403 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2022-01-18 06:54:25,591 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:54:25,591 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 06:54:25,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:54:25,592 INFO L85 PathProgramCache]: Analyzing trace with hash 164266286, now seen corresponding path program 29 times [2022-01-18 06:54:25,592 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:54:25,592 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [283769915] [2022-01-18 06:54:25,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:54:25,593 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:54:25,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:54:25,629 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:54:25,629 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:54:25,629 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [283769915] [2022-01-18 06:54:25,629 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [283769915] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:54:25,629 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [961852603] [2022-01-18 06:54:25,629 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 06:54:25,629 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:54:25,630 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:54:25,630 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 06:54:25,631 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2022-01-18 06:54:25,650 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 06:54:25,650 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:54:25,651 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-18 06:54:25,651 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:54:25,685 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:54:25,685 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:54:25,722 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:54:25,722 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [961852603] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:54:25,722 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:54:25,722 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 13 [2022-01-18 06:54:25,722 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1416238359] [2022-01-18 06:54:25,722 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:54:25,722 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-01-18 06:54:25,722 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:54:25,722 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-01-18 06:54:25,722 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2022-01-18 06:54:25,722 INFO L87 Difference]: Start difference. First operand 1585 states and 5689 transitions. Second operand has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:54:26,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:54:26,037 INFO L93 Difference]: Finished difference Result 3706 states and 12257 transitions. [2022-01-18 06:54:26,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-01-18 06:54:26,037 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 13 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 [2022-01-18 06:54:26,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:54:26,042 INFO L225 Difference]: With dead ends: 3706 [2022-01-18 06:54:26,042 INFO L226 Difference]: Without dead ends: 3702 [2022-01-18 06:54:26,043 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 42 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 558 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=457, Invalid=1435, Unknown=0, NotChecked=0, Total=1892 [2022-01-18 06:54:26,043 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 311 mSDsluCounter, 194 mSDsCounter, 0 mSdLazyCounter, 421 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 311 SdHoareTripleChecker+Valid, 128 SdHoareTripleChecker+Invalid, 485 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 421 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 06:54:26,044 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [311 Valid, 128 Invalid, 485 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 421 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 06:54:26,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3702 states. [2022-01-18 06:54:26,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3702 to 1575. [2022-01-18 06:54:26,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1575 states, 1574 states have (on average 3.5870393900889455) internal successors, (5646), 1574 states have internal predecessors, (5646), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:54:26,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1575 states to 1575 states and 5646 transitions. [2022-01-18 06:54:26,099 INFO L78 Accepts]: Start accepts. Automaton has 1575 states and 5646 transitions. Word has length 24 [2022-01-18 06:54:26,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:54:26,099 INFO L470 AbstractCegarLoop]: Abstraction has 1575 states and 5646 transitions. [2022-01-18 06:54:26,099 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:54:26,099 INFO L276 IsEmpty]: Start isEmpty. Operand 1575 states and 5646 transitions. [2022-01-18 06:54:26,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 06:54:26,102 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:54:26,102 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:54:26,119 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2022-01-18 06:54:26,316 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:54:26,317 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 06:54:26,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:54:26,317 INFO L85 PathProgramCache]: Analyzing trace with hash -1350825686, now seen corresponding path program 30 times [2022-01-18 06:54:26,317 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:54:26,317 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [627688163] [2022-01-18 06:54:26,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:54:26,317 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:54:26,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:54:26,342 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:54:26,342 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:54:26,342 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [627688163] [2022-01-18 06:54:26,343 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [627688163] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:54:26,343 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1492405645] [2022-01-18 06:54:26,343 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 06:54:26,343 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:54:26,343 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:54:26,343 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 06:54:26,344 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2022-01-18 06:54:26,364 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 06:54:26,364 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:54:26,364 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-18 06:54:26,365 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:54:26,414 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:54:26,414 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:54:26,450 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:54:26,450 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1492405645] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:54:26,450 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:54:26,450 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 13 [2022-01-18 06:54:26,451 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [578272356] [2022-01-18 06:54:26,451 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:54:26,451 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-01-18 06:54:26,451 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:54:26,451 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-01-18 06:54:26,451 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2022-01-18 06:54:26,451 INFO L87 Difference]: Start difference. First operand 1575 states and 5646 transitions. Second operand has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:54:26,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:54:26,836 INFO L93 Difference]: Finished difference Result 4114 states and 13193 transitions. [2022-01-18 06:54:26,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-01-18 06:54:26,836 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 13 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 [2022-01-18 06:54:26,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:54:26,842 INFO L225 Difference]: With dead ends: 4114 [2022-01-18 06:54:26,842 INFO L226 Difference]: Without dead ends: 4102 [2022-01-18 06:54:26,842 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 42 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 660 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=486, Invalid=1676, Unknown=0, NotChecked=0, Total=2162 [2022-01-18 06:54:26,842 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 323 mSDsluCounter, 237 mSDsCounter, 0 mSdLazyCounter, 439 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 323 SdHoareTripleChecker+Valid, 161 SdHoareTripleChecker+Invalid, 501 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 439 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 06:54:26,843 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [323 Valid, 161 Invalid, 501 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 439 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 06:54:26,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4102 states. [2022-01-18 06:54:26,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4102 to 1595. [2022-01-18 06:54:26,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1595 states, 1594 states have (on average 3.5884567126725218) internal successors, (5720), 1594 states have internal predecessors, (5720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:54:26,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1595 states to 1595 states and 5720 transitions. [2022-01-18 06:54:26,876 INFO L78 Accepts]: Start accepts. Automaton has 1595 states and 5720 transitions. Word has length 24 [2022-01-18 06:54:26,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:54:26,876 INFO L470 AbstractCegarLoop]: Abstraction has 1595 states and 5720 transitions. [2022-01-18 06:54:26,876 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:54:26,876 INFO L276 IsEmpty]: Start isEmpty. Operand 1595 states and 5720 transitions. [2022-01-18 06:54:26,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 06:54:26,878 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:54:26,878 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:54:26,893 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2022-01-18 06:54:27,091 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,SelfDestructingSolverStorable35 [2022-01-18 06:54:27,091 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 06:54:27,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:54:27,092 INFO L85 PathProgramCache]: Analyzing trace with hash 246301030, now seen corresponding path program 31 times [2022-01-18 06:54:27,092 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:54:27,092 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1966232110] [2022-01-18 06:54:27,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:54:27,092 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:54:27,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:54:27,132 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:54:27,132 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:54:27,132 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1966232110] [2022-01-18 06:54:27,132 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1966232110] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:54:27,132 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1186117676] [2022-01-18 06:54:27,132 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 06:54:27,133 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:54:27,133 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:54:27,133 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 06:54:27,135 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2022-01-18 06:54:27,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:54:27,153 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-18 06:54:27,154 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:54:27,236 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:54:27,236 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:54:27,314 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:54:27,314 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1186117676] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:54:27,314 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:54:27,314 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 17 [2022-01-18 06:54:27,315 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1090239385] [2022-01-18 06:54:27,315 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:54:27,315 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-18 06:54:27,315 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:54:27,315 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-18 06:54:27,315 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2022-01-18 06:54:27,315 INFO L87 Difference]: Start difference. First operand 1595 states and 5720 transitions. Second operand has 17 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 17 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:54:27,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:54:27,900 INFO L93 Difference]: Finished difference Result 3694 states and 11776 transitions. [2022-01-18 06:54:27,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-01-18 06:54:27,901 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 17 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 [2022-01-18 06:54:27,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:54:27,906 INFO L225 Difference]: With dead ends: 3694 [2022-01-18 06:54:27,906 INFO L226 Difference]: Without dead ends: 3694 [2022-01-18 06:54:27,907 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 37 SyntacticMatches, 2 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 803 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=678, Invalid=1772, Unknown=0, NotChecked=0, Total=2450 [2022-01-18 06:54:27,907 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 388 mSDsluCounter, 400 mSDsCounter, 0 mSdLazyCounter, 546 mSolverCounterSat, 70 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 388 SdHoareTripleChecker+Valid, 258 SdHoareTripleChecker+Invalid, 616 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 546 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 06:54:27,907 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [388 Valid, 258 Invalid, 616 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [70 Valid, 546 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 06:54:27,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3694 states. [2022-01-18 06:54:27,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3694 to 1680. [2022-01-18 06:54:27,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1680 states, 1679 states have (on average 3.5842763549731984) internal successors, (6018), 1679 states have internal predecessors, (6018), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:54:27,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1680 states to 1680 states and 6018 transitions. [2022-01-18 06:54:27,940 INFO L78 Accepts]: Start accepts. Automaton has 1680 states and 6018 transitions. Word has length 24 [2022-01-18 06:54:27,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:54:27,940 INFO L470 AbstractCegarLoop]: Abstraction has 1680 states and 6018 transitions. [2022-01-18 06:54:27,940 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 17 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:54:27,941 INFO L276 IsEmpty]: Start isEmpty. Operand 1680 states and 6018 transitions. [2022-01-18 06:54:27,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 06:54:27,943 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:54:27,943 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:54:27,958 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2022-01-18 06:54:28,152 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2022-01-18 06:54:28,152 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 06:54:28,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:54:28,153 INFO L85 PathProgramCache]: Analyzing trace with hash 1889340184, now seen corresponding path program 32 times [2022-01-18 06:54:28,153 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:54:28,153 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1395710860] [2022-01-18 06:54:28,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:54:28,153 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:54:28,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:54:28,198 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:54:28,198 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:54:28,198 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1395710860] [2022-01-18 06:54:28,198 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1395710860] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:54:28,198 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1857060615] [2022-01-18 06:54:28,198 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 06:54:28,199 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:54:28,199 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:54:28,200 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 06:54:28,200 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2022-01-18 06:54:28,223 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 06:54:28,223 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:54:28,223 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-18 06:54:28,223 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:54:28,303 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:54:28,303 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:54:28,382 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:54:28,382 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1857060615] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:54:28,382 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:54:28,382 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 17 [2022-01-18 06:54:28,382 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1269470659] [2022-01-18 06:54:28,382 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:54:28,382 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-18 06:54:28,382 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:54:28,382 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-18 06:54:28,382 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=206, Unknown=0, NotChecked=0, Total=272 [2022-01-18 06:54:28,383 INFO L87 Difference]: Start difference. First operand 1680 states and 6018 transitions. Second operand has 17 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 17 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:54:29,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:54:29,136 INFO L93 Difference]: Finished difference Result 3420 states and 11230 transitions. [2022-01-18 06:54:29,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-01-18 06:54:29,136 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 17 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 [2022-01-18 06:54:29,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:54:29,141 INFO L225 Difference]: With dead ends: 3420 [2022-01-18 06:54:29,142 INFO L226 Difference]: Without dead ends: 3416 [2022-01-18 06:54:29,142 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1197 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=880, Invalid=2780, Unknown=0, NotChecked=0, Total=3660 [2022-01-18 06:54:29,142 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 351 mSDsluCounter, 300 mSDsCounter, 0 mSdLazyCounter, 620 mSolverCounterSat, 93 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 351 SdHoareTripleChecker+Valid, 199 SdHoareTripleChecker+Invalid, 713 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 93 IncrementalHoareTripleChecker+Valid, 620 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 06:54:29,143 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [351 Valid, 199 Invalid, 713 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [93 Valid, 620 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 06:54:29,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3416 states. [2022-01-18 06:54:29,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3416 to 1678. [2022-01-18 06:54:29,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1678 states, 1677 states have (on average 3.5819916517590937) internal successors, (6007), 1677 states have internal predecessors, (6007), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:54:29,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1678 states to 1678 states and 6007 transitions. [2022-01-18 06:54:29,174 INFO L78 Accepts]: Start accepts. Automaton has 1678 states and 6007 transitions. Word has length 24 [2022-01-18 06:54:29,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:54:29,174 INFO L470 AbstractCegarLoop]: Abstraction has 1678 states and 6007 transitions. [2022-01-18 06:54:29,174 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 17 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:54:29,174 INFO L276 IsEmpty]: Start isEmpty. Operand 1678 states and 6007 transitions. [2022-01-18 06:54:29,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 06:54:29,177 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:54:29,177 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:54:29,192 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2022-01-18 06:54:29,392 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,SelfDestructingSolverStorable37 [2022-01-18 06:54:29,392 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 06:54:29,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:54:29,392 INFO L85 PathProgramCache]: Analyzing trace with hash 621883006, now seen corresponding path program 33 times [2022-01-18 06:54:29,392 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:54:29,393 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1493332105] [2022-01-18 06:54:29,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:54:29,393 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:54:29,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:54:29,418 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:54:29,418 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:54:29,418 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1493332105] [2022-01-18 06:54:29,418 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1493332105] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:54:29,418 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [296862939] [2022-01-18 06:54:29,418 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 06:54:29,419 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:54:29,419 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:54:29,419 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 06:54:29,420 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2022-01-18 06:54:29,439 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 06:54:29,439 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:54:29,439 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-18 06:54:29,440 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:54:29,514 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:54:29,514 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:54:29,593 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:54:29,593 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [296862939] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:54:29,593 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:54:29,593 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 15 [2022-01-18 06:54:29,593 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1522384484] [2022-01-18 06:54:29,594 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:54:29,594 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-01-18 06:54:29,594 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:54:29,594 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-01-18 06:54:29,594 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2022-01-18 06:54:29,594 INFO L87 Difference]: Start difference. First operand 1678 states and 6007 transitions. Second operand has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:54:30,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:54:30,185 INFO L93 Difference]: Finished difference Result 3256 states and 10823 transitions. [2022-01-18 06:54:30,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-01-18 06:54:30,185 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 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 24 [2022-01-18 06:54:30,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:54:30,190 INFO L225 Difference]: With dead ends: 3256 [2022-01-18 06:54:30,190 INFO L226 Difference]: Without dead ends: 3244 [2022-01-18 06:54:30,191 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 748 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=558, Invalid=1794, Unknown=0, NotChecked=0, Total=2352 [2022-01-18 06:54:30,191 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 294 mSDsluCounter, 196 mSDsCounter, 0 mSdLazyCounter, 431 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 294 SdHoareTripleChecker+Valid, 150 SdHoareTripleChecker+Invalid, 495 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 431 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 06:54:30,191 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [294 Valid, 150 Invalid, 495 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 431 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 06:54:30,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3244 states. [2022-01-18 06:54:30,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3244 to 1676. [2022-01-18 06:54:30,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1676 states, 1675 states have (on average 3.5797014925373136) internal successors, (5996), 1675 states have internal predecessors, (5996), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:54:30,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1676 states to 1676 states and 5996 transitions. [2022-01-18 06:54:30,222 INFO L78 Accepts]: Start accepts. Automaton has 1676 states and 5996 transitions. Word has length 24 [2022-01-18 06:54:30,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:54:30,222 INFO L470 AbstractCegarLoop]: Abstraction has 1676 states and 5996 transitions. [2022-01-18 06:54:30,222 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:54:30,222 INFO L276 IsEmpty]: Start isEmpty. Operand 1676 states and 5996 transitions. [2022-01-18 06:54:30,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 06:54:30,225 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:54:30,225 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:54:30,240 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Ended with exit code 0 [2022-01-18 06:54:30,440 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2022-01-18 06:54:30,440 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 06:54:30,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:54:30,440 INFO L85 PathProgramCache]: Analyzing trace with hash -1878950772, now seen corresponding path program 4 times [2022-01-18 06:54:30,440 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:54:30,440 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1187582716] [2022-01-18 06:54:30,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:54:30,440 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:54:30,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:54:30,717 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:54:30,717 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:54:30,718 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1187582716] [2022-01-18 06:54:30,718 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1187582716] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:54:30,718 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [506252362] [2022-01-18 06:54:30,718 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 06:54:30,718 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:54:30,718 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:54:30,719 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 06:54:30,719 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2022-01-18 06:54:30,741 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 06:54:30,741 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:54:30,741 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2022-01-18 06:54:30,742 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:54:31,343 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:54:31,344 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:54:31,344 INFO L387 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 109 treesize of output 75 [2022-01-18 06:54:31,430 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:54:31,430 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:54:32,004 INFO L353 Elim1Store]: treesize reduction 10, result has 81.8 percent of original size [2022-01-18 06:54:32,004 INFO L387 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 191 treesize of output 161 [2022-01-18 06:54:33,140 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:54:33,140 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [506252362] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:54:33,140 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:54:33,140 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 25 [2022-01-18 06:54:33,140 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1616615507] [2022-01-18 06:54:33,140 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:54:33,140 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-18 06:54:33,140 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:54:33,140 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-18 06:54:33,141 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=513, Unknown=0, NotChecked=0, Total=600 [2022-01-18 06:54:33,141 INFO L87 Difference]: Start difference. First operand 1676 states and 5996 transitions. Second operand has 25 states, 25 states have (on average 2.6) internal successors, (65), 25 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) [2022-01-18 06:54:37,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:54:37,366 INFO L93 Difference]: Finished difference Result 3630 states and 11848 transitions. [2022-01-18 06:54:37,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-01-18 06:54:37,367 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.6) internal successors, (65), 25 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 26 [2022-01-18 06:54:37,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:54:37,372 INFO L225 Difference]: With dead ends: 3630 [2022-01-18 06:54:37,372 INFO L226 Difference]: Without dead ends: 3585 [2022-01-18 06:54:37,373 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1521 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=712, Invalid=4258, Unknown=0, NotChecked=0, Total=4970 [2022-01-18 06:54:37,373 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 386 mSDsluCounter, 615 mSDsCounter, 0 mSdLazyCounter, 1453 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 386 SdHoareTripleChecker+Valid, 292 SdHoareTripleChecker+Invalid, 1506 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 1453 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-18 06:54:37,373 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [386 Valid, 292 Invalid, 1506 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 1453 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-18 06:54:37,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3585 states. [2022-01-18 06:54:37,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3585 to 1767. [2022-01-18 06:54:37,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1767 states, 1766 states have (on average 3.5781426953567386) internal successors, (6319), 1766 states have internal predecessors, (6319), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:54:37,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1767 states to 1767 states and 6319 transitions. [2022-01-18 06:54:37,404 INFO L78 Accepts]: Start accepts. Automaton has 1767 states and 6319 transitions. Word has length 26 [2022-01-18 06:54:37,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:54:37,404 INFO L470 AbstractCegarLoop]: Abstraction has 1767 states and 6319 transitions. [2022-01-18 06:54:37,404 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.6) internal successors, (65), 25 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) [2022-01-18 06:54:37,405 INFO L276 IsEmpty]: Start isEmpty. Operand 1767 states and 6319 transitions. [2022-01-18 06:54:37,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 06:54:37,407 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:54:37,407 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:54:37,423 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2022-01-18 06:54:37,622 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,SelfDestructingSolverStorable39 [2022-01-18 06:54:37,623 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 06:54:37,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:54:37,623 INFO L85 PathProgramCache]: Analyzing trace with hash 387618508, now seen corresponding path program 5 times [2022-01-18 06:54:37,623 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:54:37,623 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [953409899] [2022-01-18 06:54:37,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:54:37,623 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:54:37,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:54:37,999 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:54:37,999 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:54:37,999 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [953409899] [2022-01-18 06:54:37,999 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [953409899] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:54:37,999 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1618596605] [2022-01-18 06:54:37,999 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 06:54:37,999 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:54:38,000 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:54:38,000 INFO L229 MonitoredProcess]: Starting monitored process 39 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 06:54:38,015 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2022-01-18 06:54:38,040 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 06:54:38,040 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:54:38,040 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2022-01-18 06:54:38,041 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:54:38,563 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:54:38,563 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:54:38,563 INFO L387 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 109 treesize of output 75 [2022-01-18 06:54:38,705 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:54:38,705 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:54:39,182 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:54:39,200 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 06:54:39,200 INFO L387 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 187 treesize of output 157 [2022-01-18 06:54:40,249 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:54:40,249 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1618596605] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:54:40,249 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:54:40,249 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 26 [2022-01-18 06:54:40,250 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1081379555] [2022-01-18 06:54:40,250 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:54:40,250 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-18 06:54:40,250 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:54:40,250 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-18 06:54:40,250 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=531, Unknown=0, NotChecked=0, Total=650 [2022-01-18 06:54:40,250 INFO L87 Difference]: Start difference. First operand 1767 states and 6319 transitions. Second operand has 26 states, 26 states have (on average 2.5) internal successors, (65), 26 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) [2022-01-18 06:54:43,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:54:43,918 INFO L93 Difference]: Finished difference Result 4089 states and 13161 transitions. [2022-01-18 06:54:43,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-01-18 06:54:43,918 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.5) internal successors, (65), 26 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 26 [2022-01-18 06:54:43,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:54:43,925 INFO L225 Difference]: With dead ends: 4089 [2022-01-18 06:54:43,925 INFO L226 Difference]: Without dead ends: 4059 [2022-01-18 06:54:43,932 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 36 SyntacticMatches, 3 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1473 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=863, Invalid=3693, Unknown=0, NotChecked=0, Total=4556 [2022-01-18 06:54:43,934 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 536 mSDsluCounter, 612 mSDsCounter, 0 mSdLazyCounter, 1108 mSolverCounterSat, 130 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 536 SdHoareTripleChecker+Valid, 311 SdHoareTripleChecker+Invalid, 1336 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 130 IncrementalHoareTripleChecker+Valid, 1108 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 98 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-18 06:54:43,934 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [536 Valid, 311 Invalid, 1336 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [130 Valid, 1108 Invalid, 0 Unknown, 98 Unchecked, 0.7s Time] [2022-01-18 06:54:43,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4059 states. [2022-01-18 06:54:43,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4059 to 1888. [2022-01-18 06:54:43,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1888 states, 1887 states have (on average 3.577106518282989) internal successors, (6750), 1887 states have internal predecessors, (6750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:54:43,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1888 states to 1888 states and 6750 transitions. [2022-01-18 06:54:43,975 INFO L78 Accepts]: Start accepts. Automaton has 1888 states and 6750 transitions. Word has length 26 [2022-01-18 06:54:43,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:54:43,976 INFO L470 AbstractCegarLoop]: Abstraction has 1888 states and 6750 transitions. [2022-01-18 06:54:43,976 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.5) internal successors, (65), 26 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) [2022-01-18 06:54:43,976 INFO L276 IsEmpty]: Start isEmpty. Operand 1888 states and 6750 transitions. [2022-01-18 06:54:43,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 06:54:43,979 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:54:43,979 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:54:43,995 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2022-01-18 06:54:44,183 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,SelfDestructingSolverStorable40 [2022-01-18 06:54:44,183 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 06:54:44,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:54:44,184 INFO L85 PathProgramCache]: Analyzing trace with hash -1106289214, now seen corresponding path program 6 times [2022-01-18 06:54:44,184 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:54:44,184 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1232885582] [2022-01-18 06:54:44,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:54:44,184 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:54:44,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:54:44,456 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:54:44,457 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:54:44,457 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1232885582] [2022-01-18 06:54:44,457 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1232885582] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:54:44,457 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [719875052] [2022-01-18 06:54:44,457 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 06:54:44,457 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:54:44,457 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:54:44,480 INFO L229 MonitoredProcess]: Starting monitored process 40 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 06:54:44,486 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2022-01-18 06:54:44,507 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 06:54:44,507 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:54:44,508 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-18 06:54:44,508 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:54:44,911 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:54:44,914 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 06:54:44,914 INFO L387 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 109 treesize of output 83 [2022-01-18 06:54:45,384 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:54:45,385 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:54:46,156 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:54:46,157 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:54:46,171 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 06:54:46,172 INFO L387 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 187 treesize of output 149 [2022-01-18 06:54:46,775 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:54:46,775 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [719875052] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:54:46,776 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:54:46,776 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 28 [2022-01-18 06:54:46,776 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [877480322] [2022-01-18 06:54:46,776 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:54:46,776 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-01-18 06:54:46,776 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:54:46,776 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-01-18 06:54:46,776 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=645, Unknown=0, NotChecked=0, Total=756 [2022-01-18 06:54:46,776 INFO L87 Difference]: Start difference. First operand 1888 states and 6750 transitions. Second operand has 28 states, 28 states have (on average 2.4285714285714284) internal successors, (68), 28 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:54:55,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:54:55,747 INFO L93 Difference]: Finished difference Result 3978 states and 13034 transitions. [2022-01-18 06:54:55,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2022-01-18 06:54:55,747 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.4285714285714284) internal successors, (68), 28 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-01-18 06:54:55,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:54:55,753 INFO L225 Difference]: With dead ends: 3978 [2022-01-18 06:54:55,754 INFO L226 Difference]: Without dead ends: 3933 [2022-01-18 06:54:55,754 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3515 ImplicationChecksByTransitivity, 8.4s TimeCoverageRelationStatistics Valid=1432, Invalid=8870, Unknown=0, NotChecked=0, Total=10302 [2022-01-18 06:54:55,756 INFO L933 BasicCegarLoop]: 45 mSDtfsCounter, 521 mSDsluCounter, 1248 mSDsCounter, 0 mSdLazyCounter, 2058 mSolverCounterSat, 86 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 521 SdHoareTripleChecker+Valid, 685 SdHoareTripleChecker+Invalid, 3016 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 86 IncrementalHoareTripleChecker+Valid, 2058 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 872 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-01-18 06:54:55,757 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [521 Valid, 685 Invalid, 3016 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [86 Valid, 2058 Invalid, 0 Unknown, 872 Unchecked, 1.2s Time] [2022-01-18 06:54:55,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3933 states. [2022-01-18 06:54:55,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3933 to 1944. [2022-01-18 06:54:55,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1944 states, 1943 states have (on average 3.5795162120432322) internal successors, (6955), 1943 states have internal predecessors, (6955), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:54:55,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1944 states to 1944 states and 6955 transitions. [2022-01-18 06:54:55,814 INFO L78 Accepts]: Start accepts. Automaton has 1944 states and 6955 transitions. Word has length 26 [2022-01-18 06:54:55,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:54:55,814 INFO L470 AbstractCegarLoop]: Abstraction has 1944 states and 6955 transitions. [2022-01-18 06:54:55,814 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.4285714285714284) internal successors, (68), 28 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:54:55,814 INFO L276 IsEmpty]: Start isEmpty. Operand 1944 states and 6955 transitions. [2022-01-18 06:54:55,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 06:54:55,818 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:54:55,818 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:54:55,840 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Ended with exit code 0 [2022-01-18 06:54:56,023 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,SelfDestructingSolverStorable41 [2022-01-18 06:54:56,023 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 06:54:56,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:54:56,024 INFO L85 PathProgramCache]: Analyzing trace with hash 1979047816, now seen corresponding path program 34 times [2022-01-18 06:54:56,024 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:54:56,024 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1757698969] [2022-01-18 06:54:56,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:54:56,024 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:54:56,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:54:56,571 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:54:56,571 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:54:56,571 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1757698969] [2022-01-18 06:54:56,571 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1757698969] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:54:56,571 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [384474750] [2022-01-18 06:54:56,571 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 06:54:56,571 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:54:56,571 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:54:56,572 INFO L229 MonitoredProcess]: Starting monitored process 41 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 06:54:56,573 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2022-01-18 06:54:56,612 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 06:54:56,612 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:54:56,613 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2022-01-18 06:54:56,613 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:54:57,078 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:54:57,078 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:54:57,078 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:54:57,079 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:54:57,079 INFO L387 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 115 treesize of output 75 [2022-01-18 06:54:57,157 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:54:57,157 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:54:57,567 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 06:54:57,567 INFO L387 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 211 treesize of output 149 [2022-01-18 06:54:57,948 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:54:57,948 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [384474750] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:54:57,949 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:54:57,949 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 9] total 24 [2022-01-18 06:54:57,949 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1364001238] [2022-01-18 06:54:57,949 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:54:57,949 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-18 06:54:57,949 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:54:57,949 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-18 06:54:57,949 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=516, Unknown=0, NotChecked=0, Total=600 [2022-01-18 06:54:57,949 INFO L87 Difference]: Start difference. First operand 1944 states and 6955 transitions. Second operand has 25 states, 25 states have (on average 2.76) internal successors, (69), 24 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) [2022-01-18 06:55:02,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:55:02,105 INFO L93 Difference]: Finished difference Result 3870 states and 12988 transitions. [2022-01-18 06:55:02,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-01-18 06:55:02,106 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.76) internal successors, (69), 24 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 26 [2022-01-18 06:55:02,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:55:02,112 INFO L225 Difference]: With dead ends: 3870 [2022-01-18 06:55:02,112 INFO L226 Difference]: Without dead ends: 3840 [2022-01-18 06:55:02,113 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1674 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=848, Invalid=4702, Unknown=0, NotChecked=0, Total=5550 [2022-01-18 06:55:02,113 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 339 mSDsluCounter, 773 mSDsCounter, 0 mSdLazyCounter, 1732 mSolverCounterSat, 89 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 339 SdHoareTripleChecker+Valid, 352 SdHoareTripleChecker+Invalid, 1821 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 89 IncrementalHoareTripleChecker+Valid, 1732 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-18 06:55:02,113 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [339 Valid, 352 Invalid, 1821 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [89 Valid, 1732 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-18 06:55:02,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3840 states. [2022-01-18 06:55:02,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3840 to 1990. [2022-01-18 06:55:02,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1990 states, 1989 states have (on average 3.5696329813976875) internal successors, (7100), 1989 states have internal predecessors, (7100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:55:02,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1990 states to 1990 states and 7100 transitions. [2022-01-18 06:55:02,180 INFO L78 Accepts]: Start accepts. Automaton has 1990 states and 7100 transitions. Word has length 26 [2022-01-18 06:55:02,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:55:02,180 INFO L470 AbstractCegarLoop]: Abstraction has 1990 states and 7100 transitions. [2022-01-18 06:55:02,180 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.76) internal successors, (69), 24 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) [2022-01-18 06:55:02,180 INFO L276 IsEmpty]: Start isEmpty. Operand 1990 states and 7100 transitions. [2022-01-18 06:55:02,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 06:55:02,185 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:55:02,185 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:55:02,209 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Ended with exit code 0 [2022-01-18 06:55:02,399 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,SelfDestructingSolverStorable42 [2022-01-18 06:55:02,399 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 06:55:02,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:55:02,400 INFO L85 PathProgramCache]: Analyzing trace with hash -1510872304, now seen corresponding path program 7 times [2022-01-18 06:55:02,400 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:55:02,400 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1023630516] [2022-01-18 06:55:02,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:55:02,400 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:55:02,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:55:02,762 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:55:02,762 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:55:02,762 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1023630516] [2022-01-18 06:55:02,762 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1023630516] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:55:02,762 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1850230010] [2022-01-18 06:55:02,763 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 06:55:02,763 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:55:02,763 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:55:02,763 INFO L229 MonitoredProcess]: Starting monitored process 42 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 06:55:02,765 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2022-01-18 06:55:02,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:55:02,787 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-18 06:55:02,787 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:55:03,192 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:55:03,192 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:55:03,194 INFO L387 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 109 treesize of output 75 [2022-01-18 06:55:03,275 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:55:03,275 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:55:03,604 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:55:03,618 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 06:55:03,618 INFO L387 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 199 treesize of output 169 [2022-01-18 06:55:05,450 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:55:05,451 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1850230010] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:55:05,451 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:55:05,451 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-01-18 06:55:05,451 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1453867156] [2022-01-18 06:55:05,451 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:55:05,451 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-18 06:55:05,451 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:55:05,451 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-18 06:55:05,451 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=489, Unknown=0, NotChecked=0, Total=600 [2022-01-18 06:55:05,451 INFO L87 Difference]: Start difference. First operand 1990 states and 7100 transitions. Second operand has 25 states, 25 states have (on average 2.56) internal successors, (64), 25 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:55:10,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:55:10,300 INFO L93 Difference]: Finished difference Result 4768 states and 14952 transitions. [2022-01-18 06:55:10,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2022-01-18 06:55:10,301 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.56) internal successors, (64), 25 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-01-18 06:55:10,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:55:10,308 INFO L225 Difference]: With dead ends: 4768 [2022-01-18 06:55:10,308 INFO L226 Difference]: Without dead ends: 4738 [2022-01-18 06:55:10,309 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 35 SyntacticMatches, 3 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1869 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=1123, Invalid=4577, Unknown=0, NotChecked=0, Total=5700 [2022-01-18 06:55:10,309 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 668 mSDsluCounter, 847 mSDsCounter, 0 mSdLazyCounter, 1582 mSolverCounterSat, 140 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 668 SdHoareTripleChecker+Valid, 452 SdHoareTripleChecker+Invalid, 1947 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 140 IncrementalHoareTripleChecker+Valid, 1582 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 225 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-18 06:55:10,309 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [668 Valid, 452 Invalid, 1947 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [140 Valid, 1582 Invalid, 0 Unknown, 225 Unchecked, 0.9s Time] [2022-01-18 06:55:10,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4738 states. [2022-01-18 06:55:10,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4738 to 2032. [2022-01-18 06:55:10,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2032 states, 2031 states have (on average 3.564746430329887) internal successors, (7240), 2031 states have internal predecessors, (7240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:55:10,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2032 states to 2032 states and 7240 transitions. [2022-01-18 06:55:10,350 INFO L78 Accepts]: Start accepts. Automaton has 2032 states and 7240 transitions. Word has length 26 [2022-01-18 06:55:10,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:55:10,350 INFO L470 AbstractCegarLoop]: Abstraction has 2032 states and 7240 transitions. [2022-01-18 06:55:10,350 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.56) internal successors, (64), 25 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:55:10,351 INFO L276 IsEmpty]: Start isEmpty. Operand 2032 states and 7240 transitions. [2022-01-18 06:55:10,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 06:55:10,354 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:55:10,354 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:55:10,371 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2022-01-18 06:55:10,569 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:55:10,569 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 06:55:10,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:55:10,569 INFO L85 PathProgramCache]: Analyzing trace with hash 39509260, now seen corresponding path program 35 times [2022-01-18 06:55:10,569 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:55:10,569 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1928086000] [2022-01-18 06:55:10,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:55:10,569 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:55:10,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:55:10,981 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:55:10,981 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:55:10,981 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1928086000] [2022-01-18 06:55:10,981 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1928086000] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:55:10,982 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1151619903] [2022-01-18 06:55:10,982 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 06:55:10,982 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:55:10,982 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:55:10,983 INFO L229 MonitoredProcess]: Starting monitored process 43 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 06:55:10,984 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2022-01-18 06:55:11,005 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 06:55:11,006 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:55:11,006 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2022-01-18 06:55:11,007 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:55:11,473 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:55:11,473 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:55:11,474 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:55:11,474 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:55:11,474 INFO L387 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 115 treesize of output 75 [2022-01-18 06:55:11,554 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:55:11,554 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:55:11,883 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 06:55:11,883 INFO L387 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 211 treesize of output 149 [2022-01-18 06:55:12,323 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:55:12,324 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1151619903] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:55:12,324 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:55:12,324 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 9] total 24 [2022-01-18 06:55:12,324 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [516805880] [2022-01-18 06:55:12,324 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:55:12,324 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-18 06:55:12,324 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:55:12,324 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-18 06:55:12,325 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=511, Unknown=0, NotChecked=0, Total=600 [2022-01-18 06:55:12,325 INFO L87 Difference]: Start difference. First operand 2032 states and 7240 transitions. Second operand has 25 states, 25 states have (on average 2.76) internal successors, (69), 24 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) [2022-01-18 06:55:18,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:55:18,380 INFO L93 Difference]: Finished difference Result 4884 states and 15991 transitions. [2022-01-18 06:55:18,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2022-01-18 06:55:18,380 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.76) internal successors, (69), 24 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 26 [2022-01-18 06:55:18,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:55:18,388 INFO L225 Difference]: With dead ends: 4884 [2022-01-18 06:55:18,388 INFO L226 Difference]: Without dead ends: 4822 [2022-01-18 06:55:18,389 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3332 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=1548, Invalid=8154, Unknown=0, NotChecked=0, Total=9702 [2022-01-18 06:55:18,389 INFO L933 BasicCegarLoop]: 48 mSDtfsCounter, 470 mSDsluCounter, 1094 mSDsCounter, 0 mSdLazyCounter, 2236 mSolverCounterSat, 110 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 470 SdHoareTripleChecker+Valid, 566 SdHoareTripleChecker+Invalid, 2346 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 110 IncrementalHoareTripleChecker+Valid, 2236 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-01-18 06:55:18,389 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [470 Valid, 566 Invalid, 2346 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [110 Valid, 2236 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-01-18 06:55:18,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4822 states. [2022-01-18 06:55:18,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4822 to 2058. [2022-01-18 06:55:18,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2058 states, 2057 states have (on average 3.5639280505590665) internal successors, (7331), 2057 states have internal predecessors, (7331), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:55:18,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2058 states to 2058 states and 7331 transitions. [2022-01-18 06:55:18,431 INFO L78 Accepts]: Start accepts. Automaton has 2058 states and 7331 transitions. Word has length 26 [2022-01-18 06:55:18,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:55:18,431 INFO L470 AbstractCegarLoop]: Abstraction has 2058 states and 7331 transitions. [2022-01-18 06:55:18,431 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.76) internal successors, (69), 24 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) [2022-01-18 06:55:18,432 INFO L276 IsEmpty]: Start isEmpty. Operand 2058 states and 7331 transitions. [2022-01-18 06:55:18,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 06:55:18,435 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:55:18,435 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:55:18,451 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Ended with exit code 0 [2022-01-18 06:55:18,650 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:55:18,650 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 06:55:18,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:55:18,651 INFO L85 PathProgramCache]: Analyzing trace with hash -936809584, now seen corresponding path program 36 times [2022-01-18 06:55:18,651 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:55:18,651 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [674088011] [2022-01-18 06:55:18,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:55:18,651 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:55:18,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:55:19,027 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:55:19,027 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:55:19,027 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [674088011] [2022-01-18 06:55:19,028 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [674088011] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:55:19,028 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1243785996] [2022-01-18 06:55:19,028 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 06:55:19,028 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:55:19,028 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:55:19,029 INFO L229 MonitoredProcess]: Starting monitored process 44 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 06:55:19,030 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2022-01-18 06:55:19,052 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 06:55:19,052 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:55:19,053 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2022-01-18 06:55:19,053 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:55:19,504 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:55:19,506 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:55:19,515 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 06:55:19,516 INFO L387 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 115 treesize of output 101 [2022-01-18 06:55:20,037 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:55:20,037 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:55:20,498 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 06:55:20,499 INFO L387 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 211 treesize of output 149 [2022-01-18 06:55:21,232 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:55:21,232 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1243785996] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:55:21,232 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:55:21,232 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9, 9] total 25 [2022-01-18 06:55:21,232 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [881127719] [2022-01-18 06:55:21,232 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:55:21,232 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-18 06:55:21,232 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:55:21,232 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-18 06:55:21,233 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=557, Unknown=0, NotChecked=0, Total=650 [2022-01-18 06:55:21,233 INFO L87 Difference]: Start difference. First operand 2058 states and 7331 transitions. Second operand has 26 states, 26 states have (on average 2.6538461538461537) internal successors, (69), 25 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) [2022-01-18 06:55:42,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:55:42,227 INFO L93 Difference]: Finished difference Result 5933 states and 18878 transitions. [2022-01-18 06:55:42,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 193 states. [2022-01-18 06:55:42,228 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.6538461538461537) internal successors, (69), 25 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 26 [2022-01-18 06:55:42,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:55:42,238 INFO L225 Difference]: With dead ends: 5933 [2022-01-18 06:55:42,238 INFO L226 Difference]: Without dead ends: 5885 [2022-01-18 06:55:42,240 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 247 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 209 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18563 ImplicationChecksByTransitivity, 18.5s TimeCoverageRelationStatistics Valid=4659, Invalid=39651, Unknown=0, NotChecked=0, Total=44310 [2022-01-18 06:55:42,241 INFO L933 BasicCegarLoop]: 71 mSDtfsCounter, 688 mSDsluCounter, 1821 mSDsCounter, 0 mSdLazyCounter, 4961 mSolverCounterSat, 109 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 688 SdHoareTripleChecker+Valid, 1041 SdHoareTripleChecker+Invalid, 5070 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 109 IncrementalHoareTripleChecker+Valid, 4961 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2022-01-18 06:55:42,242 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [688 Valid, 1041 Invalid, 5070 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [109 Valid, 4961 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2022-01-18 06:55:42,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5885 states. [2022-01-18 06:55:42,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5885 to 2149. [2022-01-18 06:55:42,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2149 states, 2148 states have (on average 3.5591247672253257) internal successors, (7645), 2148 states have internal predecessors, (7645), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:55:42,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2149 states to 2149 states and 7645 transitions. [2022-01-18 06:55:42,298 INFO L78 Accepts]: Start accepts. Automaton has 2149 states and 7645 transitions. Word has length 26 [2022-01-18 06:55:42,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:55:42,299 INFO L470 AbstractCegarLoop]: Abstraction has 2149 states and 7645 transitions. [2022-01-18 06:55:42,299 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.6538461538461537) internal successors, (69), 25 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) [2022-01-18 06:55:42,299 INFO L276 IsEmpty]: Start isEmpty. Operand 2149 states and 7645 transitions. [2022-01-18 06:55:42,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 06:55:42,302 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:55:42,302 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:55:42,318 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Ended with exit code 0 [2022-01-18 06:55:42,518 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,SelfDestructingSolverStorable45 [2022-01-18 06:55:42,518 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 06:55:42,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:55:42,518 INFO L85 PathProgramCache]: Analyzing trace with hash -755307532, now seen corresponding path program 8 times [2022-01-18 06:55:42,518 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:55:42,518 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1745171167] [2022-01-18 06:55:42,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:55:42,519 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:55:42,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:55:43,004 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:55:43,004 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:55:43,004 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1745171167] [2022-01-18 06:55:43,004 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1745171167] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:55:43,005 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [65863081] [2022-01-18 06:55:43,005 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 06:55:43,005 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:55:43,005 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:55:43,025 INFO L229 MonitoredProcess]: Starting monitored process 45 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 06:55:43,050 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 06:55:43,050 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:55:43,051 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2022-01-18 06:55:43,051 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 30 conjunts are in the unsatisfiable core [2022-01-18 06:55:43,051 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:55:43,624 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 06:55:43,624 INFO L387 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 109 treesize of output 91 [2022-01-18 06:55:44,187 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:55:44,187 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:55:44,773 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:55:44,773 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:55:44,789 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 06:55:44,789 INFO L387 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 187 treesize of output 149 [2022-01-18 06:55:45,316 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:55:45,316 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [65863081] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:55:45,316 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:55:45,316 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12, 12] total 28 [2022-01-18 06:55:45,316 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1827563069] [2022-01-18 06:55:45,316 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:55:45,316 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-01-18 06:55:45,317 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:55:45,317 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-01-18 06:55:45,317 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=640, Unknown=0, NotChecked=0, Total=756 [2022-01-18 06:55:45,317 INFO L87 Difference]: Start difference. First operand 2149 states and 7645 transitions. Second operand has 28 states, 28 states have (on average 2.4642857142857144) internal successors, (69), 28 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) [2022-01-18 06:55:51,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:55:51,184 INFO L93 Difference]: Finished difference Result 4622 states and 15242 transitions. [2022-01-18 06:55:51,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-01-18 06:55:51,185 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.4642857142857144) internal successors, (69), 28 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 26 [2022-01-18 06:55:51,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:55:51,193 INFO L225 Difference]: With dead ends: 4622 [2022-01-18 06:55:51,193 INFO L226 Difference]: Without dead ends: 4586 [2022-01-18 06:55:51,194 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 33 SyntacticMatches, 3 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1781 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=1018, Invalid=4682, Unknown=0, NotChecked=0, Total=5700 [2022-01-18 06:55:51,194 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 574 mSDsluCounter, 796 mSDsCounter, 0 mSdLazyCounter, 1546 mSolverCounterSat, 107 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 574 SdHoareTripleChecker+Valid, 375 SdHoareTripleChecker+Invalid, 1793 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 107 IncrementalHoareTripleChecker+Valid, 1546 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 140 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-18 06:55:51,194 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [574 Valid, 375 Invalid, 1793 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [107 Valid, 1546 Invalid, 0 Unknown, 140 Unchecked, 0.9s Time] [2022-01-18 06:55:51,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4586 states. [2022-01-18 06:55:51,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4586 to 2173. [2022-01-18 06:55:51,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2173 states, 2172 states have (on average 3.559852670349908) internal successors, (7732), 2172 states have internal predecessors, (7732), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:55:51,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2173 states to 2173 states and 7732 transitions. [2022-01-18 06:55:51,236 INFO L78 Accepts]: Start accepts. Automaton has 2173 states and 7732 transitions. Word has length 26 [2022-01-18 06:55:51,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:55:51,236 INFO L470 AbstractCegarLoop]: Abstraction has 2173 states and 7732 transitions. [2022-01-18 06:55:51,237 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.4642857142857144) internal successors, (69), 28 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) [2022-01-18 06:55:51,237 INFO L276 IsEmpty]: Start isEmpty. Operand 2173 states and 7732 transitions. [2022-01-18 06:55:51,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 06:55:51,240 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:55:51,240 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:55:51,256 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Forceful destruction successful, exit code 0 [2022-01-18 06:55:51,455 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2022-01-18 06:55:51,455 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 06:55:51,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:55:51,456 INFO L85 PathProgramCache]: Analyzing trace with hash 1377789112, now seen corresponding path program 9 times [2022-01-18 06:55:51,456 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:55:51,456 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [788135813] [2022-01-18 06:55:51,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:55:51,456 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:55:51,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:55:51,884 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:55:51,884 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:55:51,884 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [788135813] [2022-01-18 06:55:51,884 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [788135813] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:55:51,884 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [479246686] [2022-01-18 06:55:51,884 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 06:55:51,884 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:55:51,884 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:55:51,885 INFO L229 MonitoredProcess]: Starting monitored process 46 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 06:55:51,887 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2022-01-18 06:55:51,913 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 06:55:51,913 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:55:51,914 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2022-01-18 06:55:51,915 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:55:52,477 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:55:52,477 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:55:52,478 INFO L387 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 109 treesize of output 75 [2022-01-18 06:55:52,577 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:55:52,577 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:55:52,908 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:55:52,924 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 06:55:52,924 INFO L387 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 199 treesize of output 169 [2022-01-18 06:55:54,678 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:55:54,678 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [479246686] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:55:54,678 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:55:54,678 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-01-18 06:55:54,679 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1833134609] [2022-01-18 06:55:54,679 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:55:54,679 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-18 06:55:54,679 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:55:54,679 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-18 06:55:54,679 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=487, Unknown=0, NotChecked=0, Total=600 [2022-01-18 06:55:54,679 INFO L87 Difference]: Start difference. First operand 2173 states and 7732 transitions. Second operand has 25 states, 25 states have (on average 2.52) internal successors, (63), 25 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) [2022-01-18 06:55:59,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:55:59,220 INFO L93 Difference]: Finished difference Result 4709 states and 15097 transitions. [2022-01-18 06:55:59,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-01-18 06:55:59,220 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.52) internal successors, (63), 25 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 26 [2022-01-18 06:55:59,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:55:59,228 INFO L225 Difference]: With dead ends: 4709 [2022-01-18 06:55:59,228 INFO L226 Difference]: Without dead ends: 4687 [2022-01-18 06:55:59,229 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 34 SyntacticMatches, 4 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1614 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=954, Invalid=4016, Unknown=0, NotChecked=0, Total=4970 [2022-01-18 06:55:59,229 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 620 mSDsluCounter, 637 mSDsCounter, 0 mSdLazyCounter, 1269 mSolverCounterSat, 156 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 620 SdHoareTripleChecker+Valid, 324 SdHoareTripleChecker+Invalid, 1525 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 156 IncrementalHoareTripleChecker+Valid, 1269 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 100 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-18 06:55:59,229 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [620 Valid, 324 Invalid, 1525 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [156 Valid, 1269 Invalid, 0 Unknown, 100 Unchecked, 0.8s Time] [2022-01-18 06:55:59,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4687 states. [2022-01-18 06:55:59,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4687 to 2205. [2022-01-18 06:55:59,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2205 states, 2204 states have (on average 3.558076225045372) internal successors, (7842), 2204 states have internal predecessors, (7842), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:55:59,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2205 states to 2205 states and 7842 transitions. [2022-01-18 06:55:59,285 INFO L78 Accepts]: Start accepts. Automaton has 2205 states and 7842 transitions. Word has length 26 [2022-01-18 06:55:59,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:55:59,285 INFO L470 AbstractCegarLoop]: Abstraction has 2205 states and 7842 transitions. [2022-01-18 06:55:59,285 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.52) internal successors, (63), 25 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) [2022-01-18 06:55:59,285 INFO L276 IsEmpty]: Start isEmpty. Operand 2205 states and 7842 transitions. [2022-01-18 06:55:59,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 06:55:59,288 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:55:59,288 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:55:59,304 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Forceful destruction successful, exit code 0 [2022-01-18 06:55:59,490 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,SelfDestructingSolverStorable47 [2022-01-18 06:55:59,490 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 06:55:59,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:55:59,491 INFO L85 PathProgramCache]: Analyzing trace with hash 625931212, now seen corresponding path program 10 times [2022-01-18 06:55:59,491 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:55:59,491 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [244835233] [2022-01-18 06:55:59,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:55:59,491 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:55:59,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:55:59,742 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:55:59,742 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:55:59,742 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [244835233] [2022-01-18 06:55:59,742 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [244835233] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:55:59,742 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1274438556] [2022-01-18 06:55:59,743 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 06:55:59,743 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:55:59,743 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:55:59,744 INFO L229 MonitoredProcess]: Starting monitored process 47 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 06:55:59,744 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2022-01-18 06:55:59,765 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 06:55:59,765 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:55:59,766 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2022-01-18 06:55:59,767 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:56:00,253 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:56:00,254 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:56:00,255 INFO L387 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 109 treesize of output 75 [2022-01-18 06:56:00,326 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:56:00,326 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:56:00,602 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:56:00,615 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 06:56:00,616 INFO L387 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 193 treesize of output 163 [2022-01-18 06:56:02,261 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:56:02,261 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1274438556] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:56:02,261 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:56:02,261 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 23 [2022-01-18 06:56:02,261 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1558046156] [2022-01-18 06:56:02,261 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:56:02,262 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-18 06:56:02,262 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:56:02,262 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-18 06:56:02,262 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=411, Unknown=0, NotChecked=0, Total=506 [2022-01-18 06:56:02,262 INFO L87 Difference]: Start difference. First operand 2205 states and 7842 transitions. Second operand has 23 states, 23 states have (on average 2.5652173913043477) internal successors, (59), 23 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:56:06,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:56:06,628 INFO L93 Difference]: Finished difference Result 5001 states and 16066 transitions. [2022-01-18 06:56:06,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-01-18 06:56:06,628 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.5652173913043477) internal successors, (59), 23 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 26 [2022-01-18 06:56:06,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:56:06,636 INFO L225 Difference]: With dead ends: 5001 [2022-01-18 06:56:06,636 INFO L226 Difference]: Without dead ends: 4956 [2022-01-18 06:56:06,636 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 35 SyntacticMatches, 5 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1366 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=864, Invalid=3296, Unknown=0, NotChecked=0, Total=4160 [2022-01-18 06:56:06,637 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 524 mSDsluCounter, 725 mSDsCounter, 0 mSdLazyCounter, 1541 mSolverCounterSat, 136 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 524 SdHoareTripleChecker+Valid, 356 SdHoareTripleChecker+Invalid, 1677 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 136 IncrementalHoareTripleChecker+Valid, 1541 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-01-18 06:56:06,637 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [524 Valid, 356 Invalid, 1677 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [136 Valid, 1541 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-01-18 06:56:06,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4956 states. [2022-01-18 06:56:06,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4956 to 2233. [2022-01-18 06:56:06,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2233 states, 2232 states have (on average 3.568100358422939) internal successors, (7964), 2232 states have internal predecessors, (7964), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:56:06,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2233 states to 2233 states and 7964 transitions. [2022-01-18 06:56:06,679 INFO L78 Accepts]: Start accepts. Automaton has 2233 states and 7964 transitions. Word has length 26 [2022-01-18 06:56:06,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:56:06,680 INFO L470 AbstractCegarLoop]: Abstraction has 2233 states and 7964 transitions. [2022-01-18 06:56:06,680 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.5652173913043477) internal successors, (59), 23 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:56:06,680 INFO L276 IsEmpty]: Start isEmpty. Operand 2233 states and 7964 transitions. [2022-01-18 06:56:06,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 06:56:06,683 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:56:06,683 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:56:06,699 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Forceful destruction successful, exit code 0 [2022-01-18 06:56:06,898 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48,47 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:56:06,899 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 06:56:06,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:56:06,899 INFO L85 PathProgramCache]: Analyzing trace with hash -633075064, now seen corresponding path program 11 times [2022-01-18 06:56:06,899 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:56:06,899 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1103996112] [2022-01-18 06:56:06,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:56:06,899 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:56:06,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:56:07,146 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:56:07,146 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:56:07,146 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1103996112] [2022-01-18 06:56:07,146 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1103996112] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:56:07,146 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2105813079] [2022-01-18 06:56:07,146 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 06:56:07,146 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:56:07,147 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:56:07,149 INFO L229 MonitoredProcess]: Starting monitored process 48 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 06:56:07,150 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2022-01-18 06:56:07,172 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 06:56:07,172 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:56:07,172 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2022-01-18 06:56:07,173 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:56:07,583 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:56:07,589 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 06:56:07,589 INFO L387 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 109 treesize of output 83 [2022-01-18 06:56:07,925 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:56:07,926 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:56:08,322 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:56:08,340 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 06:56:08,341 INFO L387 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 187 treesize of output 157 [2022-01-18 06:56:09,362 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:56:09,362 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2105813079] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:56:09,362 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:56:09,362 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 26 [2022-01-18 06:56:09,362 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1870133433] [2022-01-18 06:56:09,363 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:56:09,363 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-18 06:56:09,363 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:56:09,363 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-18 06:56:09,363 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=552, Unknown=0, NotChecked=0, Total=650 [2022-01-18 06:56:09,363 INFO L87 Difference]: Start difference. First operand 2233 states and 7964 transitions. Second operand has 26 states, 26 states have (on average 2.3846153846153846) internal successors, (62), 26 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:56:24,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:56:24,502 INFO L93 Difference]: Finished difference Result 6778 states and 21601 transitions. [2022-01-18 06:56:24,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 109 states. [2022-01-18 06:56:24,502 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.3846153846153846) internal successors, (62), 26 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 26 [2022-01-18 06:56:24,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:56:24,513 INFO L225 Difference]: With dead ends: 6778 [2022-01-18 06:56:24,513 INFO L226 Difference]: Without dead ends: 6689 [2022-01-18 06:56:24,514 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 34 SyntacticMatches, 3 SemanticMatches, 128 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6083 ImplicationChecksByTransitivity, 13.9s TimeCoverageRelationStatistics Valid=2748, Invalid=14022, Unknown=0, NotChecked=0, Total=16770 [2022-01-18 06:56:24,515 INFO L933 BasicCegarLoop]: 50 mSDtfsCounter, 894 mSDsluCounter, 1263 mSDsCounter, 0 mSdLazyCounter, 2658 mSolverCounterSat, 195 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 894 SdHoareTripleChecker+Valid, 654 SdHoareTripleChecker+Invalid, 2853 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 195 IncrementalHoareTripleChecker+Valid, 2658 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-01-18 06:56:24,515 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [894 Valid, 654 Invalid, 2853 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [195 Valid, 2658 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-01-18 06:56:24,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6689 states. [2022-01-18 06:56:24,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6689 to 2299. [2022-01-18 06:56:24,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2299 states, 2298 states have (on average 3.594429939077459) internal successors, (8260), 2298 states have internal predecessors, (8260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:56:24,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2299 states to 2299 states and 8260 transitions. [2022-01-18 06:56:24,570 INFO L78 Accepts]: Start accepts. Automaton has 2299 states and 8260 transitions. Word has length 26 [2022-01-18 06:56:24,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:56:24,570 INFO L470 AbstractCegarLoop]: Abstraction has 2299 states and 8260 transitions. [2022-01-18 06:56:24,571 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.3846153846153846) internal successors, (62), 26 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:56:24,571 INFO L276 IsEmpty]: Start isEmpty. Operand 2299 states and 8260 transitions. [2022-01-18 06:56:24,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 06:56:24,574 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:56:24,574 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:56:24,592 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Forceful destruction successful, exit code 0 [2022-01-18 06:56:24,789 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2022-01-18 06:56:24,789 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 06:56:24,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:56:24,789 INFO L85 PathProgramCache]: Analyzing trace with hash -1129796424, now seen corresponding path program 12 times [2022-01-18 06:56:24,789 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:56:24,789 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [63053787] [2022-01-18 06:56:24,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:56:24,789 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:56:24,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:56:25,144 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:56:25,144 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:56:25,144 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [63053787] [2022-01-18 06:56:25,144 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [63053787] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:56:25,144 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1881102328] [2022-01-18 06:56:25,144 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 06:56:25,144 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:56:25,144 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:56:25,146 INFO L229 MonitoredProcess]: Starting monitored process 49 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 06:56:25,147 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2022-01-18 06:56:25,171 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 06:56:25,171 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:56:25,172 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-18 06:56:25,172 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:56:25,647 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:56:25,651 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 06:56:25,651 INFO L387 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 109 treesize of output 83 [2022-01-18 06:56:25,986 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:56:25,986 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:56:26,453 INFO L353 Elim1Store]: treesize reduction 10, result has 81.8 percent of original size [2022-01-18 06:56:26,453 INFO L387 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 187 treesize of output 157 [2022-01-18 06:56:27,818 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:56:27,818 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1881102328] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:56:27,818 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:56:27,818 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 26 [2022-01-18 06:56:27,818 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [835775312] [2022-01-18 06:56:27,818 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:56:27,818 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-18 06:56:27,818 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:56:27,819 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-18 06:56:27,819 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=555, Unknown=0, NotChecked=0, Total=650 [2022-01-18 06:56:27,819 INFO L87 Difference]: Start difference. First operand 2299 states and 8260 transitions. Second operand has 26 states, 26 states have (on average 2.576923076923077) internal successors, (67), 26 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) [2022-01-18 06:56:34,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:56:34,928 INFO L93 Difference]: Finished difference Result 4933 states and 16145 transitions. [2022-01-18 06:56:34,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2022-01-18 06:56:34,929 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.576923076923077) internal successors, (67), 26 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 26 [2022-01-18 06:56:34,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:56:34,936 INFO L225 Difference]: With dead ends: 4933 [2022-01-18 06:56:34,936 INFO L226 Difference]: Without dead ends: 4888 [2022-01-18 06:56:34,937 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3109 ImplicationChecksByTransitivity, 6.2s TimeCoverageRelationStatistics Valid=1369, Invalid=8137, Unknown=0, NotChecked=0, Total=9506 [2022-01-18 06:56:34,937 INFO L933 BasicCegarLoop]: 45 mSDtfsCounter, 425 mSDsluCounter, 999 mSDsCounter, 0 mSdLazyCounter, 2416 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 425 SdHoareTripleChecker+Valid, 539 SdHoareTripleChecker+Invalid, 2477 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 2416 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-01-18 06:56:34,937 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [425 Valid, 539 Invalid, 2477 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 2416 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-01-18 06:56:34,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4888 states. [2022-01-18 06:56:34,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4888 to 2312. [2022-01-18 06:56:34,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2312 states, 2311 states have (on average 3.5980095196884467) internal successors, (8315), 2311 states have internal predecessors, (8315), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:56:34,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2312 states to 2312 states and 8315 transitions. [2022-01-18 06:56:34,981 INFO L78 Accepts]: Start accepts. Automaton has 2312 states and 8315 transitions. Word has length 26 [2022-01-18 06:56:34,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:56:34,981 INFO L470 AbstractCegarLoop]: Abstraction has 2312 states and 8315 transitions. [2022-01-18 06:56:34,981 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.576923076923077) internal successors, (67), 26 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) [2022-01-18 06:56:34,981 INFO L276 IsEmpty]: Start isEmpty. Operand 2312 states and 8315 transitions. [2022-01-18 06:56:34,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 06:56:34,985 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:56:34,985 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:56:35,000 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Forceful destruction successful, exit code 0 [2022-01-18 06:56:35,200 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,49 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:56:35,200 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 06:56:35,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:56:35,200 INFO L85 PathProgramCache]: Analyzing trace with hash -235126068, now seen corresponding path program 13 times [2022-01-18 06:56:35,200 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:56:35,200 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [830579776] [2022-01-18 06:56:35,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:56:35,201 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:56:35,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:56:35,547 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:56:35,547 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:56:35,547 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [830579776] [2022-01-18 06:56:35,547 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [830579776] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:56:35,547 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [951900210] [2022-01-18 06:56:35,547 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 06:56:35,548 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:56:35,548 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:56:35,548 INFO L229 MonitoredProcess]: Starting monitored process 50 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 06:56:35,549 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2022-01-18 06:56:35,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:56:35,576 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-18 06:56:35,576 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:56:36,091 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:56:36,091 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:56:36,092 INFO L387 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 109 treesize of output 75 [2022-01-18 06:56:36,177 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:56:36,177 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:56:36,584 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:56:36,606 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 06:56:36,606 INFO L387 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 199 treesize of output 169 [2022-01-18 06:56:37,946 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:56:37,947 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [951900210] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:56:37,947 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:56:37,947 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-01-18 06:56:37,947 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [303870924] [2022-01-18 06:56:37,947 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:56:37,947 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-18 06:56:37,947 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:56:37,947 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-18 06:56:37,947 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=474, Unknown=0, NotChecked=0, Total=600 [2022-01-18 06:56:37,948 INFO L87 Difference]: Start difference. First operand 2312 states and 8315 transitions. Second operand has 25 states, 25 states have (on average 2.56) internal successors, (64), 25 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:56:43,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:56:43,650 INFO L93 Difference]: Finished difference Result 6125 states and 19207 transitions. [2022-01-18 06:56:43,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2022-01-18 06:56:43,650 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.56) internal successors, (64), 25 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-01-18 06:56:43,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:56:43,660 INFO L225 Difference]: With dead ends: 6125 [2022-01-18 06:56:43,660 INFO L226 Difference]: Without dead ends: 6081 [2022-01-18 06:56:43,660 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 37 SyntacticMatches, 5 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2153 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=1421, Invalid=4899, Unknown=0, NotChecked=0, Total=6320 [2022-01-18 06:56:43,661 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 769 mSDsluCounter, 824 mSDsCounter, 0 mSdLazyCounter, 1479 mSolverCounterSat, 164 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 769 SdHoareTripleChecker+Valid, 479 SdHoareTripleChecker+Invalid, 1753 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 164 IncrementalHoareTripleChecker+Valid, 1479 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 110 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-01-18 06:56:43,662 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [769 Valid, 479 Invalid, 1753 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [164 Valid, 1479 Invalid, 0 Unknown, 110 Unchecked, 1.0s Time] [2022-01-18 06:56:43,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6081 states. [2022-01-18 06:56:43,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6081 to 2365. [2022-01-18 06:56:43,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2365 states, 2364 states have (on average 3.6099830795262267) internal successors, (8534), 2364 states have internal predecessors, (8534), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:56:43,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2365 states to 2365 states and 8534 transitions. [2022-01-18 06:56:43,749 INFO L78 Accepts]: Start accepts. Automaton has 2365 states and 8534 transitions. Word has length 26 [2022-01-18 06:56:43,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:56:43,749 INFO L470 AbstractCegarLoop]: Abstraction has 2365 states and 8534 transitions. [2022-01-18 06:56:43,749 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.56) internal successors, (64), 25 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:56:43,749 INFO L276 IsEmpty]: Start isEmpty. Operand 2365 states and 8534 transitions. [2022-01-18 06:56:43,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 06:56:43,755 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:56:43,755 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:56:43,780 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Forceful destruction successful, exit code 0 [2022-01-18 06:56:43,964 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,SelfDestructingSolverStorable51 [2022-01-18 06:56:43,964 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 06:56:43,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:56:43,965 INFO L85 PathProgramCache]: Analyzing trace with hash -1729033790, now seen corresponding path program 14 times [2022-01-18 06:56:43,965 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:56:43,965 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1388944738] [2022-01-18 06:56:43,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:56:43,965 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:56:43,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:56:44,356 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:56:44,357 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:56:44,357 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1388944738] [2022-01-18 06:56:44,357 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1388944738] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:56:44,357 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1999783663] [2022-01-18 06:56:44,357 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 06:56:44,357 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:56:44,357 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:56:44,358 INFO L229 MonitoredProcess]: Starting monitored process 51 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 06:56:44,359 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2022-01-18 06:56:44,381 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 06:56:44,381 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:56:44,381 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2022-01-18 06:56:44,382 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:56:44,891 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:56:44,896 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 06:56:44,896 INFO L387 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 109 treesize of output 83 [2022-01-18 06:56:45,183 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:56:45,183 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:56:45,616 INFO L353 Elim1Store]: treesize reduction 10, result has 81.8 percent of original size [2022-01-18 06:56:45,617 INFO L387 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 187 treesize of output 157 [2022-01-18 06:56:47,120 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:56:47,120 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1999783663] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:56:47,120 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:56:47,120 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 26 [2022-01-18 06:56:47,120 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1670300034] [2022-01-18 06:56:47,120 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:56:47,120 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-18 06:56:47,120 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:56:47,120 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-18 06:56:47,121 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=548, Unknown=0, NotChecked=0, Total=650 [2022-01-18 06:56:47,121 INFO L87 Difference]: Start difference. First operand 2365 states and 8534 transitions. Second operand has 26 states, 26 states have (on average 2.6153846153846154) internal successors, (68), 26 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:56:55,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:56:55,958 INFO L93 Difference]: Finished difference Result 5571 states and 17968 transitions. [2022-01-18 06:56:55,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2022-01-18 06:56:55,959 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.6153846153846154) internal successors, (68), 26 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-01-18 06:56:55,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:56:55,968 INFO L225 Difference]: With dead ends: 5571 [2022-01-18 06:56:55,969 INFO L226 Difference]: Without dead ends: 5526 [2022-01-18 06:56:55,969 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3979 ImplicationChecksByTransitivity, 7.7s TimeCoverageRelationStatistics Valid=1669, Invalid=9673, Unknown=0, NotChecked=0, Total=11342 [2022-01-18 06:56:55,969 INFO L933 BasicCegarLoop]: 48 mSDtfsCounter, 601 mSDsluCounter, 1236 mSDsCounter, 0 mSdLazyCounter, 2860 mSolverCounterSat, 113 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 601 SdHoareTripleChecker+Valid, 700 SdHoareTripleChecker+Invalid, 2973 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 113 IncrementalHoareTripleChecker+Valid, 2860 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-01-18 06:56:55,970 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [601 Valid, 700 Invalid, 2973 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [113 Valid, 2860 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-01-18 06:56:55,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5526 states. [2022-01-18 06:56:56,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5526 to 2349. [2022-01-18 06:56:56,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2349 states, 2348 states have (on average 3.610732538330494) internal successors, (8478), 2348 states have internal predecessors, (8478), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:56:56,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2349 states to 2349 states and 8478 transitions. [2022-01-18 06:56:56,020 INFO L78 Accepts]: Start accepts. Automaton has 2349 states and 8478 transitions. Word has length 26 [2022-01-18 06:56:56,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:56:56,020 INFO L470 AbstractCegarLoop]: Abstraction has 2349 states and 8478 transitions. [2022-01-18 06:56:56,020 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.6153846153846154) internal successors, (68), 26 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:56:56,020 INFO L276 IsEmpty]: Start isEmpty. Operand 2349 states and 8478 transitions. [2022-01-18 06:56:56,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 06:56:56,023 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:56:56,023 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:56:56,039 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Forceful destruction successful, exit code 0 [2022-01-18 06:56:56,234 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,SelfDestructingSolverStorable52 [2022-01-18 06:56:56,234 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 06:56:56,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:56:56,234 INFO L85 PathProgramCache]: Analyzing trace with hash 555566964, now seen corresponding path program 15 times [2022-01-18 06:56:56,234 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:56:56,235 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1538669992] [2022-01-18 06:56:56,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:56:56,235 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:56:56,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:56:56,447 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:56:56,448 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:56:56,448 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1538669992] [2022-01-18 06:56:56,448 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1538669992] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:56:56,448 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1553820608] [2022-01-18 06:56:56,448 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 06:56:56,448 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:56:56,448 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:56:56,449 INFO L229 MonitoredProcess]: Starting monitored process 52 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 06:56:56,449 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2022-01-18 06:56:56,474 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 06:56:56,474 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:56:56,474 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2022-01-18 06:56:56,475 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:56:56,827 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 06:56:56,827 INFO L387 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 109 treesize of output 91 [2022-01-18 06:56:57,252 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:56:57,253 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:56:57,703 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:56:57,705 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:56:57,718 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 06:56:57,718 INFO L387 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 187 treesize of output 149 [2022-01-18 06:56:58,443 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:56:58,443 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1553820608] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:56:58,443 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:56:58,443 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12, 12] total 28 [2022-01-18 06:56:58,443 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1522319897] [2022-01-18 06:56:58,443 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:56:58,444 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-01-18 06:56:58,444 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:56:58,444 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-01-18 06:56:58,444 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=648, Unknown=0, NotChecked=0, Total=756 [2022-01-18 06:56:58,444 INFO L87 Difference]: Start difference. First operand 2349 states and 8478 transitions. Second operand has 28 states, 28 states have (on average 2.4642857142857144) internal successors, (69), 28 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) [2022-01-18 06:57:02,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:57:02,547 INFO L93 Difference]: Finished difference Result 4351 states and 14603 transitions. [2022-01-18 06:57:02,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-01-18 06:57:02,547 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.4642857142857144) internal successors, (69), 28 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 26 [2022-01-18 06:57:02,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:57:02,554 INFO L225 Difference]: With dead ends: 4351 [2022-01-18 06:57:02,555 INFO L226 Difference]: Without dead ends: 4315 [2022-01-18 06:57:02,555 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 33 SyntacticMatches, 2 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1282 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=751, Invalid=3941, Unknown=0, NotChecked=0, Total=4692 [2022-01-18 06:57:02,555 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 600 mSDsluCounter, 715 mSDsCounter, 0 mSdLazyCounter, 1692 mSolverCounterSat, 85 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 600 SdHoareTripleChecker+Valid, 314 SdHoareTripleChecker+Invalid, 1777 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 85 IncrementalHoareTripleChecker+Valid, 1692 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-18 06:57:02,555 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [600 Valid, 314 Invalid, 1777 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [85 Valid, 1692 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-18 06:57:02,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4315 states. [2022-01-18 06:57:02,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4315 to 2350. [2022-01-18 06:57:02,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2350 states, 2349 states have (on average 3.609621115368242) internal successors, (8479), 2349 states have internal predecessors, (8479), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:57:02,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2350 states to 2350 states and 8479 transitions. [2022-01-18 06:57:02,597 INFO L78 Accepts]: Start accepts. Automaton has 2350 states and 8479 transitions. Word has length 26 [2022-01-18 06:57:02,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:57:02,597 INFO L470 AbstractCegarLoop]: Abstraction has 2350 states and 8479 transitions. [2022-01-18 06:57:02,597 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.4642857142857144) internal successors, (69), 28 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) [2022-01-18 06:57:02,597 INFO L276 IsEmpty]: Start isEmpty. Operand 2350 states and 8479 transitions. [2022-01-18 06:57:02,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 06:57:02,600 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:57:02,601 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:57:02,618 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Forceful destruction successful, exit code 0 [2022-01-18 06:57:02,808 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,52 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:57:02,808 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 06:57:02,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:57:02,809 INFO L85 PathProgramCache]: Analyzing trace with hash 1636584436, now seen corresponding path program 16 times [2022-01-18 06:57:02,809 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:57:02,809 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2047446930] [2022-01-18 06:57:02,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:57:02,809 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:57:02,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:57:03,166 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:57:03,166 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:57:03,166 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2047446930] [2022-01-18 06:57:03,166 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2047446930] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:57:03,166 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1272748641] [2022-01-18 06:57:03,166 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 06:57:03,166 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:57:03,166 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:57:03,167 INFO L229 MonitoredProcess]: Starting monitored process 53 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 06:57:03,168 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2022-01-18 06:57:03,189 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 06:57:03,190 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:57:03,190 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-18 06:57:03,190 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:57:03,646 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:57:03,649 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 06:57:03,649 INFO L387 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 109 treesize of output 83 [2022-01-18 06:57:03,931 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:57:03,931 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:57:04,493 INFO L353 Elim1Store]: treesize reduction 10, result has 81.8 percent of original size [2022-01-18 06:57:04,493 INFO L387 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 187 treesize of output 157 [2022-01-18 06:57:05,818 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:57:05,818 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1272748641] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:57:05,818 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:57:05,818 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 26 [2022-01-18 06:57:05,818 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [303245205] [2022-01-18 06:57:05,818 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:57:05,818 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-18 06:57:05,818 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:57:05,819 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-18 06:57:05,819 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=554, Unknown=0, NotChecked=0, Total=650 [2022-01-18 06:57:05,819 INFO L87 Difference]: Start difference. First operand 2350 states and 8479 transitions. Second operand has 26 states, 26 states have (on average 2.576923076923077) internal successors, (67), 26 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) [2022-01-18 06:57:10,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:57:10,845 INFO L93 Difference]: Finished difference Result 4695 states and 15501 transitions. [2022-01-18 06:57:10,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2022-01-18 06:57:10,845 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.576923076923077) internal successors, (67), 26 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 26 [2022-01-18 06:57:10,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:57:10,852 INFO L225 Difference]: With dead ends: 4695 [2022-01-18 06:57:10,852 INFO L226 Difference]: Without dead ends: 4658 [2022-01-18 06:57:10,853 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2248 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=955, Invalid=6185, Unknown=0, NotChecked=0, Total=7140 [2022-01-18 06:57:10,853 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 335 mSDsluCounter, 861 mSDsCounter, 0 mSdLazyCounter, 2094 mSolverCounterSat, 70 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 335 SdHoareTripleChecker+Valid, 440 SdHoareTripleChecker+Invalid, 2164 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 2094 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-01-18 06:57:10,853 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [335 Valid, 440 Invalid, 2164 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [70 Valid, 2094 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-01-18 06:57:10,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4658 states. [2022-01-18 06:57:10,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4658 to 2367. [2022-01-18 06:57:10,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2367 states, 2366 states have (on average 3.60989010989011) internal successors, (8541), 2366 states have internal predecessors, (8541), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:57:10,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2367 states to 2367 states and 8541 transitions. [2022-01-18 06:57:10,895 INFO L78 Accepts]: Start accepts. Automaton has 2367 states and 8541 transitions. Word has length 26 [2022-01-18 06:57:10,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:57:10,895 INFO L470 AbstractCegarLoop]: Abstraction has 2367 states and 8541 transitions. [2022-01-18 06:57:10,895 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.576923076923077) internal successors, (67), 26 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) [2022-01-18 06:57:10,895 INFO L276 IsEmpty]: Start isEmpty. Operand 2367 states and 8541 transitions. [2022-01-18 06:57:10,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 06:57:10,898 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:57:10,898 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:57:10,915 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Ended with exit code 0 [2022-01-18 06:57:11,107 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,SelfDestructingSolverStorable54 [2022-01-18 06:57:11,107 INFO L402 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 06:57:11,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:57:11,107 INFO L85 PathProgramCache]: Analyzing trace with hash 884726536, now seen corresponding path program 17 times [2022-01-18 06:57:11,108 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:57:11,108 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1297031881] [2022-01-18 06:57:11,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:57:11,108 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:57:11,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:57:11,345 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:57:11,346 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:57:11,346 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1297031881] [2022-01-18 06:57:11,346 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1297031881] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:57:11,346 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [299705532] [2022-01-18 06:57:11,346 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 06:57:11,346 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:57:11,346 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:57:11,347 INFO L229 MonitoredProcess]: Starting monitored process 54 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 06:57:11,348 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2022-01-18 06:57:11,369 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 06:57:11,369 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:57:11,369 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2022-01-18 06:57:11,370 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:57:11,754 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:57:11,758 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 06:57:11,758 INFO L387 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 109 treesize of output 83 [2022-01-18 06:57:12,060 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:57:12,061 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:57:12,570 INFO L353 Elim1Store]: treesize reduction 10, result has 81.8 percent of original size [2022-01-18 06:57:12,570 INFO L387 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 187 treesize of output 157 [2022-01-18 06:57:13,435 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:57:13,435 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [299705532] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:57:13,435 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:57:13,435 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 26 [2022-01-18 06:57:13,435 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [512707342] [2022-01-18 06:57:13,435 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:57:13,436 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-18 06:57:13,436 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:57:13,436 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-18 06:57:13,436 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=558, Unknown=0, NotChecked=0, Total=650 [2022-01-18 06:57:13,436 INFO L87 Difference]: Start difference. First operand 2367 states and 8541 transitions. Second operand has 26 states, 26 states have (on average 2.576923076923077) internal successors, (67), 26 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) [2022-01-18 06:57:19,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:57:19,460 INFO L93 Difference]: Finished difference Result 4916 states and 16318 transitions. [2022-01-18 06:57:19,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2022-01-18 06:57:19,460 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.576923076923077) internal successors, (67), 26 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 26 [2022-01-18 06:57:19,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:57:19,469 INFO L225 Difference]: With dead ends: 4916 [2022-01-18 06:57:19,469 INFO L226 Difference]: Without dead ends: 4871 [2022-01-18 06:57:19,470 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2548 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=1088, Invalid=6922, Unknown=0, NotChecked=0, Total=8010 [2022-01-18 06:57:19,470 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 383 mSDsluCounter, 1008 mSDsCounter, 0 mSdLazyCounter, 2323 mSolverCounterSat, 75 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 383 SdHoareTripleChecker+Valid, 511 SdHoareTripleChecker+Invalid, 2398 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 2323 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-01-18 06:57:19,476 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [383 Valid, 511 Invalid, 2398 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [75 Valid, 2323 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-01-18 06:57:19,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4871 states. [2022-01-18 06:57:19,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4871 to 2367. [2022-01-18 06:57:19,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2367 states, 2366 states have (on average 3.60989010989011) internal successors, (8541), 2366 states have internal predecessors, (8541), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:57:19,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2367 states to 2367 states and 8541 transitions. [2022-01-18 06:57:19,547 INFO L78 Accepts]: Start accepts. Automaton has 2367 states and 8541 transitions. Word has length 26 [2022-01-18 06:57:19,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:57:19,547 INFO L470 AbstractCegarLoop]: Abstraction has 2367 states and 8541 transitions. [2022-01-18 06:57:19,548 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.576923076923077) internal successors, (67), 26 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) [2022-01-18 06:57:19,548 INFO L276 IsEmpty]: Start isEmpty. Operand 2367 states and 8541 transitions. [2022-01-18 06:57:19,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 06:57:19,551 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:57:19,551 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:57:19,566 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Forceful destruction successful, exit code 0 [2022-01-18 06:57:19,759 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2022-01-18 06:57:19,759 INFO L402 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 06:57:19,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:57:19,760 INFO L85 PathProgramCache]: Analyzing trace with hash 347233680, now seen corresponding path program 18 times [2022-01-18 06:57:19,760 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:57:19,760 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [140586385] [2022-01-18 06:57:19,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:57:19,760 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:57:19,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:57:20,025 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:57:20,025 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:57:20,025 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [140586385] [2022-01-18 06:57:20,025 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [140586385] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:57:20,025 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [902770645] [2022-01-18 06:57:20,025 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 06:57:20,025 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:57:20,026 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:57:20,042 INFO L229 MonitoredProcess]: Starting monitored process 55 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 06:57:20,055 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2022-01-18 06:57:20,076 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 06:57:20,076 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:57:20,076 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2022-01-18 06:57:20,077 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:57:20,442 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:57:20,442 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:57:20,443 INFO L387 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 109 treesize of output 75 [2022-01-18 06:57:20,516 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:57:20,516 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:57:21,000 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:57:21,019 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 06:57:21,019 INFO L387 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 195 treesize of output 161 [2022-01-18 06:57:22,092 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:57:22,092 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [902770645] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:57:22,092 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:57:22,092 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 24 [2022-01-18 06:57:22,092 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [69802865] [2022-01-18 06:57:22,092 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:57:22,092 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-18 06:57:22,092 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:57:22,093 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-18 06:57:22,093 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=458, Unknown=0, NotChecked=0, Total=552 [2022-01-18 06:57:22,094 INFO L87 Difference]: Start difference. First operand 2367 states and 8541 transitions. Second operand has 24 states, 24 states have (on average 2.5) internal successors, (60), 24 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:57:25,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:57:25,396 INFO L93 Difference]: Finished difference Result 4624 states and 15091 transitions. [2022-01-18 06:57:25,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-01-18 06:57:25,396 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.5) internal successors, (60), 24 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 26 [2022-01-18 06:57:25,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:57:25,404 INFO L225 Difference]: With dead ends: 4624 [2022-01-18 06:57:25,404 INFO L226 Difference]: Without dead ends: 4496 [2022-01-18 06:57:25,404 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 35 SyntacticMatches, 4 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1162 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=685, Invalid=3097, Unknown=0, NotChecked=0, Total=3782 [2022-01-18 06:57:25,408 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 398 mSDsluCounter, 667 mSDsCounter, 0 mSdLazyCounter, 1354 mSolverCounterSat, 95 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 398 SdHoareTripleChecker+Valid, 373 SdHoareTripleChecker+Invalid, 1449 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 95 IncrementalHoareTripleChecker+Valid, 1354 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-18 06:57:25,408 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [398 Valid, 373 Invalid, 1449 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [95 Valid, 1354 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-18 06:57:25,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4496 states. [2022-01-18 06:57:25,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4496 to 2506. [2022-01-18 06:57:25,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2506 states, 2505 states have (on average 3.596806387225549) internal successors, (9010), 2505 states have internal predecessors, (9010), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:57:25,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2506 states to 2506 states and 9010 transitions. [2022-01-18 06:57:25,451 INFO L78 Accepts]: Start accepts. Automaton has 2506 states and 9010 transitions. Word has length 26 [2022-01-18 06:57:25,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:57:25,451 INFO L470 AbstractCegarLoop]: Abstraction has 2506 states and 9010 transitions. [2022-01-18 06:57:25,451 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.5) internal successors, (60), 24 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:57:25,451 INFO L276 IsEmpty]: Start isEmpty. Operand 2506 states and 9010 transitions. [2022-01-18 06:57:25,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 06:57:25,454 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:57:25,454 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:57:25,470 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Forceful destruction successful, exit code 0 [2022-01-18 06:57:25,670 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56,55 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:57:25,670 INFO L402 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 06:57:25,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:57:25,670 INFO L85 PathProgramCache]: Analyzing trace with hash -911772596, now seen corresponding path program 19 times [2022-01-18 06:57:25,670 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:57:25,670 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1737311013] [2022-01-18 06:57:25,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:57:25,670 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:57:25,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:57:25,942 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:57:25,942 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:57:25,942 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1737311013] [2022-01-18 06:57:25,942 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1737311013] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:57:25,942 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [347134522] [2022-01-18 06:57:25,942 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 06:57:25,943 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:57:25,943 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:57:25,944 INFO L229 MonitoredProcess]: Starting monitored process 56 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 06:57:25,945 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2022-01-18 06:57:25,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:57:25,982 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-18 06:57:25,983 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:57:26,332 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:57:26,336 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 06:57:26,336 INFO L387 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 109 treesize of output 83 [2022-01-18 06:57:26,657 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:57:26,657 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:57:27,181 INFO L353 Elim1Store]: treesize reduction 10, result has 81.8 percent of original size [2022-01-18 06:57:27,181 INFO L387 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 191 treesize of output 157 [2022-01-18 06:57:29,239 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:57:29,239 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [347134522] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:57:29,240 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:57:29,240 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 26 [2022-01-18 06:57:29,240 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1722256823] [2022-01-18 06:57:29,240 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:57:29,240 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-18 06:57:29,240 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:57:29,240 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-18 06:57:29,240 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=546, Unknown=0, NotChecked=0, Total=650 [2022-01-18 06:57:29,240 INFO L87 Difference]: Start difference. First operand 2506 states and 9010 transitions. Second operand has 26 states, 26 states have (on average 2.576923076923077) internal successors, (67), 26 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) [2022-01-18 06:57:38,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:57:38,435 INFO L93 Difference]: Finished difference Result 5800 states and 18884 transitions. [2022-01-18 06:57:38,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2022-01-18 06:57:38,435 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.576923076923077) internal successors, (67), 26 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 26 [2022-01-18 06:57:38,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:57:38,444 INFO L225 Difference]: With dead ends: 5800 [2022-01-18 06:57:38,445 INFO L226 Difference]: Without dead ends: 5700 [2022-01-18 06:57:38,445 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4166 ImplicationChecksByTransitivity, 8.6s TimeCoverageRelationStatistics Valid=1785, Invalid=10205, Unknown=0, NotChecked=0, Total=11990 [2022-01-18 06:57:38,447 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 515 mSDsluCounter, 870 mSDsCounter, 0 mSdLazyCounter, 1958 mSolverCounterSat, 105 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 515 SdHoareTripleChecker+Valid, 439 SdHoareTripleChecker+Invalid, 2063 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 105 IncrementalHoareTripleChecker+Valid, 1958 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-01-18 06:57:38,447 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [515 Valid, 439 Invalid, 2063 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [105 Valid, 1958 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-01-18 06:57:38,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5700 states. [2022-01-18 06:57:38,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5700 to 2558. [2022-01-18 06:57:38,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2558 states, 2557 states have (on average 3.5936644505279625) internal successors, (9189), 2557 states have internal predecessors, (9189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:57:38,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2558 states to 2558 states and 9189 transitions. [2022-01-18 06:57:38,533 INFO L78 Accepts]: Start accepts. Automaton has 2558 states and 9189 transitions. Word has length 26 [2022-01-18 06:57:38,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:57:38,534 INFO L470 AbstractCegarLoop]: Abstraction has 2558 states and 9189 transitions. [2022-01-18 06:57:38,534 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.576923076923077) internal successors, (67), 26 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) [2022-01-18 06:57:38,534 INFO L276 IsEmpty]: Start isEmpty. Operand 2558 states and 9189 transitions. [2022-01-18 06:57:38,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 06:57:38,539 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:57:38,539 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:57:38,562 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Ended with exit code 0 [2022-01-18 06:57:38,740 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57,56 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:57:38,740 INFO L402 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 06:57:38,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:57:38,741 INFO L85 PathProgramCache]: Analyzing trace with hash 1454516880, now seen corresponding path program 20 times [2022-01-18 06:57:38,741 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:57:38,741 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1068843591] [2022-01-18 06:57:38,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:57:38,741 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:57:38,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:57:39,122 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:57:39,122 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:57:39,123 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1068843591] [2022-01-18 06:57:39,123 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1068843591] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:57:39,123 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [790278276] [2022-01-18 06:57:39,123 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 06:57:39,123 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:57:39,123 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:57:39,124 INFO L229 MonitoredProcess]: Starting monitored process 57 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 06:57:39,126 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2022-01-18 06:57:39,157 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 06:57:39,157 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:57:39,158 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2022-01-18 06:57:39,159 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:57:39,610 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:57:39,618 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 06:57:39,618 INFO L387 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 109 treesize of output 91 [2022-01-18 06:57:40,270 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:57:40,270 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:57:40,827 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 06:57:40,827 INFO L387 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 171 treesize of output 161 [2022-01-18 06:57:44,216 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:57:44,216 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [790278276] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:57:44,216 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:57:44,216 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 11] total 27 [2022-01-18 06:57:44,216 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2121518541] [2022-01-18 06:57:44,216 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:57:44,216 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-01-18 06:57:44,216 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:57:44,217 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-01-18 06:57:44,217 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=597, Unknown=0, NotChecked=0, Total=702 [2022-01-18 06:57:44,217 INFO L87 Difference]: Start difference. First operand 2558 states and 9189 transitions. Second operand has 27 states, 27 states have (on average 2.4814814814814814) internal successors, (67), 27 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) [2022-01-18 06:57:50,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:57:50,045 INFO L93 Difference]: Finished difference Result 5226 states and 17045 transitions. [2022-01-18 06:57:50,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2022-01-18 06:57:50,045 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.4814814814814814) internal successors, (67), 27 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 26 [2022-01-18 06:57:50,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:57:50,054 INFO L225 Difference]: With dead ends: 5226 [2022-01-18 06:57:50,054 INFO L226 Difference]: Without dead ends: 5114 [2022-01-18 06:57:50,054 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2213 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=1207, Invalid=5765, Unknown=0, NotChecked=0, Total=6972 [2022-01-18 06:57:50,054 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 491 mSDsluCounter, 601 mSDsCounter, 0 mSdLazyCounter, 1269 mSolverCounterSat, 109 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 491 SdHoareTripleChecker+Valid, 326 SdHoareTripleChecker+Invalid, 1627 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 109 IncrementalHoareTripleChecker+Valid, 1269 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 249 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-18 06:57:50,054 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [491 Valid, 326 Invalid, 1627 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [109 Valid, 1269 Invalid, 0 Unknown, 249 Unchecked, 0.8s Time] [2022-01-18 06:57:50,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5114 states. [2022-01-18 06:57:50,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5114 to 2608. [2022-01-18 06:57:50,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2608 states, 2607 states have (on average 3.6006904487917146) internal successors, (9387), 2607 states have internal predecessors, (9387), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:57:50,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2608 states to 2608 states and 9387 transitions. [2022-01-18 06:57:50,100 INFO L78 Accepts]: Start accepts. Automaton has 2608 states and 9387 transitions. Word has length 26 [2022-01-18 06:57:50,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:57:50,100 INFO L470 AbstractCegarLoop]: Abstraction has 2608 states and 9387 transitions. [2022-01-18 06:57:50,100 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.4814814814814814) internal successors, (67), 27 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) [2022-01-18 06:57:50,100 INFO L276 IsEmpty]: Start isEmpty. Operand 2608 states and 9387 transitions. [2022-01-18 06:57:50,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 06:57:50,103 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:57:50,104 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:57:50,119 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Forceful destruction successful, exit code 0 [2022-01-18 06:57:50,316 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58,57 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:57:50,316 INFO L402 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 06:57:50,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:57:50,317 INFO L85 PathProgramCache]: Analyzing trace with hash 920481968, now seen corresponding path program 21 times [2022-01-18 06:57:50,317 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:57:50,317 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1044326287] [2022-01-18 06:57:50,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:57:50,317 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:57:50,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:57:50,612 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:57:50,612 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:57:50,612 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1044326287] [2022-01-18 06:57:50,613 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1044326287] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:57:50,613 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1410092909] [2022-01-18 06:57:50,613 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 06:57:50,613 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:57:50,613 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:57:50,614 INFO L229 MonitoredProcess]: Starting monitored process 58 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 06:57:50,614 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Waiting until timeout for monitored process [2022-01-18 06:57:50,636 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 06:57:50,636 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:57:50,636 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2022-01-18 06:57:50,637 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:57:51,180 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:57:51,180 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:57:51,181 INFO L387 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 109 treesize of output 75 [2022-01-18 06:57:51,334 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:57:51,334 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:57:51,867 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:57:51,886 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 06:57:51,886 INFO L387 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 203 treesize of output 169 [2022-01-18 06:57:53,147 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:57:53,147 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1410092909] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:57:53,147 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:57:53,148 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 24 [2022-01-18 06:57:53,148 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1928212695] [2022-01-18 06:57:53,148 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:57:53,148 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-18 06:57:53,148 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:57:53,148 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-18 06:57:53,148 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=453, Unknown=0, NotChecked=0, Total=552 [2022-01-18 06:57:53,148 INFO L87 Difference]: Start difference. First operand 2608 states and 9387 transitions. Second operand has 24 states, 24 states have (on average 2.5416666666666665) internal successors, (61), 24 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) [2022-01-18 06:57:55,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:57:55,940 INFO L93 Difference]: Finished difference Result 4659 states and 15432 transitions. [2022-01-18 06:57:55,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-01-18 06:57:55,940 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.5416666666666665) internal successors, (61), 24 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 26 [2022-01-18 06:57:55,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:57:55,947 INFO L225 Difference]: With dead ends: 4659 [2022-01-18 06:57:55,947 INFO L226 Difference]: Without dead ends: 4617 [2022-01-18 06:57:55,948 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 35 SyntacticMatches, 4 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 970 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=590, Invalid=2490, Unknown=0, NotChecked=0, Total=3080 [2022-01-18 06:57:55,948 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 372 mSDsluCounter, 645 mSDsCounter, 0 mSdLazyCounter, 859 mSolverCounterSat, 81 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 372 SdHoareTripleChecker+Valid, 365 SdHoareTripleChecker+Invalid, 1421 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 81 IncrementalHoareTripleChecker+Valid, 859 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 481 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 06:57:55,948 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [372 Valid, 365 Invalid, 1421 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [81 Valid, 859 Invalid, 0 Unknown, 481 Unchecked, 0.5s Time] [2022-01-18 06:57:55,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4617 states. [2022-01-18 06:57:55,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4617 to 2661. [2022-01-18 06:57:55,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2661 states, 2660 states have (on average 3.5981203007518796) internal successors, (9571), 2660 states have internal predecessors, (9571), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:57:55,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2661 states to 2661 states and 9571 transitions. [2022-01-18 06:57:55,993 INFO L78 Accepts]: Start accepts. Automaton has 2661 states and 9571 transitions. Word has length 26 [2022-01-18 06:57:55,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:57:55,993 INFO L470 AbstractCegarLoop]: Abstraction has 2661 states and 9571 transitions. [2022-01-18 06:57:55,993 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.5416666666666665) internal successors, (61), 24 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) [2022-01-18 06:57:55,993 INFO L276 IsEmpty]: Start isEmpty. Operand 2661 states and 9571 transitions. [2022-01-18 06:57:55,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 06:57:55,996 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:57:55,996 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:57:56,014 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Forceful destruction successful, exit code 0 [2022-01-18 06:57:56,212 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,SelfDestructingSolverStorable59 [2022-01-18 06:57:56,227 INFO L402 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 06:57:56,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:57:56,227 INFO L85 PathProgramCache]: Analyzing trace with hash -697050812, now seen corresponding path program 22 times [2022-01-18 06:57:56,227 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:57:56,227 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1212018610] [2022-01-18 06:57:56,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:57:56,227 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:57:56,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:57:56,390 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:57:56,390 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:57:56,390 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1212018610] [2022-01-18 06:57:56,390 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1212018610] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:57:56,390 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1799202495] [2022-01-18 06:57:56,390 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 06:57:56,391 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:57:56,391 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:57:56,391 INFO L229 MonitoredProcess]: Starting monitored process 59 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 06:57:56,394 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Waiting until timeout for monitored process [2022-01-18 06:57:56,415 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 06:57:56,415 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:57:56,415 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2022-01-18 06:57:56,416 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:57:56,701 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:57:56,706 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 06:57:56,706 INFO L387 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 109 treesize of output 91 [2022-01-18 06:57:57,233 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:57:57,233 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:57:57,700 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 06:57:57,700 INFO L387 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 175 treesize of output 161 [2022-01-18 06:58:11,814 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:58:11,814 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1799202495] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:58:11,814 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:58:11,815 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 24 [2022-01-18 06:58:11,815 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1914633451] [2022-01-18 06:58:11,815 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:58:11,815 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-18 06:58:11,815 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:58:11,815 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-18 06:58:11,815 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=447, Unknown=0, NotChecked=0, Total=552 [2022-01-18 06:58:11,815 INFO L87 Difference]: Start difference. First operand 2661 states and 9571 transitions. Second operand has 24 states, 24 states have (on average 2.5416666666666665) internal successors, (61), 24 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) [2022-01-18 06:58:16,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:58:16,647 INFO L93 Difference]: Finished difference Result 5349 states and 17670 transitions. [2022-01-18 06:58:16,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-01-18 06:58:16,647 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.5416666666666665) internal successors, (61), 24 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 26 [2022-01-18 06:58:16,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:58:16,656 INFO L225 Difference]: With dead ends: 5349 [2022-01-18 06:58:16,656 INFO L226 Difference]: Without dead ends: 5305 [2022-01-18 06:58:16,657 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 36 SyntacticMatches, 4 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1699 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=1040, Invalid=4072, Unknown=0, NotChecked=0, Total=5112 [2022-01-18 06:58:16,657 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 485 mSDsluCounter, 550 mSDsCounter, 0 mSdLazyCounter, 996 mSolverCounterSat, 120 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 485 SdHoareTripleChecker+Valid, 282 SdHoareTripleChecker+Invalid, 1388 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 120 IncrementalHoareTripleChecker+Valid, 996 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 272 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 06:58:16,657 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [485 Valid, 282 Invalid, 1388 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [120 Valid, 996 Invalid, 0 Unknown, 272 Unchecked, 0.6s Time] [2022-01-18 06:58:16,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5305 states. [2022-01-18 06:58:16,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5305 to 2662. [2022-01-18 06:58:16,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2662 states, 2661 states have (on average 3.603532506576475) internal successors, (9589), 2661 states have internal predecessors, (9589), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:58:16,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2662 states to 2662 states and 9589 transitions. [2022-01-18 06:58:16,705 INFO L78 Accepts]: Start accepts. Automaton has 2662 states and 9589 transitions. Word has length 26 [2022-01-18 06:58:16,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:58:16,705 INFO L470 AbstractCegarLoop]: Abstraction has 2662 states and 9589 transitions. [2022-01-18 06:58:16,705 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.5416666666666665) internal successors, (61), 24 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) [2022-01-18 06:58:16,705 INFO L276 IsEmpty]: Start isEmpty. Operand 2662 states and 9589 transitions. [2022-01-18 06:58:16,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 06:58:16,709 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:58:16,709 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:58:16,724 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Forceful destruction successful, exit code 0 [2022-01-18 06:58:16,921 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,SelfDestructingSolverStorable60 [2022-01-18 06:58:16,921 INFO L402 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 06:58:16,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:58:16,922 INFO L85 PathProgramCache]: Analyzing trace with hash 1907973580, now seen corresponding path program 23 times [2022-01-18 06:58:16,922 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:58:16,922 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2063431632] [2022-01-18 06:58:16,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:58:16,922 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:58:16,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:58:17,277 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:58:17,277 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:58:17,277 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2063431632] [2022-01-18 06:58:17,277 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2063431632] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:58:17,277 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1301909975] [2022-01-18 06:58:17,277 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 06:58:17,277 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:58:17,277 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:58:17,278 INFO L229 MonitoredProcess]: Starting monitored process 60 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 06:58:17,279 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Waiting until timeout for monitored process [2022-01-18 06:58:17,305 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 06:58:17,306 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:58:17,306 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 23 conjunts are in the unsatisfiable core [2022-01-18 06:58:17,306 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:58:17,579 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:58:17,585 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 06:58:17,585 INFO L387 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 109 treesize of output 91 [2022-01-18 06:58:18,275 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:58:18,275 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:58:18,708 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 06:58:18,708 INFO L387 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 183 treesize of output 173 [2022-01-18 06:58:21,049 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:58:21,050 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1301909975] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:58:21,050 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:58:21,050 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 26 [2022-01-18 06:58:21,050 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [562077603] [2022-01-18 06:58:21,050 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:58:21,051 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-18 06:58:21,051 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:58:21,051 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-18 06:58:21,051 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=542, Unknown=0, NotChecked=0, Total=650 [2022-01-18 06:58:21,051 INFO L87 Difference]: Start difference. First operand 2662 states and 9589 transitions. Second operand has 26 states, 26 states have (on average 2.3846153846153846) internal successors, (62), 26 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:58:32,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:58:32,059 INFO L93 Difference]: Finished difference Result 5266 states and 17539 transitions. [2022-01-18 06:58:32,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2022-01-18 06:58:32,059 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.3846153846153846) internal successors, (62), 26 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 26 [2022-01-18 06:58:32,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:58:32,068 INFO L225 Difference]: With dead ends: 5266 [2022-01-18 06:58:32,068 INFO L226 Difference]: Without dead ends: 5184 [2022-01-18 06:58:32,069 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 35 SyntacticMatches, 2 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3920 ImplicationChecksByTransitivity, 10.7s TimeCoverageRelationStatistics Valid=1742, Invalid=9178, Unknown=0, NotChecked=0, Total=10920 [2022-01-18 06:58:32,069 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 498 mSDsluCounter, 580 mSDsCounter, 0 mSdLazyCounter, 1218 mSolverCounterSat, 135 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 498 SdHoareTripleChecker+Valid, 323 SdHoareTripleChecker+Invalid, 1423 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 135 IncrementalHoareTripleChecker+Valid, 1218 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 70 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-18 06:58:32,069 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [498 Valid, 323 Invalid, 1423 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [135 Valid, 1218 Invalid, 0 Unknown, 70 Unchecked, 0.8s Time] [2022-01-18 06:58:32,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5184 states. [2022-01-18 06:58:32,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5184 to 2764. [2022-01-18 06:58:32,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2764 states, 2763 states have (on average 3.6112920738327903) internal successors, (9978), 2763 states have internal predecessors, (9978), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:58:32,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2764 states to 2764 states and 9978 transitions. [2022-01-18 06:58:32,145 INFO L78 Accepts]: Start accepts. Automaton has 2764 states and 9978 transitions. Word has length 26 [2022-01-18 06:58:32,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:58:32,145 INFO L470 AbstractCegarLoop]: Abstraction has 2764 states and 9978 transitions. [2022-01-18 06:58:32,145 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.3846153846153846) internal successors, (62), 26 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:58:32,145 INFO L276 IsEmpty]: Start isEmpty. Operand 2764 states and 9978 transitions. [2022-01-18 06:58:32,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 06:58:32,149 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:58:32,149 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:58:32,165 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Forceful destruction successful, exit code 0 [2022-01-18 06:58:32,357 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,SelfDestructingSolverStorable61 [2022-01-18 06:58:32,358 INFO L402 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 06:58:32,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:58:32,358 INFO L85 PathProgramCache]: Analyzing trace with hash -879958864, now seen corresponding path program 24 times [2022-01-18 06:58:32,358 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:58:32,358 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1778133446] [2022-01-18 06:58:32,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:58:32,359 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:58:32,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:58:32,599 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:58:32,600 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:58:32,600 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1778133446] [2022-01-18 06:58:32,600 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1778133446] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:58:32,600 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [103654235] [2022-01-18 06:58:32,600 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 06:58:32,600 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:58:32,600 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:58:32,601 INFO L229 MonitoredProcess]: Starting monitored process 61 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 06:58:32,602 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Waiting until timeout for monitored process [2022-01-18 06:58:32,630 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-01-18 06:58:32,630 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:58:32,631 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2022-01-18 06:58:32,631 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:58:32,992 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:58:32,997 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 06:58:32,997 INFO L387 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 109 treesize of output 83 [2022-01-18 06:58:33,354 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:58:33,354 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:58:33,827 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:58:33,840 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 06:58:33,840 INFO L387 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 195 treesize of output 157 [2022-01-18 06:58:35,320 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:58:35,320 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [103654235] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:58:35,320 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:58:35,320 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 11] total 27 [2022-01-18 06:58:35,320 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1975132777] [2022-01-18 06:58:35,320 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:58:35,321 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-01-18 06:58:35,321 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:58:35,321 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-01-18 06:58:35,321 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=601, Unknown=0, NotChecked=0, Total=702 [2022-01-18 06:58:35,321 INFO L87 Difference]: Start difference. First operand 2764 states and 9978 transitions. Second operand has 27 states, 27 states have (on average 2.4444444444444446) internal successors, (66), 27 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) [2022-01-18 06:58:39,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:58:39,878 INFO L93 Difference]: Finished difference Result 5463 states and 18164 transitions. [2022-01-18 06:58:39,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-01-18 06:58:39,878 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.4444444444444446) internal successors, (66), 27 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 26 [2022-01-18 06:58:39,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:58:39,886 INFO L225 Difference]: With dead ends: 5463 [2022-01-18 06:58:39,886 INFO L226 Difference]: Without dead ends: 5383 [2022-01-18 06:58:39,887 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 35 SyntacticMatches, 6 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1677 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=920, Invalid=4482, Unknown=0, NotChecked=0, Total=5402 [2022-01-18 06:58:39,887 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 392 mSDsluCounter, 848 mSDsCounter, 0 mSdLazyCounter, 1321 mSolverCounterSat, 98 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 392 SdHoareTripleChecker+Valid, 524 SdHoareTripleChecker+Invalid, 1923 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 98 IncrementalHoareTripleChecker+Valid, 1321 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 504 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-18 06:58:39,888 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [392 Valid, 524 Invalid, 1923 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [98 Valid, 1321 Invalid, 0 Unknown, 504 Unchecked, 0.7s Time] [2022-01-18 06:58:39,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5383 states. [2022-01-18 06:58:39,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5383 to 2773. [2022-01-18 06:58:39,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2773 states, 2772 states have (on average 3.6154401154401152) internal successors, (10022), 2772 states have internal predecessors, (10022), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:58:39,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2773 states to 2773 states and 10022 transitions. [2022-01-18 06:58:39,936 INFO L78 Accepts]: Start accepts. Automaton has 2773 states and 10022 transitions. Word has length 26 [2022-01-18 06:58:39,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:58:39,936 INFO L470 AbstractCegarLoop]: Abstraction has 2773 states and 10022 transitions. [2022-01-18 06:58:39,936 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.4444444444444446) internal successors, (66), 27 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) [2022-01-18 06:58:39,936 INFO L276 IsEmpty]: Start isEmpty. Operand 2773 states and 10022 transitions. [2022-01-18 06:58:39,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 06:58:39,939 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:58:39,940 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:58:39,958 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Forceful destruction successful, exit code 0 [2022-01-18 06:58:40,155 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,61 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:58:40,156 INFO L402 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 06:58:40,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:58:40,157 INFO L85 PathProgramCache]: Analyzing trace with hash 1822017344, now seen corresponding path program 25 times [2022-01-18 06:58:40,157 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:58:40,157 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [828292781] [2022-01-18 06:58:40,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:58:40,157 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:58:40,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:58:40,389 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:58:40,389 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:58:40,389 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [828292781] [2022-01-18 06:58:40,389 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [828292781] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:58:40,389 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [107736620] [2022-01-18 06:58:40,389 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 06:58:40,390 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:58:40,390 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:58:40,396 INFO L229 MonitoredProcess]: Starting monitored process 62 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 06:58:40,397 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Waiting until timeout for monitored process [2022-01-18 06:58:40,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:58:40,423 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-18 06:58:40,424 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:58:40,720 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:58:40,720 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:58:40,723 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 06:58:40,723 INFO L387 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 143 treesize of output 99 [2022-01-18 06:58:40,979 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:58:40,979 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:58:41,398 INFO L353 Elim1Store]: treesize reduction 10, result has 81.8 percent of original size [2022-01-18 06:58:41,399 INFO L387 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 195 treesize of output 157 [2022-01-18 06:58:42,477 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:58:42,477 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [107736620] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:58:42,477 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:58:42,477 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 26 [2022-01-18 06:58:42,477 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [676682078] [2022-01-18 06:58:42,477 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:58:42,478 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-18 06:58:42,478 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:58:42,478 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-18 06:58:42,478 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=548, Unknown=0, NotChecked=0, Total=650 [2022-01-18 06:58:42,478 INFO L87 Difference]: Start difference. First operand 2773 states and 10022 transitions. Second operand has 26 states, 26 states have (on average 2.6153846153846154) internal successors, (68), 26 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:58:45,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:58:45,763 INFO L93 Difference]: Finished difference Result 5391 states and 17957 transitions. [2022-01-18 06:58:45,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2022-01-18 06:58:45,763 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.6153846153846154) internal successors, (68), 26 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-01-18 06:58:45,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:58:45,774 INFO L225 Difference]: With dead ends: 5391 [2022-01-18 06:58:45,774 INFO L226 Difference]: Without dead ends: 5320 [2022-01-18 06:58:45,775 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1833 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=890, Invalid=5116, Unknown=0, NotChecked=0, Total=6006 [2022-01-18 06:58:45,778 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 400 mSDsluCounter, 654 mSDsCounter, 0 mSdLazyCounter, 1739 mSolverCounterSat, 80 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 400 SdHoareTripleChecker+Valid, 353 SdHoareTripleChecker+Invalid, 1819 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 80 IncrementalHoareTripleChecker+Valid, 1739 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-18 06:58:45,779 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [400 Valid, 353 Invalid, 1819 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [80 Valid, 1739 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-18 06:58:45,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5320 states. [2022-01-18 06:58:45,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5320 to 2765. [2022-01-18 06:58:45,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2765 states, 2764 states have (on average 3.6150506512301015) internal successors, (9992), 2764 states have internal predecessors, (9992), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:58:45,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2765 states to 2765 states and 9992 transitions. [2022-01-18 06:58:45,876 INFO L78 Accepts]: Start accepts. Automaton has 2765 states and 9992 transitions. Word has length 26 [2022-01-18 06:58:45,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:58:45,877 INFO L470 AbstractCegarLoop]: Abstraction has 2765 states and 9992 transitions. [2022-01-18 06:58:45,877 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.6153846153846154) internal successors, (68), 26 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:58:45,877 INFO L276 IsEmpty]: Start isEmpty. Operand 2765 states and 9992 transitions. [2022-01-18 06:58:45,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 06:58:45,881 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:58:45,882 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:58:45,897 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Forceful destruction successful, exit code 0 [2022-01-18 06:58:46,083 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,62 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:58:46,083 INFO L402 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 06:58:46,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:58:46,084 INFO L85 PathProgramCache]: Analyzing trace with hash 1440358446, now seen corresponding path program 26 times [2022-01-18 06:58:46,084 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:58:46,084 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2075425166] [2022-01-18 06:58:46,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:58:46,084 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:58:46,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:58:46,404 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:58:46,404 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:58:46,404 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2075425166] [2022-01-18 06:58:46,404 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2075425166] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:58:46,404 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1060662450] [2022-01-18 06:58:46,404 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 06:58:46,404 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:58:46,404 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:58:46,406 INFO L229 MonitoredProcess]: Starting monitored process 63 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 06:58:46,406 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Waiting until timeout for monitored process [2022-01-18 06:58:46,430 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 06:58:46,430 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:58:46,430 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2022-01-18 06:58:46,431 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:58:46,748 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:58:46,752 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 06:58:46,752 INFO L387 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 109 treesize of output 83 [2022-01-18 06:58:47,092 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:58:47,093 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:58:47,646 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:58:47,662 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 06:58:47,663 INFO L387 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 199 treesize of output 165 [2022-01-18 06:58:48,864 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:58:48,864 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1060662450] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:58:48,864 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:58:48,864 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 24 [2022-01-18 06:58:48,864 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1725550313] [2022-01-18 06:58:48,864 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:58:48,864 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-18 06:58:48,864 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:58:48,864 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-18 06:58:48,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=451, Unknown=0, NotChecked=0, Total=552 [2022-01-18 06:58:48,865 INFO L87 Difference]: Start difference. First operand 2765 states and 9992 transitions. Second operand has 24 states, 24 states have (on average 2.5833333333333335) internal successors, (62), 24 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:58:53,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:58:53,037 INFO L93 Difference]: Finished difference Result 5206 states and 17425 transitions. [2022-01-18 06:58:53,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-01-18 06:58:53,038 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.5833333333333335) internal successors, (62), 24 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 26 [2022-01-18 06:58:53,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:58:53,046 INFO L225 Difference]: With dead ends: 5206 [2022-01-18 06:58:53,046 INFO L226 Difference]: Without dead ends: 5191 [2022-01-18 06:58:53,047 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 34 SyntacticMatches, 5 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1435 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=888, Invalid=3534, Unknown=0, NotChecked=0, Total=4422 [2022-01-18 06:58:53,047 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 429 mSDsluCounter, 551 mSDsCounter, 0 mSdLazyCounter, 1027 mSolverCounterSat, 102 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 429 SdHoareTripleChecker+Valid, 325 SdHoareTripleChecker+Invalid, 1318 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 102 IncrementalHoareTripleChecker+Valid, 1027 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 189 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 06:58:53,047 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [429 Valid, 325 Invalid, 1318 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [102 Valid, 1027 Invalid, 0 Unknown, 189 Unchecked, 0.6s Time] [2022-01-18 06:58:53,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5191 states. [2022-01-18 06:58:53,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5191 to 2767. [2022-01-18 06:58:53,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2767 states, 2766 states have (on average 3.615690527838033) internal successors, (10001), 2766 states have internal predecessors, (10001), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:58:53,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2767 states to 2767 states and 10001 transitions. [2022-01-18 06:58:53,099 INFO L78 Accepts]: Start accepts. Automaton has 2767 states and 10001 transitions. Word has length 26 [2022-01-18 06:58:53,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:58:53,100 INFO L470 AbstractCegarLoop]: Abstraction has 2767 states and 10001 transitions. [2022-01-18 06:58:53,100 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.5833333333333335) internal successors, (62), 24 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:58:53,100 INFO L276 IsEmpty]: Start isEmpty. Operand 2767 states and 10001 transitions. [2022-01-18 06:58:53,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 06:58:53,103 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:58:53,103 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:58:53,121 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Forceful destruction successful, exit code 0 [2022-01-18 06:58:53,309 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,SelfDestructingSolverStorable64 [2022-01-18 06:58:53,309 INFO L402 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 06:58:53,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:58:53,319 INFO L85 PathProgramCache]: Analyzing trace with hash -2130990306, now seen corresponding path program 37 times [2022-01-18 06:58:53,319 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:58:53,319 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1105724072] [2022-01-18 06:58:53,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:58:53,319 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:58:53,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:58:53,679 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:58:53,679 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:58:53,679 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1105724072] [2022-01-18 06:58:53,679 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1105724072] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:58:53,679 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [767209761] [2022-01-18 06:58:53,679 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 06:58:53,679 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:58:53,679 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:58:53,680 INFO L229 MonitoredProcess]: Starting monitored process 64 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 06:58:53,681 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Waiting until timeout for monitored process [2022-01-18 06:58:53,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:58:53,709 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2022-01-18 06:58:53,709 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:58:54,263 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:58:54,263 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:58:54,264 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:58:54,264 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:58:54,265 INFO L387 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 115 treesize of output 75 [2022-01-18 06:58:54,362 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:58:54,362 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:58:54,859 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 06:58:54,860 INFO L387 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 211 treesize of output 149 [2022-01-18 06:58:55,317 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:58:55,318 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [767209761] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:58:55,318 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:58:55,318 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 9] total 24 [2022-01-18 06:58:55,318 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [897097388] [2022-01-18 06:58:55,318 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:58:55,318 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-18 06:58:55,318 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:58:55,318 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-18 06:58:55,318 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=512, Unknown=0, NotChecked=0, Total=600 [2022-01-18 06:58:55,318 INFO L87 Difference]: Start difference. First operand 2767 states and 10001 transitions. Second operand has 25 states, 25 states have (on average 2.76) internal successors, (69), 24 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) [2022-01-18 06:58:57,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:58:57,742 INFO L93 Difference]: Finished difference Result 4498 states and 15361 transitions. [2022-01-18 06:58:57,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-01-18 06:58:57,742 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.76) internal successors, (69), 24 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 26 [2022-01-18 06:58:57,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:58:57,750 INFO L225 Difference]: With dead ends: 4498 [2022-01-18 06:58:57,750 INFO L226 Difference]: Without dead ends: 4468 [2022-01-18 06:58:57,750 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1202 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=618, Invalid=3542, Unknown=0, NotChecked=0, Total=4160 [2022-01-18 06:58:57,751 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 282 mSDsluCounter, 533 mSDsCounter, 0 mSdLazyCounter, 1077 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 282 SdHoareTripleChecker+Valid, 258 SdHoareTripleChecker+Invalid, 1144 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 1077 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 06:58:57,751 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [282 Valid, 258 Invalid, 1144 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 1077 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-18 06:58:57,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4468 states. [2022-01-18 06:58:57,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4468 to 2793. [2022-01-18 06:58:57,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2793 states, 2792 states have (on average 3.611031518624642) internal successors, (10082), 2792 states have internal predecessors, (10082), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:58:57,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2793 states to 2793 states and 10082 transitions. [2022-01-18 06:58:57,796 INFO L78 Accepts]: Start accepts. Automaton has 2793 states and 10082 transitions. Word has length 26 [2022-01-18 06:58:57,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:58:57,796 INFO L470 AbstractCegarLoop]: Abstraction has 2793 states and 10082 transitions. [2022-01-18 06:58:57,796 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.76) internal successors, (69), 24 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) [2022-01-18 06:58:57,796 INFO L276 IsEmpty]: Start isEmpty. Operand 2793 states and 10082 transitions. [2022-01-18 06:58:57,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 06:58:57,800 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:58:57,800 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:58:57,817 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Forceful destruction successful, exit code 0 [2022-01-18 06:58:58,015 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 64 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable65 [2022-01-18 06:58:58,015 INFO L402 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 06:58:58,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:58:58,015 INFO L85 PathProgramCache]: Analyzing trace with hash -1013224948, now seen corresponding path program 38 times [2022-01-18 06:58:58,015 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:58:58,015 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [313983175] [2022-01-18 06:58:58,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:58:58,016 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:58:58,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:58:58,331 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:58:58,331 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:58:58,331 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [313983175] [2022-01-18 06:58:58,331 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [313983175] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:58:58,331 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1577598228] [2022-01-18 06:58:58,331 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 06:58:58,331 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:58:58,331 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:58:58,348 INFO L229 MonitoredProcess]: Starting monitored process 65 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 06:58:58,364 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Waiting until timeout for monitored process [2022-01-18 06:58:58,376 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 06:58:58,376 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:58:58,377 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 29 conjunts are in the unsatisfiable core [2022-01-18 06:58:58,378 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:58:58,848 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:58:58,849 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:58:58,860 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 06:58:58,860 INFO L387 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 115 treesize of output 101 [2022-01-18 06:58:59,373 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:58:59,374 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:59:00,056 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:59:00,057 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:59:00,057 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:59:00,069 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 06:59:00,069 INFO L387 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 215 treesize of output 143 [2022-01-18 06:59:00,318 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:59:00,319 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1577598228] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:59:00,319 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:59:00,319 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 27 [2022-01-18 06:59:00,319 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [129209543] [2022-01-18 06:59:00,319 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:59:00,319 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-01-18 06:59:00,319 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:59:00,319 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-01-18 06:59:00,319 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=579, Unknown=0, NotChecked=0, Total=702 [2022-01-18 06:59:00,319 INFO L87 Difference]: Start difference. First operand 2793 states and 10082 transitions. Second operand has 27 states, 27 states have (on average 2.3703703703703702) internal successors, (64), 27 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:59:05,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:59:05,313 INFO L93 Difference]: Finished difference Result 4621 states and 15671 transitions. [2022-01-18 06:59:05,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-01-18 06:59:05,314 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.3703703703703702) internal successors, (64), 27 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-01-18 06:59:05,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:59:05,321 INFO L225 Difference]: With dead ends: 4621 [2022-01-18 06:59:05,321 INFO L226 Difference]: Without dead ends: 4491 [2022-01-18 06:59:05,321 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 34 SyntacticMatches, 2 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1794 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=950, Invalid=4600, Unknown=0, NotChecked=0, Total=5550 [2022-01-18 06:59:05,322 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 346 mSDsluCounter, 572 mSDsCounter, 0 mSdLazyCounter, 1130 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 346 SdHoareTripleChecker+Valid, 294 SdHoareTripleChecker+Invalid, 1187 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 1130 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-18 06:59:05,323 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [346 Valid, 294 Invalid, 1187 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 1130 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-18 06:59:05,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4491 states. [2022-01-18 06:59:05,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4491 to 2847. [2022-01-18 06:59:05,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2847 states, 2846 states have (on average 3.5934645115952213) internal successors, (10227), 2846 states have internal predecessors, (10227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:59:05,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2847 states to 2847 states and 10227 transitions. [2022-01-18 06:59:05,369 INFO L78 Accepts]: Start accepts. Automaton has 2847 states and 10227 transitions. Word has length 26 [2022-01-18 06:59:05,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:59:05,369 INFO L470 AbstractCegarLoop]: Abstraction has 2847 states and 10227 transitions. [2022-01-18 06:59:05,369 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.3703703703703702) internal successors, (64), 27 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:59:05,369 INFO L276 IsEmpty]: Start isEmpty. Operand 2847 states and 10227 transitions. [2022-01-18 06:59:05,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 06:59:05,387 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:59:05,387 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:59:05,419 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Forceful destruction successful, exit code 0 [2022-01-18 06:59:05,587 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66,65 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:59:05,588 INFO L402 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 06:59:05,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:59:05,588 INFO L85 PathProgramCache]: Analyzing trace with hash 54649616, now seen corresponding path program 39 times [2022-01-18 06:59:05,588 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:59:05,588 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [633552822] [2022-01-18 06:59:05,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:59:05,588 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:59:05,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:59:05,783 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:59:05,783 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:59:05,783 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [633552822] [2022-01-18 06:59:05,783 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [633552822] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:59:05,783 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1062352272] [2022-01-18 06:59:05,783 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 06:59:05,783 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:59:05,783 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:59:05,789 INFO L229 MonitoredProcess]: Starting monitored process 66 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 06:59:05,790 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Waiting until timeout for monitored process [2022-01-18 06:59:05,811 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-01-18 06:59:05,811 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:59:05,812 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-18 06:59:05,812 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:59:06,158 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:59:06,170 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 06:59:06,170 INFO L387 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 119 treesize of output 111 [2022-01-18 06:59:07,298 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:59:07,299 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:59:08,506 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:59:08,507 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:59:08,507 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:59:08,508 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:59:08,510 INFO L387 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 167 treesize of output 93 [2022-01-18 06:59:08,538 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:59:08,539 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1062352272] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:59:08,539 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:59:08,539 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 27 [2022-01-18 06:59:08,539 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1195090423] [2022-01-18 06:59:08,539 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:59:08,539 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-01-18 06:59:08,539 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:59:08,539 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-01-18 06:59:08,539 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=598, Unknown=0, NotChecked=0, Total=702 [2022-01-18 06:59:08,539 INFO L87 Difference]: Start difference. First operand 2847 states and 10227 transitions. Second operand has 27 states, 27 states have (on average 2.4814814814814814) internal successors, (67), 27 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) [2022-01-18 06:59:12,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:59:12,826 INFO L93 Difference]: Finished difference Result 5397 states and 18244 transitions. [2022-01-18 06:59:12,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2022-01-18 06:59:12,826 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.4814814814814814) internal successors, (67), 27 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 26 [2022-01-18 06:59:12,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:59:12,835 INFO L225 Difference]: With dead ends: 5397 [2022-01-18 06:59:12,835 INFO L226 Difference]: Without dead ends: 5346 [2022-01-18 06:59:12,835 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 35 SyntacticMatches, 4 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2424 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=1213, Invalid=6443, Unknown=0, NotChecked=0, Total=7656 [2022-01-18 06:59:12,836 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 448 mSDsluCounter, 801 mSDsCounter, 0 mSdLazyCounter, 1437 mSolverCounterSat, 99 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 448 SdHoareTripleChecker+Valid, 483 SdHoareTripleChecker+Invalid, 2438 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 99 IncrementalHoareTripleChecker+Valid, 1437 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 902 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-18 06:59:12,836 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [448 Valid, 483 Invalid, 2438 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [99 Valid, 1437 Invalid, 0 Unknown, 902 Unchecked, 0.7s Time] [2022-01-18 06:59:12,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5346 states. [2022-01-18 06:59:12,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5346 to 2934. [2022-01-18 06:59:12,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2934 states, 2933 states have (on average 3.5819979543129903) internal successors, (10506), 2933 states have internal predecessors, (10506), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:59:12,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2934 states to 2934 states and 10506 transitions. [2022-01-18 06:59:12,889 INFO L78 Accepts]: Start accepts. Automaton has 2934 states and 10506 transitions. Word has length 26 [2022-01-18 06:59:12,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:59:12,889 INFO L470 AbstractCegarLoop]: Abstraction has 2934 states and 10506 transitions. [2022-01-18 06:59:12,889 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.4814814814814814) internal successors, (67), 27 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) [2022-01-18 06:59:12,889 INFO L276 IsEmpty]: Start isEmpty. Operand 2934 states and 10506 transitions. [2022-01-18 06:59:12,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 06:59:12,893 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:59:12,893 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:59:12,910 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Forceful destruction successful, exit code 0 [2022-01-18 06:59:13,103 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,SelfDestructingSolverStorable67 [2022-01-18 06:59:13,104 INFO L402 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 06:59:13,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:59:13,104 INFO L85 PathProgramCache]: Analyzing trace with hash 1528867272, now seen corresponding path program 40 times [2022-01-18 06:59:13,104 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:59:13,104 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2026750296] [2022-01-18 06:59:13,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:59:13,104 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:59:13,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:59:13,338 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:59:13,338 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:59:13,338 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2026750296] [2022-01-18 06:59:13,338 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2026750296] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:59:13,338 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [185839088] [2022-01-18 06:59:13,338 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 06:59:13,338 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:59:13,339 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:59:13,348 INFO L229 MonitoredProcess]: Starting monitored process 67 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 06:59:13,349 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Waiting until timeout for monitored process [2022-01-18 06:59:13,370 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 06:59:13,370 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:59:13,371 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-18 06:59:13,371 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:59:13,895 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:59:13,896 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:59:13,896 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:59:13,897 INFO L387 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 119 treesize of output 75 [2022-01-18 06:59:14,008 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:59:14,008 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:59:14,549 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 06:59:14,549 INFO L387 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 215 treesize of output 153 [2022-01-18 06:59:15,169 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:59:15,170 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [185839088] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:59:15,170 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:59:15,170 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 9] total 22 [2022-01-18 06:59:15,170 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [846340504] [2022-01-18 06:59:15,170 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:59:15,170 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-18 06:59:15,170 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:59:15,170 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-18 06:59:15,170 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=431, Unknown=0, NotChecked=0, Total=506 [2022-01-18 06:59:15,170 INFO L87 Difference]: Start difference. First operand 2934 states and 10506 transitions. Second operand has 23 states, 23 states have (on average 2.739130434782609) internal successors, (63), 22 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) [2022-01-18 06:59:18,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:59:18,617 INFO L93 Difference]: Finished difference Result 4801 states and 16262 transitions. [2022-01-18 06:59:18,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2022-01-18 06:59:18,617 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.739130434782609) internal successors, (63), 22 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 26 [2022-01-18 06:59:18,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:59:18,624 INFO L225 Difference]: With dead ends: 4801 [2022-01-18 06:59:18,624 INFO L226 Difference]: Without dead ends: 4771 [2022-01-18 06:59:18,625 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 37 SyntacticMatches, 3 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1818 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=819, Invalid=4881, Unknown=0, NotChecked=0, Total=5700 [2022-01-18 06:59:18,625 INFO L933 BasicCegarLoop]: 45 mSDtfsCounter, 273 mSDsluCounter, 870 mSDsCounter, 0 mSdLazyCounter, 1687 mSolverCounterSat, 83 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 273 SdHoareTripleChecker+Valid, 444 SdHoareTripleChecker+Invalid, 1835 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 83 IncrementalHoareTripleChecker+Valid, 1687 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 65 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-18 06:59:18,625 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [273 Valid, 444 Invalid, 1835 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [83 Valid, 1687 Invalid, 0 Unknown, 65 Unchecked, 0.8s Time] [2022-01-18 06:59:18,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4771 states. [2022-01-18 06:59:18,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4771 to 2983. [2022-01-18 06:59:18,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2983 states, 2982 states have (on average 3.5710932260228034) internal successors, (10649), 2982 states have internal predecessors, (10649), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:59:18,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2983 states to 2983 states and 10649 transitions. [2022-01-18 06:59:18,707 INFO L78 Accepts]: Start accepts. Automaton has 2983 states and 10649 transitions. Word has length 26 [2022-01-18 06:59:18,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:59:18,707 INFO L470 AbstractCegarLoop]: Abstraction has 2983 states and 10649 transitions. [2022-01-18 06:59:18,708 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.739130434782609) internal successors, (63), 22 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) [2022-01-18 06:59:18,708 INFO L276 IsEmpty]: Start isEmpty. Operand 2983 states and 10649 transitions. [2022-01-18 06:59:18,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 06:59:18,711 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:59:18,711 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:59:18,727 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Forceful destruction successful, exit code 0 [2022-01-18 06:59:18,924 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2022-01-18 06:59:18,924 INFO L402 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 06:59:18,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:59:18,925 INFO L85 PathProgramCache]: Analyzing trace with hash -533725808, now seen corresponding path program 27 times [2022-01-18 06:59:18,925 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:59:18,925 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1437640897] [2022-01-18 06:59:18,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:59:18,925 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:59:18,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:59:19,285 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:59:19,285 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:59:19,285 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1437640897] [2022-01-18 06:59:19,285 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1437640897] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:59:19,285 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1210146232] [2022-01-18 06:59:19,285 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 06:59:19,285 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:59:19,285 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:59:19,286 INFO L229 MonitoredProcess]: Starting monitored process 68 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 06:59:19,287 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Waiting until timeout for monitored process [2022-01-18 06:59:19,308 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 06:59:19,308 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:59:19,309 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2022-01-18 06:59:19,309 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:59:20,412 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:59:20,413 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:59:20,413 INFO L387 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 109 treesize of output 75 [2022-01-18 06:59:20,544 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:59:20,545 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:59:20,999 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 06:59:20,999 INFO L387 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 183 treesize of output 169 [2022-01-18 06:59:27,309 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:59:27,309 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1210146232] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:59:27,309 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:59:27,309 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-01-18 06:59:27,309 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1341282342] [2022-01-18 06:59:27,310 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:59:27,310 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-18 06:59:27,310 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:59:27,310 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-18 06:59:27,310 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=468, Unknown=0, NotChecked=0, Total=600 [2022-01-18 06:59:27,310 INFO L87 Difference]: Start difference. First operand 2983 states and 10649 transitions. Second operand has 25 states, 25 states have (on average 2.56) internal successors, (64), 25 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:59:30,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:59:30,729 INFO L93 Difference]: Finished difference Result 6027 states and 19657 transitions. [2022-01-18 06:59:30,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-01-18 06:59:30,730 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.56) internal successors, (64), 25 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-01-18 06:59:30,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:59:30,745 INFO L225 Difference]: With dead ends: 6027 [2022-01-18 06:59:30,745 INFO L226 Difference]: Without dead ends: 5997 [2022-01-18 06:59:30,745 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 39 SyntacticMatches, 4 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1647 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=1044, Invalid=3512, Unknown=0, NotChecked=0, Total=4556 [2022-01-18 06:59:30,746 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 506 mSDsluCounter, 462 mSDsCounter, 0 mSdLazyCounter, 808 mSolverCounterSat, 86 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 506 SdHoareTripleChecker+Valid, 261 SdHoareTripleChecker+Invalid, 1179 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 86 IncrementalHoareTripleChecker+Valid, 808 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 285 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 06:59:30,746 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [506 Valid, 261 Invalid, 1179 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [86 Valid, 808 Invalid, 0 Unknown, 285 Unchecked, 0.5s Time] [2022-01-18 06:59:30,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5997 states. [2022-01-18 06:59:30,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5997 to 3026. [2022-01-18 06:59:30,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3026 states, 3025 states have (on average 3.5798347107438016) internal successors, (10829), 3025 states have internal predecessors, (10829), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:59:30,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3026 states to 3026 states and 10829 transitions. [2022-01-18 06:59:30,866 INFO L78 Accepts]: Start accepts. Automaton has 3026 states and 10829 transitions. Word has length 26 [2022-01-18 06:59:30,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:59:30,866 INFO L470 AbstractCegarLoop]: Abstraction has 3026 states and 10829 transitions. [2022-01-18 06:59:30,866 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.56) internal successors, (64), 25 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:59:30,866 INFO L276 IsEmpty]: Start isEmpty. Operand 3026 states and 10829 transitions. [2022-01-18 06:59:30,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 06:59:30,872 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:59:30,872 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:59:30,894 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Forceful destruction successful, exit code 0 [2022-01-18 06:59:31,072 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,SelfDestructingSolverStorable69 [2022-01-18 06:59:31,073 INFO L402 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 06:59:31,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:59:31,073 INFO L85 PathProgramCache]: Analyzing trace with hash 1056144568, now seen corresponding path program 28 times [2022-01-18 06:59:31,073 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:59:31,073 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1418893957] [2022-01-18 06:59:31,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:59:31,073 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:59:31,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:59:31,452 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:59:31,452 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:59:31,452 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1418893957] [2022-01-18 06:59:31,452 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1418893957] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:59:31,452 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [291546150] [2022-01-18 06:59:31,452 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 06:59:31,453 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:59:31,453 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:59:31,453 INFO L229 MonitoredProcess]: Starting monitored process 69 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 06:59:31,454 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Waiting until timeout for monitored process [2022-01-18 06:59:31,478 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 06:59:31,478 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:59:31,479 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2022-01-18 06:59:31,479 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:59:32,070 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:59:32,070 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:59:32,071 INFO L387 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 109 treesize of output 75 [2022-01-18 06:59:32,193 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:59:32,193 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:59:32,627 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:59:32,644 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 06:59:32,644 INFO L387 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 203 treesize of output 169 [2022-01-18 06:59:34,042 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:59:34,043 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [291546150] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:59:34,043 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:59:34,043 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 24 [2022-01-18 06:59:34,043 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [431593479] [2022-01-18 06:59:34,043 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:59:34,043 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-18 06:59:34,043 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:59:34,043 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-18 06:59:34,043 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=434, Unknown=0, NotChecked=0, Total=552 [2022-01-18 06:59:34,043 INFO L87 Difference]: Start difference. First operand 3026 states and 10829 transitions. Second operand has 24 states, 24 states have (on average 2.5416666666666665) internal successors, (61), 24 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) [2022-01-18 06:59:38,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:59:38,457 INFO L93 Difference]: Finished difference Result 6258 states and 20368 transitions. [2022-01-18 06:59:38,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-01-18 06:59:38,457 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.5416666666666665) internal successors, (61), 24 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 26 [2022-01-18 06:59:38,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:59:38,467 INFO L225 Difference]: With dead ends: 6258 [2022-01-18 06:59:38,467 INFO L226 Difference]: Without dead ends: 6228 [2022-01-18 06:59:38,468 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 34 SyntacticMatches, 5 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1563 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=1051, Invalid=3505, Unknown=0, NotChecked=0, Total=4556 [2022-01-18 06:59:38,468 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 456 mSDsluCounter, 642 mSDsCounter, 0 mSdLazyCounter, 1312 mSolverCounterSat, 88 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 456 SdHoareTripleChecker+Valid, 430 SdHoareTripleChecker+Invalid, 1648 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 88 IncrementalHoareTripleChecker+Valid, 1312 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 248 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-18 06:59:38,468 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [456 Valid, 430 Invalid, 1648 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [88 Valid, 1312 Invalid, 0 Unknown, 248 Unchecked, 0.8s Time] [2022-01-18 06:59:38,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6228 states. [2022-01-18 06:59:38,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6228 to 3086. [2022-01-18 06:59:38,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3086 states, 3085 states have (on average 3.581847649918963) internal successors, (11050), 3085 states have internal predecessors, (11050), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:59:38,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3086 states to 3086 states and 11050 transitions. [2022-01-18 06:59:38,526 INFO L78 Accepts]: Start accepts. Automaton has 3086 states and 11050 transitions. Word has length 26 [2022-01-18 06:59:38,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:59:38,526 INFO L470 AbstractCegarLoop]: Abstraction has 3086 states and 11050 transitions. [2022-01-18 06:59:38,526 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.5416666666666665) internal successors, (61), 24 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) [2022-01-18 06:59:38,526 INFO L276 IsEmpty]: Start isEmpty. Operand 3086 states and 11050 transitions. [2022-01-18 06:59:38,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 06:59:38,530 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:59:38,530 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:59:38,546 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Forceful destruction successful, exit code 0 [2022-01-18 06:59:38,745 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,SelfDestructingSolverStorable70 [2022-01-18 06:59:38,746 INFO L402 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 06:59:38,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:59:38,746 INFO L85 PathProgramCache]: Analyzing trace with hash -561388212, now seen corresponding path program 29 times [2022-01-18 06:59:38,746 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:59:38,746 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1782068658] [2022-01-18 06:59:38,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:59:38,746 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:59:38,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:59:39,048 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:59:39,048 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:59:39,048 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1782068658] [2022-01-18 06:59:39,048 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1782068658] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:59:39,048 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [641129848] [2022-01-18 06:59:39,048 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 06:59:39,048 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:59:39,048 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:59:39,049 INFO L229 MonitoredProcess]: Starting monitored process 70 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 06:59:39,050 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Waiting until timeout for monitored process [2022-01-18 06:59:39,072 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 06:59:39,072 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:59:39,073 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2022-01-18 06:59:39,073 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:59:39,486 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:59:39,491 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 06:59:39,491 INFO L387 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 109 treesize of output 83 [2022-01-18 06:59:39,900 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:59:39,900 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:59:40,459 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:59:40,476 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 06:59:40,476 INFO L387 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 227 treesize of output 181 [2022-01-18 06:59:42,117 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:59:42,117 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [641129848] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:59:42,117 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:59:42,117 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 26 [2022-01-18 06:59:42,117 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [898958545] [2022-01-18 06:59:42,117 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:59:42,118 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-18 06:59:42,118 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:59:42,118 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-18 06:59:42,118 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=529, Unknown=0, NotChecked=0, Total=650 [2022-01-18 06:59:42,118 INFO L87 Difference]: Start difference. First operand 3086 states and 11050 transitions. Second operand has 26 states, 26 states have (on average 2.3846153846153846) internal successors, (62), 26 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:59:51,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:59:51,422 INFO L93 Difference]: Finished difference Result 7294 states and 23620 transitions. [2022-01-18 06:59:51,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2022-01-18 06:59:51,423 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.3846153846153846) internal successors, (62), 26 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 26 [2022-01-18 06:59:51,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:59:51,434 INFO L225 Difference]: With dead ends: 7294 [2022-01-18 06:59:51,435 INFO L226 Difference]: Without dead ends: 7249 [2022-01-18 06:59:51,435 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 35 SyntacticMatches, 2 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4000 ImplicationChecksByTransitivity, 9.0s TimeCoverageRelationStatistics Valid=2031, Invalid=8271, Unknown=0, NotChecked=0, Total=10302 [2022-01-18 06:59:51,435 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 729 mSDsluCounter, 742 mSDsCounter, 0 mSdLazyCounter, 1094 mSolverCounterSat, 112 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 729 SdHoareTripleChecker+Valid, 465 SdHoareTripleChecker+Invalid, 2061 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 112 IncrementalHoareTripleChecker+Valid, 1094 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 855 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-18 06:59:51,436 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [729 Valid, 465 Invalid, 2061 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [112 Valid, 1094 Invalid, 0 Unknown, 855 Unchecked, 0.7s Time] [2022-01-18 06:59:51,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7249 states. [2022-01-18 06:59:51,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7249 to 3141. [2022-01-18 06:59:51,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3141 states, 3140 states have (on average 3.5929936305732486) internal successors, (11282), 3140 states have internal predecessors, (11282), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:59:51,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3141 states to 3141 states and 11282 transitions. [2022-01-18 06:59:51,549 INFO L78 Accepts]: Start accepts. Automaton has 3141 states and 11282 transitions. Word has length 26 [2022-01-18 06:59:51,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:59:51,549 INFO L470 AbstractCegarLoop]: Abstraction has 3141 states and 11282 transitions. [2022-01-18 06:59:51,549 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.3846153846153846) internal successors, (62), 26 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:59:51,549 INFO L276 IsEmpty]: Start isEmpty. Operand 3141 states and 11282 transitions. [2022-01-18 06:59:51,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 06:59:51,553 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:59:51,553 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:59:51,569 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Ended with exit code 0 [2022-01-18 06:59:51,768 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,70 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:59:51,769 INFO L402 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 06:59:51,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:59:51,769 INFO L85 PathProgramCache]: Analyzing trace with hash 238453832, now seen corresponding path program 30 times [2022-01-18 06:59:51,769 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:59:51,770 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1244438145] [2022-01-18 06:59:51,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:59:51,770 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:59:51,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:59:52,029 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:59:52,029 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:59:52,029 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1244438145] [2022-01-18 06:59:52,029 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1244438145] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:59:52,029 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1786906781] [2022-01-18 06:59:52,029 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 06:59:52,030 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:59:52,030 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:59:52,031 INFO L229 MonitoredProcess]: Starting monitored process 71 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 06:59:52,031 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Waiting until timeout for monitored process [2022-01-18 06:59:52,053 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 06:59:52,053 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:59:52,054 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2022-01-18 06:59:52,054 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:59:52,455 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:59:52,456 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:59:52,459 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 06:59:52,459 INFO L387 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 121 treesize of output 85 [2022-01-18 06:59:52,788 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:59:52,788 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:59:53,229 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:59:53,245 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 06:59:53,245 INFO L387 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 227 treesize of output 181 [2022-01-18 06:59:55,210 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:59:55,210 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1786906781] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:59:55,210 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:59:55,210 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 24 [2022-01-18 06:59:55,210 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1236588686] [2022-01-18 06:59:55,210 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:59:55,210 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-18 06:59:55,210 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:59:55,210 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-18 06:59:55,211 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=436, Unknown=0, NotChecked=0, Total=552 [2022-01-18 06:59:55,211 INFO L87 Difference]: Start difference. First operand 3141 states and 11282 transitions. Second operand has 24 states, 24 states have (on average 2.5416666666666665) internal successors, (61), 24 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) [2022-01-18 07:00:01,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 07:00:01,615 INFO L93 Difference]: Finished difference Result 7019 states and 22861 transitions. [2022-01-18 07:00:01,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2022-01-18 07:00:01,616 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.5416666666666665) internal successors, (61), 24 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 26 [2022-01-18 07:00:01,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 07:00:01,627 INFO L225 Difference]: With dead ends: 7019 [2022-01-18 07:00:01,628 INFO L226 Difference]: Without dead ends: 6985 [2022-01-18 07:00:01,628 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 35 SyntacticMatches, 4 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2387 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=1441, Invalid=5201, Unknown=0, NotChecked=0, Total=6642 [2022-01-18 07:00:01,632 INFO L933 BasicCegarLoop]: 51 mSDtfsCounter, 610 mSDsluCounter, 715 mSDsCounter, 0 mSdLazyCounter, 1564 mSolverCounterSat, 127 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 610 SdHoareTripleChecker+Valid, 472 SdHoareTripleChecker+Invalid, 1889 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 127 IncrementalHoareTripleChecker+Valid, 1564 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 198 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-01-18 07:00:01,632 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [610 Valid, 472 Invalid, 1889 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [127 Valid, 1564 Invalid, 0 Unknown, 198 Unchecked, 1.0s Time] [2022-01-18 07:00:01,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6985 states. [2022-01-18 07:00:01,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6985 to 3102. [2022-01-18 07:00:01,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3102 states, 3101 states have (on average 3.5872299258303775) internal successors, (11124), 3101 states have internal predecessors, (11124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 07:00:01,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3102 states to 3102 states and 11124 transitions. [2022-01-18 07:00:01,698 INFO L78 Accepts]: Start accepts. Automaton has 3102 states and 11124 transitions. Word has length 26 [2022-01-18 07:00:01,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 07:00:01,698 INFO L470 AbstractCegarLoop]: Abstraction has 3102 states and 11124 transitions. [2022-01-18 07:00:01,698 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.5416666666666665) internal successors, (61), 24 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) [2022-01-18 07:00:01,698 INFO L276 IsEmpty]: Start isEmpty. Operand 3102 states and 11124 transitions. [2022-01-18 07:00:01,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 07:00:01,702 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 07:00:01,703 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 07:00:01,718 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Forceful destruction successful, exit code 0 [2022-01-18 07:00:01,918 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,71 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 07:00:01,918 INFO L402 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 07:00:01,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 07:00:01,918 INFO L85 PathProgramCache]: Analyzing trace with hash 631833332, now seen corresponding path program 31 times [2022-01-18 07:00:01,918 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 07:00:01,918 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1990770815] [2022-01-18 07:00:01,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 07:00:01,919 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 07:00:01,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 07:00:02,302 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 07:00:02,302 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 07:00:02,302 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1990770815] [2022-01-18 07:00:02,302 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1990770815] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 07:00:02,302 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1649668764] [2022-01-18 07:00:02,302 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 07:00:02,302 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 07:00:02,302 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 07:00:02,311 INFO L229 MonitoredProcess]: Starting monitored process 72 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 07:00:02,312 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Waiting until timeout for monitored process [2022-01-18 07:00:02,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 07:00:02,335 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2022-01-18 07:00:02,336 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 07:00:04,040 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 07:00:04,041 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 07:00:04,041 INFO L387 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 109 treesize of output 75 [2022-01-18 07:00:04,132 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 07:00:04,132 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 07:00:04,530 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 07:00:04,530 INFO L387 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 187 treesize of output 173 [2022-01-18 07:00:07,008 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 07:00:07,008 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1649668764] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 07:00:07,008 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 07:00:07,008 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 24 [2022-01-18 07:00:07,008 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [677471453] [2022-01-18 07:00:07,008 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 07:00:07,008 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-18 07:00:07,008 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 07:00:07,008 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-18 07:00:07,008 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=443, Unknown=0, NotChecked=0, Total=552 [2022-01-18 07:00:07,009 INFO L87 Difference]: Start difference. First operand 3102 states and 11124 transitions. Second operand has 24 states, 24 states have (on average 2.5416666666666665) internal successors, (61), 24 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) [2022-01-18 07:00:09,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 07:00:09,607 INFO L93 Difference]: Finished difference Result 6009 states and 19708 transitions. [2022-01-18 07:00:09,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-01-18 07:00:09,607 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.5416666666666665) internal successors, (61), 24 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 26 [2022-01-18 07:00:09,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 07:00:09,619 INFO L225 Difference]: With dead ends: 6009 [2022-01-18 07:00:09,619 INFO L226 Difference]: Without dead ends: 5940 [2022-01-18 07:00:09,619 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 41 SyntacticMatches, 4 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1225 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=604, Invalid=2936, Unknown=0, NotChecked=0, Total=3540 [2022-01-18 07:00:09,619 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 295 mSDsluCounter, 676 mSDsCounter, 0 mSdLazyCounter, 913 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 295 SdHoareTripleChecker+Valid, 451 SdHoareTripleChecker+Invalid, 1152 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 913 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 194 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 07:00:09,619 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [295 Valid, 451 Invalid, 1152 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 913 Invalid, 0 Unknown, 194 Unchecked, 0.5s Time] [2022-01-18 07:00:09,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5940 states. [2022-01-18 07:00:09,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5940 to 3238. [2022-01-18 07:00:09,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3238 states, 3237 states have (on average 3.5974667902378745) internal successors, (11645), 3237 states have internal predecessors, (11645), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 07:00:09,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3238 states to 3238 states and 11645 transitions. [2022-01-18 07:00:09,693 INFO L78 Accepts]: Start accepts. Automaton has 3238 states and 11645 transitions. Word has length 26 [2022-01-18 07:00:09,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 07:00:09,693 INFO L470 AbstractCegarLoop]: Abstraction has 3238 states and 11645 transitions. [2022-01-18 07:00:09,693 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.5416666666666665) internal successors, (61), 24 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) [2022-01-18 07:00:09,693 INFO L276 IsEmpty]: Start isEmpty. Operand 3238 states and 11645 transitions. [2022-01-18 07:00:09,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 07:00:09,699 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 07:00:09,699 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 07:00:09,715 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Forceful destruction successful, exit code 0 [2022-01-18 07:00:09,912 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,72 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 07:00:09,912 INFO L402 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 07:00:09,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 07:00:09,912 INFO L85 PathProgramCache]: Analyzing trace with hash -862074390, now seen corresponding path program 32 times [2022-01-18 07:00:09,912 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 07:00:09,913 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1795422373] [2022-01-18 07:00:09,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 07:00:09,913 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 07:00:09,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 07:00:10,285 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 07:00:10,285 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 07:00:10,285 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1795422373] [2022-01-18 07:00:10,285 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1795422373] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 07:00:10,285 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [584373261] [2022-01-18 07:00:10,285 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 07:00:10,285 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 07:00:10,285 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 07:00:10,286 INFO L229 MonitoredProcess]: Starting monitored process 73 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 07:00:10,287 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Waiting until timeout for monitored process [2022-01-18 07:00:10,330 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 07:00:10,330 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 07:00:10,331 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2022-01-18 07:00:10,332 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 07:00:11,674 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 07:00:11,675 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 07:00:11,682 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 07:00:11,682 INFO L387 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 109 treesize of output 83 [2022-01-18 07:00:12,123 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 07:00:12,124 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 07:00:12,676 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 07:00:12,678 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 07:00:12,692 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 07:00:12,693 INFO L387 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 175 treesize of output 145 [2022-01-18 07:00:13,598 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 07:00:13,598 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [584373261] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 07:00:13,598 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 07:00:13,598 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 28 [2022-01-18 07:00:13,598 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1217497170] [2022-01-18 07:00:13,598 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 07:00:13,599 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-01-18 07:00:13,599 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 07:00:13,599 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-01-18 07:00:13,599 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=640, Unknown=0, NotChecked=0, Total=756 [2022-01-18 07:00:13,599 INFO L87 Difference]: Start difference. First operand 3238 states and 11645 transitions. Second operand has 28 states, 28 states have (on average 2.4285714285714284) internal successors, (68), 28 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 07:00:23,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 07:00:23,240 INFO L93 Difference]: Finished difference Result 7392 states and 24631 transitions. [2022-01-18 07:00:23,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 118 states. [2022-01-18 07:00:23,241 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.4285714285714284) internal successors, (68), 28 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-01-18 07:00:23,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 07:00:23,254 INFO L225 Difference]: With dead ends: 7392 [2022-01-18 07:00:23,254 INFO L226 Difference]: Without dead ends: 7347 [2022-01-18 07:00:23,255 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 58 SyntacticMatches, 6 SemanticMatches, 137 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7312 ImplicationChecksByTransitivity, 9.0s TimeCoverageRelationStatistics Valid=2310, Invalid=16872, Unknown=0, NotChecked=0, Total=19182 [2022-01-18 07:00:23,255 INFO L933 BasicCegarLoop]: 60 mSDtfsCounter, 579 mSDsluCounter, 1490 mSDsCounter, 0 mSdLazyCounter, 1705 mSolverCounterSat, 84 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 579 SdHoareTripleChecker+Valid, 979 SdHoareTripleChecker+Invalid, 3548 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 84 IncrementalHoareTripleChecker+Valid, 1705 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1759 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-01-18 07:00:23,255 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [579 Valid, 979 Invalid, 3548 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [84 Valid, 1705 Invalid, 0 Unknown, 1759 Unchecked, 1.1s Time] [2022-01-18 07:00:23,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7347 states. [2022-01-18 07:00:23,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7347 to 3275. [2022-01-18 07:00:23,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3275 states, 3274 states have (on average 3.6020158827122786) internal successors, (11793), 3274 states have internal predecessors, (11793), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 07:00:23,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3275 states to 3275 states and 11793 transitions. [2022-01-18 07:00:23,347 INFO L78 Accepts]: Start accepts. Automaton has 3275 states and 11793 transitions. Word has length 26 [2022-01-18 07:00:23,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 07:00:23,348 INFO L470 AbstractCegarLoop]: Abstraction has 3275 states and 11793 transitions. [2022-01-18 07:00:23,348 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.4285714285714284) internal successors, (68), 28 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 07:00:23,348 INFO L276 IsEmpty]: Start isEmpty. Operand 3275 states and 11793 transitions. [2022-01-18 07:00:23,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 07:00:23,352 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 07:00:23,352 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 07:00:23,368 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Forceful destruction successful, exit code 0 [2022-01-18 07:00:23,552 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,SelfDestructingSolverStorable74 [2022-01-18 07:00:23,553 INFO L402 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 07:00:23,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 07:00:23,553 INFO L85 PathProgramCache]: Analyzing trace with hash -985699448, now seen corresponding path program 33 times [2022-01-18 07:00:23,553 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 07:00:23,553 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1111598877] [2022-01-18 07:00:23,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 07:00:23,553 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 07:00:23,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 07:00:23,911 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 07:00:23,911 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 07:00:23,911 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1111598877] [2022-01-18 07:00:23,911 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1111598877] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 07:00:23,911 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [215232771] [2022-01-18 07:00:23,911 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 07:00:23,911 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 07:00:23,911 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 07:00:23,912 INFO L229 MonitoredProcess]: Starting monitored process 74 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 07:00:23,913 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Waiting until timeout for monitored process [2022-01-18 07:00:23,940 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 07:00:23,940 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 07:00:23,942 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 28 conjunts are in the unsatisfiable core [2022-01-18 07:00:23,943 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 07:00:24,335 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 07:00:24,335 INFO L387 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 109 treesize of output 91 [2022-01-18 07:00:25,235 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 07:00:25,236 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 07:00:25,824 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 07:00:25,825 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 07:00:25,839 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 07:00:25,839 INFO L387 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 191 treesize of output 149 [2022-01-18 07:00:26,476 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 07:00:26,476 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [215232771] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 07:00:26,476 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 07:00:26,476 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12, 12] total 28 [2022-01-18 07:00:26,476 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [645442877] [2022-01-18 07:00:26,476 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 07:00:26,476 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-01-18 07:00:26,476 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 07:00:26,477 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-01-18 07:00:26,477 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=629, Unknown=0, NotChecked=0, Total=756 [2022-01-18 07:00:26,477 INFO L87 Difference]: Start difference. First operand 3275 states and 11793 transitions. Second operand has 28 states, 28 states have (on average 2.4642857142857144) internal successors, (69), 28 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) [2022-01-18 07:00:35,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 07:00:35,698 INFO L93 Difference]: Finished difference Result 6743 states and 22901 transitions. [2022-01-18 07:00:35,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2022-01-18 07:00:35,699 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.4642857142857144) internal successors, (69), 28 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 26 [2022-01-18 07:00:35,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 07:00:35,711 INFO L225 Difference]: With dead ends: 6743 [2022-01-18 07:00:35,711 INFO L226 Difference]: Without dead ends: 6697 [2022-01-18 07:00:35,712 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 57 SyntacticMatches, 10 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4752 ImplicationChecksByTransitivity, 8.9s TimeCoverageRelationStatistics Valid=2072, Invalid=10138, Unknown=0, NotChecked=0, Total=12210 [2022-01-18 07:00:35,712 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 470 mSDsluCounter, 697 mSDsCounter, 0 mSdLazyCounter, 1288 mSolverCounterSat, 106 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 470 SdHoareTripleChecker+Valid, 535 SdHoareTripleChecker+Invalid, 1941 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 106 IncrementalHoareTripleChecker+Valid, 1288 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 547 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-18 07:00:35,712 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [470 Valid, 535 Invalid, 1941 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [106 Valid, 1288 Invalid, 0 Unknown, 547 Unchecked, 0.9s Time] [2022-01-18 07:00:35,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6697 states. [2022-01-18 07:00:35,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6697 to 3306. [2022-01-18 07:00:35,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3306 states, 3305 states have (on average 3.605446293494705) internal successors, (11916), 3305 states have internal predecessors, (11916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 07:00:35,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3306 states to 3306 states and 11916 transitions. [2022-01-18 07:00:35,778 INFO L78 Accepts]: Start accepts. Automaton has 3306 states and 11916 transitions. Word has length 26 [2022-01-18 07:00:35,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 07:00:35,778 INFO L470 AbstractCegarLoop]: Abstraction has 3306 states and 11916 transitions. [2022-01-18 07:00:35,778 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.4642857142857144) internal successors, (69), 28 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) [2022-01-18 07:00:35,778 INFO L276 IsEmpty]: Start isEmpty. Operand 3306 states and 11916 transitions. [2022-01-18 07:00:35,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 07:00:35,783 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 07:00:35,783 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 07:00:35,798 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Forceful destruction successful, exit code 0 [2022-01-18 07:00:35,995 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,74 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 07:00:35,995 INFO L402 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 07:00:35,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 07:00:35,996 INFO L85 PathProgramCache]: Analyzing trace with hash 1619324944, now seen corresponding path program 34 times [2022-01-18 07:00:35,996 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 07:00:35,996 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [380863034] [2022-01-18 07:00:35,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 07:00:35,996 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 07:00:35,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 07:00:36,320 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 07:00:36,320 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 07:00:36,320 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [380863034] [2022-01-18 07:00:36,320 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [380863034] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 07:00:36,320 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [422949283] [2022-01-18 07:00:36,320 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 07:00:36,320 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 07:00:36,320 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 07:00:36,321 INFO L229 MonitoredProcess]: Starting monitored process 75 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 07:00:36,322 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Waiting until timeout for monitored process [2022-01-18 07:00:36,343 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 07:00:36,343 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 07:00:36,344 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2022-01-18 07:00:36,344 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 07:00:36,732 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 07:00:36,736 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 07:00:36,736 INFO L387 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 109 treesize of output 83 [2022-01-18 07:00:37,043 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 07:00:37,044 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 07:00:37,603 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 07:00:37,624 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 07:00:37,624 INFO L387 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 241 treesize of output 181 [2022-01-18 07:00:39,305 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 07:00:39,306 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [422949283] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 07:00:39,306 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 07:00:39,306 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 24 [2022-01-18 07:00:39,306 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [262759207] [2022-01-18 07:00:39,306 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 07:00:39,306 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-18 07:00:39,306 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 07:00:39,306 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-18 07:00:39,306 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=445, Unknown=0, NotChecked=0, Total=552 [2022-01-18 07:00:39,306 INFO L87 Difference]: Start difference. First operand 3306 states and 11916 transitions. Second operand has 24 states, 24 states have (on average 2.5416666666666665) internal successors, (61), 24 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) [2022-01-18 07:00:43,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 07:00:43,806 INFO L93 Difference]: Finished difference Result 6291 states and 20823 transitions. [2022-01-18 07:00:43,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-01-18 07:00:43,806 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.5416666666666665) internal successors, (61), 24 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 26 [2022-01-18 07:00:43,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 07:00:43,818 INFO L225 Difference]: With dead ends: 6291 [2022-01-18 07:00:43,818 INFO L226 Difference]: Without dead ends: 6194 [2022-01-18 07:00:43,819 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 35 SyntacticMatches, 5 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1685 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=963, Invalid=4007, Unknown=0, NotChecked=0, Total=4970 [2022-01-18 07:00:43,819 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 438 mSDsluCounter, 648 mSDsCounter, 0 mSdLazyCounter, 1231 mSolverCounterSat, 80 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 438 SdHoareTripleChecker+Valid, 433 SdHoareTripleChecker+Invalid, 1806 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 80 IncrementalHoareTripleChecker+Valid, 1231 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 495 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-18 07:00:43,819 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [438 Valid, 433 Invalid, 1806 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [80 Valid, 1231 Invalid, 0 Unknown, 495 Unchecked, 0.7s Time] [2022-01-18 07:00:43,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6194 states. [2022-01-18 07:00:43,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6194 to 3301. [2022-01-18 07:00:43,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3301 states, 3300 states have (on average 3.6081818181818184) internal successors, (11907), 3300 states have internal predecessors, (11907), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 07:00:43,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3301 states to 3301 states and 11907 transitions. [2022-01-18 07:00:43,879 INFO L78 Accepts]: Start accepts. Automaton has 3301 states and 11907 transitions. Word has length 26 [2022-01-18 07:00:43,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 07:00:43,879 INFO L470 AbstractCegarLoop]: Abstraction has 3301 states and 11907 transitions. [2022-01-18 07:00:43,879 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.5416666666666665) internal successors, (61), 24 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) [2022-01-18 07:00:43,880 INFO L276 IsEmpty]: Start isEmpty. Operand 3301 states and 11907 transitions. [2022-01-18 07:00:43,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 07:00:43,884 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 07:00:43,884 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 07:00:43,900 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Forceful destruction successful, exit code 0 [2022-01-18 07:00:44,093 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76,75 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 07:00:44,093 INFO L402 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 07:00:44,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 07:00:44,093 INFO L85 PathProgramCache]: Analyzing trace with hash 1873169776, now seen corresponding path program 41 times [2022-01-18 07:00:44,093 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 07:00:44,093 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1521371323] [2022-01-18 07:00:44,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 07:00:44,094 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 07:00:44,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 07:00:44,440 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 07:00:44,440 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 07:00:44,440 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1521371323] [2022-01-18 07:00:44,440 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1521371323] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 07:00:44,440 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1100756251] [2022-01-18 07:00:44,441 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 07:00:44,441 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 07:00:44,441 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 07:00:44,455 INFO L229 MonitoredProcess]: Starting monitored process 76 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 07:00:44,456 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Waiting until timeout for monitored process [2022-01-18 07:00:44,477 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 07:00:44,478 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 07:00:44,478 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2022-01-18 07:00:44,479 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 07:00:44,892 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 07:00:44,893 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 07:00:44,895 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 07:00:44,895 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 07:00:44,895 INFO L387 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 115 treesize of output 75 [2022-01-18 07:00:44,967 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 07:00:44,967 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 07:00:45,383 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 07:00:45,383 INFO L387 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 215 treesize of output 149 [2022-01-18 07:00:46,020 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 07:00:46,021 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1100756251] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 07:00:46,021 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 07:00:46,021 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 9] total 24 [2022-01-18 07:00:46,021 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [540858918] [2022-01-18 07:00:46,021 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 07:00:46,022 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-18 07:00:46,022 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 07:00:46,022 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-18 07:00:46,022 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=506, Unknown=0, NotChecked=0, Total=600 [2022-01-18 07:00:46,022 INFO L87 Difference]: Start difference. First operand 3301 states and 11907 transitions. Second operand has 25 states, 25 states have (on average 2.76) internal successors, (69), 24 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) [2022-01-18 07:00:50,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 07:00:50,787 INFO L93 Difference]: Finished difference Result 5432 states and 18463 transitions. [2022-01-18 07:00:50,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2022-01-18 07:00:50,787 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.76) internal successors, (69), 24 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 26 [2022-01-18 07:00:50,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 07:00:50,797 INFO L225 Difference]: With dead ends: 5432 [2022-01-18 07:00:50,797 INFO L226 Difference]: Without dead ends: 5319 [2022-01-18 07:00:50,798 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1841 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=895, Invalid=4957, Unknown=0, NotChecked=0, Total=5852 [2022-01-18 07:00:50,798 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 336 mSDsluCounter, 912 mSDsCounter, 0 mSdLazyCounter, 1915 mSolverCounterSat, 93 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 336 SdHoareTripleChecker+Valid, 436 SdHoareTripleChecker+Invalid, 2008 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 93 IncrementalHoareTripleChecker+Valid, 1915 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-01-18 07:00:50,798 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [336 Valid, 436 Invalid, 2008 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [93 Valid, 1915 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-01-18 07:00:50,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5319 states. [2022-01-18 07:00:50,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5319 to 3318. [2022-01-18 07:00:50,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3318 states, 3317 states have (on average 3.605969249321676) internal successors, (11961), 3317 states have internal predecessors, (11961), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 07:00:50,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3318 states to 3318 states and 11961 transitions. [2022-01-18 07:00:50,853 INFO L78 Accepts]: Start accepts. Automaton has 3318 states and 11961 transitions. Word has length 26 [2022-01-18 07:00:50,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 07:00:50,853 INFO L470 AbstractCegarLoop]: Abstraction has 3318 states and 11961 transitions. [2022-01-18 07:00:50,853 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.76) internal successors, (69), 24 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) [2022-01-18 07:00:50,853 INFO L276 IsEmpty]: Start isEmpty. Operand 3318 states and 11961 transitions. [2022-01-18 07:00:50,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 07:00:50,857 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 07:00:50,857 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 07:00:50,875 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Forceful destruction successful, exit code 0 [2022-01-18 07:00:51,063 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,SelfDestructingSolverStorable77 [2022-01-18 07:00:51,063 INFO L402 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 07:00:51,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 07:00:51,064 INFO L85 PathProgramCache]: Analyzing trace with hash 471026418, now seen corresponding path program 42 times [2022-01-18 07:00:51,064 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 07:00:51,064 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1973261910] [2022-01-18 07:00:51,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 07:00:51,064 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 07:00:51,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 07:00:51,472 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 07:00:51,472 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 07:00:51,472 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1973261910] [2022-01-18 07:00:51,472 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1973261910] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 07:00:51,472 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [976192111] [2022-01-18 07:00:51,472 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 07:00:51,472 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 07:00:51,472 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 07:00:51,473 INFO L229 MonitoredProcess]: Starting monitored process 77 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 07:00:51,474 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Waiting until timeout for monitored process [2022-01-18 07:00:51,496 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-01-18 07:00:51,497 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 07:00:51,497 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-18 07:00:51,497 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 07:00:51,804 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 07:00:51,805 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 07:00:51,815 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 07:00:51,815 INFO L387 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 121 treesize of output 101 [2022-01-18 07:00:52,543 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 07:00:52,543 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 07:00:52,969 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 07:00:52,969 INFO L387 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 211 treesize of output 149 [2022-01-18 07:00:53,704 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 07:00:53,705 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [976192111] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 07:00:53,705 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 07:00:53,705 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 9] total 23 [2022-01-18 07:00:53,705 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1976512183] [2022-01-18 07:00:53,705 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 07:00:53,705 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-18 07:00:53,705 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 07:00:53,705 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-18 07:00:53,705 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=446, Unknown=0, NotChecked=0, Total=552 [2022-01-18 07:00:53,705 INFO L87 Difference]: Start difference. First operand 3318 states and 11961 transitions. Second operand has 24 states, 24 states have (on average 2.6666666666666665) internal successors, (64), 23 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 07:01:01,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 07:01:01,446 INFO L93 Difference]: Finished difference Result 7470 states and 24823 transitions. [2022-01-18 07:01:01,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2022-01-18 07:01:01,446 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.6666666666666665) internal successors, (64), 23 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-01-18 07:01:01,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 07:01:01,459 INFO L225 Difference]: With dead ends: 7470 [2022-01-18 07:01:01,459 INFO L226 Difference]: Without dead ends: 7426 [2022-01-18 07:01:01,460 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 37 SyntacticMatches, 2 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4737 ImplicationChecksByTransitivity, 7.0s TimeCoverageRelationStatistics Valid=2597, Invalid=9835, Unknown=0, NotChecked=0, Total=12432 [2022-01-18 07:01:01,460 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 601 mSDsluCounter, 846 mSDsCounter, 0 mSdLazyCounter, 1827 mSolverCounterSat, 208 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 601 SdHoareTripleChecker+Valid, 447 SdHoareTripleChecker+Invalid, 2035 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 208 IncrementalHoareTripleChecker+Valid, 1827 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-01-18 07:01:01,460 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [601 Valid, 447 Invalid, 2035 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [208 Valid, 1827 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-01-18 07:01:01,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7426 states. [2022-01-18 07:01:01,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7426 to 3332. [2022-01-18 07:01:01,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3332 states, 3331 states have (on average 3.60402281597118) internal successors, (12005), 3331 states have internal predecessors, (12005), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 07:01:01,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3332 states to 3332 states and 12005 transitions. [2022-01-18 07:01:01,536 INFO L78 Accepts]: Start accepts. Automaton has 3332 states and 12005 transitions. Word has length 26 [2022-01-18 07:01:01,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 07:01:01,536 INFO L470 AbstractCegarLoop]: Abstraction has 3332 states and 12005 transitions. [2022-01-18 07:01:01,536 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.6666666666666665) internal successors, (64), 23 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 07:01:01,536 INFO L276 IsEmpty]: Start isEmpty. Operand 3332 states and 12005 transitions. [2022-01-18 07:01:01,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 07:01:01,540 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 07:01:01,540 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 07:01:01,556 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Forceful destruction successful, exit code 0 [2022-01-18 07:01:01,755 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 77 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable78 [2022-01-18 07:01:01,755 INFO L402 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 07:01:01,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 07:01:01,756 INFO L85 PathProgramCache]: Analyzing trace with hash 1954161356, now seen corresponding path program 43 times [2022-01-18 07:01:01,756 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 07:01:01,756 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [220278112] [2022-01-18 07:01:01,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 07:01:01,756 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 07:01:01,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 07:01:02,031 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 07:01:02,032 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 07:01:02,032 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [220278112] [2022-01-18 07:01:02,032 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [220278112] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 07:01:02,032 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [854069259] [2022-01-18 07:01:02,032 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 07:01:02,032 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 07:01:02,032 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 07:01:02,033 INFO L229 MonitoredProcess]: Starting monitored process 78 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 07:01:02,034 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Waiting until timeout for monitored process [2022-01-18 07:01:02,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 07:01:02,054 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-18 07:01:02,055 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 07:01:02,470 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 07:01:02,471 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 07:01:02,471 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 07:01:02,472 INFO L387 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 121 treesize of output 75 [2022-01-18 07:01:02,595 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 07:01:02,595 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 07:01:02,955 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 07:01:02,956 INFO L387 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 211 treesize of output 149 [2022-01-18 07:01:03,478 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 07:01:03,478 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [854069259] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 07:01:03,478 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 07:01:03,479 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 9] total 23 [2022-01-18 07:01:03,479 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [343754668] [2022-01-18 07:01:03,479 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 07:01:03,479 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-18 07:01:03,479 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 07:01:03,479 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-18 07:01:03,479 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=461, Unknown=0, NotChecked=0, Total=552 [2022-01-18 07:01:03,480 INFO L87 Difference]: Start difference. First operand 3332 states and 12005 transitions. Second operand has 24 states, 24 states have (on average 2.6666666666666665) internal successors, (64), 23 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 07:01:11,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 07:01:11,117 INFO L93 Difference]: Finished difference Result 6492 states and 21819 transitions. [2022-01-18 07:01:11,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 106 states. [2022-01-18 07:01:11,117 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.6666666666666665) internal successors, (64), 23 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-01-18 07:01:11,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 07:01:11,129 INFO L225 Difference]: With dead ends: 6492 [2022-01-18 07:01:11,129 INFO L226 Difference]: Without dead ends: 6462 [2022-01-18 07:01:11,129 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 37 SyntacticMatches, 2 SemanticMatches, 120 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5854 ImplicationChecksByTransitivity, 6.8s TimeCoverageRelationStatistics Valid=2577, Invalid=12185, Unknown=0, NotChecked=0, Total=14762 [2022-01-18 07:01:11,130 INFO L933 BasicCegarLoop]: 58 mSDtfsCounter, 567 mSDsluCounter, 989 mSDsCounter, 0 mSdLazyCounter, 2090 mSolverCounterSat, 208 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 567 SdHoareTripleChecker+Valid, 563 SdHoareTripleChecker+Invalid, 2389 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 208 IncrementalHoareTripleChecker+Valid, 2090 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 91 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-01-18 07:01:11,130 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [567 Valid, 563 Invalid, 2389 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [208 Valid, 2090 Invalid, 0 Unknown, 91 Unchecked, 1.1s Time] [2022-01-18 07:01:11,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6462 states. [2022-01-18 07:01:11,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6462 to 3317. [2022-01-18 07:01:11,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3317 states, 3316 states have (on average 3.6022316043425815) internal successors, (11945), 3316 states have internal predecessors, (11945), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 07:01:11,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3317 states to 3317 states and 11945 transitions. [2022-01-18 07:01:11,197 INFO L78 Accepts]: Start accepts. Automaton has 3317 states and 11945 transitions. Word has length 26 [2022-01-18 07:01:11,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 07:01:11,197 INFO L470 AbstractCegarLoop]: Abstraction has 3317 states and 11945 transitions. [2022-01-18 07:01:11,197 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.6666666666666665) internal successors, (64), 23 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 07:01:11,197 INFO L276 IsEmpty]: Start isEmpty. Operand 3317 states and 11945 transitions. [2022-01-18 07:01:11,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 07:01:11,202 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 07:01:11,202 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 07:01:11,217 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Forceful destruction successful, exit code 0 [2022-01-18 07:01:11,417 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79,78 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 07:01:11,417 INFO L402 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 07:01:11,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 07:01:11,417 INFO L85 PathProgramCache]: Analyzing trace with hash -1160998976, now seen corresponding path program 35 times [2022-01-18 07:01:11,417 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 07:01:11,417 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1039657797] [2022-01-18 07:01:11,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 07:01:11,417 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 07:01:11,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 07:01:11,822 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 07:01:11,823 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 07:01:11,823 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1039657797] [2022-01-18 07:01:11,823 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1039657797] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 07:01:11,823 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1888289314] [2022-01-18 07:01:11,823 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 07:01:11,823 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 07:01:11,823 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 07:01:11,824 INFO L229 MonitoredProcess]: Starting monitored process 79 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 07:01:11,825 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Waiting until timeout for monitored process [2022-01-18 07:01:11,851 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 07:01:11,851 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 07:01:11,852 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 23 conjunts are in the unsatisfiable core [2022-01-18 07:01:11,853 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 07:01:12,366 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 07:01:12,373 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 07:01:12,373 INFO L387 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 109 treesize of output 91 [2022-01-18 07:01:13,010 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 07:01:13,010 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 07:01:13,544 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 07:01:13,544 INFO L387 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 183 treesize of output 169 [2022-01-18 07:01:16,245 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 07:01:16,245 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1888289314] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 07:01:16,245 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 07:01:16,245 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 26 [2022-01-18 07:01:16,245 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1652358026] [2022-01-18 07:01:16,245 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 07:01:16,246 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-18 07:01:16,246 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 07:01:16,246 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-18 07:01:16,246 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=531, Unknown=0, NotChecked=0, Total=650 [2022-01-18 07:01:16,246 INFO L87 Difference]: Start difference. First operand 3317 states and 11945 transitions. Second operand has 26 states, 26 states have (on average 2.3846153846153846) internal successors, (62), 26 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 07:01:28,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 07:01:28,858 INFO L93 Difference]: Finished difference Result 8853 states and 28739 transitions. [2022-01-18 07:01:28,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 108 states. [2022-01-18 07:01:28,858 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.3846153846153846) internal successors, (62), 26 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 26 [2022-01-18 07:01:28,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 07:01:28,873 INFO L225 Difference]: With dead ends: 8853 [2022-01-18 07:01:28,874 INFO L226 Difference]: Without dead ends: 8806 [2022-01-18 07:01:28,875 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 39 SyntacticMatches, 8 SemanticMatches, 122 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6256 ImplicationChecksByTransitivity, 12.3s TimeCoverageRelationStatistics Valid=2532, Invalid=12720, Unknown=0, NotChecked=0, Total=15252 [2022-01-18 07:01:28,875 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 654 mSDsluCounter, 731 mSDsCounter, 0 mSdLazyCounter, 1143 mSolverCounterSat, 120 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 654 SdHoareTripleChecker+Valid, 411 SdHoareTripleChecker+Invalid, 1861 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 120 IncrementalHoareTripleChecker+Valid, 1143 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 598 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-18 07:01:28,875 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [654 Valid, 411 Invalid, 1861 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [120 Valid, 1143 Invalid, 0 Unknown, 598 Unchecked, 0.8s Time] [2022-01-18 07:01:28,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8806 states. [2022-01-18 07:01:28,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8806 to 3429. [2022-01-18 07:01:28,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3429 states, 3428 states have (on average 3.615227537922987) internal successors, (12393), 3428 states have internal predecessors, (12393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 07:01:28,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3429 states to 3429 states and 12393 transitions. [2022-01-18 07:01:28,974 INFO L78 Accepts]: Start accepts. Automaton has 3429 states and 12393 transitions. Word has length 26 [2022-01-18 07:01:28,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 07:01:28,975 INFO L470 AbstractCegarLoop]: Abstraction has 3429 states and 12393 transitions. [2022-01-18 07:01:28,975 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.3846153846153846) internal successors, (62), 26 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 07:01:28,975 INFO L276 IsEmpty]: Start isEmpty. Operand 3429 states and 12393 transitions. [2022-01-18 07:01:28,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 07:01:28,980 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 07:01:28,980 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 07:01:28,996 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Forceful destruction successful, exit code 0 [2022-01-18 07:01:29,187 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,79 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 07:01:29,188 INFO L402 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 07:01:29,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 07:01:29,189 INFO L85 PathProgramCache]: Analyzing trace with hash 96228536, now seen corresponding path program 36 times [2022-01-18 07:01:29,189 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 07:01:29,189 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [797309834] [2022-01-18 07:01:29,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 07:01:29,190 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 07:01:29,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 07:01:29,465 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 07:01:29,465 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 07:01:29,465 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [797309834] [2022-01-18 07:01:29,466 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [797309834] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 07:01:29,466 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1568396553] [2022-01-18 07:01:29,466 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 07:01:29,466 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 07:01:29,466 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 07:01:29,467 INFO L229 MonitoredProcess]: Starting monitored process 80 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 07:01:29,468 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Waiting until timeout for monitored process [2022-01-18 07:01:29,491 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 07:01:29,491 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 07:01:29,492 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2022-01-18 07:01:29,492 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 07:01:29,926 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 07:01:29,930 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 07:01:29,931 INFO L387 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 109 treesize of output 83 [2022-01-18 07:01:30,186 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 07:01:30,186 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 07:01:30,523 INFO L353 Elim1Store]: treesize reduction 10, result has 81.8 percent of original size [2022-01-18 07:01:30,523 INFO L387 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 187 treesize of output 157 [2022-01-18 07:01:31,790 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 07:01:31,790 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1568396553] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 07:01:31,790 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 07:01:31,791 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 26 [2022-01-18 07:01:31,791 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [903769514] [2022-01-18 07:01:31,791 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 07:01:31,791 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-18 07:01:31,791 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 07:01:31,791 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-18 07:01:31,791 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=543, Unknown=0, NotChecked=0, Total=650 [2022-01-18 07:01:31,791 INFO L87 Difference]: Start difference. First operand 3429 states and 12393 transitions. Second operand has 26 states, 26 states have (on average 2.576923076923077) internal successors, (67), 26 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) [2022-01-18 07:01:35,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 07:01:35,101 INFO L93 Difference]: Finished difference Result 5805 states and 19652 transitions. [2022-01-18 07:01:35,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-01-18 07:01:35,102 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.576923076923077) internal successors, (67), 26 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 26 [2022-01-18 07:01:35,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 07:01:35,116 INFO L225 Difference]: With dead ends: 5805 [2022-01-18 07:01:35,116 INFO L226 Difference]: Without dead ends: 5768 [2022-01-18 07:01:35,117 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1572 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=693, Invalid=4563, Unknown=0, NotChecked=0, Total=5256 [2022-01-18 07:01:35,117 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 307 mSDsluCounter, 665 mSDsCounter, 0 mSdLazyCounter, 1577 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 307 SdHoareTripleChecker+Valid, 356 SdHoareTripleChecker+Invalid, 1635 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 1577 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-18 07:01:35,117 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [307 Valid, 356 Invalid, 1635 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 1577 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-18 07:01:35,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5768 states. [2022-01-18 07:01:35,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5768 to 3411. [2022-01-18 07:01:35,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3411 states, 3410 states have (on average 3.6173020527859236) internal successors, (12335), 3410 states have internal predecessors, (12335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 07:01:35,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3411 states to 3411 states and 12335 transitions. [2022-01-18 07:01:35,213 INFO L78 Accepts]: Start accepts. Automaton has 3411 states and 12335 transitions. Word has length 26 [2022-01-18 07:01:35,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 07:01:35,214 INFO L470 AbstractCegarLoop]: Abstraction has 3411 states and 12335 transitions. [2022-01-18 07:01:35,214 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.576923076923077) internal successors, (67), 26 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) [2022-01-18 07:01:35,214 INFO L276 IsEmpty]: Start isEmpty. Operand 3411 states and 12335 transitions. [2022-01-18 07:01:35,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 07:01:35,221 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 07:01:35,221 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 07:01:35,243 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Forceful destruction successful, exit code 0 [2022-01-18 07:01:35,423 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,SelfDestructingSolverStorable81 [2022-01-18 07:01:35,423 INFO L402 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 07:01:35,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 07:01:35,423 INFO L85 PathProgramCache]: Analyzing trace with hash -1193122220, now seen corresponding path program 37 times [2022-01-18 07:01:35,423 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 07:01:35,424 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1818490616] [2022-01-18 07:01:35,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 07:01:35,424 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 07:01:35,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 07:01:35,590 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 07:01:35,590 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 07:01:35,590 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1818490616] [2022-01-18 07:01:35,590 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1818490616] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 07:01:35,590 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [859842105] [2022-01-18 07:01:35,590 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 07:01:35,590 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 07:01:35,591 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 07:01:35,591 INFO L229 MonitoredProcess]: Starting monitored process 81 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 07:01:35,592 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Waiting until timeout for monitored process [2022-01-18 07:01:35,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 07:01:35,623 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-18 07:01:35,623 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 07:01:36,073 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 07:01:36,076 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 07:01:36,076 INFO L387 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 109 treesize of output 83 [2022-01-18 07:01:36,273 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 07:01:36,273 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 07:01:36,595 INFO L353 Elim1Store]: treesize reduction 10, result has 81.8 percent of original size [2022-01-18 07:01:36,595 INFO L387 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 191 treesize of output 157 [2022-01-18 07:01:37,754 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 07:01:37,755 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [859842105] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 07:01:37,755 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 07:01:37,755 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 26 [2022-01-18 07:01:37,755 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [88082761] [2022-01-18 07:01:37,755 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 07:01:37,755 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-18 07:01:37,755 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 07:01:37,755 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-18 07:01:37,755 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=538, Unknown=0, NotChecked=0, Total=650 [2022-01-18 07:01:37,755 INFO L87 Difference]: Start difference. First operand 3411 states and 12335 transitions. Second operand has 26 states, 26 states have (on average 2.576923076923077) internal successors, (67), 26 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) [2022-01-18 07:01:42,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 07:01:42,283 INFO L93 Difference]: Finished difference Result 6477 states and 21608 transitions. [2022-01-18 07:01:42,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2022-01-18 07:01:42,284 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.576923076923077) internal successors, (67), 26 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 26 [2022-01-18 07:01:42,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 07:01:42,294 INFO L225 Difference]: With dead ends: 6477 [2022-01-18 07:01:42,294 INFO L226 Difference]: Without dead ends: 6366 [2022-01-18 07:01:42,295 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2042 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=1044, Invalid=5598, Unknown=0, NotChecked=0, Total=6642 [2022-01-18 07:01:42,295 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 344 mSDsluCounter, 804 mSDsCounter, 0 mSdLazyCounter, 1875 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 344 SdHoareTripleChecker+Valid, 395 SdHoareTripleChecker+Invalid, 1940 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 1875 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-18 07:01:42,295 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [344 Valid, 395 Invalid, 1940 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 1875 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-18 07:01:42,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6366 states. [2022-01-18 07:01:42,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6366 to 3407. [2022-01-18 07:01:42,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3407 states, 3406 states have (on average 3.6174398120963005) internal successors, (12321), 3406 states have internal predecessors, (12321), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 07:01:42,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3407 states to 3407 states and 12321 transitions. [2022-01-18 07:01:42,357 INFO L78 Accepts]: Start accepts. Automaton has 3407 states and 12321 transitions. Word has length 26 [2022-01-18 07:01:42,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 07:01:42,357 INFO L470 AbstractCegarLoop]: Abstraction has 3407 states and 12321 transitions. [2022-01-18 07:01:42,357 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.576923076923077) internal successors, (67), 26 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) [2022-01-18 07:01:42,357 INFO L276 IsEmpty]: Start isEmpty. Operand 3407 states and 12321 transitions. [2022-01-18 07:01:42,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 07:01:42,362 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 07:01:42,362 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 07:01:42,379 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Forceful destruction successful, exit code 0 [2022-01-18 07:01:42,577 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,81 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 07:01:42,578 INFO L402 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 07:01:42,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 07:01:42,578 INFO L85 PathProgramCache]: Analyzing trace with hash -1298273478, now seen corresponding path program 38 times [2022-01-18 07:01:42,578 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 07:01:42,578 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [877838047] [2022-01-18 07:01:42,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 07:01:42,578 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 07:01:42,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 07:01:42,738 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 07:01:42,738 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 07:01:42,739 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [877838047] [2022-01-18 07:01:42,739 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [877838047] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 07:01:42,739 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1727306235] [2022-01-18 07:01:42,739 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 07:01:42,739 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 07:01:42,739 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 07:01:42,740 INFO L229 MonitoredProcess]: Starting monitored process 82 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 07:01:42,740 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Waiting until timeout for monitored process [2022-01-18 07:01:42,762 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 07:01:42,762 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 07:01:42,763 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2022-01-18 07:01:42,763 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 07:01:43,189 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 07:01:43,196 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 07:01:43,196 INFO L387 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 109 treesize of output 91 [2022-01-18 07:01:43,754 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 07:01:43,754 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 07:01:44,162 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 07:01:44,163 INFO L387 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 171 treesize of output 161 [2022-01-18 07:01:47,177 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 07:01:47,177 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1727306235] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 07:01:47,178 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 07:01:47,178 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 11] total 27 [2022-01-18 07:01:47,178 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1369900128] [2022-01-18 07:01:47,178 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 07:01:47,178 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-01-18 07:01:47,178 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 07:01:47,178 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-01-18 07:01:47,178 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=587, Unknown=0, NotChecked=0, Total=702 [2022-01-18 07:01:47,178 INFO L87 Difference]: Start difference. First operand 3407 states and 12321 transitions. Second operand has 27 states, 27 states have (on average 2.5185185185185186) internal successors, (68), 27 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 07:01:51,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 07:01:51,236 INFO L93 Difference]: Finished difference Result 5631 states and 18958 transitions. [2022-01-18 07:01:51,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-01-18 07:01:51,236 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5185185185185186) internal successors, (68), 27 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-01-18 07:01:51,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 07:01:51,246 INFO L225 Difference]: With dead ends: 5631 [2022-01-18 07:01:51,246 INFO L226 Difference]: Without dead ends: 5580 [2022-01-18 07:01:51,247 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1394 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=793, Invalid=3763, Unknown=0, NotChecked=0, Total=4556 [2022-01-18 07:01:51,247 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 341 mSDsluCounter, 756 mSDsCounter, 0 mSdLazyCounter, 1369 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 341 SdHoareTripleChecker+Valid, 384 SdHoareTripleChecker+Invalid, 1582 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 1369 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 155 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-18 07:01:51,247 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [341 Valid, 384 Invalid, 1582 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 1369 Invalid, 0 Unknown, 155 Unchecked, 0.7s Time] [2022-01-18 07:01:51,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5580 states. [2022-01-18 07:01:51,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5580 to 3462. [2022-01-18 07:01:51,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3462 states, 3461 states have (on average 3.6177405374169314) internal successors, (12521), 3461 states have internal predecessors, (12521), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 07:01:51,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3462 states to 3462 states and 12521 transitions. [2022-01-18 07:01:51,306 INFO L78 Accepts]: Start accepts. Automaton has 3462 states and 12521 transitions. Word has length 26 [2022-01-18 07:01:51,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 07:01:51,306 INFO L470 AbstractCegarLoop]: Abstraction has 3462 states and 12521 transitions. [2022-01-18 07:01:51,306 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.5185185185185186) internal successors, (68), 27 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 07:01:51,306 INFO L276 IsEmpty]: Start isEmpty. Operand 3462 states and 12521 transitions. [2022-01-18 07:01:51,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 07:01:51,311 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 07:01:51,311 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 07:01:51,327 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Forceful destruction successful, exit code 0 [2022-01-18 07:01:51,526 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83,82 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 07:01:51,527 INFO L402 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 07:01:51,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 07:01:51,527 INFO L85 PathProgramCache]: Analyzing trace with hash -619873932, now seen corresponding path program 39 times [2022-01-18 07:01:51,527 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 07:01:51,527 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [24369639] [2022-01-18 07:01:51,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 07:01:51,527 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 07:01:51,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 07:01:51,696 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 07:01:51,696 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 07:01:51,696 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [24369639] [2022-01-18 07:01:51,696 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [24369639] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 07:01:51,696 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1724317986] [2022-01-18 07:01:51,696 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 07:01:51,697 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 07:01:51,697 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 07:01:51,697 INFO L229 MonitoredProcess]: Starting monitored process 83 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 07:01:51,698 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Waiting until timeout for monitored process [2022-01-18 07:01:51,719 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 07:01:51,719 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 07:01:51,720 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2022-01-18 07:01:51,720 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 07:01:53,395 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 07:01:53,395 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 07:01:53,396 INFO L387 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 109 treesize of output 75 [2022-01-18 07:01:53,551 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 07:01:53,551 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 07:01:53,884 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 07:01:53,884 INFO L387 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 175 treesize of output 161 [2022-01-18 07:02:02,793 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 07:02:02,793 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1724317986] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 07:02:02,793 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 07:02:02,793 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-01-18 07:02:02,794 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [742978021] [2022-01-18 07:02:02,794 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 07:02:02,794 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-18 07:02:02,794 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 07:02:02,794 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-18 07:02:02,794 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=484, Unknown=0, NotChecked=0, Total=600 [2022-01-18 07:02:02,794 INFO L87 Difference]: Start difference. First operand 3462 states and 12521 transitions. Second operand has 25 states, 25 states have (on average 2.48) internal successors, (62), 25 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 07:02:05,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 07:02:05,089 INFO L93 Difference]: Finished difference Result 5326 states and 18167 transitions. [2022-01-18 07:02:05,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-01-18 07:02:05,089 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.48) internal successors, (62), 25 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 26 [2022-01-18 07:02:05,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 07:02:05,098 INFO L225 Difference]: With dead ends: 5326 [2022-01-18 07:02:05,098 INFO L226 Difference]: Without dead ends: 5284 [2022-01-18 07:02:05,098 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 35 SyntacticMatches, 3 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1051 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=585, Invalid=2721, Unknown=0, NotChecked=0, Total=3306 [2022-01-18 07:02:05,098 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 293 mSDsluCounter, 536 mSDsCounter, 0 mSdLazyCounter, 894 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 293 SdHoareTripleChecker+Valid, 270 SdHoareTripleChecker+Invalid, 1325 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 894 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 368 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 07:02:05,098 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [293 Valid, 270 Invalid, 1325 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 894 Invalid, 0 Unknown, 368 Unchecked, 0.4s Time] [2022-01-18 07:02:05,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5284 states. [2022-01-18 07:02:05,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5284 to 3478. [2022-01-18 07:02:05,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3478 states, 3477 states have (on average 3.616623526028185) internal successors, (12575), 3477 states have internal predecessors, (12575), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 07:02:05,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3478 states to 3478 states and 12575 transitions. [2022-01-18 07:02:05,153 INFO L78 Accepts]: Start accepts. Automaton has 3478 states and 12575 transitions. Word has length 26 [2022-01-18 07:02:05,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 07:02:05,154 INFO L470 AbstractCegarLoop]: Abstraction has 3478 states and 12575 transitions. [2022-01-18 07:02:05,154 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.48) internal successors, (62), 25 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 07:02:05,154 INFO L276 IsEmpty]: Start isEmpty. Operand 3478 states and 12575 transitions. [2022-01-18 07:02:05,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 07:02:05,158 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 07:02:05,158 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 07:02:05,174 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Forceful destruction successful, exit code 0 [2022-01-18 07:02:05,370 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,SelfDestructingSolverStorable84 [2022-01-18 07:02:05,370 INFO L402 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 07:02:05,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 07:02:05,371 INFO L85 PathProgramCache]: Analyzing trace with hash -99997454, now seen corresponding path program 40 times [2022-01-18 07:02:05,371 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 07:02:05,371 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1354749051] [2022-01-18 07:02:05,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 07:02:05,371 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 07:02:05,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 07:02:05,722 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 07:02:05,723 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 07:02:05,723 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1354749051] [2022-01-18 07:02:05,723 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1354749051] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 07:02:05,723 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [538380483] [2022-01-18 07:02:05,723 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 07:02:05,723 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 07:02:05,723 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 07:02:05,739 INFO L229 MonitoredProcess]: Starting monitored process 84 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 07:02:05,740 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Waiting until timeout for monitored process [2022-01-18 07:02:05,770 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 07:02:05,770 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 07:02:05,772 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2022-01-18 07:02:05,773 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 07:02:06,169 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 07:02:06,174 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 07:02:06,174 INFO L387 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 109 treesize of output 83 [2022-01-18 07:02:06,504 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 07:02:06,504 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 07:02:06,870 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 07:02:06,887 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 07:02:06,887 INFO L387 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 195 treesize of output 161 [2022-01-18 07:02:09,247 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 07:02:09,247 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [538380483] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 07:02:09,247 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 07:02:09,248 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 23 [2022-01-18 07:02:09,248 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [87050147] [2022-01-18 07:02:09,248 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 07:02:09,248 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-18 07:02:09,248 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 07:02:09,248 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-18 07:02:09,248 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=408, Unknown=0, NotChecked=0, Total=506 [2022-01-18 07:02:09,248 INFO L87 Difference]: Start difference. First operand 3478 states and 12575 transitions. Second operand has 23 states, 23 states have (on average 2.6956521739130435) internal successors, (62), 23 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 07:02:11,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 07:02:11,700 INFO L93 Difference]: Finished difference Result 5614 states and 19217 transitions. [2022-01-18 07:02:11,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-01-18 07:02:11,700 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.6956521739130435) internal successors, (62), 23 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 26 [2022-01-18 07:02:11,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 07:02:11,709 INFO L225 Difference]: With dead ends: 5614 [2022-01-18 07:02:11,709 INFO L226 Difference]: Without dead ends: 5580 [2022-01-18 07:02:11,710 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 36 SyntacticMatches, 6 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1057 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=644, Invalid=2896, Unknown=0, NotChecked=0, Total=3540 [2022-01-18 07:02:11,710 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 254 mSDsluCounter, 491 mSDsCounter, 0 mSdLazyCounter, 794 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 254 SdHoareTripleChecker+Valid, 335 SdHoareTripleChecker+Invalid, 1153 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 794 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 309 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 07:02:11,710 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [254 Valid, 335 Invalid, 1153 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 794 Invalid, 0 Unknown, 309 Unchecked, 0.4s Time] [2022-01-18 07:02:11,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5580 states. [2022-01-18 07:02:11,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5580 to 3455. [2022-01-18 07:02:11,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3455 states, 3454 states have (on average 3.615807759119861) internal successors, (12489), 3454 states have internal predecessors, (12489), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 07:02:11,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3455 states to 3455 states and 12489 transitions. [2022-01-18 07:02:11,771 INFO L78 Accepts]: Start accepts. Automaton has 3455 states and 12489 transitions. Word has length 26 [2022-01-18 07:02:11,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 07:02:11,771 INFO L470 AbstractCegarLoop]: Abstraction has 3455 states and 12489 transitions. [2022-01-18 07:02:11,771 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.6956521739130435) internal successors, (62), 23 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 07:02:11,772 INFO L276 IsEmpty]: Start isEmpty. Operand 3455 states and 12489 transitions. [2022-01-18 07:02:11,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 07:02:11,776 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 07:02:11,776 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 07:02:11,792 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Forceful destruction successful, exit code 0 [2022-01-18 07:02:11,986 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85,84 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 07:02:11,986 INFO L402 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 07:02:11,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 07:02:11,986 INFO L85 PathProgramCache]: Analyzing trace with hash -574976500, now seen corresponding path program 41 times [2022-01-18 07:02:11,986 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 07:02:11,986 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [149426207] [2022-01-18 07:02:11,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 07:02:11,987 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 07:02:11,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 07:02:12,127 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 07:02:12,128 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 07:02:12,128 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [149426207] [2022-01-18 07:02:12,128 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [149426207] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 07:02:12,128 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [344906327] [2022-01-18 07:02:12,128 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 07:02:12,128 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 07:02:12,129 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 07:02:12,130 INFO L229 MonitoredProcess]: Starting monitored process 85 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 07:02:12,131 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Waiting until timeout for monitored process [2022-01-18 07:02:12,155 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 07:02:12,155 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 07:02:12,156 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2022-01-18 07:02:12,157 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 07:02:12,597 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 07:02:12,597 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 07:02:12,597 INFO L387 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 109 treesize of output 75 [2022-01-18 07:02:12,668 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 07:02:12,668 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 07:02:12,916 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 07:02:12,929 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 07:02:12,929 INFO L387 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 187 treesize of output 157 [2022-01-18 07:02:14,512 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 07:02:14,512 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [344906327] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 07:02:14,513 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 07:02:14,513 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 27 [2022-01-18 07:02:14,513 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [231047369] [2022-01-18 07:02:14,513 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 07:02:14,513 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-01-18 07:02:14,513 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 07:02:14,516 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-01-18 07:02:14,531 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=592, Unknown=0, NotChecked=0, Total=702 [2022-01-18 07:02:14,531 INFO L87 Difference]: Start difference. First operand 3455 states and 12489 transitions. Second operand has 27 states, 27 states have (on average 2.5185185185185186) internal successors, (68), 27 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 07:02:20,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 07:02:20,758 INFO L93 Difference]: Finished difference Result 6614 states and 21741 transitions. [2022-01-18 07:02:20,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2022-01-18 07:02:20,758 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5185185185185186) internal successors, (68), 27 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-01-18 07:02:20,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 07:02:20,770 INFO L225 Difference]: With dead ends: 6614 [2022-01-18 07:02:20,770 INFO L226 Difference]: Without dead ends: 6496 [2022-01-18 07:02:20,771 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 114 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4608 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=1754, Invalid=11586, Unknown=0, NotChecked=0, Total=13340 [2022-01-18 07:02:20,771 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 449 mSDsluCounter, 762 mSDsCounter, 0 mSdLazyCounter, 1755 mSolverCounterSat, 84 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 449 SdHoareTripleChecker+Valid, 425 SdHoareTripleChecker+Invalid, 1839 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 84 IncrementalHoareTripleChecker+Valid, 1755 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-01-18 07:02:20,771 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [449 Valid, 425 Invalid, 1839 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [84 Valid, 1755 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-01-18 07:02:20,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6496 states. [2022-01-18 07:02:20,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6496 to 3607. [2022-01-18 07:02:20,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3607 states, 3606 states have (on average 3.6181364392678868) internal successors, (13047), 3606 states have internal predecessors, (13047), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 07:02:20,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3607 states to 3607 states and 13047 transitions. [2022-01-18 07:02:20,839 INFO L78 Accepts]: Start accepts. Automaton has 3607 states and 13047 transitions. Word has length 26 [2022-01-18 07:02:20,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 07:02:20,839 INFO L470 AbstractCegarLoop]: Abstraction has 3607 states and 13047 transitions. [2022-01-18 07:02:20,839 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.5185185185185186) internal successors, (68), 27 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 07:02:20,839 INFO L276 IsEmpty]: Start isEmpty. Operand 3607 states and 13047 transitions. [2022-01-18 07:02:20,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 07:02:20,844 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 07:02:20,844 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 07:02:20,860 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Forceful destruction successful, exit code 0 [2022-01-18 07:02:21,059 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86,85 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 07:02:21,059 INFO L402 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 07:02:21,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 07:02:21,059 INFO L85 PathProgramCache]: Analyzing trace with hash -742785592, now seen corresponding path program 42 times [2022-01-18 07:02:21,059 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 07:02:21,060 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [227613053] [2022-01-18 07:02:21,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 07:02:21,060 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 07:02:21,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 07:02:21,155 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 07:02:21,155 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 07:02:21,155 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [227613053] [2022-01-18 07:02:21,155 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [227613053] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 07:02:21,155 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [453371743] [2022-01-18 07:02:21,155 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 07:02:21,155 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 07:02:21,155 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 07:02:21,156 INFO L229 MonitoredProcess]: Starting monitored process 86 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 07:02:21,157 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Waiting until timeout for monitored process [2022-01-18 07:02:21,178 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-01-18 07:02:21,178 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 07:02:21,179 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2022-01-18 07:02:21,179 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 07:02:21,517 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 07:02:21,518 INFO L387 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 109 treesize of output 91 [2022-01-18 07:02:22,037 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 07:02:22,037 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 07:02:22,340 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 07:02:22,341 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 07:02:22,351 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 07:02:22,352 INFO L387 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 187 treesize of output 149 [2022-01-18 07:02:22,773 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 07:02:22,773 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [453371743] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 07:02:22,773 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 07:02:22,773 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12, 12] total 29 [2022-01-18 07:02:22,773 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1075756964] [2022-01-18 07:02:22,773 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 07:02:22,774 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-01-18 07:02:22,774 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 07:02:22,774 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-01-18 07:02:22,774 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=661, Unknown=0, NotChecked=0, Total=812 [2022-01-18 07:02:22,774 INFO L87 Difference]: Start difference. First operand 3607 states and 13047 transitions. Second operand has 29 states, 29 states have (on average 2.413793103448276) internal successors, (70), 29 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 07:02:24,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 07:02:24,895 INFO L93 Difference]: Finished difference Result 6448 states and 22082 transitions. [2022-01-18 07:02:24,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-01-18 07:02:24,896 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.413793103448276) internal successors, (70), 29 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-01-18 07:02:24,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 07:02:24,909 INFO L225 Difference]: With dead ends: 6448 [2022-01-18 07:02:24,909 INFO L226 Difference]: Without dead ends: 6418 [2022-01-18 07:02:24,910 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 893 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=685, Invalid=2855, Unknown=0, NotChecked=0, Total=3540 [2022-01-18 07:02:24,910 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 453 mSDsluCounter, 486 mSDsCounter, 0 mSdLazyCounter, 1134 mSolverCounterSat, 99 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 453 SdHoareTripleChecker+Valid, 273 SdHoareTripleChecker+Invalid, 1233 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 99 IncrementalHoareTripleChecker+Valid, 1134 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 07:02:24,910 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [453 Valid, 273 Invalid, 1233 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [99 Valid, 1134 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-18 07:02:24,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6418 states. [2022-01-18 07:02:24,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6418 to 3607. [2022-01-18 07:02:24,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3607 states, 3606 states have (on average 3.6181364392678868) internal successors, (13047), 3606 states have internal predecessors, (13047), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 07:02:24,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3607 states to 3607 states and 13047 transitions. [2022-01-18 07:02:24,998 INFO L78 Accepts]: Start accepts. Automaton has 3607 states and 13047 transitions. Word has length 26 [2022-01-18 07:02:24,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 07:02:24,999 INFO L470 AbstractCegarLoop]: Abstraction has 3607 states and 13047 transitions. [2022-01-18 07:02:24,999 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.413793103448276) internal successors, (70), 29 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 07:02:24,999 INFO L276 IsEmpty]: Start isEmpty. Operand 3607 states and 13047 transitions. [2022-01-18 07:02:25,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 07:02:25,007 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 07:02:25,007 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 07:02:25,029 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Ended with exit code 0 [2022-01-18 07:02:25,214 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 86 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable87 [2022-01-18 07:02:25,214 INFO L402 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 07:02:25,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 07:02:25,214 INFO L85 PathProgramCache]: Analyzing trace with hash -444012144, now seen corresponding path program 43 times [2022-01-18 07:02:25,214 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 07:02:25,214 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [391542141] [2022-01-18 07:02:25,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 07:02:25,214 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 07:02:25,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 07:02:25,337 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 07:02:25,337 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 07:02:25,337 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [391542141] [2022-01-18 07:02:25,337 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [391542141] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 07:02:25,337 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1961137864] [2022-01-18 07:02:25,338 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 07:02:25,338 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 07:02:25,338 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 07:02:25,338 INFO L229 MonitoredProcess]: Starting monitored process 87 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 07:02:25,351 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Waiting until timeout for monitored process [2022-01-18 07:02:25,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 07:02:25,361 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2022-01-18 07:02:25,362 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 07:02:25,642 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 07:02:25,643 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 07:02:25,643 INFO L387 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 109 treesize of output 75 [2022-01-18 07:02:25,726 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 07:02:25,726 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 07:02:26,077 INFO L353 Elim1Store]: treesize reduction 10, result has 81.8 percent of original size [2022-01-18 07:02:26,077 INFO L387 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 199 treesize of output 157 [2022-01-18 07:02:27,556 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 07:02:27,556 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1961137864] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 07:02:27,556 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 07:02:27,556 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 26 [2022-01-18 07:02:27,556 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1048899255] [2022-01-18 07:02:27,556 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 07:02:27,557 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-18 07:02:27,557 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 07:02:27,583 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-18 07:02:27,583 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=539, Unknown=0, NotChecked=0, Total=650 [2022-01-18 07:02:27,583 INFO L87 Difference]: Start difference. First operand 3607 states and 13047 transitions. Second operand has 26 states, 26 states have (on average 2.5384615384615383) internal successors, (66), 26 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) [2022-01-18 07:02:29,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 07:02:29,657 INFO L93 Difference]: Finished difference Result 5997 states and 20454 transitions. [2022-01-18 07:02:29,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-01-18 07:02:29,657 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.5384615384615383) internal successors, (66), 26 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 26 [2022-01-18 07:02:29,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 07:02:29,667 INFO L225 Difference]: With dead ends: 5997 [2022-01-18 07:02:29,667 INFO L226 Difference]: Without dead ends: 5892 [2022-01-18 07:02:29,667 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 972 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=538, Invalid=2884, Unknown=0, NotChecked=0, Total=3422 [2022-01-18 07:02:29,668 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 267 mSDsluCounter, 458 mSDsCounter, 0 mSdLazyCounter, 914 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 267 SdHoareTripleChecker+Valid, 260 SdHoareTripleChecker+Invalid, 1017 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 914 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 67 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 07:02:29,668 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [267 Valid, 260 Invalid, 1017 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 914 Invalid, 0 Unknown, 67 Unchecked, 0.4s Time] [2022-01-18 07:02:29,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5892 states. [2022-01-18 07:02:29,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5892 to 3618. [2022-01-18 07:02:29,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3618 states, 3617 states have (on average 3.613491844069671) internal successors, (13070), 3617 states have internal predecessors, (13070), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 07:02:29,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3618 states to 3618 states and 13070 transitions. [2022-01-18 07:02:29,777 INFO L78 Accepts]: Start accepts. Automaton has 3618 states and 13070 transitions. Word has length 26 [2022-01-18 07:02:29,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 07:02:29,777 INFO L470 AbstractCegarLoop]: Abstraction has 3618 states and 13070 transitions. [2022-01-18 07:02:29,777 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.5384615384615383) internal successors, (66), 26 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) [2022-01-18 07:02:29,777 INFO L276 IsEmpty]: Start isEmpty. Operand 3618 states and 13070 transitions. [2022-01-18 07:02:29,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 07:02:29,782 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 07:02:29,782 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 07:02:29,798 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Forceful destruction successful, exit code 0 [2022-01-18 07:02:29,990 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88,87 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 07:02:29,990 INFO L402 AbstractCegarLoop]: === Iteration 90 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 07:02:29,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 07:02:29,993 INFO L85 PathProgramCache]: Analyzing trace with hash 1900543888, now seen corresponding path program 44 times [2022-01-18 07:02:29,993 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 07:02:29,993 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [431119678] [2022-01-18 07:02:29,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 07:02:29,993 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 07:02:29,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 07:02:30,130 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 07:02:30,130 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 07:02:30,130 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [431119678] [2022-01-18 07:02:30,130 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [431119678] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 07:02:30,130 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [166275809] [2022-01-18 07:02:30,130 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 07:02:30,130 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 07:02:30,130 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 07:02:30,131 INFO L229 MonitoredProcess]: Starting monitored process 88 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 07:02:30,132 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Waiting until timeout for monitored process [2022-01-18 07:02:30,152 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 07:02:30,153 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 07:02:30,153 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2022-01-18 07:02:30,153 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 07:02:30,487 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 07:02:30,494 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 07:02:30,494 INFO L387 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 109 treesize of output 91 [2022-01-18 07:02:30,987 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 07:02:30,987 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 07:02:32,104 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 07:02:32,104 INFO L387 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 179 treesize of output 165 [2022-01-18 07:02:34,783 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 07:02:34,783 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [166275809] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 07:02:34,783 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 07:02:34,783 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-01-18 07:02:34,783 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [46888206] [2022-01-18 07:02:34,783 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 07:02:34,783 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-18 07:02:34,784 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 07:02:34,784 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-18 07:02:34,784 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=483, Unknown=0, NotChecked=0, Total=600 [2022-01-18 07:02:34,784 INFO L87 Difference]: Start difference. First operand 3618 states and 13070 transitions. Second operand has 25 states, 25 states have (on average 2.52) internal successors, (63), 25 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) [2022-01-18 07:02:36,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 07:02:36,529 INFO L93 Difference]: Finished difference Result 5423 states and 18644 transitions. [2022-01-18 07:02:36,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-01-18 07:02:36,530 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.52) internal successors, (63), 25 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 26 [2022-01-18 07:02:36,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 07:02:36,539 INFO L225 Difference]: With dead ends: 5423 [2022-01-18 07:02:36,539 INFO L226 Difference]: Without dead ends: 5363 [2022-01-18 07:02:36,539 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 37 SyntacticMatches, 3 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 621 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=418, Invalid=1652, Unknown=0, NotChecked=0, Total=2070 [2022-01-18 07:02:36,539 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 252 mSDsluCounter, 318 mSDsCounter, 0 mSdLazyCounter, 478 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 252 SdHoareTripleChecker+Valid, 202 SdHoareTripleChecker+Invalid, 746 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 478 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 231 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 07:02:36,540 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [252 Valid, 202 Invalid, 746 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 478 Invalid, 0 Unknown, 231 Unchecked, 0.3s Time] [2022-01-18 07:02:36,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5363 states. [2022-01-18 07:02:36,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5363 to 3672. [2022-01-18 07:02:36,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3672 states, 3671 states have (on average 3.6126396077363117) internal successors, (13262), 3671 states have internal predecessors, (13262), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 07:02:36,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3672 states to 3672 states and 13262 transitions. [2022-01-18 07:02:36,598 INFO L78 Accepts]: Start accepts. Automaton has 3672 states and 13262 transitions. Word has length 26 [2022-01-18 07:02:36,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 07:02:36,599 INFO L470 AbstractCegarLoop]: Abstraction has 3672 states and 13262 transitions. [2022-01-18 07:02:36,599 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.52) internal successors, (63), 25 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) [2022-01-18 07:02:36,599 INFO L276 IsEmpty]: Start isEmpty. Operand 3672 states and 13262 transitions. [2022-01-18 07:02:36,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 07:02:36,604 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 07:02:36,604 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 07:02:36,621 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Forceful destruction successful, exit code 0 [2022-01-18 07:02:36,819 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89,88 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 07:02:36,819 INFO L402 AbstractCegarLoop]: === Iteration 91 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 07:02:36,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 07:02:36,819 INFO L85 PathProgramCache]: Analyzing trace with hash -861293324, now seen corresponding path program 45 times [2022-01-18 07:02:36,819 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 07:02:36,819 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1442481412] [2022-01-18 07:02:36,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 07:02:36,820 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 07:02:36,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 07:02:36,988 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 07:02:36,988 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 07:02:36,988 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1442481412] [2022-01-18 07:02:36,988 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1442481412] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 07:02:36,988 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2083899797] [2022-01-18 07:02:36,988 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 07:02:36,988 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 07:02:36,989 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 07:02:36,989 INFO L229 MonitoredProcess]: Starting monitored process 89 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 07:02:36,990 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Waiting until timeout for monitored process [2022-01-18 07:02:37,011 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 07:02:37,011 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 07:02:37,012 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2022-01-18 07:02:37,012 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 07:02:37,406 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 07:02:37,412 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 07:02:37,412 INFO L387 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 108 treesize of output 90 [2022-01-18 07:02:37,913 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 07:02:37,913 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 07:02:38,625 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 07:02:38,625 INFO L387 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 179 treesize of output 165 [2022-01-18 07:02:43,436 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 07:02:43,436 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2083899797] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 07:02:43,436 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 07:02:43,436 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 22 [2022-01-18 07:02:43,436 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [490558012] [2022-01-18 07:02:43,436 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 07:02:43,436 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 07:02:43,436 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 07:02:43,437 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 07:02:43,437 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=367, Unknown=0, NotChecked=0, Total=462 [2022-01-18 07:02:43,437 INFO L87 Difference]: Start difference. First operand 3672 states and 13262 transitions. Second operand has 22 states, 22 states have (on average 2.6363636363636362) internal successors, (58), 22 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) [2022-01-18 07:02:44,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 07:02:44,632 INFO L93 Difference]: Finished difference Result 5404 states and 18648 transitions. [2022-01-18 07:02:44,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-01-18 07:02:44,632 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.6363636363636362) internal successors, (58), 22 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 26 [2022-01-18 07:02:44,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 07:02:44,643 INFO L225 Difference]: With dead ends: 5404 [2022-01-18 07:02:44,643 INFO L226 Difference]: Without dead ends: 5374 [2022-01-18 07:02:44,643 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 37 SyntacticMatches, 6 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 505 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=370, Invalid=1436, Unknown=0, NotChecked=0, Total=1806 [2022-01-18 07:02:44,643 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 211 mSDsluCounter, 247 mSDsCounter, 0 mSdLazyCounter, 377 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 211 SdHoareTripleChecker+Valid, 156 SdHoareTripleChecker+Invalid, 611 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 377 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 200 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 07:02:44,643 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [211 Valid, 156 Invalid, 611 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 377 Invalid, 0 Unknown, 200 Unchecked, 0.2s Time] [2022-01-18 07:02:44,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5374 states. [2022-01-18 07:02:44,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5374 to 3679. [2022-01-18 07:02:44,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3679 states, 3678 states have (on average 3.613920609026645) internal successors, (13292), 3678 states have internal predecessors, (13292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 07:02:44,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3679 states to 3679 states and 13292 transitions. [2022-01-18 07:02:44,709 INFO L78 Accepts]: Start accepts. Automaton has 3679 states and 13292 transitions. Word has length 26 [2022-01-18 07:02:44,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 07:02:44,709 INFO L470 AbstractCegarLoop]: Abstraction has 3679 states and 13292 transitions. [2022-01-18 07:02:44,709 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.6363636363636362) internal successors, (58), 22 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) [2022-01-18 07:02:44,709 INFO L276 IsEmpty]: Start isEmpty. Operand 3679 states and 13292 transitions. [2022-01-18 07:02:44,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 07:02:44,714 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 07:02:44,714 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 07:02:44,729 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Forceful destruction successful, exit code 0 [2022-01-18 07:02:44,927 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,89 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 07:02:44,927 INFO L402 AbstractCegarLoop]: === Iteration 92 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 07:02:44,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 07:02:44,928 INFO L85 PathProgramCache]: Analyzing trace with hash 1450992676, now seen corresponding path program 46 times [2022-01-18 07:02:44,928 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 07:02:44,928 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1565947458] [2022-01-18 07:02:44,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 07:02:44,928 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 07:02:44,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 07:02:45,115 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 07:02:45,116 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 07:02:45,116 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1565947458] [2022-01-18 07:02:45,116 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1565947458] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 07:02:45,116 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [323651720] [2022-01-18 07:02:45,116 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 07:02:45,116 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 07:02:45,116 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 07:02:45,117 INFO L229 MonitoredProcess]: Starting monitored process 90 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 07:02:45,118 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Waiting until timeout for monitored process [2022-01-18 07:02:45,139 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 07:02:45,139 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 07:02:45,140 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2022-01-18 07:02:45,140 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 07:02:45,566 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 07:02:45,567 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 07:02:45,567 INFO L387 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 109 treesize of output 75 [2022-01-18 07:02:45,653 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 07:02:45,653 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 07:02:46,019 INFO L353 Elim1Store]: treesize reduction 10, result has 81.8 percent of original size [2022-01-18 07:02:46,020 INFO L387 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 199 treesize of output 157 [2022-01-18 07:02:48,441 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 07:02:48,441 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [323651720] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 07:02:48,441 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 07:02:48,441 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 26 [2022-01-18 07:02:48,441 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [53615937] [2022-01-18 07:02:48,441 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 07:02:48,441 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-18 07:02:48,441 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 07:02:48,442 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-18 07:02:48,442 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=544, Unknown=0, NotChecked=0, Total=650 [2022-01-18 07:02:48,443 INFO L87 Difference]: Start difference. First operand 3679 states and 13292 transitions. Second operand has 26 states, 26 states have (on average 2.5384615384615383) internal successors, (66), 26 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) [2022-01-18 07:02:50,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 07:02:50,898 INFO L93 Difference]: Finished difference Result 6247 states and 21380 transitions. [2022-01-18 07:02:50,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-01-18 07:02:50,898 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.5384615384615383) internal successors, (66), 26 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 26 [2022-01-18 07:02:50,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 07:02:50,908 INFO L225 Difference]: With dead ends: 6247 [2022-01-18 07:02:50,908 INFO L226 Difference]: Without dead ends: 6232 [2022-01-18 07:02:50,909 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 950 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=579, Invalid=3081, Unknown=0, NotChecked=0, Total=3660 [2022-01-18 07:02:50,909 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 231 mSDsluCounter, 464 mSDsCounter, 0 mSdLazyCounter, 1168 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 231 SdHoareTripleChecker+Valid, 292 SdHoareTripleChecker+Invalid, 1281 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 1168 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 75 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 07:02:50,909 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [231 Valid, 292 Invalid, 1281 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 1168 Invalid, 0 Unknown, 75 Unchecked, 0.6s Time] [2022-01-18 07:02:50,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6232 states. [2022-01-18 07:02:50,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6232 to 3670. [2022-01-18 07:02:50,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3670 states, 3669 states have (on average 3.612701008449169) internal successors, (13255), 3669 states have internal predecessors, (13255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 07:02:50,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3670 states to 3670 states and 13255 transitions. [2022-01-18 07:02:50,972 INFO L78 Accepts]: Start accepts. Automaton has 3670 states and 13255 transitions. Word has length 26 [2022-01-18 07:02:50,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 07:02:50,972 INFO L470 AbstractCegarLoop]: Abstraction has 3670 states and 13255 transitions. [2022-01-18 07:02:50,972 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.5384615384615383) internal successors, (66), 26 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) [2022-01-18 07:02:50,972 INFO L276 IsEmpty]: Start isEmpty. Operand 3670 states and 13255 transitions. [2022-01-18 07:02:50,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 07:02:50,977 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 07:02:50,977 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 07:02:50,992 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Ended with exit code 0 [2022-01-18 07:02:51,179 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,SelfDestructingSolverStorable91 [2022-01-18 07:02:51,180 INFO L402 AbstractCegarLoop]: === Iteration 93 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 07:02:51,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 07:02:51,180 INFO L85 PathProgramCache]: Analyzing trace with hash -1595082124, now seen corresponding path program 47 times [2022-01-18 07:02:51,180 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 07:02:51,180 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [131364425] [2022-01-18 07:02:51,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 07:02:51,180 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 07:02:51,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 07:02:51,343 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 07:02:51,344 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 07:02:51,344 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [131364425] [2022-01-18 07:02:51,344 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [131364425] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 07:02:51,344 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [751410057] [2022-01-18 07:02:51,344 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 07:02:51,344 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 07:02:51,344 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 07:02:51,345 INFO L229 MonitoredProcess]: Starting monitored process 91 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 07:02:51,346 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Waiting until timeout for monitored process [2022-01-18 07:02:51,366 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 07:02:51,367 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 07:02:51,367 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2022-01-18 07:02:51,368 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 07:02:51,732 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 07:02:51,733 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 07:02:51,733 INFO L387 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 109 treesize of output 75 [2022-01-18 07:02:51,811 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 07:02:51,811 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 07:02:52,033 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 07:02:52,050 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 07:02:52,050 INFO L387 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 191 treesize of output 161 [2022-01-18 07:02:54,910 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 07:02:54,910 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [751410057] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 07:02:54,910 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 07:02:54,911 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 26 [2022-01-18 07:02:54,911 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [859981659] [2022-01-18 07:02:54,911 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 07:02:54,911 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-18 07:02:54,911 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 07:02:54,911 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-18 07:02:54,911 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=535, Unknown=0, NotChecked=0, Total=650 [2022-01-18 07:02:54,911 INFO L87 Difference]: Start difference. First operand 3670 states and 13255 transitions. Second operand has 26 states, 26 states have (on average 2.3846153846153846) internal successors, (62), 26 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 07:02:57,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 07:02:57,052 INFO L93 Difference]: Finished difference Result 6035 states and 20685 transitions. [2022-01-18 07:02:57,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-01-18 07:02:57,052 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.3846153846153846) internal successors, (62), 26 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 26 [2022-01-18 07:02:57,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 07:02:57,062 INFO L225 Difference]: With dead ends: 6035 [2022-01-18 07:02:57,062 INFO L226 Difference]: Without dead ends: 6005 [2022-01-18 07:02:57,063 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 35 SyntacticMatches, 2 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1326 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=593, Invalid=3567, Unknown=0, NotChecked=0, Total=4160 [2022-01-18 07:02:57,063 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 252 mSDsluCounter, 678 mSDsCounter, 0 mSdLazyCounter, 1093 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 252 SdHoareTripleChecker+Valid, 369 SdHoareTripleChecker+Invalid, 1613 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 1093 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 474 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 07:02:57,063 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [252 Valid, 369 Invalid, 1613 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 1093 Invalid, 0 Unknown, 474 Unchecked, 0.5s Time] [2022-01-18 07:02:57,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6005 states. [2022-01-18 07:02:57,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6005 to 3702. [2022-01-18 07:02:57,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3702 states, 3701 states have (on average 3.6101053769251554) internal successors, (13361), 3701 states have internal predecessors, (13361), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 07:02:57,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3702 states to 3702 states and 13361 transitions. [2022-01-18 07:02:57,128 INFO L78 Accepts]: Start accepts. Automaton has 3702 states and 13361 transitions. Word has length 26 [2022-01-18 07:02:57,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 07:02:57,128 INFO L470 AbstractCegarLoop]: Abstraction has 3702 states and 13361 transitions. [2022-01-18 07:02:57,128 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.3846153846153846) internal successors, (62), 26 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 07:02:57,128 INFO L276 IsEmpty]: Start isEmpty. Operand 3702 states and 13361 transitions. [2022-01-18 07:02:57,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 07:02:57,133 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 07:02:57,133 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 07:02:57,153 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Forceful destruction successful, exit code 0 [2022-01-18 07:02:57,348 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,91 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 07:02:57,349 INFO L402 AbstractCegarLoop]: === Iteration 94 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 07:02:57,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 07:02:57,349 INFO L85 PathProgramCache]: Analyzing trace with hash 1082352392, now seen corresponding path program 48 times [2022-01-18 07:02:57,349 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 07:02:57,349 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1060107749] [2022-01-18 07:02:57,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 07:02:57,349 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 07:02:57,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 07:02:57,648 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 07:02:57,648 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 07:02:57,648 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1060107749] [2022-01-18 07:02:57,648 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1060107749] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 07:02:57,648 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1003534768] [2022-01-18 07:02:57,648 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 07:02:57,648 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 07:02:57,648 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 07:02:57,652 INFO L229 MonitoredProcess]: Starting monitored process 92 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 07:02:57,653 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Waiting until timeout for monitored process [2022-01-18 07:02:57,674 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 07:02:57,674 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 07:02:57,675 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2022-01-18 07:02:57,675 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 07:02:58,167 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 07:02:58,174 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 07:02:58,175 INFO L387 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 109 treesize of output 91 [2022-01-18 07:02:58,724 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 07:02:58,725 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 07:02:59,169 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 07:02:59,170 INFO L387 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 171 treesize of output 161 [2022-01-18 07:03:20,362 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 07:03:20,362 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1003534768] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 07:03:20,362 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 07:03:20,362 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 23 [2022-01-18 07:03:20,362 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1416348551] [2022-01-18 07:03:20,362 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 07:03:20,362 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-18 07:03:20,362 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 07:03:20,362 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-18 07:03:20,363 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=398, Unknown=0, NotChecked=0, Total=506 [2022-01-18 07:03:20,363 INFO L87 Difference]: Start difference. First operand 3702 states and 13361 transitions. Second operand has 23 states, 23 states have (on average 2.608695652173913) internal successors, (60), 23 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 07:03:22,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 07:03:22,301 INFO L93 Difference]: Finished difference Result 5491 states and 19106 transitions. [2022-01-18 07:03:22,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-01-18 07:03:22,301 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.608695652173913) internal successors, (60), 23 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 26 [2022-01-18 07:03:22,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 07:03:22,311 INFO L225 Difference]: With dead ends: 5491 [2022-01-18 07:03:22,311 INFO L226 Difference]: Without dead ends: 5461 [2022-01-18 07:03:22,311 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 40 SyntacticMatches, 5 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 745 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=500, Invalid=1950, Unknown=0, NotChecked=0, Total=2450 [2022-01-18 07:03:22,311 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 197 mSDsluCounter, 280 mSDsCounter, 0 mSdLazyCounter, 426 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 197 SdHoareTripleChecker+Valid, 150 SdHoareTripleChecker+Invalid, 831 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 426 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 362 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 07:03:22,312 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [197 Valid, 150 Invalid, 831 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 426 Invalid, 0 Unknown, 362 Unchecked, 0.3s Time] [2022-01-18 07:03:22,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5461 states. [2022-01-18 07:03:22,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5461 to 3716. [2022-01-18 07:03:22,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3716 states, 3715 states have (on average 3.6134589502018843) internal successors, (13424), 3715 states have internal predecessors, (13424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 07:03:22,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3716 states to 3716 states and 13424 transitions. [2022-01-18 07:03:22,370 INFO L78 Accepts]: Start accepts. Automaton has 3716 states and 13424 transitions. Word has length 26 [2022-01-18 07:03:22,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 07:03:22,370 INFO L470 AbstractCegarLoop]: Abstraction has 3716 states and 13424 transitions. [2022-01-18 07:03:22,370 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.608695652173913) internal successors, (60), 23 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 07:03:22,370 INFO L276 IsEmpty]: Start isEmpty. Operand 3716 states and 13424 transitions. [2022-01-18 07:03:22,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 07:03:22,375 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 07:03:22,375 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 07:03:22,420 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Forceful destruction successful, exit code 0 [2022-01-18 07:03:22,620 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93,92 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 07:03:22,620 INFO L402 AbstractCegarLoop]: === Iteration 95 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 07:03:22,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 07:03:22,624 INFO L85 PathProgramCache]: Analyzing trace with hash -1165066902, now seen corresponding path program 49 times [2022-01-18 07:03:22,624 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 07:03:22,624 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1745351977] [2022-01-18 07:03:22,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 07:03:22,624 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 07:03:22,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 07:03:22,839 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 07:03:22,839 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 07:03:22,839 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1745351977] [2022-01-18 07:03:22,839 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1745351977] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 07:03:22,839 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1279662973] [2022-01-18 07:03:22,839 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 07:03:22,840 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 07:03:22,840 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 07:03:22,841 INFO L229 MonitoredProcess]: Starting monitored process 93 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 07:03:22,842 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Waiting until timeout for monitored process [2022-01-18 07:03:22,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 07:03:22,866 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2022-01-18 07:03:22,866 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 07:03:23,217 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 07:03:23,222 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 07:03:23,222 INFO L387 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 109 treesize of output 83 [2022-01-18 07:03:23,612 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 07:03:23,612 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 07:03:23,884 INFO L353 Elim1Store]: treesize reduction 10, result has 81.8 percent of original size [2022-01-18 07:03:23,884 INFO L387 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 187 treesize of output 157 [2022-01-18 07:03:26,072 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 07:03:26,072 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1279662973] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 07:03:26,072 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 07:03:26,072 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 21 [2022-01-18 07:03:26,073 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [243107549] [2022-01-18 07:03:26,073 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 07:03:26,073 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 07:03:26,073 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 07:03:26,073 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 07:03:26,073 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=329, Unknown=0, NotChecked=0, Total=420 [2022-01-18 07:03:26,073 INFO L87 Difference]: Start difference. First operand 3716 states and 13424 transitions. Second operand has 21 states, 21 states have (on average 2.619047619047619) internal successors, (55), 21 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 07:03:26,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 07:03:26,654 INFO L93 Difference]: Finished difference Result 4995 states and 17213 transitions. [2022-01-18 07:03:26,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-01-18 07:03:26,654 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.619047619047619) internal successors, (55), 21 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-01-18 07:03:26,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 07:03:26,664 INFO L225 Difference]: With dead ends: 4995 [2022-01-18 07:03:26,664 INFO L226 Difference]: Without dead ends: 4965 [2022-01-18 07:03:26,664 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 36 SyntacticMatches, 5 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 281 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=145, Invalid=667, Unknown=0, NotChecked=0, Total=812 [2022-01-18 07:03:26,664 INFO L933 BasicCegarLoop]: 47 mSDtfsCounter, 127 mSDsluCounter, 478 mSDsCounter, 0 mSdLazyCounter, 650 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 127 SdHoareTripleChecker+Valid, 330 SdHoareTripleChecker+Invalid, 757 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 650 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 95 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 07:03:26,665 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [127 Valid, 330 Invalid, 757 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 650 Invalid, 0 Unknown, 95 Unchecked, 0.3s Time] [2022-01-18 07:03:26,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4965 states. [2022-01-18 07:03:26,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4965 to 3720. [2022-01-18 07:03:26,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3720 states, 3719 states have (on average 3.611185802635117) internal successors, (13430), 3719 states have internal predecessors, (13430), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 07:03:26,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3720 states to 3720 states and 13430 transitions. [2022-01-18 07:03:26,732 INFO L78 Accepts]: Start accepts. Automaton has 3720 states and 13430 transitions. Word has length 26 [2022-01-18 07:03:26,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 07:03:26,732 INFO L470 AbstractCegarLoop]: Abstraction has 3720 states and 13430 transitions. [2022-01-18 07:03:26,732 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.619047619047619) internal successors, (55), 21 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 07:03:26,732 INFO L276 IsEmpty]: Start isEmpty. Operand 3720 states and 13430 transitions. [2022-01-18 07:03:26,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 07:03:26,738 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 07:03:26,738 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 07:03:26,754 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Ended with exit code 0 [2022-01-18 07:03:26,947 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94,93 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 07:03:26,947 INFO L402 AbstractCegarLoop]: === Iteration 96 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 07:03:26,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 07:03:26,948 INFO L85 PathProgramCache]: Analyzing trace with hash -607590512, now seen corresponding path program 50 times [2022-01-18 07:03:26,948 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 07:03:26,948 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1893691629] [2022-01-18 07:03:26,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 07:03:26,948 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 07:03:26,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 07:03:27,114 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 07:03:27,114 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 07:03:27,114 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1893691629] [2022-01-18 07:03:27,115 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1893691629] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 07:03:27,115 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1314061308] [2022-01-18 07:03:27,115 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 07:03:27,115 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 07:03:27,115 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 07:03:27,116 INFO L229 MonitoredProcess]: Starting monitored process 94 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 07:03:27,116 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Waiting until timeout for monitored process [2022-01-18 07:03:27,142 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 07:03:27,142 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 07:03:27,142 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2022-01-18 07:03:27,143 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 07:03:27,464 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 07:03:27,469 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 07:03:27,469 INFO L387 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 109 treesize of output 83 [2022-01-18 07:03:27,844 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 07:03:27,844 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 07:03:28,174 INFO L353 Elim1Store]: treesize reduction 10, result has 81.8 percent of original size [2022-01-18 07:03:28,174 INFO L387 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 199 treesize of output 157 [2022-01-18 07:03:31,493 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 07:03:31,493 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1314061308] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 07:03:31,493 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 07:03:31,493 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 26 [2022-01-18 07:03:31,493 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [794293659] [2022-01-18 07:03:31,493 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 07:03:31,494 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-18 07:03:31,494 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 07:03:31,496 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-18 07:03:31,496 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=527, Unknown=0, NotChecked=0, Total=650 [2022-01-18 07:03:31,496 INFO L87 Difference]: Start difference. First operand 3720 states and 13430 transitions. Second operand has 26 states, 26 states have (on average 2.576923076923077) internal successors, (67), 26 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) [2022-01-18 07:03:34,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 07:03:34,415 INFO L93 Difference]: Finished difference Result 6225 states and 21280 transitions. [2022-01-18 07:03:34,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-01-18 07:03:34,415 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.576923076923077) internal successors, (67), 26 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 26 [2022-01-18 07:03:34,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 07:03:34,426 INFO L225 Difference]: With dead ends: 6225 [2022-01-18 07:03:34,427 INFO L226 Difference]: Without dead ends: 6185 [2022-01-18 07:03:34,427 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 989 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=615, Invalid=3167, Unknown=0, NotChecked=0, Total=3782 [2022-01-18 07:03:34,427 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 248 mSDsluCounter, 491 mSDsCounter, 0 mSdLazyCounter, 1327 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 248 SdHoareTripleChecker+Valid, 295 SdHoareTripleChecker+Invalid, 1374 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 1327 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-18 07:03:34,427 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [248 Valid, 295 Invalid, 1374 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 1327 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-18 07:03:34,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6185 states. [2022-01-18 07:03:34,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6185 to 3729. [2022-01-18 07:03:34,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3729 states, 3728 states have (on average 3.612392703862661) internal successors, (13467), 3728 states have internal predecessors, (13467), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 07:03:34,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3729 states to 3729 states and 13467 transitions. [2022-01-18 07:03:34,496 INFO L78 Accepts]: Start accepts. Automaton has 3729 states and 13467 transitions. Word has length 26 [2022-01-18 07:03:34,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 07:03:34,496 INFO L470 AbstractCegarLoop]: Abstraction has 3729 states and 13467 transitions. [2022-01-18 07:03:34,497 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.576923076923077) internal successors, (67), 26 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) [2022-01-18 07:03:34,497 INFO L276 IsEmpty]: Start isEmpty. Operand 3729 states and 13467 transitions. [2022-01-18 07:03:34,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 07:03:34,502 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 07:03:34,502 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 07:03:34,518 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Ended with exit code 0 [2022-01-18 07:03:34,708 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95,94 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 07:03:34,708 INFO L402 AbstractCegarLoop]: === Iteration 97 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 07:03:34,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 07:03:34,708 INFO L85 PathProgramCache]: Analyzing trace with hash 1876950220, now seen corresponding path program 51 times [2022-01-18 07:03:34,708 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 07:03:34,709 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1070580911] [2022-01-18 07:03:34,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 07:03:34,709 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 07:03:34,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 07:03:34,975 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 07:03:34,976 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 07:03:34,976 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1070580911] [2022-01-18 07:03:34,976 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1070580911] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 07:03:34,976 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1212726469] [2022-01-18 07:03:34,976 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 07:03:34,976 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 07:03:34,976 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 07:03:34,977 INFO L229 MonitoredProcess]: Starting monitored process 95 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 07:03:34,977 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (95)] Waiting until timeout for monitored process [2022-01-18 07:03:35,000 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 07:03:35,000 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 07:03:35,000 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2022-01-18 07:03:35,001 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 07:03:35,404 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 07:03:35,410 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 07:03:35,410 INFO L387 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 109 treesize of output 91 [2022-01-18 07:03:36,051 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 07:03:36,051 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 07:03:36,647 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 07:03:36,648 INFO L387 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 207 treesize of output 181 [2022-01-18 07:03:52,391 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 07:03:52,392 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1212726469] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 07:03:52,392 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 07:03:52,392 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 23 [2022-01-18 07:03:52,392 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [100083819] [2022-01-18 07:03:52,392 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 07:03:52,392 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-18 07:03:52,392 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 07:03:52,392 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-18 07:03:52,392 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=405, Unknown=0, NotChecked=0, Total=506 [2022-01-18 07:03:52,392 INFO L87 Difference]: Start difference. First operand 3729 states and 13467 transitions. Second operand has 23 states, 23 states have (on average 2.5652173913043477) internal successors, (59), 23 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 07:03:53,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 07:03:53,450 INFO L93 Difference]: Finished difference Result 5411 states and 18731 transitions. [2022-01-18 07:03:53,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-01-18 07:03:53,450 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.5652173913043477) internal successors, (59), 23 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 26 [2022-01-18 07:03:53,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 07:03:53,459 INFO L225 Difference]: With dead ends: 5411 [2022-01-18 07:03:53,459 INFO L226 Difference]: Without dead ends: 5351 [2022-01-18 07:03:53,460 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 43 SyntacticMatches, 5 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 528 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=353, Invalid=1453, Unknown=0, NotChecked=0, Total=1806 [2022-01-18 07:03:53,460 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 184 mSDsluCounter, 228 mSDsCounter, 0 mSdLazyCounter, 296 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 184 SdHoareTripleChecker+Valid, 138 SdHoareTripleChecker+Invalid, 664 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 296 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 348 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 07:03:53,460 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [184 Valid, 138 Invalid, 664 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 296 Invalid, 0 Unknown, 348 Unchecked, 0.2s Time] [2022-01-18 07:03:53,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5351 states. [2022-01-18 07:03:53,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5351 to 3755. [2022-01-18 07:03:53,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3755 states, 3754 states have (on average 3.6164091635588704) internal successors, (13576), 3754 states have internal predecessors, (13576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 07:03:53,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3755 states to 3755 states and 13576 transitions. [2022-01-18 07:03:53,520 INFO L78 Accepts]: Start accepts. Automaton has 3755 states and 13576 transitions. Word has length 26 [2022-01-18 07:03:53,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 07:03:53,520 INFO L470 AbstractCegarLoop]: Abstraction has 3755 states and 13576 transitions. [2022-01-18 07:03:53,520 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.5652173913043477) internal successors, (59), 23 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 07:03:53,520 INFO L276 IsEmpty]: Start isEmpty. Operand 3755 states and 13576 transitions. [2022-01-18 07:03:53,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 07:03:53,525 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 07:03:53,525 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 07:03:53,541 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (95)] Forceful destruction successful, exit code 0 [2022-01-18 07:03:53,729 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,SelfDestructingSolverStorable96 [2022-01-18 07:03:53,730 INFO L402 AbstractCegarLoop]: === Iteration 98 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 07:03:53,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 07:03:53,730 INFO L85 PathProgramCache]: Analyzing trace with hash -370469074, now seen corresponding path program 52 times [2022-01-18 07:03:53,730 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 07:03:53,730 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1897212402] [2022-01-18 07:03:53,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 07:03:53,732 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 07:03:53,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 07:03:53,982 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 07:03:53,982 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 07:03:53,982 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1897212402] [2022-01-18 07:03:53,982 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1897212402] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 07:03:53,982 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [669176555] [2022-01-18 07:03:53,982 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 07:03:53,982 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 07:03:53,982 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 07:03:53,983 INFO L229 MonitoredProcess]: Starting monitored process 96 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 07:03:53,984 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (96)] Waiting until timeout for monitored process [2022-01-18 07:03:54,008 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 07:03:54,008 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 07:03:54,008 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2022-01-18 07:03:54,009 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 07:03:54,371 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 07:03:54,375 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 07:03:54,376 INFO L387 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 109 treesize of output 83 [2022-01-18 07:03:54,757 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 07:03:54,757 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 07:03:55,070 INFO L353 Elim1Store]: treesize reduction 10, result has 81.8 percent of original size [2022-01-18 07:03:55,072 INFO L387 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 199 treesize of output 157 [2022-01-18 07:03:59,665 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 07:03:59,666 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [669176555] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 07:03:59,666 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 07:03:59,666 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 26 [2022-01-18 07:03:59,666 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [669478771] [2022-01-18 07:03:59,666 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 07:03:59,666 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-18 07:03:59,666 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 07:03:59,667 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-18 07:03:59,667 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=534, Unknown=0, NotChecked=0, Total=650 [2022-01-18 07:03:59,667 INFO L87 Difference]: Start difference. First operand 3755 states and 13576 transitions. Second operand has 26 states, 26 states have (on average 2.576923076923077) internal successors, (67), 26 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) [2022-01-18 07:04:03,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 07:04:03,092 INFO L93 Difference]: Finished difference Result 6364 states and 21737 transitions. [2022-01-18 07:04:03,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-01-18 07:04:03,092 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.576923076923077) internal successors, (67), 26 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 26 [2022-01-18 07:04:03,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 07:04:03,113 INFO L225 Difference]: With dead ends: 6364 [2022-01-18 07:04:03,113 INFO L226 Difference]: Without dead ends: 6334 [2022-01-18 07:04:03,114 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1231 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=715, Invalid=3841, Unknown=0, NotChecked=0, Total=4556 [2022-01-18 07:04:03,114 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 262 mSDsluCounter, 654 mSDsCounter, 0 mSdLazyCounter, 1735 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 262 SdHoareTripleChecker+Valid, 413 SdHoareTripleChecker+Invalid, 1781 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 1735 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-18 07:04:03,114 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [262 Valid, 413 Invalid, 1781 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 1735 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-18 07:04:03,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6334 states. [2022-01-18 07:04:03,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6334 to 3755. [2022-01-18 07:04:03,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3755 states, 3754 states have (on average 3.6164091635588704) internal successors, (13576), 3754 states have internal predecessors, (13576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 07:04:03,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3755 states to 3755 states and 13576 transitions. [2022-01-18 07:04:03,189 INFO L78 Accepts]: Start accepts. Automaton has 3755 states and 13576 transitions. Word has length 26 [2022-01-18 07:04:03,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 07:04:03,189 INFO L470 AbstractCegarLoop]: Abstraction has 3755 states and 13576 transitions. [2022-01-18 07:04:03,189 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.576923076923077) internal successors, (67), 26 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) [2022-01-18 07:04:03,189 INFO L276 IsEmpty]: Start isEmpty. Operand 3755 states and 13576 transitions. [2022-01-18 07:04:03,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 07:04:03,194 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 07:04:03,194 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 07:04:03,232 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (96)] Forceful destruction successful, exit code 0 [2022-01-18 07:04:03,408 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,SelfDestructingSolverStorable97 [2022-01-18 07:04:03,408 INFO L402 AbstractCegarLoop]: === Iteration 99 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 07:04:03,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 07:04:03,408 INFO L85 PathProgramCache]: Analyzing trace with hash 137082914, now seen corresponding path program 44 times [2022-01-18 07:04:03,408 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 07:04:03,409 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1461600680] [2022-01-18 07:04:03,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 07:04:03,409 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 07:04:03,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 07:04:03,657 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 07:04:03,658 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 07:04:03,658 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1461600680] [2022-01-18 07:04:03,658 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1461600680] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 07:04:03,658 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1343619628] [2022-01-18 07:04:03,658 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 07:04:03,658 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 07:04:03,658 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 07:04:03,664 INFO L229 MonitoredProcess]: Starting monitored process 97 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 07:04:03,697 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (97)] Waiting until timeout for monitored process [2022-01-18 07:04:03,706 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 07:04:03,707 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 07:04:03,707 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 30 conjunts are in the unsatisfiable core [2022-01-18 07:04:03,708 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 07:04:04,474 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 07:04:04,482 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 07:04:04,482 INFO L387 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 109 treesize of output 91 [2022-01-18 07:04:05,006 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 07:04:05,006 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 07:04:06,532 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 07:04:06,533 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 07:04:06,540 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 07:04:06,540 INFO L387 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 128 treesize of output 100 [2022-01-18 07:04:06,795 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 07:04:06,795 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1343619628] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 07:04:06,796 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 07:04:06,796 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13, 13] total 29 [2022-01-18 07:04:06,796 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [155569021] [2022-01-18 07:04:06,796 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 07:04:06,811 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-01-18 07:04:06,811 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 07:04:06,811 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-01-18 07:04:06,811 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=741, Unknown=0, NotChecked=0, Total=870 [2022-01-18 07:04:06,811 INFO L87 Difference]: Start difference. First operand 3755 states and 13576 transitions. Second operand has 30 states, 30 states have (on average 2.2333333333333334) internal successors, (67), 29 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) [2022-01-18 07:04:08,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 07:04:08,545 INFO L93 Difference]: Finished difference Result 5191 states and 18089 transitions. [2022-01-18 07:04:08,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-01-18 07:04:08,545 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.2333333333333334) internal successors, (67), 29 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 26 [2022-01-18 07:04:08,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 07:04:08,557 INFO L225 Difference]: With dead ends: 5191 [2022-01-18 07:04:08,558 INFO L226 Difference]: Without dead ends: 5161 [2022-01-18 07:04:08,558 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 35 SyntacticMatches, 6 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1225 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=534, Invalid=3498, Unknown=0, NotChecked=0, Total=4032 [2022-01-18 07:04:08,558 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 198 mSDsluCounter, 748 mSDsCounter, 0 mSdLazyCounter, 497 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 198 SdHoareTripleChecker+Valid, 392 SdHoareTripleChecker+Invalid, 1374 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 497 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 853 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 07:04:08,558 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [198 Valid, 392 Invalid, 1374 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 497 Invalid, 0 Unknown, 853 Unchecked, 0.2s Time] [2022-01-18 07:04:08,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5161 states. [2022-01-18 07:04:08,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5161 to 3755. [2022-01-18 07:04:08,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3755 states, 3754 states have (on average 3.6164091635588704) internal successors, (13576), 3754 states have internal predecessors, (13576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 07:04:08,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3755 states to 3755 states and 13576 transitions. [2022-01-18 07:04:08,624 INFO L78 Accepts]: Start accepts. Automaton has 3755 states and 13576 transitions. Word has length 26 [2022-01-18 07:04:08,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 07:04:08,624 INFO L470 AbstractCegarLoop]: Abstraction has 3755 states and 13576 transitions. [2022-01-18 07:04:08,624 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.2333333333333334) internal successors, (67), 29 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) [2022-01-18 07:04:08,624 INFO L276 IsEmpty]: Start isEmpty. Operand 3755 states and 13576 transitions. [2022-01-18 07:04:08,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 07:04:08,630 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 07:04:08,630 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 07:04:08,646 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (97)] Ended with exit code 0 [2022-01-18 07:04:08,846 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98,97 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 07:04:08,846 INFO L402 AbstractCegarLoop]: === Iteration 100 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 07:04:08,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 07:04:08,846 INFO L85 PathProgramCache]: Analyzing trace with hash 1542258700, now seen corresponding path program 45 times [2022-01-18 07:04:08,846 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 07:04:08,846 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1989263568] [2022-01-18 07:04:08,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 07:04:08,846 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 07:04:08,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 07:04:09,031 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 07:04:09,031 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 07:04:09,031 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1989263568] [2022-01-18 07:04:09,031 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1989263568] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 07:04:09,031 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [461184828] [2022-01-18 07:04:09,031 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 07:04:09,031 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 07:04:09,031 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 07:04:09,032 INFO L229 MonitoredProcess]: Starting monitored process 98 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 07:04:09,033 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (98)] Waiting until timeout for monitored process [2022-01-18 07:04:09,054 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 07:04:09,054 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 07:04:09,054 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-18 07:04:09,055 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 07:04:09,633 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 07:04:09,634 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 07:04:09,634 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 07:04:09,635 INFO L387 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 115 treesize of output 75 [2022-01-18 07:04:09,725 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 07:04:09,725 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 07:04:10,040 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 07:04:10,041 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 07:04:10,041 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 07:04:10,053 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 07:04:10,053 INFO L387 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 215 treesize of output 147 [2022-01-18 07:04:10,437 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 07:04:10,438 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [461184828] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 07:04:10,438 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 07:04:10,438 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 22 [2022-01-18 07:04:10,438 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1896147160] [2022-01-18 07:04:10,438 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 07:04:10,438 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-18 07:04:10,438 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 07:04:10,438 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-18 07:04:10,438 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=418, Unknown=0, NotChecked=0, Total=506 [2022-01-18 07:04:10,438 INFO L87 Difference]: Start difference. First operand 3755 states and 13576 transitions. Second operand has 23 states, 23 states have (on average 2.652173913043478) internal successors, (61), 22 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) [2022-01-18 07:04:12,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 07:04:12,109 INFO L93 Difference]: Finished difference Result 5472 states and 18529 transitions. [2022-01-18 07:04:12,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-01-18 07:04:12,109 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.652173913043478) internal successors, (61), 22 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 26 [2022-01-18 07:04:12,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 07:04:12,119 INFO L225 Difference]: With dead ends: 5472 [2022-01-18 07:04:12,120 INFO L226 Difference]: Without dead ends: 5427 [2022-01-18 07:04:12,120 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 36 SyntacticMatches, 4 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 788 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=498, Invalid=2472, Unknown=0, NotChecked=0, Total=2970 [2022-01-18 07:04:12,120 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 321 mSDsluCounter, 547 mSDsCounter, 0 mSdLazyCounter, 1283 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 321 SdHoareTripleChecker+Valid, 349 SdHoareTripleChecker+Invalid, 1314 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 1283 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 07:04:12,120 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [321 Valid, 349 Invalid, 1314 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 1283 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-18 07:04:12,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5427 states. [2022-01-18 07:04:12,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5427 to 3881. [2022-01-18 07:04:12,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3881 states, 3880 states have (on average 3.622680412371134) internal successors, (14056), 3880 states have internal predecessors, (14056), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 07:04:12,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3881 states to 3881 states and 14056 transitions. [2022-01-18 07:04:12,185 INFO L78 Accepts]: Start accepts. Automaton has 3881 states and 14056 transitions. Word has length 26 [2022-01-18 07:04:12,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 07:04:12,185 INFO L470 AbstractCegarLoop]: Abstraction has 3881 states and 14056 transitions. [2022-01-18 07:04:12,185 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.652173913043478) internal successors, (61), 22 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) [2022-01-18 07:04:12,185 INFO L276 IsEmpty]: Start isEmpty. Operand 3881 states and 14056 transitions. [2022-01-18 07:04:12,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 07:04:12,191 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 07:04:12,191 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 07:04:12,206 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (98)] Forceful destruction successful, exit code 0 [2022-01-18 07:04:12,404 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99,98 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 07:04:12,404 INFO L402 AbstractCegarLoop]: === Iteration 101 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 07:04:12,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 07:04:12,404 INFO L85 PathProgramCache]: Analyzing trace with hash -1281630478, now seen corresponding path program 46 times [2022-01-18 07:04:12,404 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 07:04:12,404 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1791758274] [2022-01-18 07:04:12,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 07:04:12,405 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 07:04:12,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 07:04:12,635 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 07:04:12,636 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 07:04:12,636 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1791758274] [2022-01-18 07:04:12,636 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1791758274] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 07:04:12,636 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [177298284] [2022-01-18 07:04:12,636 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 07:04:12,636 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 07:04:12,636 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 07:04:12,646 INFO L229 MonitoredProcess]: Starting monitored process 99 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 07:04:12,668 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 07:04:12,668 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 07:04:12,668 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (99)] Waiting until timeout for monitored process [2022-01-18 07:04:12,668 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2022-01-18 07:04:12,669 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 07:04:13,256 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 07:04:13,257 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 07:04:13,257 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 07:04:13,258 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 07:04:13,258 INFO L387 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 115 treesize of output 75 [2022-01-18 07:04:13,361 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 07:04:13,361 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 07:04:13,689 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 07:04:13,690 INFO L387 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 215 treesize of output 153 [2022-01-18 07:04:14,181 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 07:04:14,181 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [177298284] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 07:04:14,181 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 07:04:14,181 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 9] total 22 [2022-01-18 07:04:14,181 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1852699831] [2022-01-18 07:04:14,181 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 07:04:14,182 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-18 07:04:14,182 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 07:04:14,182 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-18 07:04:14,182 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=410, Unknown=0, NotChecked=0, Total=506 [2022-01-18 07:04:14,182 INFO L87 Difference]: Start difference. First operand 3881 states and 14056 transitions. Second operand has 23 states, 23 states have (on average 2.6956521739130435) internal successors, (62), 22 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 07:04:15,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 07:04:15,274 INFO L93 Difference]: Finished difference Result 5688 states and 19636 transitions. [2022-01-18 07:04:15,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-01-18 07:04:15,274 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.6956521739130435) internal successors, (62), 22 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 26 [2022-01-18 07:04:15,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 07:04:15,291 INFO L225 Difference]: With dead ends: 5688 [2022-01-18 07:04:15,291 INFO L226 Difference]: Without dead ends: 5637 [2022-01-18 07:04:15,292 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 37 SyntacticMatches, 3 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 871 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=510, Invalid=2460, Unknown=0, NotChecked=0, Total=2970 [2022-01-18 07:04:15,292 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 223 mSDsluCounter, 533 mSDsCounter, 0 mSdLazyCounter, 1002 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 223 SdHoareTripleChecker+Valid, 354 SdHoareTripleChecker+Invalid, 1036 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 1002 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 07:04:15,292 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [223 Valid, 354 Invalid, 1036 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 1002 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-18 07:04:15,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5637 states. [2022-01-18 07:04:15,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5637 to 3903. [2022-01-18 07:04:15,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3903 states, 3902 states have (on average 3.620451050743209) internal successors, (14127), 3902 states have internal predecessors, (14127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 07:04:15,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3903 states to 3903 states and 14127 transitions. [2022-01-18 07:04:15,373 INFO L78 Accepts]: Start accepts. Automaton has 3903 states and 14127 transitions. Word has length 26 [2022-01-18 07:04:15,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 07:04:15,373 INFO L470 AbstractCegarLoop]: Abstraction has 3903 states and 14127 transitions. [2022-01-18 07:04:15,373 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.6956521739130435) internal successors, (62), 22 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 07:04:15,373 INFO L276 IsEmpty]: Start isEmpty. Operand 3903 states and 14127 transitions. [2022-01-18 07:04:15,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 07:04:15,379 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 07:04:15,379 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 07:04:15,397 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (99)] Forceful destruction successful, exit code 0 [2022-01-18 07:04:15,592 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,SelfDestructingSolverStorable100 [2022-01-18 07:04:15,592 INFO L402 AbstractCegarLoop]: === Iteration 102 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 07:04:15,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 07:04:15,593 INFO L85 PathProgramCache]: Analyzing trace with hash -1684834032, now seen corresponding path program 47 times [2022-01-18 07:04:15,593 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 07:04:15,593 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [717566470] [2022-01-18 07:04:15,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 07:04:15,593 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 07:04:15,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 07:04:15,708 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 07:04:15,708 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 07:04:15,708 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [717566470] [2022-01-18 07:04:15,708 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [717566470] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 07:04:15,708 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1074310552] [2022-01-18 07:04:15,708 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 07:04:15,708 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 07:04:15,708 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 07:04:15,709 INFO L229 MonitoredProcess]: Starting monitored process 100 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 07:04:15,710 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (100)] Waiting until timeout for monitored process [2022-01-18 07:04:15,729 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 07:04:15,729 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 07:04:15,730 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-18 07:04:15,730 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 07:04:15,952 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 109 treesize of output 75 [2022-01-18 07:04:16,050 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 07:04:16,050 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 07:04:16,387 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 07:04:16,387 INFO L387 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 215 treesize of output 149 [2022-01-18 07:04:17,005 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 07:04:17,005 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1074310552] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 07:04:17,005 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 07:04:17,005 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 9] total 22 [2022-01-18 07:04:17,005 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1087210526] [2022-01-18 07:04:17,005 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 07:04:17,006 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-18 07:04:17,006 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 07:04:17,006 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-18 07:04:17,006 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=409, Unknown=0, NotChecked=0, Total=506 [2022-01-18 07:04:17,006 INFO L87 Difference]: Start difference. First operand 3903 states and 14127 transitions. Second operand has 23 states, 23 states have (on average 2.6956521739130435) internal successors, (62), 22 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 07:04:18,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 07:04:18,935 INFO L93 Difference]: Finished difference Result 5328 states and 18706 transitions. [2022-01-18 07:04:18,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-01-18 07:04:18,935 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.6956521739130435) internal successors, (62), 22 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 26 [2022-01-18 07:04:18,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 07:04:18,948 INFO L225 Difference]: With dead ends: 5328 [2022-01-18 07:04:18,948 INFO L226 Difference]: Without dead ends: 5256 [2022-01-18 07:04:18,949 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 37 SyntacticMatches, 3 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 714 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=451, Invalid=2099, Unknown=0, NotChecked=0, Total=2550 [2022-01-18 07:04:18,949 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 191 mSDsluCounter, 418 mSDsCounter, 0 mSdLazyCounter, 1059 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 191 SdHoareTripleChecker+Valid, 277 SdHoareTripleChecker+Invalid, 1088 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 1059 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 07:04:18,949 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [191 Valid, 277 Invalid, 1088 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 1059 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-18 07:04:18,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5256 states. [2022-01-18 07:04:19,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5256 to 3909. [2022-01-18 07:04:19,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3909 states, 3908 states have (on average 3.617195496417605) internal successors, (14136), 3908 states have internal predecessors, (14136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 07:04:19,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3909 states to 3909 states and 14136 transitions. [2022-01-18 07:04:19,023 INFO L78 Accepts]: Start accepts. Automaton has 3909 states and 14136 transitions. Word has length 26 [2022-01-18 07:04:19,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 07:04:19,023 INFO L470 AbstractCegarLoop]: Abstraction has 3909 states and 14136 transitions. [2022-01-18 07:04:19,023 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.6956521739130435) internal successors, (62), 22 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 07:04:19,023 INFO L276 IsEmpty]: Start isEmpty. Operand 3909 states and 14136 transitions. [2022-01-18 07:04:19,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 07:04:19,030 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 07:04:19,031 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 07:04:19,055 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (100)] Forceful destruction successful, exit code 0 [2022-01-18 07:04:19,247 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101,100 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 07:04:19,247 INFO L402 AbstractCegarLoop]: === Iteration 103 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 07:04:19,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 07:04:19,248 INFO L85 PathProgramCache]: Analyzing trace with hash 952866832, now seen corresponding path program 48 times [2022-01-18 07:04:19,248 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 07:04:19,248 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1846977842] [2022-01-18 07:04:19,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 07:04:19,248 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 07:04:19,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 07:04:19,434 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 07:04:19,434 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 07:04:19,434 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1846977842] [2022-01-18 07:04:19,434 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1846977842] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 07:04:19,434 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [496223842] [2022-01-18 07:04:19,434 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 07:04:19,435 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 07:04:19,435 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 07:04:19,435 INFO L229 MonitoredProcess]: Starting monitored process 101 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 07:04:19,436 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (101)] Waiting until timeout for monitored process [2022-01-18 07:04:19,462 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 07:04:19,463 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 07:04:19,463 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2022-01-18 07:04:19,463 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 07:04:19,679 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 109 treesize of output 75 [2022-01-18 07:04:19,758 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 07:04:19,758 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 07:04:19,980 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 07:04:19,980 INFO L387 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 211 treesize of output 149 [2022-01-18 07:04:20,453 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 07:04:20,453 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [496223842] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 07:04:20,453 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 07:04:20,453 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 9] total 23 [2022-01-18 07:04:20,453 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [861826731] [2022-01-18 07:04:20,453 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 07:04:20,453 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-18 07:04:20,454 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 07:04:20,454 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-18 07:04:20,454 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=460, Unknown=0, NotChecked=0, Total=552 [2022-01-18 07:04:20,454 INFO L87 Difference]: Start difference. First operand 3909 states and 14136 transitions. Second operand has 24 states, 24 states have (on average 2.625) internal successors, (63), 23 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) [2022-01-18 07:04:21,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 07:04:21,712 INFO L93 Difference]: Finished difference Result 5366 states and 18827 transitions. [2022-01-18 07:04:21,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-01-18 07:04:21,712 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.625) internal successors, (63), 23 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 26 [2022-01-18 07:04:21,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 07:04:21,721 INFO L225 Difference]: With dead ends: 5366 [2022-01-18 07:04:21,721 INFO L226 Difference]: Without dead ends: 5336 [2022-01-18 07:04:21,722 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 37 SyntacticMatches, 2 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 659 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=367, Invalid=1985, Unknown=0, NotChecked=0, Total=2352 [2022-01-18 07:04:21,722 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 153 mSDsluCounter, 451 mSDsCounter, 0 mSdLazyCounter, 941 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 153 SdHoareTripleChecker+Valid, 291 SdHoareTripleChecker+Invalid, 964 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 941 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 07:04:21,722 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [153 Valid, 291 Invalid, 964 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 941 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-18 07:04:21,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5336 states. [2022-01-18 07:04:21,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5336 to 3929. [2022-01-18 07:04:21,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3929 states, 3928 states have (on average 3.6176171079429733) internal successors, (14210), 3928 states have internal predecessors, (14210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 07:04:21,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3929 states to 3929 states and 14210 transitions. [2022-01-18 07:04:21,780 INFO L78 Accepts]: Start accepts. Automaton has 3929 states and 14210 transitions. Word has length 26 [2022-01-18 07:04:21,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 07:04:21,780 INFO L470 AbstractCegarLoop]: Abstraction has 3929 states and 14210 transitions. [2022-01-18 07:04:21,780 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.625) internal successors, (63), 23 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) [2022-01-18 07:04:21,780 INFO L276 IsEmpty]: Start isEmpty. Operand 3929 states and 14210 transitions. [2022-01-18 07:04:21,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 07:04:21,785 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 07:04:21,785 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 07:04:21,801 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (101)] Forceful destruction successful, exit code 0 [2022-01-18 07:04:22,000 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 101 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable102 [2022-01-18 07:04:22,000 INFO L402 AbstractCegarLoop]: === Iteration 104 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 07:04:22,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 07:04:22,001 INFO L85 PathProgramCache]: Analyzing trace with hash -700408688, now seen corresponding path program 53 times [2022-01-18 07:04:22,001 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 07:04:22,001 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [725413356] [2022-01-18 07:04:22,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 07:04:22,001 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 07:04:22,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 07:04:22,293 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 07:04:22,294 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 07:04:22,294 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [725413356] [2022-01-18 07:04:22,294 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [725413356] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 07:04:22,294 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1799882253] [2022-01-18 07:04:22,294 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 07:04:22,294 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 07:04:22,294 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 07:04:22,295 INFO L229 MonitoredProcess]: Starting monitored process 102 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 07:04:22,296 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (102)] Waiting until timeout for monitored process [2022-01-18 07:04:22,322 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 07:04:22,323 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 07:04:22,325 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2022-01-18 07:04:22,325 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 07:04:22,932 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 07:04:22,933 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 07:04:22,933 INFO L387 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 109 treesize of output 75 [2022-01-18 07:04:23,062 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 07:04:23,063 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 07:04:23,413 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 07:04:23,432 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 07:04:23,432 INFO L387 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 199 treesize of output 169 [2022-01-18 07:04:25,813 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 07:04:25,813 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1799882253] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 07:04:25,813 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 07:04:25,813 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 26 [2022-01-18 07:04:25,813 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1224359346] [2022-01-18 07:04:25,813 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 07:04:25,814 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-18 07:04:25,814 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 07:04:25,814 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-18 07:04:25,814 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=528, Unknown=0, NotChecked=0, Total=650 [2022-01-18 07:04:25,814 INFO L87 Difference]: Start difference. First operand 3929 states and 14210 transitions. Second operand has 26 states, 26 states have (on average 2.5) internal successors, (65), 26 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) [2022-01-18 07:04:31,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 07:04:31,687 INFO L93 Difference]: Finished difference Result 10557 states and 35777 transitions. [2022-01-18 07:04:31,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2022-01-18 07:04:31,687 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.5) internal successors, (65), 26 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 26 [2022-01-18 07:04:31,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 07:04:31,707 INFO L225 Difference]: With dead ends: 10557 [2022-01-18 07:04:31,707 INFO L226 Difference]: Without dead ends: 10497 [2022-01-18 07:04:31,708 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 34 SyntacticMatches, 6 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2777 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=1302, Invalid=6008, Unknown=0, NotChecked=0, Total=7310 [2022-01-18 07:04:31,708 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 442 mSDsluCounter, 749 mSDsCounter, 0 mSdLazyCounter, 974 mSolverCounterSat, 88 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 442 SdHoareTripleChecker+Valid, 422 SdHoareTripleChecker+Invalid, 1762 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 88 IncrementalHoareTripleChecker+Valid, 974 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 700 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 07:04:31,708 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [442 Valid, 422 Invalid, 1762 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [88 Valid, 974 Invalid, 0 Unknown, 700 Unchecked, 0.6s Time] [2022-01-18 07:04:31,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10497 states. [2022-01-18 07:04:31,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10497 to 3981. [2022-01-18 07:04:31,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3981 states, 3980 states have (on average 3.6329145728643217) internal successors, (14459), 3980 states have internal predecessors, (14459), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 07:04:31,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3981 states to 3981 states and 14459 transitions. [2022-01-18 07:04:31,810 INFO L78 Accepts]: Start accepts. Automaton has 3981 states and 14459 transitions. Word has length 26 [2022-01-18 07:04:31,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 07:04:31,810 INFO L470 AbstractCegarLoop]: Abstraction has 3981 states and 14459 transitions. [2022-01-18 07:04:31,810 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.5) internal successors, (65), 26 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) [2022-01-18 07:04:31,810 INFO L276 IsEmpty]: Start isEmpty. Operand 3981 states and 14459 transitions. [2022-01-18 07:04:31,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 07:04:31,816 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 07:04:31,816 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 07:04:31,833 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (102)] Ended with exit code 0 [2022-01-18 07:04:32,027 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable103 [2022-01-18 07:04:32,028 INFO L402 AbstractCegarLoop]: === Iteration 105 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 07:04:32,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 07:04:32,028 INFO L85 PathProgramCache]: Analyzing trace with hash 2100650886, now seen corresponding path program 54 times [2022-01-18 07:04:32,028 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 07:04:32,028 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1028109672] [2022-01-18 07:04:32,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 07:04:32,028 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 07:04:32,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 07:04:32,340 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 07:04:32,340 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 07:04:32,340 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1028109672] [2022-01-18 07:04:32,340 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1028109672] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 07:04:32,340 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2147409924] [2022-01-18 07:04:32,340 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 07:04:32,340 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 07:04:32,340 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 07:04:32,356 INFO L229 MonitoredProcess]: Starting monitored process 103 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 07:04:32,402 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (103)] Waiting until timeout for monitored process [2022-01-18 07:04:32,410 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 07:04:32,410 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 07:04:32,411 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2022-01-18 07:04:32,412 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 07:04:32,838 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 07:04:32,841 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 07:04:32,841 INFO L387 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 109 treesize of output 83 [2022-01-18 07:04:33,081 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 07:04:33,081 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 07:04:33,381 INFO L353 Elim1Store]: treesize reduction 10, result has 81.8 percent of original size [2022-01-18 07:04:33,381 INFO L387 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 187 treesize of output 157 [2022-01-18 07:04:35,821 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 07:04:35,821 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2147409924] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 07:04:35,821 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 07:04:35,821 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 26 [2022-01-18 07:04:35,821 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [137064758] [2022-01-18 07:04:35,821 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 07:04:35,822 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-18 07:04:35,822 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 07:04:35,822 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-18 07:04:35,822 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=546, Unknown=0, NotChecked=0, Total=650 [2022-01-18 07:04:35,822 INFO L87 Difference]: Start difference. First operand 3981 states and 14459 transitions. Second operand has 26 states, 26 states have (on average 2.6153846153846154) internal successors, (68), 26 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 07:04:41,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 07:04:41,484 INFO L93 Difference]: Finished difference Result 7676 states and 25599 transitions. [2022-01-18 07:04:41,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2022-01-18 07:04:41,485 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.6153846153846154) internal successors, (68), 26 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-01-18 07:04:41,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 07:04:41,498 INFO L225 Difference]: With dead ends: 7676 [2022-01-18 07:04:41,498 INFO L226 Difference]: Without dead ends: 7631 [2022-01-18 07:04:41,499 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2552 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=1197, Invalid=6635, Unknown=0, NotChecked=0, Total=7832 [2022-01-18 07:04:41,499 INFO L933 BasicCegarLoop]: 44 mSDtfsCounter, 473 mSDsluCounter, 815 mSDsCounter, 0 mSdLazyCounter, 2225 mSolverCounterSat, 80 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 473 SdHoareTripleChecker+Valid, 510 SdHoareTripleChecker+Invalid, 2305 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 80 IncrementalHoareTripleChecker+Valid, 2225 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-01-18 07:04:41,499 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [473 Valid, 510 Invalid, 2305 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [80 Valid, 2225 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-01-18 07:04:41,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7631 states. [2022-01-18 07:04:41,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7631 to 4044. [2022-01-18 07:04:41,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4044 states, 4043 states have (on average 3.6275043284689588) internal successors, (14666), 4043 states have internal predecessors, (14666), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 07:04:41,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4044 states to 4044 states and 14666 transitions. [2022-01-18 07:04:41,576 INFO L78 Accepts]: Start accepts. Automaton has 4044 states and 14666 transitions. Word has length 26 [2022-01-18 07:04:41,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 07:04:41,576 INFO L470 AbstractCegarLoop]: Abstraction has 4044 states and 14666 transitions. [2022-01-18 07:04:41,576 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.6153846153846154) internal successors, (68), 26 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 07:04:41,576 INFO L276 IsEmpty]: Start isEmpty. Operand 4044 states and 14666 transitions. [2022-01-18 07:04:41,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 07:04:41,581 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 07:04:41,581 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 07:04:41,599 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (103)] Forceful destruction successful, exit code 0 [2022-01-18 07:04:41,794 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,SelfDestructingSolverStorable104 [2022-01-18 07:04:41,794 INFO L402 AbstractCegarLoop]: === Iteration 106 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 07:04:41,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 07:04:41,794 INFO L85 PathProgramCache]: Analyzing trace with hash -161931026, now seen corresponding path program 49 times [2022-01-18 07:04:41,794 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 07:04:41,794 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [586802926] [2022-01-18 07:04:41,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 07:04:41,794 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 07:04:41,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 07:04:41,973 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 07:04:41,973 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 07:04:41,973 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [586802926] [2022-01-18 07:04:41,973 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [586802926] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 07:04:41,973 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1149166344] [2022-01-18 07:04:41,973 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 07:04:41,973 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 07:04:41,973 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 07:04:41,974 INFO L229 MonitoredProcess]: Starting monitored process 104 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 07:04:41,975 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (104)] Waiting until timeout for monitored process [2022-01-18 07:04:41,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 07:04:41,997 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2022-01-18 07:04:41,997 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 07:04:42,465 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 07:04:42,465 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 07:04:42,466 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 07:04:42,466 INFO L387 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 115 treesize of output 75 [2022-01-18 07:04:42,564 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 07:04:42,564 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 07:04:42,916 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 07:04:42,916 INFO L387 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 211 treesize of output 149 [2022-01-18 07:04:43,503 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 07:04:43,503 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1149166344] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 07:04:43,503 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 07:04:43,503 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 9] total 23 [2022-01-18 07:04:43,503 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1435211396] [2022-01-18 07:04:43,503 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 07:04:43,503 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-18 07:04:43,503 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 07:04:43,503 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-18 07:04:43,503 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=453, Unknown=0, NotChecked=0, Total=552 [2022-01-18 07:04:43,504 INFO L87 Difference]: Start difference. First operand 4044 states and 14666 transitions. Second operand has 24 states, 24 states have (on average 2.6666666666666665) internal successors, (64), 23 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 07:04:48,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 07:04:48,772 INFO L93 Difference]: Finished difference Result 7727 states and 25963 transitions. [2022-01-18 07:04:48,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2022-01-18 07:04:48,772 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.6666666666666665) internal successors, (64), 23 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-01-18 07:04:48,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 07:04:48,786 INFO L225 Difference]: With dead ends: 7727 [2022-01-18 07:04:48,786 INFO L226 Difference]: Without dead ends: 7676 [2022-01-18 07:04:48,788 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 37 SyntacticMatches, 2 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3757 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=1803, Invalid=8499, Unknown=0, NotChecked=0, Total=10302 [2022-01-18 07:04:48,788 INFO L933 BasicCegarLoop]: 59 mSDtfsCounter, 468 mSDsluCounter, 801 mSDsCounter, 0 mSdLazyCounter, 1801 mSolverCounterSat, 107 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 468 SdHoareTripleChecker+Valid, 521 SdHoareTripleChecker+Invalid, 1908 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 107 IncrementalHoareTripleChecker+Valid, 1801 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-01-18 07:04:48,788 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [468 Valid, 521 Invalid, 1908 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [107 Valid, 1801 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-01-18 07:04:48,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7676 states. [2022-01-18 07:04:48,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7676 to 4078. [2022-01-18 07:04:48,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4078 states, 4077 states have (on average 3.631346578366446) internal successors, (14805), 4077 states have internal predecessors, (14805), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 07:04:48,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4078 states to 4078 states and 14805 transitions. [2022-01-18 07:04:48,885 INFO L78 Accepts]: Start accepts. Automaton has 4078 states and 14805 transitions. Word has length 26 [2022-01-18 07:04:48,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 07:04:48,885 INFO L470 AbstractCegarLoop]: Abstraction has 4078 states and 14805 transitions. [2022-01-18 07:04:48,885 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.6666666666666665) internal successors, (64), 23 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 07:04:48,886 INFO L276 IsEmpty]: Start isEmpty. Operand 4078 states and 14805 transitions. [2022-01-18 07:04:48,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 07:04:48,891 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 07:04:48,891 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 07:04:48,907 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (104)] Forceful destruction successful, exit code 0 [2022-01-18 07:04:49,106 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105,104 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 07:04:49,106 INFO L402 AbstractCegarLoop]: === Iteration 107 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 07:04:49,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 07:04:49,108 INFO L85 PathProgramCache]: Analyzing trace with hash -1385352244, now seen corresponding path program 50 times [2022-01-18 07:04:49,108 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 07:04:49,108 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1326020441] [2022-01-18 07:04:49,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 07:04:49,108 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 07:04:49,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 07:04:49,231 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 07:04:49,231 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 07:04:49,232 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1326020441] [2022-01-18 07:04:49,232 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1326020441] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 07:04:49,232 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [674445332] [2022-01-18 07:04:49,232 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 07:04:49,232 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 07:04:49,232 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 07:04:49,233 INFO L229 MonitoredProcess]: Starting monitored process 105 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 07:04:49,233 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (105)] Waiting until timeout for monitored process [2022-01-18 07:04:49,254 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 07:04:49,254 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 07:04:49,254 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2022-01-18 07:04:49,255 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 07:04:49,599 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 07:04:49,600 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 07:04:49,610 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 07:04:49,610 INFO L387 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 115 treesize of output 101 [2022-01-18 07:04:50,294 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 07:04:50,294 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 07:04:50,612 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 07:04:50,612 INFO L387 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 211 treesize of output 149 [2022-01-18 07:04:51,191 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 07:04:51,191 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [674445332] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 07:04:51,191 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 07:04:51,191 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 23 [2022-01-18 07:04:51,191 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1774247737] [2022-01-18 07:04:51,191 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 07:04:51,192 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-18 07:04:51,192 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 07:04:51,192 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-18 07:04:51,192 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=449, Unknown=0, NotChecked=0, Total=552 [2022-01-18 07:04:51,192 INFO L87 Difference]: Start difference. First operand 4078 states and 14805 transitions. Second operand has 24 states, 24 states have (on average 2.75) internal successors, (66), 23 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) [2022-01-18 07:05:01,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 07:05:01,479 INFO L93 Difference]: Finished difference Result 8968 states and 29878 transitions. [2022-01-18 07:05:01,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 127 states. [2022-01-18 07:05:01,479 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.75) internal successors, (66), 23 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 26 [2022-01-18 07:05:01,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 07:05:01,494 INFO L225 Difference]: With dead ends: 8968 [2022-01-18 07:05:01,494 INFO L226 Difference]: Without dead ends: 8927 [2022-01-18 07:05:01,495 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 34 SyntacticMatches, 4 SemanticMatches, 142 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8195 ImplicationChecksByTransitivity, 9.1s TimeCoverageRelationStatistics Valid=3393, Invalid=17199, Unknown=0, NotChecked=0, Total=20592 [2022-01-18 07:05:01,496 INFO L933 BasicCegarLoop]: 56 mSDtfsCounter, 546 mSDsluCounter, 1079 mSDsCounter, 0 mSdLazyCounter, 2456 mSolverCounterSat, 155 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 546 SdHoareTripleChecker+Valid, 738 SdHoareTripleChecker+Invalid, 2611 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 155 IncrementalHoareTripleChecker+Valid, 2456 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-01-18 07:05:01,496 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [546 Valid, 738 Invalid, 2611 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [155 Valid, 2456 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-01-18 07:05:01,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8927 states. [2022-01-18 07:05:01,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8927 to 4172. [2022-01-18 07:05:01,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4172 states, 4171 states have (on average 3.634859745864301) internal successors, (15161), 4171 states have internal predecessors, (15161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 07:05:01,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4172 states to 4172 states and 15161 transitions. [2022-01-18 07:05:01,585 INFO L78 Accepts]: Start accepts. Automaton has 4172 states and 15161 transitions. Word has length 26 [2022-01-18 07:05:01,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 07:05:01,585 INFO L470 AbstractCegarLoop]: Abstraction has 4172 states and 15161 transitions. [2022-01-18 07:05:01,585 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.75) internal successors, (66), 23 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) [2022-01-18 07:05:01,585 INFO L276 IsEmpty]: Start isEmpty. Operand 4172 states and 15161 transitions. [2022-01-18 07:05:01,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 07:05:01,591 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 07:05:01,591 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 07:05:01,608 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (105)] Forceful destruction successful, exit code 0 [2022-01-18 07:05:01,803 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106,105 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 07:05:01,803 INFO L402 AbstractCegarLoop]: === Iteration 108 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 07:05:01,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 07:05:01,804 INFO L85 PathProgramCache]: Analyzing trace with hash 465150452, now seen corresponding path program 55 times [2022-01-18 07:05:01,804 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 07:05:01,804 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [963216537] [2022-01-18 07:05:01,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 07:05:01,804 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 07:05:01,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 07:05:02,121 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 07:05:02,121 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 07:05:02,121 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [963216537] [2022-01-18 07:05:02,121 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [963216537] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 07:05:02,121 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [79078172] [2022-01-18 07:05:02,121 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 07:05:02,121 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 07:05:02,121 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 07:05:02,122 INFO L229 MonitoredProcess]: Starting monitored process 106 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 07:05:02,123 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (106)] Waiting until timeout for monitored process [2022-01-18 07:05:02,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 07:05:02,148 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2022-01-18 07:05:02,149 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 07:05:02,700 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 07:05:02,700 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 07:05:02,700 INFO L387 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 109 treesize of output 75 [2022-01-18 07:05:02,826 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 07:05:02,827 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 07:05:03,230 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 07:05:03,250 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 07:05:03,250 INFO L387 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 221 treesize of output 181 [2022-01-18 07:05:04,789 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 07:05:04,789 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [79078172] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 07:05:04,789 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 07:05:04,789 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 24 [2022-01-18 07:05:04,789 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1571538320] [2022-01-18 07:05:04,789 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 07:05:04,789 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-18 07:05:04,790 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 07:05:04,790 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-18 07:05:04,790 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=446, Unknown=0, NotChecked=0, Total=552 [2022-01-18 07:05:04,790 INFO L87 Difference]: Start difference. First operand 4172 states and 15161 transitions. Second operand has 24 states, 24 states have (on average 2.5416666666666665) internal successors, (61), 24 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) [2022-01-18 07:05:07,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 07:05:07,853 INFO L93 Difference]: Finished difference Result 7082 states and 24041 transitions. [2022-01-18 07:05:07,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-01-18 07:05:07,853 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.5416666666666665) internal successors, (61), 24 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 26 [2022-01-18 07:05:07,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 07:05:07,865 INFO L225 Difference]: With dead ends: 7082 [2022-01-18 07:05:07,865 INFO L226 Difference]: Without dead ends: 7040 [2022-01-18 07:05:07,866 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 37 SyntacticMatches, 5 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1575 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=846, Invalid=3984, Unknown=0, NotChecked=0, Total=4830 [2022-01-18 07:05:07,866 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 313 mSDsluCounter, 635 mSDsCounter, 0 mSdLazyCounter, 1333 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 313 SdHoareTripleChecker+Valid, 414 SdHoareTripleChecker+Invalid, 1834 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 1333 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 437 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 07:05:07,866 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [313 Valid, 414 Invalid, 1834 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 1333 Invalid, 0 Unknown, 437 Unchecked, 0.6s Time] [2022-01-18 07:05:07,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7040 states. [2022-01-18 07:05:07,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7040 to 4245. [2022-01-18 07:05:07,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4245 states, 4244 states have (on average 3.632893496701225) internal successors, (15418), 4244 states have internal predecessors, (15418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 07:05:07,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4245 states to 4245 states and 15418 transitions. [2022-01-18 07:05:07,971 INFO L78 Accepts]: Start accepts. Automaton has 4245 states and 15418 transitions. Word has length 26 [2022-01-18 07:05:07,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 07:05:07,971 INFO L470 AbstractCegarLoop]: Abstraction has 4245 states and 15418 transitions. [2022-01-18 07:05:07,971 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.5416666666666665) internal successors, (61), 24 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) [2022-01-18 07:05:07,971 INFO L276 IsEmpty]: Start isEmpty. Operand 4245 states and 15418 transitions. [2022-01-18 07:05:07,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 07:05:07,978 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 07:05:07,978 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 07:05:07,994 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (106)] Ended with exit code 0 [2022-01-18 07:05:08,188 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,SelfDestructingSolverStorable107 [2022-01-18 07:05:08,188 INFO L402 AbstractCegarLoop]: === Iteration 109 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 07:05:08,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 07:05:08,190 INFO L85 PathProgramCache]: Analyzing trace with hash -1152382328, now seen corresponding path program 56 times [2022-01-18 07:05:08,190 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 07:05:08,190 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1644970758] [2022-01-18 07:05:08,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 07:05:08,191 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 07:05:08,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 07:05:08,428 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 07:05:08,429 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 07:05:08,429 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1644970758] [2022-01-18 07:05:08,429 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1644970758] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 07:05:08,429 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [852812315] [2022-01-18 07:05:08,429 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 07:05:08,429 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 07:05:08,429 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 07:05:08,430 INFO L229 MonitoredProcess]: Starting monitored process 107 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 07:05:08,430 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (107)] Waiting until timeout for monitored process [2022-01-18 07:05:08,451 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 07:05:08,451 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 07:05:08,452 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2022-01-18 07:05:08,452 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 07:05:08,855 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 07:05:08,855 INFO L387 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 109 treesize of output 91 [2022-01-18 07:05:09,716 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 07:05:09,716 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 07:05:10,150 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 07:05:10,150 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 07:05:10,166 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 07:05:10,166 INFO L387 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 187 treesize of output 149 [2022-01-18 07:05:10,695 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 07:05:10,695 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [852812315] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 07:05:10,695 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 07:05:10,695 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12, 12] total 28 [2022-01-18 07:05:10,695 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1343231057] [2022-01-18 07:05:10,695 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 07:05:10,695 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-01-18 07:05:10,695 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 07:05:10,695 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-01-18 07:05:10,695 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=633, Unknown=0, NotChecked=0, Total=756 [2022-01-18 07:05:10,696 INFO L87 Difference]: Start difference. First operand 4245 states and 15418 transitions. Second operand has 28 states, 28 states have (on average 2.4642857142857144) internal successors, (69), 28 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) [2022-01-18 07:05:19,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 07:05:19,375 INFO L93 Difference]: Finished difference Result 11429 states and 39888 transitions. [2022-01-18 07:05:19,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2022-01-18 07:05:19,376 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.4642857142857144) internal successors, (69), 28 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 26 [2022-01-18 07:05:19,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 07:05:19,397 INFO L225 Difference]: With dead ends: 11429 [2022-01-18 07:05:19,397 INFO L226 Difference]: Without dead ends: 11399 [2022-01-18 07:05:19,397 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 53 SyntacticMatches, 2 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4590 ImplicationChecksByTransitivity, 8.3s TimeCoverageRelationStatistics Valid=1881, Invalid=11229, Unknown=0, NotChecked=0, Total=13110 [2022-01-18 07:05:19,398 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 718 mSDsluCounter, 999 mSDsCounter, 0 mSdLazyCounter, 1400 mSolverCounterSat, 136 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 718 SdHoareTripleChecker+Valid, 540 SdHoareTripleChecker+Invalid, 2543 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 136 IncrementalHoareTripleChecker+Valid, 1400 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1007 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-18 07:05:19,398 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [718 Valid, 540 Invalid, 2543 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [136 Valid, 1400 Invalid, 0 Unknown, 1007 Unchecked, 0.8s Time] [2022-01-18 07:05:19,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11399 states. [2022-01-18 07:05:19,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11399 to 4254. [2022-01-18 07:05:19,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4254 states, 4253 states have (on average 3.6355513754996474) internal successors, (15462), 4253 states have internal predecessors, (15462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 07:05:19,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4254 states to 4254 states and 15462 transitions. [2022-01-18 07:05:19,507 INFO L78 Accepts]: Start accepts. Automaton has 4254 states and 15462 transitions. Word has length 26 [2022-01-18 07:05:19,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 07:05:19,507 INFO L470 AbstractCegarLoop]: Abstraction has 4254 states and 15462 transitions. [2022-01-18 07:05:19,507 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.4642857142857144) internal successors, (69), 28 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) [2022-01-18 07:05:19,507 INFO L276 IsEmpty]: Start isEmpty. Operand 4254 states and 15462 transitions. [2022-01-18 07:05:19,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 07:05:19,512 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 07:05:19,512 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 07:05:19,528 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (107)] Forceful destruction successful, exit code 0 [2022-01-18 07:05:19,715 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108,107 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 07:05:19,715 INFO L402 AbstractCegarLoop]: === Iteration 110 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 07:05:19,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 07:05:19,716 INFO L85 PathProgramCache]: Analyzing trace with hash 895165674, now seen corresponding path program 57 times [2022-01-18 07:05:19,716 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 07:05:19,716 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2113419793] [2022-01-18 07:05:19,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 07:05:19,716 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 07:05:19,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 07:05:20,010 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 07:05:20,010 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 07:05:20,010 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2113419793] [2022-01-18 07:05:20,010 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2113419793] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 07:05:20,010 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [915690168] [2022-01-18 07:05:20,010 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 07:05:20,010 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 07:05:20,010 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 07:05:20,011 INFO L229 MonitoredProcess]: Starting monitored process 108 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 07:05:20,012 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (108)] Waiting until timeout for monitored process [2022-01-18 07:05:20,034 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-01-18 07:05:20,034 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 07:05:20,035 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2022-01-18 07:05:20,035 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 07:05:20,468 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 07:05:20,468 INFO L387 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 115 treesize of output 95 [2022-01-18 07:05:21,059 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 07:05:21,059 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 07:05:21,429 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 07:05:21,430 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 07:05:21,442 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 07:05:21,443 INFO L387 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 187 treesize of output 149 [2022-01-18 07:05:22,037 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 07:05:22,037 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [915690168] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 07:05:22,037 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 07:05:22,037 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12, 12] total 29 [2022-01-18 07:05:22,037 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1921805438] [2022-01-18 07:05:22,037 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 07:05:22,037 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-01-18 07:05:22,037 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 07:05:22,037 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-01-18 07:05:22,037 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=695, Unknown=0, NotChecked=0, Total=812 [2022-01-18 07:05:22,038 INFO L87 Difference]: Start difference. First operand 4254 states and 15462 transitions. Second operand has 29 states, 29 states have (on average 2.3448275862068964) internal successors, (68), 29 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 07:05:44,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 07:05:44,957 INFO L93 Difference]: Finished difference Result 9965 states and 33067 transitions. [2022-01-18 07:05:44,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 159 states. [2022-01-18 07:05:44,957 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.3448275862068964) internal successors, (68), 29 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-01-18 07:05:44,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 07:05:44,977 INFO L225 Difference]: With dead ends: 9965 [2022-01-18 07:05:44,977 INFO L226 Difference]: Without dead ends: 9929 [2022-01-18 07:05:44,978 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 215 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 182 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12686 ImplicationChecksByTransitivity, 20.3s TimeCoverageRelationStatistics Valid=4733, Invalid=28939, Unknown=0, NotChecked=0, Total=33672 [2022-01-18 07:05:44,978 INFO L933 BasicCegarLoop]: 92 mSDtfsCounter, 698 mSDsluCounter, 2041 mSDsCounter, 0 mSdLazyCounter, 4802 mSolverCounterSat, 153 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 698 SdHoareTripleChecker+Valid, 1422 SdHoareTripleChecker+Invalid, 4955 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 153 IncrementalHoareTripleChecker+Valid, 4802 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2022-01-18 07:05:44,979 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [698 Valid, 1422 Invalid, 4955 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [153 Valid, 4802 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2022-01-18 07:05:44,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9929 states. [2022-01-18 07:05:45,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9929 to 4264. [2022-01-18 07:05:45,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4264 states, 4263 states have (on average 3.6396903589021816) internal successors, (15516), 4263 states have internal predecessors, (15516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 07:05:45,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4264 states to 4264 states and 15516 transitions. [2022-01-18 07:05:45,096 INFO L78 Accepts]: Start accepts. Automaton has 4264 states and 15516 transitions. Word has length 26 [2022-01-18 07:05:45,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 07:05:45,096 INFO L470 AbstractCegarLoop]: Abstraction has 4264 states and 15516 transitions. [2022-01-18 07:05:45,096 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.3448275862068964) internal successors, (68), 29 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 07:05:45,097 INFO L276 IsEmpty]: Start isEmpty. Operand 4264 states and 15516 transitions. [2022-01-18 07:05:45,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 07:05:45,103 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 07:05:45,103 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 07:05:45,119 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (108)] Forceful destruction successful, exit code 0 [2022-01-18 07:05:45,312 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109,108 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 07:05:45,312 INFO L402 AbstractCegarLoop]: === Iteration 111 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 07:05:45,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 07:05:45,313 INFO L85 PathProgramCache]: Analyzing trace with hash 1452642064, now seen corresponding path program 58 times [2022-01-18 07:05:45,313 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 07:05:45,313 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1075986256] [2022-01-18 07:05:45,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 07:05:45,313 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 07:05:45,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 07:05:45,607 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 07:05:45,607 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 07:05:45,607 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1075986256] [2022-01-18 07:05:45,607 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1075986256] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 07:05:45,607 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1727922319] [2022-01-18 07:05:45,607 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 07:05:45,607 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 07:05:45,607 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 07:05:45,608 INFO L229 MonitoredProcess]: Starting monitored process 109 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 07:05:45,609 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (109)] Waiting until timeout for monitored process [2022-01-18 07:05:45,631 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 07:05:45,631 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 07:05:45,631 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2022-01-18 07:05:45,632 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 07:05:45,924 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 07:05:45,932 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 07:05:45,933 INFO L387 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 109 treesize of output 91 [2022-01-18 07:05:46,544 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 07:05:46,544 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 07:05:47,169 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 07:05:47,170 INFO L387 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 207 treesize of output 185 [2022-01-18 07:05:51,889 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 07:05:51,889 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1727922319] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 07:05:51,889 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 07:05:51,889 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 24 [2022-01-18 07:05:51,889 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [56666734] [2022-01-18 07:05:51,889 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 07:05:51,889 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-18 07:05:51,889 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 07:05:51,890 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-18 07:05:51,890 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=439, Unknown=0, NotChecked=0, Total=552 [2022-01-18 07:05:51,890 INFO L87 Difference]: Start difference. First operand 4264 states and 15516 transitions. Second operand has 24 states, 24 states have (on average 2.5416666666666665) internal successors, (61), 24 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) [2022-01-18 07:05:57,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 07:05:57,578 INFO L93 Difference]: Finished difference Result 8009 states and 26372 transitions. [2022-01-18 07:05:57,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2022-01-18 07:05:57,579 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.5416666666666665) internal successors, (61), 24 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 26 [2022-01-18 07:05:57,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 07:05:57,592 INFO L225 Difference]: With dead ends: 8009 [2022-01-18 07:05:57,592 INFO L226 Difference]: Without dead ends: 7897 [2022-01-18 07:05:57,593 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 36 SyntacticMatches, 7 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3672 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=1582, Invalid=7924, Unknown=0, NotChecked=0, Total=9506 [2022-01-18 07:05:57,593 INFO L933 BasicCegarLoop]: 51 mSDtfsCounter, 422 mSDsluCounter, 664 mSDsCounter, 0 mSdLazyCounter, 1226 mSolverCounterSat, 85 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 422 SdHoareTripleChecker+Valid, 504 SdHoareTripleChecker+Invalid, 2223 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 85 IncrementalHoareTripleChecker+Valid, 1226 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 912 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-18 07:05:57,593 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [422 Valid, 504 Invalid, 2223 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [85 Valid, 1226 Invalid, 0 Unknown, 912 Unchecked, 0.7s Time] [2022-01-18 07:05:57,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7897 states. [2022-01-18 07:05:57,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7897 to 4271. [2022-01-18 07:05:57,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4271 states, 4270 states have (on average 3.643559718969555) internal successors, (15558), 4270 states have internal predecessors, (15558), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 07:05:57,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4271 states to 4271 states and 15558 transitions. [2022-01-18 07:05:57,675 INFO L78 Accepts]: Start accepts. Automaton has 4271 states and 15558 transitions. Word has length 26 [2022-01-18 07:05:57,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 07:05:57,675 INFO L470 AbstractCegarLoop]: Abstraction has 4271 states and 15558 transitions. [2022-01-18 07:05:57,675 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.5416666666666665) internal successors, (61), 24 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) [2022-01-18 07:05:57,675 INFO L276 IsEmpty]: Start isEmpty. Operand 4271 states and 15558 transitions. [2022-01-18 07:05:57,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 07:05:57,681 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 07:05:57,681 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 07:05:57,697 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (109)] Ended with exit code 0 [2022-01-18 07:05:57,895 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110,109 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 07:05:57,896 INFO L402 AbstractCegarLoop]: === Iteration 112 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 07:05:57,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 07:05:57,896 INFO L85 PathProgramCache]: Analyzing trace with hash 55443366, now seen corresponding path program 51 times [2022-01-18 07:05:57,896 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 07:05:57,896 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [272856485] [2022-01-18 07:05:57,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 07:05:57,896 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 07:05:57,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 07:05:58,145 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 07:05:58,146 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 07:05:58,146 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [272856485] [2022-01-18 07:05:58,146 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [272856485] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 07:05:58,146 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2023013807] [2022-01-18 07:05:58,146 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 07:05:58,146 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 07:05:58,146 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 07:05:58,147 INFO L229 MonitoredProcess]: Starting monitored process 110 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 07:05:58,147 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (110)] Waiting until timeout for monitored process [2022-01-18 07:05:58,171 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 07:05:58,171 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 07:05:58,172 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-18 07:05:58,172 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 07:05:58,721 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 07:05:58,722 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 07:05:58,723 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 07:05:58,723 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 07:05:58,723 INFO L387 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 115 treesize of output 75 [2022-01-18 07:05:58,822 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 07:05:58,822 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 07:05:59,213 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 07:05:59,214 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 07:05:59,214 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 07:05:59,227 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 07:05:59,227 INFO L387 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 211 treesize of output 143 [2022-01-18 07:05:59,467 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 07:05:59,467 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2023013807] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 07:05:59,467 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 07:05:59,467 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 23 [2022-01-18 07:05:59,467 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [177519785] [2022-01-18 07:05:59,468 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 07:05:59,468 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-18 07:05:59,468 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 07:05:59,468 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-18 07:05:59,468 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=466, Unknown=0, NotChecked=0, Total=552 [2022-01-18 07:05:59,468 INFO L87 Difference]: Start difference. First operand 4271 states and 15558 transitions. Second operand has 24 states, 24 states have (on average 2.625) internal successors, (63), 23 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) [2022-01-18 07:06:02,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 07:06:02,379 INFO L93 Difference]: Finished difference Result 6178 states and 21380 transitions. [2022-01-18 07:06:02,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-01-18 07:06:02,379 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.625) internal successors, (63), 23 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 26 [2022-01-18 07:06:02,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 07:06:02,390 INFO L225 Difference]: With dead ends: 6178 [2022-01-18 07:06:02,390 INFO L226 Difference]: Without dead ends: 6134 [2022-01-18 07:06:02,391 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 35 SyntacticMatches, 4 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1446 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=776, Invalid=3780, Unknown=0, NotChecked=0, Total=4556 [2022-01-18 07:06:02,391 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 353 mSDsluCounter, 694 mSDsCounter, 0 mSdLazyCounter, 1647 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 353 SdHoareTripleChecker+Valid, 418 SdHoareTripleChecker+Invalid, 1708 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 1647 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-18 07:06:02,391 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [353 Valid, 418 Invalid, 1708 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 1647 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-18 07:06:02,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6134 states. [2022-01-18 07:06:02,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6134 to 4358. [2022-01-18 07:06:02,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4358 states, 4357 states have (on average 3.640578379619004) internal successors, (15862), 4357 states have internal predecessors, (15862), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 07:06:02,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4358 states to 4358 states and 15862 transitions. [2022-01-18 07:06:02,461 INFO L78 Accepts]: Start accepts. Automaton has 4358 states and 15862 transitions. Word has length 26 [2022-01-18 07:06:02,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 07:06:02,462 INFO L470 AbstractCegarLoop]: Abstraction has 4358 states and 15862 transitions. [2022-01-18 07:06:02,462 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.625) internal successors, (63), 23 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) [2022-01-18 07:06:02,462 INFO L276 IsEmpty]: Start isEmpty. Operand 4358 states and 15862 transitions. [2022-01-18 07:06:02,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 07:06:02,467 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 07:06:02,468 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 07:06:02,483 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (110)] Forceful destruction successful, exit code 0 [2022-01-18 07:06:02,676 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,SelfDestructingSolverStorable111 [2022-01-18 07:06:02,677 INFO L402 AbstractCegarLoop]: === Iteration 113 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 07:06:02,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 07:06:02,677 INFO L85 PathProgramCache]: Analyzing trace with hash 899538176, now seen corresponding path program 52 times [2022-01-18 07:06:02,677 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 07:06:02,677 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2100754646] [2022-01-18 07:06:02,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 07:06:02,677 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 07:06:02,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 07:06:02,837 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 07:06:02,837 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 07:06:02,837 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2100754646] [2022-01-18 07:06:02,837 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2100754646] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 07:06:02,837 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1310723678] [2022-01-18 07:06:02,837 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 07:06:02,837 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 07:06:02,837 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 07:06:02,851 INFO L229 MonitoredProcess]: Starting monitored process 111 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 07:06:02,896 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 07:06:02,896 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 07:06:02,896 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2022-01-18 07:06:02,897 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 07:06:02,897 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (111)] Waiting until timeout for monitored process [2022-01-18 07:06:03,325 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 07:06:03,325 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 07:06:03,326 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 07:06:03,326 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 07:06:03,327 INFO L387 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 115 treesize of output 75 [2022-01-18 07:06:03,442 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 07:06:03,442 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 07:06:03,766 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 07:06:03,766 INFO L387 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 211 treesize of output 149 [2022-01-18 07:06:04,232 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 07:06:04,232 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1310723678] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 07:06:04,232 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 07:06:04,232 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 9] total 24 [2022-01-18 07:06:04,232 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1700371429] [2022-01-18 07:06:04,232 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 07:06:04,232 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-18 07:06:04,232 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 07:06:04,233 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-18 07:06:04,233 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=498, Unknown=0, NotChecked=0, Total=600 [2022-01-18 07:06:04,233 INFO L87 Difference]: Start difference. First operand 4358 states and 15862 transitions. Second operand has 25 states, 25 states have (on average 2.6) internal successors, (65), 24 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) [2022-01-18 07:06:10,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 07:06:10,128 INFO L93 Difference]: Finished difference Result 7652 states and 26237 transitions. [2022-01-18 07:06:10,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2022-01-18 07:06:10,128 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.6) internal successors, (65), 24 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 26 [2022-01-18 07:06:10,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 07:06:10,143 INFO L225 Difference]: With dead ends: 7652 [2022-01-18 07:06:10,143 INFO L226 Difference]: Without dead ends: 7604 [2022-01-18 07:06:10,143 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 115 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5068 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=2232, Invalid=11340, Unknown=0, NotChecked=0, Total=13572 [2022-01-18 07:06:10,143 INFO L933 BasicCegarLoop]: 54 mSDtfsCounter, 403 mSDsluCounter, 744 mSDsCounter, 0 mSdLazyCounter, 1745 mSolverCounterSat, 102 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 403 SdHoareTripleChecker+Valid, 499 SdHoareTripleChecker+Invalid, 1847 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 102 IncrementalHoareTripleChecker+Valid, 1745 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-18 07:06:10,143 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [403 Valid, 499 Invalid, 1847 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [102 Valid, 1745 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-18 07:06:10,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7604 states. [2022-01-18 07:06:10,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7604 to 4393. [2022-01-18 07:06:10,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4393 states, 4392 states have (on average 3.631375227686703) internal successors, (15949), 4392 states have internal predecessors, (15949), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 07:06:10,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4393 states to 4393 states and 15949 transitions. [2022-01-18 07:06:10,270 INFO L78 Accepts]: Start accepts. Automaton has 4393 states and 15949 transitions. Word has length 26 [2022-01-18 07:06:10,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 07:06:10,270 INFO L470 AbstractCegarLoop]: Abstraction has 4393 states and 15949 transitions. [2022-01-18 07:06:10,270 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.6) internal successors, (65), 24 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) [2022-01-18 07:06:10,270 INFO L276 IsEmpty]: Start isEmpty. Operand 4393 states and 15949 transitions. [2022-01-18 07:06:10,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 07:06:10,279 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 07:06:10,279 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 07:06:10,301 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (111)] Forceful destruction successful, exit code 0 [2022-01-18 07:06:10,480 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,SelfDestructingSolverStorable112 [2022-01-18 07:06:10,480 INFO L402 AbstractCegarLoop]: === Iteration 114 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 07:06:10,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 07:06:10,480 INFO L85 PathProgramCache]: Analyzing trace with hash 980937232, now seen corresponding path program 53 times [2022-01-18 07:06:10,480 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 07:06:10,480 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [959898026] [2022-01-18 07:06:10,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 07:06:10,480 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 07:06:10,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 07:06:10,629 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 07:06:10,629 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 07:06:10,629 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [959898026] [2022-01-18 07:06:10,629 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [959898026] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 07:06:10,629 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [133961097] [2022-01-18 07:06:10,629 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 07:06:10,630 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 07:06:10,630 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 07:06:10,630 INFO L229 MonitoredProcess]: Starting monitored process 112 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 07:06:10,631 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (112)] Waiting until timeout for monitored process [2022-01-18 07:06:10,652 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 07:06:10,652 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 07:06:10,652 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-18 07:06:10,653 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 07:06:11,023 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 07:06:11,023 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 07:06:11,023 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 07:06:11,024 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 07:06:11,024 INFO L387 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 119 treesize of output 75 [2022-01-18 07:06:11,116 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 07:06:11,116 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 07:06:11,446 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 07:06:11,446 INFO L387 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 215 treesize of output 149 [2022-01-18 07:06:12,013 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 07:06:12,013 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [133961097] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 07:06:12,013 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 07:06:12,013 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 9] total 23 [2022-01-18 07:06:12,013 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1381543013] [2022-01-18 07:06:12,013 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 07:06:12,014 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-18 07:06:12,014 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 07:06:12,014 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-18 07:06:12,014 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=456, Unknown=0, NotChecked=0, Total=552 [2022-01-18 07:06:12,014 INFO L87 Difference]: Start difference. First operand 4393 states and 15949 transitions. Second operand has 24 states, 24 states have (on average 2.6666666666666665) internal successors, (64), 23 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 07:06:18,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 07:06:18,627 INFO L93 Difference]: Finished difference Result 7518 states and 25500 transitions. [2022-01-18 07:06:18,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2022-01-18 07:06:18,627 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.6666666666666665) internal successors, (64), 23 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-01-18 07:06:18,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 07:06:18,641 INFO L225 Difference]: With dead ends: 7518 [2022-01-18 07:06:18,641 INFO L226 Difference]: Without dead ends: 7389 [2022-01-18 07:06:18,642 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 37 SyntacticMatches, 2 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3837 ImplicationChecksByTransitivity, 5.9s TimeCoverageRelationStatistics Valid=1813, Invalid=8693, Unknown=0, NotChecked=0, Total=10506 [2022-01-18 07:06:18,642 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 381 mSDsluCounter, 857 mSDsCounter, 0 mSdLazyCounter, 1837 mSolverCounterSat, 107 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 381 SdHoareTripleChecker+Valid, 563 SdHoareTripleChecker+Invalid, 2115 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 107 IncrementalHoareTripleChecker+Valid, 1837 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 171 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-01-18 07:06:18,642 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [381 Valid, 563 Invalid, 2115 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [107 Valid, 1837 Invalid, 0 Unknown, 171 Unchecked, 1.0s Time] [2022-01-18 07:06:18,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7389 states. [2022-01-18 07:06:18,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7389 to 4425. [2022-01-18 07:06:18,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4425 states, 4424 states have (on average 3.625) internal successors, (16037), 4424 states have internal predecessors, (16037), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 07:06:18,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4425 states to 4425 states and 16037 transitions. [2022-01-18 07:06:18,723 INFO L78 Accepts]: Start accepts. Automaton has 4425 states and 16037 transitions. Word has length 26 [2022-01-18 07:06:18,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 07:06:18,723 INFO L470 AbstractCegarLoop]: Abstraction has 4425 states and 16037 transitions. [2022-01-18 07:06:18,723 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.6666666666666665) internal successors, (64), 23 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 07:06:18,724 INFO L276 IsEmpty]: Start isEmpty. Operand 4425 states and 16037 transitions. [2022-01-18 07:06:18,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 07:06:18,729 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 07:06:18,730 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 07:06:18,745 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (112)] Forceful destruction successful, exit code 0 [2022-01-18 07:06:18,941 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,SelfDestructingSolverStorable113 [2022-01-18 07:06:18,941 INFO L402 AbstractCegarLoop]: === Iteration 115 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 07:06:18,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 07:06:18,942 INFO L85 PathProgramCache]: Analyzing trace with hash 186452920, now seen corresponding path program 59 times [2022-01-18 07:06:18,942 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 07:06:18,942 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1498926484] [2022-01-18 07:06:18,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 07:06:18,942 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 07:06:18,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 07:06:19,221 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 07:06:19,221 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 07:06:19,222 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1498926484] [2022-01-18 07:06:19,222 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1498926484] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 07:06:19,222 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1123201366] [2022-01-18 07:06:19,222 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 07:06:19,222 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 07:06:19,222 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 07:06:19,224 INFO L229 MonitoredProcess]: Starting monitored process 113 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 07:06:19,224 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (113)] Waiting until timeout for monitored process [2022-01-18 07:06:19,249 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 07:06:19,249 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 07:06:19,249 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2022-01-18 07:06:19,250 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 07:06:19,793 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 07:06:19,794 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 07:06:19,794 INFO L387 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 109 treesize of output 75 [2022-01-18 07:06:19,902 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 07:06:19,902 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 07:06:20,356 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 07:06:20,372 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 07:06:20,372 INFO L387 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 221 treesize of output 181 [2022-01-18 07:06:23,458 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 07:06:23,459 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1123201366] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 07:06:23,459 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 07:06:23,459 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-01-18 07:06:23,459 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1822900069] [2022-01-18 07:06:23,459 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 07:06:23,459 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-18 07:06:23,459 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 07:06:23,459 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-18 07:06:23,459 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=501, Unknown=0, NotChecked=0, Total=600 [2022-01-18 07:06:23,459 INFO L87 Difference]: Start difference. First operand 4425 states and 16037 transitions. Second operand has 25 states, 25 states have (on average 2.48) internal successors, (62), 25 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 07:06:24,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 07:06:24,309 INFO L93 Difference]: Finished difference Result 6836 states and 23626 transitions. [2022-01-18 07:06:24,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-01-18 07:06:24,309 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.48) internal successors, (62), 25 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 26 [2022-01-18 07:06:24,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 07:06:24,321 INFO L225 Difference]: With dead ends: 6836 [2022-01-18 07:06:24,321 INFO L226 Difference]: Without dead ends: 6776 [2022-01-18 07:06:24,321 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 36 SyntacticMatches, 3 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 498 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=225, Invalid=1335, Unknown=0, NotChecked=0, Total=1560 [2022-01-18 07:06:24,323 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 128 mSDsluCounter, 448 mSDsCounter, 0 mSdLazyCounter, 476 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 128 SdHoareTripleChecker+Valid, 289 SdHoareTripleChecker+Invalid, 755 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 476 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 260 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 07:06:24,323 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [128 Valid, 289 Invalid, 755 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 476 Invalid, 0 Unknown, 260 Unchecked, 0.3s Time] [2022-01-18 07:06:24,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6776 states. [2022-01-18 07:06:24,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6776 to 4439. [2022-01-18 07:06:24,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4439 states, 4438 states have (on average 3.626858945470933) internal successors, (16096), 4438 states have internal predecessors, (16096), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 07:06:24,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4439 states to 4439 states and 16096 transitions. [2022-01-18 07:06:24,399 INFO L78 Accepts]: Start accepts. Automaton has 4439 states and 16096 transitions. Word has length 26 [2022-01-18 07:06:24,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 07:06:24,399 INFO L470 AbstractCegarLoop]: Abstraction has 4439 states and 16096 transitions. [2022-01-18 07:06:24,399 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.48) internal successors, (62), 25 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 07:06:24,399 INFO L276 IsEmpty]: Start isEmpty. Operand 4439 states and 16096 transitions. [2022-01-18 07:06:24,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 07:06:24,405 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 07:06:24,405 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 07:06:24,420 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (113)] Forceful destruction successful, exit code 0 [2022-01-18 07:06:24,620 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,SelfDestructingSolverStorable114 [2022-01-18 07:06:24,620 INFO L402 AbstractCegarLoop]: === Iteration 116 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 07:06:24,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 07:06:24,620 INFO L85 PathProgramCache]: Analyzing trace with hash -1307454802, now seen corresponding path program 60 times [2022-01-18 07:06:24,620 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 07:06:24,620 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [892270947] [2022-01-18 07:06:24,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 07:06:24,621 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 07:06:24,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 07:06:24,888 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 07:06:24,889 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 07:06:24,889 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [892270947] [2022-01-18 07:06:24,889 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [892270947] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 07:06:24,889 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [312881715] [2022-01-18 07:06:24,889 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 07:06:24,889 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 07:06:24,889 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 07:06:24,890 INFO L229 MonitoredProcess]: Starting monitored process 114 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 07:06:24,890 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (114)] Waiting until timeout for monitored process [2022-01-18 07:06:24,914 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 07:06:24,914 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 07:06:24,914 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2022-01-18 07:06:24,915 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 07:06:25,558 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 07:06:25,562 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 07:06:25,562 INFO L387 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 109 treesize of output 83 [2022-01-18 07:06:25,974 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 07:06:25,974 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 07:06:26,486 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 07:06:26,486 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 07:06:26,502 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 07:06:26,502 INFO L387 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 187 treesize of output 149 [2022-01-18 07:06:27,154 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 07:06:27,154 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [312881715] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 07:06:27,154 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 07:06:27,154 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 28 [2022-01-18 07:06:27,154 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1480938308] [2022-01-18 07:06:27,154 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 07:06:27,155 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-01-18 07:06:27,155 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 07:06:27,155 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-01-18 07:06:27,155 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=643, Unknown=0, NotChecked=0, Total=756 [2022-01-18 07:06:27,155 INFO L87 Difference]: Start difference. First operand 4439 states and 16096 transitions. Second operand has 28 states, 28 states have (on average 2.4285714285714284) internal successors, (68), 28 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 07:06:32,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 07:06:32,427 INFO L93 Difference]: Finished difference Result 9226 states and 31903 transitions. [2022-01-18 07:06:32,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 102 states. [2022-01-18 07:06:32,427 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.4285714285714284) internal successors, (68), 28 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-01-18 07:06:32,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 07:06:32,444 INFO L225 Difference]: With dead ends: 9226 [2022-01-18 07:06:32,444 INFO L226 Difference]: Without dead ends: 9196 [2022-01-18 07:06:32,445 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 42 SyntacticMatches, 1 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4450 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=1277, Invalid=11155, Unknown=0, NotChecked=0, Total=12432 [2022-01-18 07:06:32,446 INFO L933 BasicCegarLoop]: 50 mSDtfsCounter, 352 mSDsluCounter, 1019 mSDsCounter, 0 mSdLazyCounter, 1350 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 352 SdHoareTripleChecker+Valid, 617 SdHoareTripleChecker+Invalid, 1976 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 1350 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 571 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-18 07:06:32,446 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [352 Valid, 617 Invalid, 1976 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 1350 Invalid, 0 Unknown, 571 Unchecked, 0.8s Time] [2022-01-18 07:06:32,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9196 states. [2022-01-18 07:06:32,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9196 to 4452. [2022-01-18 07:06:32,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4452 states, 4451 states have (on average 3.630644798921591) internal successors, (16160), 4451 states have internal predecessors, (16160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 07:06:32,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4452 states to 4452 states and 16160 transitions. [2022-01-18 07:06:32,564 INFO L78 Accepts]: Start accepts. Automaton has 4452 states and 16160 transitions. Word has length 26 [2022-01-18 07:06:32,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 07:06:32,565 INFO L470 AbstractCegarLoop]: Abstraction has 4452 states and 16160 transitions. [2022-01-18 07:06:32,565 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.4285714285714284) internal successors, (68), 28 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 07:06:32,565 INFO L276 IsEmpty]: Start isEmpty. Operand 4452 states and 16160 transitions. [2022-01-18 07:06:32,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 07:06:32,571 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 07:06:32,571 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 07:06:32,588 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (114)] Forceful destruction successful, exit code 0 [2022-01-18 07:06:32,783 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115,114 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 07:06:32,783 INFO L402 AbstractCegarLoop]: === Iteration 117 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 07:06:32,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 07:06:32,784 INFO L85 PathProgramCache]: Analyzing trace with hash -1431079860, now seen corresponding path program 61 times [2022-01-18 07:06:32,784 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 07:06:32,784 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1499628049] [2022-01-18 07:06:32,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 07:06:32,784 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 07:06:32,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 07:06:33,024 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 07:06:33,024 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 07:06:33,024 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1499628049] [2022-01-18 07:06:33,024 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1499628049] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 07:06:33,024 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1162972309] [2022-01-18 07:06:33,024 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 07:06:33,024 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 07:06:33,024 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 07:06:33,025 INFO L229 MonitoredProcess]: Starting monitored process 115 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 07:06:33,026 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (115)] Waiting until timeout for monitored process [2022-01-18 07:06:33,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 07:06:33,048 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2022-01-18 07:06:33,048 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 07:06:33,429 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 07:06:33,433 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 07:06:33,433 INFO L387 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 109 treesize of output 83 [2022-01-18 07:06:33,857 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 07:06:33,857 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 07:06:34,177 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 07:06:34,190 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 07:06:34,190 INFO L387 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 187 treesize of output 157 [2022-01-18 07:06:36,188 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 07:06:36,188 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1162972309] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 07:06:36,188 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 07:06:36,189 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 24 [2022-01-18 07:06:36,189 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [91111504] [2022-01-18 07:06:36,189 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 07:06:36,189 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-18 07:06:36,189 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 07:06:36,189 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-18 07:06:36,189 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=449, Unknown=0, NotChecked=0, Total=552 [2022-01-18 07:06:36,189 INFO L87 Difference]: Start difference. First operand 4452 states and 16160 transitions. Second operand has 24 states, 24 states have (on average 2.5416666666666665) internal successors, (61), 24 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) [2022-01-18 07:06:39,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 07:06:39,846 INFO L93 Difference]: Finished difference Result 7514 states and 25642 transitions. [2022-01-18 07:06:39,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-01-18 07:06:39,846 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.5416666666666665) internal successors, (61), 24 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 26 [2022-01-18 07:06:39,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 07:06:39,859 INFO L225 Difference]: With dead ends: 7514 [2022-01-18 07:06:39,859 INFO L226 Difference]: Without dead ends: 7484 [2022-01-18 07:06:39,860 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 34 SyntacticMatches, 5 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1205 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=683, Invalid=3223, Unknown=0, NotChecked=0, Total=3906 [2022-01-18 07:06:39,860 INFO L933 BasicCegarLoop]: 43 mSDtfsCounter, 357 mSDsluCounter, 700 mSDsCounter, 0 mSdLazyCounter, 1267 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 357 SdHoareTripleChecker+Valid, 438 SdHoareTripleChecker+Invalid, 1817 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 1267 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 483 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-18 07:06:39,860 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [357 Valid, 438 Invalid, 1817 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 1267 Invalid, 0 Unknown, 483 Unchecked, 0.7s Time] [2022-01-18 07:06:39,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7484 states. [2022-01-18 07:06:39,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7484 to 4463. [2022-01-18 07:06:39,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4463 states, 4462 states have (on average 3.630434782608696) internal successors, (16199), 4462 states have internal predecessors, (16199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 07:06:39,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4463 states to 4463 states and 16199 transitions. [2022-01-18 07:06:39,940 INFO L78 Accepts]: Start accepts. Automaton has 4463 states and 16199 transitions. Word has length 26 [2022-01-18 07:06:39,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 07:06:39,940 INFO L470 AbstractCegarLoop]: Abstraction has 4463 states and 16199 transitions. [2022-01-18 07:06:39,940 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.5416666666666665) internal successors, (61), 24 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) [2022-01-18 07:06:39,940 INFO L276 IsEmpty]: Start isEmpty. Operand 4463 states and 16199 transitions. [2022-01-18 07:06:39,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 07:06:39,946 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 07:06:39,946 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 07:06:39,962 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (115)] Forceful destruction successful, exit code 0 [2022-01-18 07:06:40,161 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116,115 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 07:06:40,161 INFO L402 AbstractCegarLoop]: === Iteration 118 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 07:06:40,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 07:06:40,161 INFO L85 PathProgramCache]: Analyzing trace with hash 1173944532, now seen corresponding path program 62 times [2022-01-18 07:06:40,161 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 07:06:40,162 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [35156711] [2022-01-18 07:06:40,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 07:06:40,162 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 07:06:40,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 07:06:40,403 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 07:06:40,403 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 07:06:40,403 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [35156711] [2022-01-18 07:06:40,403 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [35156711] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 07:06:40,403 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1380914130] [2022-01-18 07:06:40,403 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 07:06:40,403 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 07:06:40,403 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 07:06:40,404 INFO L229 MonitoredProcess]: Starting monitored process 116 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 07:06:40,405 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (116)] Waiting until timeout for monitored process [2022-01-18 07:06:40,426 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 07:06:40,426 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 07:06:40,427 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2022-01-18 07:06:40,427 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 07:06:40,719 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 07:06:40,722 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 07:06:40,723 INFO L387 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 109 treesize of output 83 [2022-01-18 07:06:41,139 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 07:06:41,139 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 07:06:41,544 INFO L353 Elim1Store]: treesize reduction 10, result has 81.8 percent of original size [2022-01-18 07:06:41,544 INFO L387 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 199 treesize of output 157 [2022-01-18 07:06:42,956 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 07:06:42,956 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1380914130] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 07:06:42,956 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 07:06:42,956 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 26 [2022-01-18 07:06:42,956 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1738453459] [2022-01-18 07:06:42,956 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 07:06:42,957 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-18 07:06:42,957 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 07:06:42,957 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-18 07:06:42,957 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=545, Unknown=0, NotChecked=0, Total=650 [2022-01-18 07:06:42,957 INFO L87 Difference]: Start difference. First operand 4463 states and 16199 transitions. Second operand has 26 states, 26 states have (on average 2.576923076923077) internal successors, (67), 26 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) [2022-01-18 07:06:48,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 07:06:48,071 INFO L93 Difference]: Finished difference Result 8053 states and 27252 transitions. [2022-01-18 07:06:48,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-01-18 07:06:48,071 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.576923076923077) internal successors, (67), 26 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 26 [2022-01-18 07:06:48,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 07:06:48,085 INFO L225 Difference]: With dead ends: 8053 [2022-01-18 07:06:48,085 INFO L226 Difference]: Without dead ends: 7973 [2022-01-18 07:06:48,086 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1378 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=759, Invalid=4211, Unknown=0, NotChecked=0, Total=4970 [2022-01-18 07:06:48,086 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 332 mSDsluCounter, 675 mSDsCounter, 0 mSdLazyCounter, 1832 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 332 SdHoareTripleChecker+Valid, 415 SdHoareTripleChecker+Invalid, 1887 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 1832 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-01-18 07:06:48,086 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [332 Valid, 415 Invalid, 1887 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 1832 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-01-18 07:06:48,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7973 states. [2022-01-18 07:06:48,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7973 to 4488. [2022-01-18 07:06:48,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4488 states, 4487 states have (on average 3.6244706931134387) internal successors, (16263), 4487 states have internal predecessors, (16263), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 07:06:48,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4488 states to 4488 states and 16263 transitions. [2022-01-18 07:06:48,167 INFO L78 Accepts]: Start accepts. Automaton has 4488 states and 16263 transitions. Word has length 26 [2022-01-18 07:06:48,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 07:06:48,167 INFO L470 AbstractCegarLoop]: Abstraction has 4488 states and 16263 transitions. [2022-01-18 07:06:48,167 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.576923076923077) internal successors, (67), 26 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) [2022-01-18 07:06:48,168 INFO L276 IsEmpty]: Start isEmpty. Operand 4488 states and 16263 transitions. [2022-01-18 07:06:48,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 07:06:48,173 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 07:06:48,174 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 07:06:48,190 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (116)] Forceful destruction successful, exit code 0 [2022-01-18 07:06:48,379 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,SelfDestructingSolverStorable117 [2022-01-18 07:06:48,379 INFO L402 AbstractCegarLoop]: === Iteration 119 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 07:06:48,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 07:06:48,379 INFO L85 PathProgramCache]: Analyzing trace with hash -72776118, now seen corresponding path program 63 times [2022-01-18 07:06:48,380 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 07:06:48,380 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [37993905] [2022-01-18 07:06:48,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 07:06:48,380 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 07:06:48,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 07:06:48,603 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 07:06:48,603 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 07:06:48,603 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [37993905] [2022-01-18 07:06:48,603 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [37993905] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 07:06:48,603 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1484885248] [2022-01-18 07:06:48,603 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 07:06:48,603 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 07:06:48,603 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 07:06:48,604 INFO L229 MonitoredProcess]: Starting monitored process 117 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 07:06:48,605 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (117)] Waiting until timeout for monitored process [2022-01-18 07:06:48,626 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 07:06:48,626 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 07:06:48,626 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2022-01-18 07:06:48,627 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 07:06:49,077 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 07:06:49,078 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 07:06:49,078 INFO L387 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 109 treesize of output 75 [2022-01-18 07:06:49,183 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 07:06:49,183 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 07:06:49,593 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 07:06:49,606 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 07:06:49,606 INFO L387 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 187 treesize of output 157 [2022-01-18 07:06:52,677 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 07:06:52,678 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1484885248] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 07:06:52,678 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 07:06:52,678 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 24 [2022-01-18 07:06:52,678 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [887161620] [2022-01-18 07:06:52,678 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 07:06:52,678 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-18 07:06:52,678 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 07:06:52,678 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-18 07:06:52,678 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=455, Unknown=0, NotChecked=0, Total=552 [2022-01-18 07:06:52,678 INFO L87 Difference]: Start difference. First operand 4488 states and 16263 transitions. Second operand has 24 states, 24 states have (on average 2.5833333333333335) internal successors, (62), 24 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 07:06:54,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 07:06:54,420 INFO L93 Difference]: Finished difference Result 5858 states and 20217 transitions. [2022-01-18 07:06:54,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-01-18 07:06:54,420 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.5833333333333335) internal successors, (62), 24 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 26 [2022-01-18 07:06:54,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 07:06:54,429 INFO L225 Difference]: With dead ends: 5858 [2022-01-18 07:06:54,429 INFO L226 Difference]: Without dead ends: 5828 [2022-01-18 07:06:54,430 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 38 SyntacticMatches, 5 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 799 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=425, Invalid=2125, Unknown=0, NotChecked=0, Total=2550 [2022-01-18 07:06:54,430 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 267 mSDsluCounter, 636 mSDsCounter, 0 mSdLazyCounter, 1000 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 267 SdHoareTripleChecker+Valid, 362 SdHoareTripleChecker+Invalid, 1512 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 1000 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 457 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 07:06:54,430 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [267 Valid, 362 Invalid, 1512 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 1000 Invalid, 0 Unknown, 457 Unchecked, 0.5s Time] [2022-01-18 07:06:54,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5828 states. [2022-01-18 07:06:54,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5828 to 4483. [2022-01-18 07:06:54,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4483 states, 4482 states have (on average 3.6229361892012495) internal successors, (16238), 4482 states have internal predecessors, (16238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 07:06:54,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4483 states to 4483 states and 16238 transitions. [2022-01-18 07:06:54,496 INFO L78 Accepts]: Start accepts. Automaton has 4483 states and 16238 transitions. Word has length 26 [2022-01-18 07:06:54,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 07:06:54,496 INFO L470 AbstractCegarLoop]: Abstraction has 4483 states and 16238 transitions. [2022-01-18 07:06:54,496 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.5833333333333335) internal successors, (62), 24 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 07:06:54,496 INFO L276 IsEmpty]: Start isEmpty. Operand 4483 states and 16238 transitions. [2022-01-18 07:06:54,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 07:06:54,502 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 07:06:54,502 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 07:06:54,518 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (117)] Forceful destruction successful, exit code 0 [2022-01-18 07:06:54,717 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118,117 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 07:06:54,718 INFO L402 AbstractCegarLoop]: === Iteration 120 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 07:06:54,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 07:06:54,718 INFO L85 PathProgramCache]: Analyzing trace with hash -636482032, now seen corresponding path program 64 times [2022-01-18 07:06:54,718 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 07:06:54,718 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [668141328] [2022-01-18 07:06:54,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 07:06:54,718 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 07:06:54,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 07:06:54,932 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 07:06:54,932 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 07:06:54,933 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [668141328] [2022-01-18 07:06:54,933 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [668141328] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 07:06:54,933 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1950522357] [2022-01-18 07:06:54,933 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 07:06:54,933 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 07:06:54,933 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 07:06:54,934 INFO L229 MonitoredProcess]: Starting monitored process 118 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 07:06:54,934 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (118)] Waiting until timeout for monitored process [2022-01-18 07:06:54,955 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 07:06:54,955 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 07:06:54,956 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-18 07:06:54,956 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 07:06:55,373 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 07:06:55,377 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 07:06:55,377 INFO L387 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 109 treesize of output 83 [2022-01-18 07:06:55,680 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 07:06:55,680 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 07:06:55,969 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 07:06:55,982 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 07:06:55,982 INFO L387 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 211 treesize of output 169 [2022-01-18 07:06:58,679 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 07:06:58,679 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1950522357] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 07:06:58,679 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 07:06:58,679 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 24 [2022-01-18 07:06:58,679 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [700502953] [2022-01-18 07:06:58,679 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 07:06:58,679 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-18 07:06:58,680 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 07:06:58,680 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-18 07:06:58,680 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=453, Unknown=0, NotChecked=0, Total=552 [2022-01-18 07:06:58,680 INFO L87 Difference]: Start difference. First operand 4483 states and 16238 transitions. Second operand has 24 states, 24 states have (on average 2.5) internal successors, (60), 24 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 07:07:01,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 07:07:01,740 INFO L93 Difference]: Finished difference Result 7638 states and 26005 transitions. [2022-01-18 07:07:01,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-01-18 07:07:01,740 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.5) internal successors, (60), 24 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 26 [2022-01-18 07:07:01,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 07:07:01,754 INFO L225 Difference]: With dead ends: 7638 [2022-01-18 07:07:01,754 INFO L226 Difference]: Without dead ends: 7578 [2022-01-18 07:07:01,754 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 35 SyntacticMatches, 4 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1154 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=667, Invalid=3115, Unknown=0, NotChecked=0, Total=3782 [2022-01-18 07:07:01,754 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 286 mSDsluCounter, 640 mSDsCounter, 0 mSdLazyCounter, 1333 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 286 SdHoareTripleChecker+Valid, 432 SdHoareTripleChecker+Invalid, 2026 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 1333 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 647 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-18 07:07:01,754 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [286 Valid, 432 Invalid, 2026 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 1333 Invalid, 0 Unknown, 647 Unchecked, 0.8s Time] [2022-01-18 07:07:01,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7578 states. [2022-01-18 07:07:01,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7578 to 4603. [2022-01-18 07:07:01,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4603 states, 4602 states have (on average 3.6275532377227293) internal successors, (16694), 4602 states have internal predecessors, (16694), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 07:07:01,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4603 states to 4603 states and 16694 transitions. [2022-01-18 07:07:01,833 INFO L78 Accepts]: Start accepts. Automaton has 4603 states and 16694 transitions. Word has length 26 [2022-01-18 07:07:01,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 07:07:01,833 INFO L470 AbstractCegarLoop]: Abstraction has 4603 states and 16694 transitions. [2022-01-18 07:07:01,833 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.5) internal successors, (60), 24 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 07:07:01,833 INFO L276 IsEmpty]: Start isEmpty. Operand 4603 states and 16694 transitions. [2022-01-18 07:07:01,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 07:07:01,840 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 07:07:01,840 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 07:07:01,857 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (118)] Forceful destruction successful, exit code 0 [2022-01-18 07:07:02,048 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119,118 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 07:07:02,048 INFO L402 AbstractCegarLoop]: === Iteration 121 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 07:07:02,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 07:07:02,049 INFO L85 PathProgramCache]: Analyzing trace with hash -775305530, now seen corresponding path program 65 times [2022-01-18 07:07:02,049 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 07:07:02,049 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [71805480] [2022-01-18 07:07:02,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 07:07:02,049 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 07:07:02,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 07:07:02,352 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 07:07:02,352 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 07:07:02,352 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [71805480] [2022-01-18 07:07:02,352 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [71805480] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 07:07:02,352 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [918612336] [2022-01-18 07:07:02,352 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 07:07:02,352 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 07:07:02,353 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 07:07:02,353 INFO L229 MonitoredProcess]: Starting monitored process 119 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 07:07:02,354 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (119)] Waiting until timeout for monitored process [2022-01-18 07:07:02,375 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 07:07:02,375 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 07:07:02,375 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 23 conjunts are in the unsatisfiable core [2022-01-18 07:07:02,376 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 07:07:04,241 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 07:07:04,245 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 07:07:04,245 INFO L387 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 109 treesize of output 83 [2022-01-18 07:07:04,376 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 07:07:04,376 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 07:07:05,727 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 07:07:05,727 INFO L387 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 201 treesize of output 185 [2022-01-18 07:07:09,830 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 07:07:09,830 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [918612336] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 07:07:09,831 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 07:07:09,831 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 26 [2022-01-18 07:07:09,831 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [567927851] [2022-01-18 07:07:09,831 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 07:07:09,831 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-18 07:07:09,831 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 07:07:09,831 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-18 07:07:09,831 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=552, Unknown=0, NotChecked=0, Total=650 [2022-01-18 07:07:09,831 INFO L87 Difference]: Start difference. First operand 4603 states and 16694 transitions. Second operand has 26 states, 26 states have (on average 2.423076923076923) internal successors, (63), 26 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) [2022-01-18 07:07:10,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 07:07:10,472 INFO L93 Difference]: Finished difference Result 6073 states and 21367 transitions. [2022-01-18 07:07:10,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-01-18 07:07:10,472 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.423076923076923) internal successors, (63), 26 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 26 [2022-01-18 07:07:10,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 07:07:10,483 INFO L225 Difference]: With dead ends: 6073 [2022-01-18 07:07:10,484 INFO L226 Difference]: Without dead ends: 6058 [2022-01-18 07:07:10,484 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 40 SyntacticMatches, 3 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 441 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=241, Invalid=1399, Unknown=0, NotChecked=0, Total=1640 [2022-01-18 07:07:10,484 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 107 mSDsluCounter, 605 mSDsCounter, 0 mSdLazyCounter, 434 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 427 SdHoareTripleChecker+Invalid, 862 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 434 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 412 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 07:07:10,484 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [107 Valid, 427 Invalid, 862 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 434 Invalid, 0 Unknown, 412 Unchecked, 0.2s Time] [2022-01-18 07:07:10,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6058 states. [2022-01-18 07:07:10,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6058 to 4603. [2022-01-18 07:07:10,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4603 states, 4602 states have (on average 3.6275532377227293) internal successors, (16694), 4602 states have internal predecessors, (16694), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 07:07:10,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4603 states to 4603 states and 16694 transitions. [2022-01-18 07:07:10,561 INFO L78 Accepts]: Start accepts. Automaton has 4603 states and 16694 transitions. Word has length 26 [2022-01-18 07:07:10,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 07:07:10,561 INFO L470 AbstractCegarLoop]: Abstraction has 4603 states and 16694 transitions. [2022-01-18 07:07:10,561 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.423076923076923) internal successors, (63), 26 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) [2022-01-18 07:07:10,562 INFO L276 IsEmpty]: Start isEmpty. Operand 4603 states and 16694 transitions. [2022-01-18 07:07:10,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 07:07:10,569 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 07:07:10,569 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 07:07:10,585 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (119)] Forceful destruction successful, exit code 0 [2022-01-18 07:07:10,784 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120,119 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 07:07:10,784 INFO L402 AbstractCegarLoop]: === Iteration 122 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 07:07:10,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 07:07:10,784 INFO L85 PathProgramCache]: Analyzing trace with hash -969474032, now seen corresponding path program 54 times [2022-01-18 07:07:10,785 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 07:07:10,785 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1622214973] [2022-01-18 07:07:10,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 07:07:10,785 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 07:07:10,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 07:07:11,017 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 07:07:11,017 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 07:07:11,017 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1622214973] [2022-01-18 07:07:11,018 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1622214973] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 07:07:11,018 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1610503811] [2022-01-18 07:07:11,018 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 07:07:11,018 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 07:07:11,018 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 07:07:11,019 INFO L229 MonitoredProcess]: Starting monitored process 120 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 07:07:11,019 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (120)] Waiting until timeout for monitored process [2022-01-18 07:07:11,038 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 07:07:11,038 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 07:07:11,038 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2022-01-18 07:07:11,039 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 07:07:11,426 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 07:07:11,426 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 07:07:11,426 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 07:07:11,429 INFO L387 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 119 treesize of output 75 [2022-01-18 07:07:11,508 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 07:07:11,508 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 07:07:11,870 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 07:07:11,871 INFO L387 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 211 treesize of output 149 [2022-01-18 07:07:12,436 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 07:07:12,436 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1610503811] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 07:07:12,436 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 07:07:12,436 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 9] total 24 [2022-01-18 07:07:12,436 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [437571361] [2022-01-18 07:07:12,436 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 07:07:12,436 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-18 07:07:12,436 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 07:07:12,437 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-18 07:07:12,437 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=508, Unknown=0, NotChecked=0, Total=600 [2022-01-18 07:07:12,437 INFO L87 Difference]: Start difference. First operand 4603 states and 16694 transitions. Second operand has 25 states, 25 states have (on average 2.6) internal successors, (65), 24 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) [2022-01-18 07:07:15,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 07:07:15,960 INFO L93 Difference]: Finished difference Result 6889 states and 24045 transitions. [2022-01-18 07:07:15,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2022-01-18 07:07:15,960 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.6) internal successors, (65), 24 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 26 [2022-01-18 07:07:15,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 07:07:15,972 INFO L225 Difference]: With dead ends: 6889 [2022-01-18 07:07:15,972 INFO L226 Difference]: Without dead ends: 6859 [2022-01-18 07:07:15,973 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1993 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=892, Invalid=5428, Unknown=0, NotChecked=0, Total=6320 [2022-01-18 07:07:15,973 INFO L933 BasicCegarLoop]: 45 mSDtfsCounter, 217 mSDsluCounter, 852 mSDsCounter, 0 mSdLazyCounter, 1879 mSolverCounterSat, 73 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 217 SdHoareTripleChecker+Valid, 596 SdHoareTripleChecker+Invalid, 2527 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 1879 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 575 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-18 07:07:15,973 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [217 Valid, 596 Invalid, 2527 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 1879 Invalid, 0 Unknown, 575 Unchecked, 0.8s Time] [2022-01-18 07:07:15,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6859 states. [2022-01-18 07:07:16,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6859 to 4607. [2022-01-18 07:07:16,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4607 states, 4606 states have (on average 3.6265740338688666) internal successors, (16704), 4606 states have internal predecessors, (16704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 07:07:16,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4607 states to 4607 states and 16704 transitions. [2022-01-18 07:07:16,046 INFO L78 Accepts]: Start accepts. Automaton has 4607 states and 16704 transitions. Word has length 26 [2022-01-18 07:07:16,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 07:07:16,047 INFO L470 AbstractCegarLoop]: Abstraction has 4607 states and 16704 transitions. [2022-01-18 07:07:16,047 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.6) internal successors, (65), 24 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) [2022-01-18 07:07:16,047 INFO L276 IsEmpty]: Start isEmpty. Operand 4607 states and 16704 transitions. [2022-01-18 07:07:16,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 07:07:16,053 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 07:07:16,054 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 07:07:16,077 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (120)] Forceful destruction successful, exit code 0 [2022-01-18 07:07:16,269 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121,120 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 07:07:16,269 INFO L402 AbstractCegarLoop]: === Iteration 123 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 07:07:16,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 07:07:16,269 INFO L85 PathProgramCache]: Analyzing trace with hash -943378800, now seen corresponding path program 55 times [2022-01-18 07:07:16,270 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 07:07:16,270 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1745185759] [2022-01-18 07:07:16,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 07:07:16,270 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 07:07:16,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 07:07:16,474 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 07:07:16,475 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 07:07:16,475 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1745185759] [2022-01-18 07:07:16,475 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1745185759] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 07:07:16,475 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1361508517] [2022-01-18 07:07:16,475 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 07:07:16,475 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 07:07:16,475 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 07:07:16,476 INFO L229 MonitoredProcess]: Starting monitored process 121 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 07:07:16,476 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (121)] Waiting until timeout for monitored process [2022-01-18 07:07:16,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 07:07:16,498 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-18 07:07:16,498 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 07:07:16,991 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 07:07:16,992 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 07:07:17,003 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 07:07:17,003 INFO L387 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 119 treesize of output 103 [2022-01-18 07:07:17,456 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 07:07:17,456 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 07:07:17,731 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 07:07:17,731 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 07:07:17,731 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 07:07:17,740 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 07:07:17,740 INFO L387 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 211 treesize of output 143 [2022-01-18 07:07:17,965 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 07:07:17,965 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1361508517] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 07:07:17,965 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 07:07:17,965 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-01-18 07:07:17,965 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [505935477] [2022-01-18 07:07:17,965 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 07:07:17,965 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-18 07:07:17,966 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 07:07:17,966 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-18 07:07:17,966 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=418, Unknown=0, NotChecked=0, Total=506 [2022-01-18 07:07:17,966 INFO L87 Difference]: Start difference. First operand 4607 states and 16704 transitions. Second operand has 23 states, 23 states have (on average 2.5652173913043477) internal successors, (59), 22 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 07:07:19,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 07:07:19,778 INFO L93 Difference]: Finished difference Result 6744 states and 23385 transitions. [2022-01-18 07:07:19,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-01-18 07:07:19,778 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.5652173913043477) internal successors, (59), 22 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 26 [2022-01-18 07:07:19,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 07:07:19,793 INFO L225 Difference]: With dead ends: 6744 [2022-01-18 07:07:19,793 INFO L226 Difference]: Without dead ends: 6677 [2022-01-18 07:07:19,793 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 36 SyntacticMatches, 4 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 902 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=566, Invalid=2626, Unknown=0, NotChecked=0, Total=3192 [2022-01-18 07:07:19,793 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 216 mSDsluCounter, 551 mSDsCounter, 0 mSdLazyCounter, 1154 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 216 SdHoareTripleChecker+Valid, 383 SdHoareTripleChecker+Invalid, 1509 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 1154 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 318 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 07:07:19,794 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [216 Valid, 383 Invalid, 1509 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 1154 Invalid, 0 Unknown, 318 Unchecked, 0.5s Time] [2022-01-18 07:07:19,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6677 states. [2022-01-18 07:07:19,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6677 to 4732. [2022-01-18 07:07:19,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4732 states, 4731 states have (on average 3.6273515113083916) internal successors, (17161), 4731 states have internal predecessors, (17161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 07:07:19,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4732 states to 4732 states and 17161 transitions. [2022-01-18 07:07:19,878 INFO L78 Accepts]: Start accepts. Automaton has 4732 states and 17161 transitions. Word has length 26 [2022-01-18 07:07:19,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 07:07:19,878 INFO L470 AbstractCegarLoop]: Abstraction has 4732 states and 17161 transitions. [2022-01-18 07:07:19,878 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.5652173913043477) internal successors, (59), 22 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 07:07:19,878 INFO L276 IsEmpty]: Start isEmpty. Operand 4732 states and 17161 transitions. [2022-01-18 07:07:19,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 07:07:19,885 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 07:07:19,885 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 07:07:19,902 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (121)] Forceful destruction successful, exit code 0 [2022-01-18 07:07:20,099 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,SelfDestructingSolverStorable122 [2022-01-18 07:07:20,099 INFO L402 AbstractCegarLoop]: === Iteration 124 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 07:07:20,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 07:07:20,100 INFO L85 PathProgramCache]: Analyzing trace with hash 1527556992, now seen corresponding path program 66 times [2022-01-18 07:07:20,100 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 07:07:20,100 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1854011598] [2022-01-18 07:07:20,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 07:07:20,100 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 07:07:20,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 07:07:20,481 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 07:07:20,482 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 07:07:20,482 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1854011598] [2022-01-18 07:07:20,482 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1854011598] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 07:07:20,482 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [521918776] [2022-01-18 07:07:20,482 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 07:07:20,482 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 07:07:20,482 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 07:07:20,496 INFO L229 MonitoredProcess]: Starting monitored process 122 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 07:07:20,521 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (122)] Waiting until timeout for monitored process [2022-01-18 07:07:20,541 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-01-18 07:07:20,541 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 07:07:20,541 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2022-01-18 07:07:20,542 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 07:07:21,131 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 07:07:21,131 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 07:07:21,132 INFO L387 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 109 treesize of output 75 [2022-01-18 07:07:21,212 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 07:07:21,212 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 07:07:21,668 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 07:07:21,682 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 07:07:21,682 INFO L387 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 219 treesize of output 181 [2022-01-18 07:07:23,981 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 07:07:23,981 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [521918776] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 07:07:23,982 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 07:07:23,982 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 24 [2022-01-18 07:07:23,982 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [360553619] [2022-01-18 07:07:23,982 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 07:07:23,982 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-18 07:07:23,982 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 07:07:23,982 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-18 07:07:23,982 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=455, Unknown=0, NotChecked=0, Total=552 [2022-01-18 07:07:23,982 INFO L87 Difference]: Start difference. First operand 4732 states and 17161 transitions. Second operand has 24 states, 24 states have (on average 2.5833333333333335) internal successors, (62), 24 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 07:07:27,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 07:07:27,227 INFO L93 Difference]: Finished difference Result 7489 states and 25666 transitions. [2022-01-18 07:07:27,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-01-18 07:07:27,228 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.5833333333333335) internal successors, (62), 24 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 26 [2022-01-18 07:07:27,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 07:07:27,241 INFO L225 Difference]: With dead ends: 7489 [2022-01-18 07:07:27,241 INFO L226 Difference]: Without dead ends: 7459 [2022-01-18 07:07:27,241 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 34 SyntacticMatches, 5 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1080 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=563, Invalid=2859, Unknown=0, NotChecked=0, Total=3422 [2022-01-18 07:07:27,241 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 303 mSDsluCounter, 754 mSDsCounter, 0 mSdLazyCounter, 1477 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 303 SdHoareTripleChecker+Valid, 452 SdHoareTripleChecker+Invalid, 2016 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 1477 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 474 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-18 07:07:27,242 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [303 Valid, 452 Invalid, 2016 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 1477 Invalid, 0 Unknown, 474 Unchecked, 0.8s Time] [2022-01-18 07:07:27,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7459 states. [2022-01-18 07:07:27,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7459 to 4704. [2022-01-18 07:07:27,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4704 states, 4703 states have (on average 3.631724431214119) internal successors, (17080), 4703 states have internal predecessors, (17080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 07:07:27,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4704 states to 4704 states and 17080 transitions. [2022-01-18 07:07:27,335 INFO L78 Accepts]: Start accepts. Automaton has 4704 states and 17080 transitions. Word has length 26 [2022-01-18 07:07:27,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 07:07:27,335 INFO L470 AbstractCegarLoop]: Abstraction has 4704 states and 17080 transitions. [2022-01-18 07:07:27,336 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.5833333333333335) internal successors, (62), 24 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 07:07:27,336 INFO L276 IsEmpty]: Start isEmpty. Operand 4704 states and 17080 transitions. [2022-01-18 07:07:27,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-01-18 07:07:27,342 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 07:07:27,343 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 07:07:27,360 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (122)] Forceful destruction successful, exit code 0 [2022-01-18 07:07:27,555 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 122 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable123 [2022-01-18 07:07:27,555 INFO L402 AbstractCegarLoop]: === Iteration 125 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 07:07:27,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 07:07:27,556 INFO L85 PathProgramCache]: Analyzing trace with hash -1695376662, now seen corresponding path program 67 times [2022-01-18 07:07:27,556 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 07:07:27,556 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [139875083] [2022-01-18 07:07:27,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 07:07:27,556 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 07:07:27,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 07:07:27,596 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 07:07:27,596 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 07:07:27,596 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [139875083] [2022-01-18 07:07:27,596 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [139875083] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 07:07:27,596 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [328222479] [2022-01-18 07:07:27,596 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 07:07:27,597 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 07:07:27,597 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 07:07:27,597 INFO L229 MonitoredProcess]: Starting monitored process 123 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 07:07:27,598 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (123)] Waiting until timeout for monitored process [2022-01-18 07:07:27,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 07:07:27,624 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2022-01-18 07:07:27,624 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 07:07:27,738 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 07:07:27,739 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 07:07:27,851 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 07:07:27,851 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [328222479] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 07:07:27,851 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 07:07:27,852 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 21 [2022-01-18 07:07:27,852 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [34663066] [2022-01-18 07:07:27,852 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 07:07:27,852 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 07:07:27,852 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 07:07:27,852 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 07:07:27,852 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=337, Unknown=0, NotChecked=0, Total=420 [2022-01-18 07:07:27,852 INFO L87 Difference]: Start difference. First operand 4704 states and 17080 transitions. Second operand has 21 states, 21 states have (on average 2.9047619047619047) internal successors, (61), 21 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) [2022-01-18 07:07:30,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 07:07:30,099 INFO L93 Difference]: Finished difference Result 12235 states and 39529 transitions. [2022-01-18 07:07:30,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 155 states. [2022-01-18 07:07:30,099 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.9047619047619047) internal successors, (61), 21 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 28 [2022-01-18 07:07:30,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 07:07:30,124 INFO L225 Difference]: With dead ends: 12235 [2022-01-18 07:07:30,124 INFO L226 Difference]: Without dead ends: 12235 [2022-01-18 07:07:30,126 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 205 GetRequests, 43 SyntacticMatches, 2 SemanticMatches, 160 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11197 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=4782, Invalid=21300, Unknown=0, NotChecked=0, Total=26082 [2022-01-18 07:07:30,126 INFO L933 BasicCegarLoop]: 58 mSDtfsCounter, 667 mSDsluCounter, 1087 mSDsCounter, 0 mSdLazyCounter, 1938 mSolverCounterSat, 125 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 667 SdHoareTripleChecker+Valid, 693 SdHoareTripleChecker+Invalid, 2063 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 125 IncrementalHoareTripleChecker+Valid, 1938 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-18 07:07:30,126 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [667 Valid, 693 Invalid, 2063 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [125 Valid, 1938 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-18 07:07:30,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12235 states. [2022-01-18 07:07:30,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12235 to 5135. [2022-01-18 07:07:30,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5135 states, 5134 states have (on average 3.7010128554733153) internal successors, (19001), 5134 states have internal predecessors, (19001), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 07:07:30,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5135 states to 5135 states and 19001 transitions. [2022-01-18 07:07:30,274 INFO L78 Accepts]: Start accepts. Automaton has 5135 states and 19001 transitions. Word has length 28 [2022-01-18 07:07:30,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 07:07:30,274 INFO L470 AbstractCegarLoop]: Abstraction has 5135 states and 19001 transitions. [2022-01-18 07:07:30,274 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.9047619047619047) internal successors, (61), 21 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) [2022-01-18 07:07:30,274 INFO L276 IsEmpty]: Start isEmpty. Operand 5135 states and 19001 transitions. [2022-01-18 07:07:30,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-01-18 07:07:30,282 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 07:07:30,282 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 07:07:30,298 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (123)] Forceful destruction successful, exit code 0 [2022-01-18 07:07:30,498 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable124,123 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 07:07:30,498 INFO L402 AbstractCegarLoop]: === Iteration 126 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 07:07:30,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 07:07:30,498 INFO L85 PathProgramCache]: Analyzing trace with hash 1623271790, now seen corresponding path program 68 times [2022-01-18 07:07:30,498 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 07:07:30,498 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [19613194] [2022-01-18 07:07:30,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 07:07:30,498 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 07:07:30,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 07:07:30,534 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 07:07:30,534 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 07:07:30,534 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [19613194] [2022-01-18 07:07:30,534 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [19613194] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 07:07:30,534 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1697309694] [2022-01-18 07:07:30,534 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 07:07:30,534 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 07:07:30,534 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 07:07:30,535 INFO L229 MonitoredProcess]: Starting monitored process 124 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 07:07:30,535 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (124)] Waiting until timeout for monitored process [2022-01-18 07:07:30,553 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 07:07:30,553 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 07:07:30,554 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2022-01-18 07:07:30,554 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 07:07:30,633 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 07:07:30,633 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 07:07:30,714 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 07:07:30,715 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1697309694] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 07:07:30,715 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 07:07:30,715 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 23 [2022-01-18 07:07:30,715 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [161705298] [2022-01-18 07:07:30,715 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 07:07:30,715 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-18 07:07:30,715 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 07:07:30,715 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-18 07:07:30,715 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=406, Unknown=0, NotChecked=0, Total=506 [2022-01-18 07:07:30,715 INFO L87 Difference]: Start difference. First operand 5135 states and 19001 transitions. Second operand has 23 states, 23 states have (on average 2.8260869565217392) internal successors, (65), 23 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) [2022-01-18 07:07:35,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 07:07:35,596 INFO L93 Difference]: Finished difference Result 16561 states and 52832 transitions. [2022-01-18 07:07:35,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 263 states. [2022-01-18 07:07:35,597 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.8260869565217392) internal successors, (65), 23 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 28 [2022-01-18 07:07:35,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 07:07:35,628 INFO L225 Difference]: With dead ends: 16561 [2022-01-18 07:07:35,629 INFO L226 Difference]: Without dead ends: 16561 [2022-01-18 07:07:35,634 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 315 GetRequests, 41 SyntacticMatches, 2 SemanticMatches, 272 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33756 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=12551, Invalid=62251, Unknown=0, NotChecked=0, Total=74802 [2022-01-18 07:07:35,635 INFO L933 BasicCegarLoop]: 56 mSDtfsCounter, 1135 mSDsluCounter, 1204 mSDsCounter, 0 mSdLazyCounter, 2234 mSolverCounterSat, 202 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1135 SdHoareTripleChecker+Valid, 741 SdHoareTripleChecker+Invalid, 2436 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 202 IncrementalHoareTripleChecker+Valid, 2234 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-01-18 07:07:35,635 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1135 Valid, 741 Invalid, 2436 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [202 Valid, 2234 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-01-18 07:07:35,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16561 states. [2022-01-18 07:07:35,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16561 to 5210. [2022-01-18 07:07:35,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5210 states, 5209 states have (on average 3.713956613553465) internal successors, (19346), 5209 states have internal predecessors, (19346), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 07:07:35,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5210 states to 5210 states and 19346 transitions. [2022-01-18 07:07:35,803 INFO L78 Accepts]: Start accepts. Automaton has 5210 states and 19346 transitions. Word has length 28 [2022-01-18 07:07:35,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 07:07:35,803 INFO L470 AbstractCegarLoop]: Abstraction has 5210 states and 19346 transitions. [2022-01-18 07:07:35,803 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.8260869565217392) internal successors, (65), 23 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) [2022-01-18 07:07:35,803 INFO L276 IsEmpty]: Start isEmpty. Operand 5210 states and 19346 transitions. [2022-01-18 07:07:35,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-01-18 07:07:35,810 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 07:07:35,810 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 07:07:35,828 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (124)] Forceful destruction successful, exit code 0 [2022-01-18 07:07:36,025 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 124 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable125 [2022-01-18 07:07:36,025 INFO L402 AbstractCegarLoop]: === Iteration 127 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 07:07:36,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 07:07:36,025 INFO L85 PathProgramCache]: Analyzing trace with hash -2104743426, now seen corresponding path program 69 times [2022-01-18 07:07:36,025 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 07:07:36,025 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [240224644] [2022-01-18 07:07:36,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 07:07:36,025 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 07:07:36,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 07:07:36,062 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 07:07:36,062 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 07:07:36,062 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [240224644] [2022-01-18 07:07:36,062 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [240224644] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 07:07:36,062 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [371575935] [2022-01-18 07:07:36,062 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 07:07:36,062 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 07:07:36,062 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 07:07:36,063 INFO L229 MonitoredProcess]: Starting monitored process 125 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 07:07:36,066 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (125)] Waiting until timeout for monitored process [2022-01-18 07:07:36,087 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-01-18 07:07:36,087 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 07:07:36,087 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2022-01-18 07:07:36,088 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 07:07:36,169 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 07:07:36,169 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 07:07:36,253 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 07:07:36,253 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [371575935] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 07:07:36,253 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 07:07:36,253 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 23 [2022-01-18 07:07:36,253 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [263565926] [2022-01-18 07:07:36,253 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 07:07:36,253 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-18 07:07:36,253 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 07:07:36,253 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-18 07:07:36,253 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=405, Unknown=0, NotChecked=0, Total=506 [2022-01-18 07:07:36,254 INFO L87 Difference]: Start difference. First operand 5210 states and 19346 transitions. Second operand has 23 states, 23 states have (on average 2.8260869565217392) internal successors, (65), 23 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) [2022-01-18 07:07:38,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 07:07:38,930 INFO L93 Difference]: Finished difference Result 15109 states and 48587 transitions. [2022-01-18 07:07:38,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 185 states. [2022-01-18 07:07:38,931 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.8260869565217392) internal successors, (65), 23 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 28 [2022-01-18 07:07:38,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 07:07:38,960 INFO L225 Difference]: With dead ends: 15109 [2022-01-18 07:07:38,960 INFO L226 Difference]: Without dead ends: 15109 [2022-01-18 07:07:38,964 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 235 GetRequests, 41 SyntacticMatches, 2 SemanticMatches, 192 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16369 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=6947, Invalid=30495, Unknown=0, NotChecked=0, Total=37442 [2022-01-18 07:07:38,964 INFO L933 BasicCegarLoop]: 61 mSDtfsCounter, 823 mSDsluCounter, 1381 mSDsCounter, 0 mSdLazyCounter, 2320 mSolverCounterSat, 165 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 823 SdHoareTripleChecker+Valid, 819 SdHoareTripleChecker+Invalid, 2485 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 165 IncrementalHoareTripleChecker+Valid, 2320 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-18 07:07:38,964 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [823 Valid, 819 Invalid, 2485 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [165 Valid, 2320 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-18 07:07:38,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15109 states. [2022-01-18 07:07:39,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15109 to 5072. [2022-01-18 07:07:39,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5072 states, 5071 states have (on average 3.6888187734174718) internal successors, (18706), 5071 states have internal predecessors, (18706), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 07:07:39,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5072 states to 5072 states and 18706 transitions. [2022-01-18 07:07:39,121 INFO L78 Accepts]: Start accepts. Automaton has 5072 states and 18706 transitions. Word has length 28 [2022-01-18 07:07:39,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 07:07:39,121 INFO L470 AbstractCegarLoop]: Abstraction has 5072 states and 18706 transitions. [2022-01-18 07:07:39,121 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.8260869565217392) internal successors, (65), 23 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) [2022-01-18 07:07:39,121 INFO L276 IsEmpty]: Start isEmpty. Operand 5072 states and 18706 transitions. [2022-01-18 07:07:39,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-01-18 07:07:39,128 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 07:07:39,128 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 07:07:39,145 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (125)] Forceful destruction successful, exit code 0 [2022-01-18 07:07:39,343 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 125 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable126 [2022-01-18 07:07:39,343 INFO L402 AbstractCegarLoop]: === Iteration 128 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 07:07:39,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 07:07:39,343 INFO L85 PathProgramCache]: Analyzing trace with hash -2132345370, now seen corresponding path program 56 times [2022-01-18 07:07:39,345 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 07:07:39,345 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1257426245] [2022-01-18 07:07:39,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 07:07:39,345 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 07:07:39,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 07:07:39,375 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 07:07:39,375 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 07:07:39,375 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1257426245] [2022-01-18 07:07:39,375 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1257426245] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 07:07:39,375 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [997141903] [2022-01-18 07:07:39,375 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 07:07:39,375 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 07:07:39,375 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 07:07:39,376 INFO L229 MonitoredProcess]: Starting monitored process 126 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 07:07:39,377 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (126)] Waiting until timeout for monitored process [2022-01-18 07:07:39,396 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 07:07:39,396 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 07:07:39,396 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2022-01-18 07:07:39,397 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 07:07:39,465 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 07:07:39,465 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 07:07:39,535 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 07:07:39,535 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [997141903] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 07:07:39,535 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 07:07:39,535 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 19 [2022-01-18 07:07:39,536 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1818087099] [2022-01-18 07:07:39,536 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 07:07:39,536 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-18 07:07:39,536 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 07:07:39,536 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-18 07:07:39,536 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=271, Unknown=0, NotChecked=0, Total=342 [2022-01-18 07:07:39,536 INFO L87 Difference]: Start difference. First operand 5072 states and 18706 transitions. Second operand has 19 states, 19 states have (on average 3.0) internal successors, (57), 19 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 07:07:40,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 07:07:40,743 INFO L93 Difference]: Finished difference Result 10751 states and 35542 transitions. [2022-01-18 07:07:40,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2022-01-18 07:07:40,743 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.0) internal successors, (57), 19 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-01-18 07:07:40,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 07:07:40,763 INFO L225 Difference]: With dead ends: 10751 [2022-01-18 07:07:40,763 INFO L226 Difference]: Without dead ends: 10751 [2022-01-18 07:07:40,766 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 45 SyntacticMatches, 2 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2962 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1577, Invalid=6795, Unknown=0, NotChecked=0, Total=8372 [2022-01-18 07:07:40,766 INFO L933 BasicCegarLoop]: 46 mSDtfsCounter, 443 mSDsluCounter, 810 mSDsCounter, 0 mSdLazyCounter, 1291 mSolverCounterSat, 90 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 443 SdHoareTripleChecker+Valid, 516 SdHoareTripleChecker+Invalid, 1381 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 90 IncrementalHoareTripleChecker+Valid, 1291 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 07:07:40,767 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [443 Valid, 516 Invalid, 1381 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [90 Valid, 1291 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-18 07:07:40,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10751 states. [2022-01-18 07:07:40,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10751 to 5108. [2022-01-18 07:07:40,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5108 states, 5107 states have (on average 3.6839631877814765) internal successors, (18814), 5107 states have internal predecessors, (18814), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 07:07:40,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5108 states to 5108 states and 18814 transitions. [2022-01-18 07:07:40,889 INFO L78 Accepts]: Start accepts. Automaton has 5108 states and 18814 transitions. Word has length 28 [2022-01-18 07:07:40,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 07:07:40,889 INFO L470 AbstractCegarLoop]: Abstraction has 5108 states and 18814 transitions. [2022-01-18 07:07:40,889 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.0) internal successors, (57), 19 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 07:07:40,889 INFO L276 IsEmpty]: Start isEmpty. Operand 5108 states and 18814 transitions. [2022-01-18 07:07:40,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-01-18 07:07:40,897 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 07:07:40,897 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 07:07:40,912 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (126)] Forceful destruction successful, exit code 0 [2022-01-18 07:07:41,108 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,SelfDestructingSolverStorable127 [2022-01-18 07:07:41,108 INFO L402 AbstractCegarLoop]: === Iteration 129 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 07:07:41,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 07:07:41,108 INFO L85 PathProgramCache]: Analyzing trace with hash -1464752888, now seen corresponding path program 70 times [2022-01-18 07:07:41,108 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 07:07:41,108 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1779830870] [2022-01-18 07:07:41,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 07:07:41,108 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 07:07:41,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 07:07:41,152 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 07:07:41,152 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 07:07:41,152 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1779830870] [2022-01-18 07:07:41,152 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1779830870] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 07:07:41,152 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [951324957] [2022-01-18 07:07:41,152 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 07:07:41,153 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 07:07:41,153 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 07:07:41,154 INFO L229 MonitoredProcess]: Starting monitored process 127 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 07:07:41,155 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (127)] Waiting until timeout for monitored process [2022-01-18 07:07:41,185 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 07:07:41,185 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 07:07:41,185 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2022-01-18 07:07:41,186 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 07:07:41,293 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 07:07:41,293 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 07:07:41,418 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 07:07:41,419 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [951324957] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 07:07:41,419 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 07:07:41,419 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 21 [2022-01-18 07:07:41,419 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [421983665] [2022-01-18 07:07:41,419 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 07:07:41,419 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 07:07:41,419 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 07:07:41,419 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 07:07:41,419 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=334, Unknown=0, NotChecked=0, Total=420 [2022-01-18 07:07:41,419 INFO L87 Difference]: Start difference. First operand 5108 states and 18814 transitions. Second operand has 21 states, 21 states have (on average 3.0) internal successors, (63), 21 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) [2022-01-18 07:07:43,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 07:07:43,802 INFO L93 Difference]: Finished difference Result 12573 states and 40424 transitions. [2022-01-18 07:07:43,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 151 states. [2022-01-18 07:07:43,802 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.0) internal successors, (63), 21 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 28 [2022-01-18 07:07:43,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 07:07:43,827 INFO L225 Difference]: With dead ends: 12573 [2022-01-18 07:07:43,827 INFO L226 Difference]: Without dead ends: 12573 [2022-01-18 07:07:43,894 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 43 SyntacticMatches, 2 SemanticMatches, 156 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10124 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=4362, Invalid=20444, Unknown=0, NotChecked=0, Total=24806 [2022-01-18 07:07:43,894 INFO L933 BasicCegarLoop]: 46 mSDtfsCounter, 697 mSDsluCounter, 1032 mSDsCounter, 0 mSdLazyCounter, 1920 mSolverCounterSat, 151 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 697 SdHoareTripleChecker+Valid, 581 SdHoareTripleChecker+Invalid, 2071 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 151 IncrementalHoareTripleChecker+Valid, 1920 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-18 07:07:43,895 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [697 Valid, 581 Invalid, 2071 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [151 Valid, 1920 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-18 07:07:43,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12573 states. [2022-01-18 07:07:44,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12573 to 5097. [2022-01-18 07:07:44,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5097 states, 5096 states have (on average 3.6805337519623236) internal successors, (18756), 5096 states have internal predecessors, (18756), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 07:07:44,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5097 states to 5097 states and 18756 transitions. [2022-01-18 07:07:44,017 INFO L78 Accepts]: Start accepts. Automaton has 5097 states and 18756 transitions. Word has length 28 [2022-01-18 07:07:44,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 07:07:44,017 INFO L470 AbstractCegarLoop]: Abstraction has 5097 states and 18756 transitions. [2022-01-18 07:07:44,017 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.0) internal successors, (63), 21 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) [2022-01-18 07:07:44,017 INFO L276 IsEmpty]: Start isEmpty. Operand 5097 states and 18756 transitions. [2022-01-18 07:07:44,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-01-18 07:07:44,024 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 07:07:44,024 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 07:07:44,040 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (127)] Forceful destruction successful, exit code 0 [2022-01-18 07:07:44,239 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,SelfDestructingSolverStorable128 [2022-01-18 07:07:44,239 INFO L402 AbstractCegarLoop]: === Iteration 130 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 07:07:44,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 07:07:44,240 INFO L85 PathProgramCache]: Analyzing trace with hash 1584284586, now seen corresponding path program 71 times [2022-01-18 07:07:44,240 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 07:07:44,240 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [949714738] [2022-01-18 07:07:44,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 07:07:44,240 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 07:07:44,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 07:07:44,279 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 07:07:44,279 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 07:07:44,279 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [949714738] [2022-01-18 07:07:44,280 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [949714738] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 07:07:44,280 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1705867185] [2022-01-18 07:07:44,280 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 07:07:44,280 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 07:07:44,280 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 07:07:44,285 INFO L229 MonitoredProcess]: Starting monitored process 128 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 07:07:44,286 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (128)] Waiting until timeout for monitored process [2022-01-18 07:07:44,306 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 07:07:44,306 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 07:07:44,306 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-18 07:07:44,307 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 07:07:44,398 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 07:07:44,398 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 07:07:44,468 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 07:07:44,468 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1705867185] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 07:07:44,468 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 07:07:44,468 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-01-18 07:07:44,468 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [340792632] [2022-01-18 07:07:44,468 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 07:07:44,469 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-18 07:07:44,469 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 07:07:44,469 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-18 07:07:44,469 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2022-01-18 07:07:44,469 INFO L87 Difference]: Start difference. First operand 5097 states and 18756 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) [2022-01-18 07:07:45,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 07:07:45,673 INFO L93 Difference]: Finished difference Result 11621 states and 39062 transitions. [2022-01-18 07:07:45,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 103 states. [2022-01-18 07:07:45,674 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 28 [2022-01-18 07:07:45,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 07:07:45,696 INFO L225 Difference]: With dead ends: 11621 [2022-01-18 07:07:45,696 INFO L226 Difference]: Without dead ends: 11571 [2022-01-18 07:07:45,697 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 45 SyntacticMatches, 2 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4599 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=2755, Invalid=8801, Unknown=0, NotChecked=0, Total=11556 [2022-01-18 07:07:45,697 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 565 mSDsluCounter, 445 mSDsCounter, 0 mSdLazyCounter, 956 mSolverCounterSat, 141 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 565 SdHoareTripleChecker+Valid, 263 SdHoareTripleChecker+Invalid, 1097 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 141 IncrementalHoareTripleChecker+Valid, 956 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 07:07:45,697 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [565 Valid, 263 Invalid, 1097 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [141 Valid, 956 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-18 07:07:45,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11571 states. [2022-01-18 07:07:45,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11571 to 6133. [2022-01-18 07:07:45,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6133 states, 6132 states have (on average 3.7909328114807566) internal successors, (23246), 6132 states have internal predecessors, (23246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 07:07:45,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6133 states to 6133 states and 23246 transitions. [2022-01-18 07:07:45,841 INFO L78 Accepts]: Start accepts. Automaton has 6133 states and 23246 transitions. Word has length 28 [2022-01-18 07:07:45,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 07:07:45,841 INFO L470 AbstractCegarLoop]: Abstraction has 6133 states and 23246 transitions. [2022-01-18 07:07:45,841 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) [2022-01-18 07:07:45,841 INFO L276 IsEmpty]: Start isEmpty. Operand 6133 states and 23246 transitions. [2022-01-18 07:07:45,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-01-18 07:07:45,852 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 07:07:45,852 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 07:07:45,869 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (128)] Forceful destruction successful, exit code 0 [2022-01-18 07:07:46,067 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable129,128 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 07:07:46,067 INFO L402 AbstractCegarLoop]: === Iteration 131 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 07:07:46,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 07:07:46,067 INFO L85 PathProgramCache]: Analyzing trace with hash -1730816090, now seen corresponding path program 57 times [2022-01-18 07:07:46,068 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 07:07:46,068 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [538372168] [2022-01-18 07:07:46,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 07:07:46,068 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 07:07:46,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 07:07:46,119 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 07:07:46,119 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 07:07:46,120 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [538372168] [2022-01-18 07:07:46,120 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [538372168] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 07:07:46,120 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1961310847] [2022-01-18 07:07:46,120 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 07:07:46,120 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 07:07:46,120 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 07:07:46,135 INFO L229 MonitoredProcess]: Starting monitored process 129 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 07:07:46,153 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (129)] Waiting until timeout for monitored process [2022-01-18 07:07:46,172 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-01-18 07:07:46,172 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 07:07:46,173 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2022-01-18 07:07:46,173 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 07:07:46,267 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 07:07:46,267 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 07:07:46,306 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 07:07:46,306 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1961310847] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 07:07:46,306 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 07:07:46,307 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-01-18 07:07:46,307 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1292097331] [2022-01-18 07:07:46,307 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 07:07:46,307 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-18 07:07:46,307 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 07:07:46,307 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-18 07:07:46,307 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=272, Unknown=0, NotChecked=0, Total=342 [2022-01-18 07:07:46,307 INFO L87 Difference]: Start difference. First operand 6133 states and 23246 transitions. Second operand has 19 states, 19 states have (on average 2.8947368421052633) internal successors, (55), 18 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 07:07:46,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 07:07:46,872 INFO L93 Difference]: Finished difference Result 10528 states and 37795 transitions. [2022-01-18 07:07:46,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-01-18 07:07:46,873 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.8947368421052633) internal successors, (55), 18 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-01-18 07:07:46,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 07:07:46,893 INFO L225 Difference]: With dead ends: 10528 [2022-01-18 07:07:46,893 INFO L226 Difference]: Without dead ends: 10412 [2022-01-18 07:07:46,893 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 45 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 640 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=579, Invalid=1773, Unknown=0, NotChecked=0, Total=2352 [2022-01-18 07:07:46,893 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 448 mSDsluCounter, 327 mSDsCounter, 0 mSdLazyCounter, 513 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 448 SdHoareTripleChecker+Valid, 173 SdHoareTripleChecker+Invalid, 566 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 513 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 07:07:46,893 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [448 Valid, 173 Invalid, 566 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 513 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 07:07:46,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10412 states. [2022-01-18 07:07:47,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10412 to 7299. [2022-01-18 07:07:47,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7299 states, 7298 states have (on average 3.8140586462044395) internal successors, (27835), 7298 states have internal predecessors, (27835), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 07:07:47,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7299 states to 7299 states and 27835 transitions. [2022-01-18 07:07:47,027 INFO L78 Accepts]: Start accepts. Automaton has 7299 states and 27835 transitions. Word has length 28 [2022-01-18 07:07:47,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 07:07:47,027 INFO L470 AbstractCegarLoop]: Abstraction has 7299 states and 27835 transitions. [2022-01-18 07:07:47,027 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.8947368421052633) internal successors, (55), 18 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 07:07:47,027 INFO L276 IsEmpty]: Start isEmpty. Operand 7299 states and 27835 transitions. [2022-01-18 07:07:47,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-01-18 07:07:47,039 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 07:07:47,039 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 07:07:47,055 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (129)] Forceful destruction successful, exit code 0 [2022-01-18 07:07:47,253 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130,129 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 07:07:47,253 INFO L402 AbstractCegarLoop]: === Iteration 132 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 07:07:47,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 07:07:47,254 INFO L85 PathProgramCache]: Analyzing trace with hash -1174593234, now seen corresponding path program 72 times [2022-01-18 07:07:47,254 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 07:07:47,254 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [228548450] [2022-01-18 07:07:47,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 07:07:47,254 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 07:07:47,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 07:07:47,292 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 07:07:47,292 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 07:07:47,292 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [228548450] [2022-01-18 07:07:47,292 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [228548450] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 07:07:47,292 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1349303178] [2022-01-18 07:07:47,292 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 07:07:47,292 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 07:07:47,292 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 07:07:47,293 INFO L229 MonitoredProcess]: Starting monitored process 130 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 07:07:47,294 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (130)] Waiting until timeout for monitored process [2022-01-18 07:07:47,314 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-01-18 07:07:47,314 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 07:07:47,314 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-18 07:07:47,315 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 07:07:47,420 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 07:07:47,420 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 07:07:47,529 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 07:07:47,529 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1349303178] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 07:07:47,529 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 07:07:47,529 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 20 [2022-01-18 07:07:47,529 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1212444497] [2022-01-18 07:07:47,529 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 07:07:47,529 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 07:07:47,529 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 07:07:47,530 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 07:07:47,530 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=296, Unknown=0, NotChecked=0, Total=380 [2022-01-18 07:07:47,530 INFO L87 Difference]: Start difference. First operand 7299 states and 27835 transitions. Second operand has 20 states, 20 states have (on average 2.85) internal successors, (57), 20 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 07:07:49,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 07:07:49,076 INFO L93 Difference]: Finished difference Result 13328 states and 45017 transitions. [2022-01-18 07:07:49,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2022-01-18 07:07:49,077 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.85) internal successors, (57), 20 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-01-18 07:07:49,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 07:07:49,103 INFO L225 Difference]: With dead ends: 13328 [2022-01-18 07:07:49,103 INFO L226 Difference]: Without dead ends: 13262 [2022-01-18 07:07:49,104 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 43 SyntacticMatches, 2 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4006 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=2636, Invalid=7870, Unknown=0, NotChecked=0, Total=10506 [2022-01-18 07:07:49,104 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 894 mSDsluCounter, 399 mSDsCounter, 0 mSdLazyCounter, 839 mSolverCounterSat, 205 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 894 SdHoareTripleChecker+Valid, 252 SdHoareTripleChecker+Invalid, 1044 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 205 IncrementalHoareTripleChecker+Valid, 839 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 07:07:49,105 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [894 Valid, 252 Invalid, 1044 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [205 Valid, 839 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-18 07:07:49,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13262 states. [2022-01-18 07:07:49,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13262 to 7351. [2022-01-18 07:07:49,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7351 states, 7350 states have (on average 3.812108843537415) internal successors, (28019), 7350 states have internal predecessors, (28019), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 07:07:49,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7351 states to 7351 states and 28019 transitions. [2022-01-18 07:07:49,289 INFO L78 Accepts]: Start accepts. Automaton has 7351 states and 28019 transitions. Word has length 28 [2022-01-18 07:07:49,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 07:07:49,290 INFO L470 AbstractCegarLoop]: Abstraction has 7351 states and 28019 transitions. [2022-01-18 07:07:49,290 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.85) internal successors, (57), 20 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 07:07:49,290 INFO L276 IsEmpty]: Start isEmpty. Operand 7351 states and 28019 transitions. [2022-01-18 07:07:49,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-01-18 07:07:49,301 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 07:07:49,301 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 07:07:49,320 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (130)] Forceful destruction successful, exit code 0 [2022-01-18 07:07:49,516 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,SelfDestructingSolverStorable131 [2022-01-18 07:07:49,516 INFO L402 AbstractCegarLoop]: === Iteration 133 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 07:07:49,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 07:07:49,516 INFO L85 PathProgramCache]: Analyzing trace with hash -502180452, now seen corresponding path program 73 times [2022-01-18 07:07:49,516 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 07:07:49,516 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1339998343] [2022-01-18 07:07:49,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 07:07:49,516 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 07:07:49,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 07:07:49,553 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 07:07:49,554 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 07:07:49,554 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1339998343] [2022-01-18 07:07:49,554 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1339998343] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 07:07:49,554 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1331036718] [2022-01-18 07:07:49,554 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 07:07:49,554 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 07:07:49,554 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 07:07:49,561 INFO L229 MonitoredProcess]: Starting monitored process 131 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 07:07:49,562 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (131)] Waiting until timeout for monitored process [2022-01-18 07:07:49,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 07:07:49,581 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-18 07:07:49,582 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 07:07:49,692 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 07:07:49,692 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 07:07:49,768 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 07:07:49,768 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1331036718] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 07:07:49,768 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 07:07:49,768 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 20 [2022-01-18 07:07:49,768 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [42285354] [2022-01-18 07:07:49,768 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 07:07:49,768 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 07:07:49,769 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 07:07:49,769 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 07:07:49,769 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=293, Unknown=0, NotChecked=0, Total=380 [2022-01-18 07:07:49,769 INFO L87 Difference]: Start difference. First operand 7351 states and 28019 transitions. Second operand has 20 states, 20 states have (on average 2.85) internal successors, (57), 20 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 07:07:50,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 07:07:50,754 INFO L93 Difference]: Finished difference Result 12104 states and 41519 transitions. [2022-01-18 07:07:50,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2022-01-18 07:07:50,755 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.85) internal successors, (57), 20 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-01-18 07:07:50,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 07:07:50,782 INFO L225 Difference]: With dead ends: 12104 [2022-01-18 07:07:50,782 INFO L226 Difference]: Without dead ends: 12007 [2022-01-18 07:07:50,783 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 43 SyntacticMatches, 2 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2666 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=2030, Invalid=5110, Unknown=0, NotChecked=0, Total=7140 [2022-01-18 07:07:50,783 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 589 mSDsluCounter, 406 mSDsCounter, 0 mSdLazyCounter, 931 mSolverCounterSat, 151 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 589 SdHoareTripleChecker+Valid, 250 SdHoareTripleChecker+Invalid, 1082 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 151 IncrementalHoareTripleChecker+Valid, 931 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 07:07:50,783 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [589 Valid, 250 Invalid, 1082 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [151 Valid, 931 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 07:07:50,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12007 states. [2022-01-18 07:07:50,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12007 to 7300. [2022-01-18 07:07:50,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7300 states, 7299 states have (on average 3.8177832579805453) internal successors, (27866), 7299 states have internal predecessors, (27866), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 07:07:50,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7300 states to 7300 states and 27866 transitions. [2022-01-18 07:07:50,974 INFO L78 Accepts]: Start accepts. Automaton has 7300 states and 27866 transitions. Word has length 28 [2022-01-18 07:07:50,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 07:07:50,975 INFO L470 AbstractCegarLoop]: Abstraction has 7300 states and 27866 transitions. [2022-01-18 07:07:50,975 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.85) internal successors, (57), 20 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 07:07:50,975 INFO L276 IsEmpty]: Start isEmpty. Operand 7300 states and 27866 transitions. [2022-01-18 07:07:50,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-01-18 07:07:50,987 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 07:07:50,987 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 07:07:51,003 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (131)] Ended with exit code 0 [2022-01-18 07:07:51,203 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132,131 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 07:07:51,203 INFO L402 AbstractCegarLoop]: === Iteration 134 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 07:07:51,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 07:07:51,204 INFO L85 PathProgramCache]: Analyzing trace with hash 1763655766, now seen corresponding path program 74 times [2022-01-18 07:07:51,204 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 07:07:51,204 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1092568589] [2022-01-18 07:07:51,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 07:07:51,204 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 07:07:51,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 07:07:51,225 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 07:07:51,225 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 07:07:51,225 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1092568589] [2022-01-18 07:07:51,225 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1092568589] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 07:07:51,225 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1881381659] [2022-01-18 07:07:51,225 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 07:07:51,225 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 07:07:51,225 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 07:07:51,226 INFO L229 MonitoredProcess]: Starting monitored process 132 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 07:07:51,227 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (132)] Waiting until timeout for monitored process [2022-01-18 07:07:51,246 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 07:07:51,247 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 07:07:51,247 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-18 07:07:51,247 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 07:07:51,330 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 07:07:51,330 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 07:07:51,404 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 07:07:51,404 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1881381659] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 07:07:51,404 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 07:07:51,404 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 14 [2022-01-18 07:07:51,404 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [533110419] [2022-01-18 07:07:51,404 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 07:07:51,404 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-01-18 07:07:51,404 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 07:07:51,405 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-01-18 07:07:51,405 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=117, Unknown=0, NotChecked=0, Total=182 [2022-01-18 07:07:51,405 INFO L87 Difference]: Start difference. First operand 7300 states and 27866 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) [2022-01-18 07:07:51,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 07:07:51,602 INFO L93 Difference]: Finished difference Result 9788 states and 35030 transitions. [2022-01-18 07:07:51,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-01-18 07:07:51,602 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 28 [2022-01-18 07:07:51,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 07:07:51,623 INFO L225 Difference]: With dead ends: 9788 [2022-01-18 07:07:51,623 INFO L226 Difference]: Without dead ends: 9681 [2022-01-18 07:07:51,624 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 48 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=210, Invalid=342, Unknown=0, NotChecked=0, Total=552 [2022-01-18 07:07:51,624 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 271 mSDsluCounter, 131 mSDsCounter, 0 mSdLazyCounter, 248 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 271 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 284 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 248 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 07:07:51,624 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [271 Valid, 66 Invalid, 284 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 248 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 07:07:51,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9681 states. [2022-01-18 07:07:51,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9681 to 7304. [2022-01-18 07:07:51,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7304 states, 7303 states have (on average 3.8092564699438585) internal successors, (27819), 7303 states have internal predecessors, (27819), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 07:07:51,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7304 states to 7304 states and 27819 transitions. [2022-01-18 07:07:51,771 INFO L78 Accepts]: Start accepts. Automaton has 7304 states and 27819 transitions. Word has length 28 [2022-01-18 07:07:51,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 07:07:51,771 INFO L470 AbstractCegarLoop]: Abstraction has 7304 states and 27819 transitions. [2022-01-18 07:07:51,771 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) [2022-01-18 07:07:51,771 INFO L276 IsEmpty]: Start isEmpty. Operand 7304 states and 27819 transitions. [2022-01-18 07:07:51,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-01-18 07:07:51,783 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 07:07:51,783 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 07:07:51,799 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (132)] Ended with exit code 0 [2022-01-18 07:07:51,987 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable133,132 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 07:07:51,987 INFO L402 AbstractCegarLoop]: === Iteration 135 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 07:07:51,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 07:07:51,988 INFO L85 PathProgramCache]: Analyzing trace with hash -1550979374, now seen corresponding path program 75 times [2022-01-18 07:07:51,988 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 07:07:51,988 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1403270043] [2022-01-18 07:07:51,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 07:07:51,988 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 07:07:51,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 07:07:52,025 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 07:07:52,025 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 07:07:52,025 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1403270043] [2022-01-18 07:07:52,025 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1403270043] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 07:07:52,025 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1631931343] [2022-01-18 07:07:52,025 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 07:07:52,025 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 07:07:52,025 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 07:07:52,027 INFO L229 MonitoredProcess]: Starting monitored process 133 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 07:07:52,028 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (133)] Waiting until timeout for monitored process [2022-01-18 07:07:52,048 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 07:07:52,048 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 07:07:52,048 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-18 07:07:52,049 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 07:07:52,134 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 07:07:52,135 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 07:07:52,223 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 07:07:52,223 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1631931343] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 07:07:52,223 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 07:07:52,223 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 16 [2022-01-18 07:07:52,223 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1948492176] [2022-01-18 07:07:52,223 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 07:07:52,223 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-18 07:07:52,223 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 07:07:52,224 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-18 07:07:52,224 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=176, Unknown=0, NotChecked=0, Total=240 [2022-01-18 07:07:52,224 INFO L87 Difference]: Start difference. First operand 7304 states and 27819 transitions. Second operand has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 07:07:53,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 07:07:53,162 INFO L93 Difference]: Finished difference Result 16226 states and 54409 transitions. [2022-01-18 07:07:53,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2022-01-18 07:07:53,162 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-01-18 07:07:53,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 07:07:53,197 INFO L225 Difference]: With dead ends: 16226 [2022-01-18 07:07:53,197 INFO L226 Difference]: Without dead ends: 16085 [2022-01-18 07:07:53,198 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 47 SyntacticMatches, 2 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2824 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1663, Invalid=5647, Unknown=0, NotChecked=0, Total=7310 [2022-01-18 07:07:53,198 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 592 mSDsluCounter, 464 mSDsCounter, 0 mSdLazyCounter, 948 mSolverCounterSat, 116 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 592 SdHoareTripleChecker+Valid, 245 SdHoareTripleChecker+Invalid, 1064 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 116 IncrementalHoareTripleChecker+Valid, 948 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 07:07:53,198 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [592 Valid, 245 Invalid, 1064 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [116 Valid, 948 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 07:07:53,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16085 states. [2022-01-18 07:07:53,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16085 to 7577. [2022-01-18 07:07:53,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7577 states, 7576 states have (on average 3.829857444561774) internal successors, (29015), 7576 states have internal predecessors, (29015), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 07:07:53,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7577 states to 7577 states and 29015 transitions. [2022-01-18 07:07:53,432 INFO L78 Accepts]: Start accepts. Automaton has 7577 states and 29015 transitions. Word has length 28 [2022-01-18 07:07:53,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 07:07:53,432 INFO L470 AbstractCegarLoop]: Abstraction has 7577 states and 29015 transitions. [2022-01-18 07:07:53,432 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 07:07:53,433 INFO L276 IsEmpty]: Start isEmpty. Operand 7577 states and 29015 transitions. [2022-01-18 07:07:53,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-01-18 07:07:53,445 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 07:07:53,445 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 07:07:53,460 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (133)] Forceful destruction successful, exit code 0 [2022-01-18 07:07:53,659 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,SelfDestructingSolverStorable134 [2022-01-18 07:07:53,659 INFO L402 AbstractCegarLoop]: === Iteration 136 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 07:07:53,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 07:07:53,659 INFO L85 PathProgramCache]: Analyzing trace with hash -1870087530, now seen corresponding path program 76 times [2022-01-18 07:07:53,660 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 07:07:53,660 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1612205413] [2022-01-18 07:07:53,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 07:07:53,660 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 07:07:53,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 07:07:53,683 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 07:07:53,683 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 07:07:53,683 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1612205413] [2022-01-18 07:07:53,683 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1612205413] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 07:07:53,683 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1379732263] [2022-01-18 07:07:53,683 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 07:07:53,684 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 07:07:53,684 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 07:07:53,684 INFO L229 MonitoredProcess]: Starting monitored process 134 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 07:07:53,685 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (134)] Waiting until timeout for monitored process [2022-01-18 07:07:53,702 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 07:07:53,702 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 07:07:53,702 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-18 07:07:53,703 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 07:07:53,768 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 07:07:53,769 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 07:07:53,858 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 07:07:53,858 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1379732263] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 07:07:53,858 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 07:07:53,858 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 8] total 14 [2022-01-18 07:07:53,858 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [779250169] [2022-01-18 07:07:53,858 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 07:07:53,858 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-01-18 07:07:53,858 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 07:07:53,858 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-01-18 07:07:53,858 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=117, Unknown=0, NotChecked=0, Total=182 [2022-01-18 07:07:53,858 INFO L87 Difference]: Start difference. First operand 7577 states and 29015 transitions. Second operand has 14 states, 14 states have (on average 3.7142857142857144) internal successors, (52), 14 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 07:07:54,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 07:07:54,246 INFO L93 Difference]: Finished difference Result 12486 states and 43455 transitions. [2022-01-18 07:07:54,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-01-18 07:07:54,246 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.7142857142857144) internal successors, (52), 14 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 28 [2022-01-18 07:07:54,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 07:07:54,271 INFO L225 Difference]: With dead ends: 12486 [2022-01-18 07:07:54,271 INFO L226 Difference]: Without dead ends: 12486 [2022-01-18 07:07:54,272 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 47 SyntacticMatches, 3 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 406 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=464, Invalid=868, Unknown=0, NotChecked=0, Total=1332 [2022-01-18 07:07:54,272 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 402 mSDsluCounter, 198 mSDsCounter, 0 mSdLazyCounter, 303 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 402 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 347 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 303 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 07:07:54,272 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [402 Valid, 102 Invalid, 347 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 303 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 07:07:54,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12486 states. [2022-01-18 07:07:54,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12486 to 7253. [2022-01-18 07:07:54,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7253 states, 7252 states have (on average 3.8084666298952015) internal successors, (27619), 7252 states have internal predecessors, (27619), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 07:07:54,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7253 states to 7253 states and 27619 transitions. [2022-01-18 07:07:54,425 INFO L78 Accepts]: Start accepts. Automaton has 7253 states and 27619 transitions. Word has length 28 [2022-01-18 07:07:54,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 07:07:54,425 INFO L470 AbstractCegarLoop]: Abstraction has 7253 states and 27619 transitions. [2022-01-18 07:07:54,425 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.7142857142857144) internal successors, (52), 14 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 07:07:54,426 INFO L276 IsEmpty]: Start isEmpty. Operand 7253 states and 27619 transitions. [2022-01-18 07:07:54,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-01-18 07:07:54,437 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 07:07:54,437 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 07:07:54,452 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (134)] Forceful destruction successful, exit code 0 [2022-01-18 07:07:54,651 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 134 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable135 [2022-01-18 07:07:54,651 INFO L402 AbstractCegarLoop]: === Iteration 137 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 07:07:54,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 07:07:54,651 INFO L85 PathProgramCache]: Analyzing trace with hash -813882188, now seen corresponding path program 77 times [2022-01-18 07:07:54,651 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 07:07:54,651 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1431556250] [2022-01-18 07:07:54,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 07:07:54,652 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 07:07:54,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 07:07:54,691 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 07:07:54,691 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 07:07:54,691 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1431556250] [2022-01-18 07:07:54,691 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1431556250] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 07:07:54,691 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [476053180] [2022-01-18 07:07:54,691 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 07:07:54,691 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 07:07:54,691 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 07:07:54,692 INFO L229 MonitoredProcess]: Starting monitored process 135 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 07:07:54,693 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (135)] Waiting until timeout for monitored process [2022-01-18 07:07:54,737 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-01-18 07:07:54,737 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 07:07:54,737 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2022-01-18 07:07:54,738 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 07:07:54,792 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 07:07:54,792 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 07:07:54,852 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 07:07:54,852 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [476053180] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 07:07:54,852 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 07:07:54,852 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 10] total 17 [2022-01-18 07:07:54,853 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [165372756] [2022-01-18 07:07:54,853 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 07:07:54,853 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-18 07:07:54,853 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 07:07:54,853 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-18 07:07:54,853 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=202, Unknown=0, NotChecked=0, Total=272 [2022-01-18 07:07:54,853 INFO L87 Difference]: Start difference. First operand 7253 states and 27619 transitions. Second operand has 17 states, 17 states have (on average 3.0) internal successors, (51), 17 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) [2022-01-18 07:07:56,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 07:07:56,126 INFO L93 Difference]: Finished difference Result 16426 states and 56150 transitions. [2022-01-18 07:07:56,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2022-01-18 07:07:56,127 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.0) internal successors, (51), 17 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 28 [2022-01-18 07:07:56,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 07:07:56,161 INFO L225 Difference]: With dead ends: 16426 [2022-01-18 07:07:56,161 INFO L226 Difference]: Without dead ends: 16426 [2022-01-18 07:07:56,162 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 47 SyntacticMatches, 2 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3069 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1779, Invalid=6231, Unknown=0, NotChecked=0, Total=8010 [2022-01-18 07:07:56,162 INFO L933 BasicCegarLoop]: 43 mSDtfsCounter, 509 mSDsluCounter, 583 mSDsCounter, 0 mSdLazyCounter, 1030 mSolverCounterSat, 103 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 509 SdHoareTripleChecker+Valid, 385 SdHoareTripleChecker+Invalid, 1133 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 103 IncrementalHoareTripleChecker+Valid, 1030 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 07:07:56,162 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [509 Valid, 385 Invalid, 1133 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [103 Valid, 1030 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-18 07:07:56,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16426 states. [2022-01-18 07:07:56,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16426 to 7363. [2022-01-18 07:07:56,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7363 states, 7362 states have (on average 3.815131757674545) internal successors, (28087), 7362 states have internal predecessors, (28087), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 07:07:56,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7363 states to 7363 states and 28087 transitions. [2022-01-18 07:07:56,369 INFO L78 Accepts]: Start accepts. Automaton has 7363 states and 28087 transitions. Word has length 28 [2022-01-18 07:07:56,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 07:07:56,369 INFO L470 AbstractCegarLoop]: Abstraction has 7363 states and 28087 transitions. [2022-01-18 07:07:56,369 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.0) internal successors, (51), 17 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) [2022-01-18 07:07:56,370 INFO L276 IsEmpty]: Start isEmpty. Operand 7363 states and 28087 transitions. [2022-01-18 07:07:56,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-01-18 07:07:56,381 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 07:07:56,381 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 07:07:56,396 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (135)] Forceful destruction successful, exit code 0 [2022-01-18 07:07:56,595 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 135 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable136 [2022-01-18 07:07:56,595 INFO L402 AbstractCegarLoop]: === Iteration 138 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 07:07:56,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 07:07:56,596 INFO L85 PathProgramCache]: Analyzing trace with hash -28968094, now seen corresponding path program 78 times [2022-01-18 07:07:56,596 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 07:07:56,596 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [641266127] [2022-01-18 07:07:56,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 07:07:56,596 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 07:07:56,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 07:07:56,638 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 07:07:56,638 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 07:07:56,638 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [641266127] [2022-01-18 07:07:56,638 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [641266127] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 07:07:56,638 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [703174848] [2022-01-18 07:07:56,638 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 07:07:56,638 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 07:07:56,638 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 07:07:56,639 INFO L229 MonitoredProcess]: Starting monitored process 136 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 07:07:56,640 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (136)] Waiting until timeout for monitored process [2022-01-18 07:07:56,660 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-01-18 07:07:56,660 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 07:07:56,660 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2022-01-18 07:07:56,661 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 07:07:56,752 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 07:07:56,752 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 07:07:56,849 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 07:07:56,849 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [703174848] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 07:07:56,849 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 07:07:56,849 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 10] total 17 [2022-01-18 07:07:56,849 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [128565540] [2022-01-18 07:07:56,849 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 07:07:56,849 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-18 07:07:56,849 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 07:07:56,849 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-18 07:07:56,849 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=200, Unknown=0, NotChecked=0, Total=272 [2022-01-18 07:07:56,849 INFO L87 Difference]: Start difference. First operand 7363 states and 28087 transitions. Second operand has 17 states, 17 states have (on average 3.0) internal successors, (51), 17 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) [2022-01-18 07:07:58,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 07:07:58,125 INFO L93 Difference]: Finished difference Result 16431 states and 56503 transitions. [2022-01-18 07:07:58,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2022-01-18 07:07:58,126 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.0) internal successors, (51), 17 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 28 [2022-01-18 07:07:58,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 07:07:58,160 INFO L225 Difference]: With dead ends: 16431 [2022-01-18 07:07:58,160 INFO L226 Difference]: Without dead ends: 16431 [2022-01-18 07:07:58,161 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 47 SyntacticMatches, 2 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2780 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1581, Invalid=5901, Unknown=0, NotChecked=0, Total=7482 [2022-01-18 07:07:58,161 INFO L933 BasicCegarLoop]: 48 mSDtfsCounter, 499 mSDsluCounter, 602 mSDsCounter, 0 mSdLazyCounter, 1070 mSolverCounterSat, 114 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 499 SdHoareTripleChecker+Valid, 405 SdHoareTripleChecker+Invalid, 1184 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 114 IncrementalHoareTripleChecker+Valid, 1070 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 07:07:58,162 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [499 Valid, 405 Invalid, 1184 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [114 Valid, 1070 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-18 07:07:58,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16431 states. [2022-01-18 07:07:58,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16431 to 7501. [2022-01-18 07:07:58,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7501 states, 7500 states have (on average 3.8056) internal successors, (28542), 7500 states have internal predecessors, (28542), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 07:07:58,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7501 states to 7501 states and 28542 transitions. [2022-01-18 07:07:58,394 INFO L78 Accepts]: Start accepts. Automaton has 7501 states and 28542 transitions. Word has length 28 [2022-01-18 07:07:58,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 07:07:58,395 INFO L470 AbstractCegarLoop]: Abstraction has 7501 states and 28542 transitions. [2022-01-18 07:07:58,395 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.0) internal successors, (51), 17 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) [2022-01-18 07:07:58,395 INFO L276 IsEmpty]: Start isEmpty. Operand 7501 states and 28542 transitions. [2022-01-18 07:07:58,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-01-18 07:07:58,406 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 07:07:58,406 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 07:07:58,423 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (136)] Forceful destruction successful, exit code 0 [2022-01-18 07:07:58,621 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable137,136 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 07:07:58,621 INFO L402 AbstractCegarLoop]: === Iteration 139 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 07:07:58,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 07:07:58,622 INFO L85 PathProgramCache]: Analyzing trace with hash -1111990750, now seen corresponding path program 79 times [2022-01-18 07:07:58,622 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 07:07:58,622 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1705096761] [2022-01-18 07:07:58,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 07:07:58,622 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 07:07:58,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 07:07:58,700 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 07:07:58,700 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 07:07:58,700 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1705096761] [2022-01-18 07:07:58,700 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1705096761] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 07:07:58,700 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1834732106] [2022-01-18 07:07:58,700 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 07:07:58,700 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 07:07:58,701 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 07:07:58,701 INFO L229 MonitoredProcess]: Starting monitored process 137 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 07:07:58,707 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (137)] Waiting until timeout for monitored process [2022-01-18 07:07:58,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 07:07:58,727 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-18 07:07:58,727 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 07:07:58,823 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 07:07:58,823 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 07:07:58,905 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 07:07:58,906 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1834732106] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 07:07:58,906 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 07:07:58,906 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 16 [2022-01-18 07:07:58,906 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [132039432] [2022-01-18 07:07:58,906 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 07:07:58,906 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-18 07:07:58,906 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 07:07:58,906 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-18 07:07:58,906 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2022-01-18 07:07:58,906 INFO L87 Difference]: Start difference. First operand 7501 states and 28542 transitions. Second operand has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 07:08:00,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 07:08:00,009 INFO L93 Difference]: Finished difference Result 18688 states and 62579 transitions. [2022-01-18 07:08:00,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2022-01-18 07:08:00,009 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-01-18 07:08:00,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 07:08:00,051 INFO L225 Difference]: With dead ends: 18688 [2022-01-18 07:08:00,052 INFO L226 Difference]: Without dead ends: 18632 [2022-01-18 07:08:00,053 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 47 SyntacticMatches, 2 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3061 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1800, Invalid=5856, Unknown=0, NotChecked=0, Total=7656 [2022-01-18 07:08:00,053 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 606 mSDsluCounter, 456 mSDsCounter, 0 mSdLazyCounter, 872 mSolverCounterSat, 144 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 606 SdHoareTripleChecker+Valid, 266 SdHoareTripleChecker+Invalid, 1016 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 144 IncrementalHoareTripleChecker+Valid, 872 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 07:08:00,053 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [606 Valid, 266 Invalid, 1016 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [144 Valid, 872 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-18 07:08:00,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18632 states. [2022-01-18 07:08:00,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18632 to 8880. [2022-01-18 07:08:00,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8880 states, 8879 states have (on average 3.849983106205654) internal successors, (34184), 8879 states have internal predecessors, (34184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 07:08:00,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8880 states to 8880 states and 34184 transitions. [2022-01-18 07:08:00,404 INFO L78 Accepts]: Start accepts. Automaton has 8880 states and 34184 transitions. Word has length 28 [2022-01-18 07:08:00,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 07:08:00,404 INFO L470 AbstractCegarLoop]: Abstraction has 8880 states and 34184 transitions. [2022-01-18 07:08:00,404 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 07:08:00,405 INFO L276 IsEmpty]: Start isEmpty. Operand 8880 states and 34184 transitions. [2022-01-18 07:08:00,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-01-18 07:08:00,418 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 07:08:00,418 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 07:08:00,436 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (137)] Forceful destruction successful, exit code 0 [2022-01-18 07:08:00,634 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 137 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable138 [2022-01-18 07:08:00,634 INFO L402 AbstractCegarLoop]: === Iteration 140 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 07:08:00,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 07:08:00,634 INFO L85 PathProgramCache]: Analyzing trace with hash 359087368, now seen corresponding path program 80 times [2022-01-18 07:08:00,634 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 07:08:00,634 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [449068160] [2022-01-18 07:08:00,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 07:08:00,634 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 07:08:00,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 07:08:00,658 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 07:08:00,658 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 07:08:00,658 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [449068160] [2022-01-18 07:08:00,658 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [449068160] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 07:08:00,658 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [431000128] [2022-01-18 07:08:00,658 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 07:08:00,658 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 07:08:00,658 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 07:08:00,659 INFO L229 MonitoredProcess]: Starting monitored process 138 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 07:08:00,660 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (138)] Waiting until timeout for monitored process [2022-01-18 07:08:00,680 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 07:08:00,680 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 07:08:00,680 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-18 07:08:00,680 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 07:08:00,732 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 07:08:00,732 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 07:08:00,782 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 07:08:00,782 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [431000128] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 07:08:00,782 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 07:08:00,782 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 16 [2022-01-18 07:08:00,782 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [779411638] [2022-01-18 07:08:00,782 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 07:08:00,782 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-18 07:08:00,783 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 07:08:00,783 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-18 07:08:00,783 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2022-01-18 07:08:00,783 INFO L87 Difference]: Start difference. First operand 8880 states and 34184 transitions. Second operand has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 07:08:02,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 07:08:02,120 INFO L93 Difference]: Finished difference Result 19256 states and 64283 transitions. [2022-01-18 07:08:02,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2022-01-18 07:08:02,120 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-01-18 07:08:02,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 07:08:02,160 INFO L225 Difference]: With dead ends: 19256 [2022-01-18 07:08:02,160 INFO L226 Difference]: Without dead ends: 19256 [2022-01-18 07:08:02,161 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 46 SyntacticMatches, 3 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3005 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1800, Invalid=5856, Unknown=0, NotChecked=0, Total=7656 [2022-01-18 07:08:02,161 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 636 mSDsluCounter, 486 mSDsCounter, 0 mSdLazyCounter, 794 mSolverCounterSat, 135 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 636 SdHoareTripleChecker+Valid, 299 SdHoareTripleChecker+Invalid, 929 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 135 IncrementalHoareTripleChecker+Valid, 794 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 07:08:02,161 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [636 Valid, 299 Invalid, 929 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [135 Valid, 794 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-18 07:08:02,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19256 states. [2022-01-18 07:08:02,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19256 to 8630. [2022-01-18 07:08:02,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8630 states, 8629 states have (on average 3.8324255417777264) internal successors, (33070), 8629 states have internal predecessors, (33070), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 07:08:02,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8630 states to 8630 states and 33070 transitions. [2022-01-18 07:08:02,420 INFO L78 Accepts]: Start accepts. Automaton has 8630 states and 33070 transitions. Word has length 28 [2022-01-18 07:08:02,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 07:08:02,420 INFO L470 AbstractCegarLoop]: Abstraction has 8630 states and 33070 transitions. [2022-01-18 07:08:02,420 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 07:08:02,420 INFO L276 IsEmpty]: Start isEmpty. Operand 8630 states and 33070 transitions. [2022-01-18 07:08:02,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-01-18 07:08:02,434 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 07:08:02,434 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 07:08:02,449 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (138)] Ended with exit code 0 [2022-01-18 07:08:02,649 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 138 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable139 [2022-01-18 07:08:02,649 INFO L402 AbstractCegarLoop]: === Iteration 141 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 07:08:02,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 07:08:02,649 INFO L85 PathProgramCache]: Analyzing trace with hash -73789236, now seen corresponding path program 81 times [2022-01-18 07:08:02,649 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 07:08:02,649 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1898661858] [2022-01-18 07:08:02,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 07:08:02,650 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 07:08:02,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 07:08:02,690 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 07:08:02,690 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 07:08:02,690 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1898661858] [2022-01-18 07:08:02,690 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1898661858] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 07:08:02,690 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1175011345] [2022-01-18 07:08:02,690 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 07:08:02,690 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 07:08:02,691 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 07:08:02,692 INFO L229 MonitoredProcess]: Starting monitored process 139 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 07:08:02,692 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (139)] Waiting until timeout for monitored process [2022-01-18 07:08:02,713 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-01-18 07:08:02,713 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 07:08:02,713 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2022-01-18 07:08:02,713 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 07:08:02,799 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 07:08:02,799 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 07:08:02,893 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 07:08:02,893 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1175011345] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 07:08:02,893 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 07:08:02,893 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 10] total 17 [2022-01-18 07:08:02,893 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1816828961] [2022-01-18 07:08:02,893 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 07:08:02,893 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-18 07:08:02,893 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 07:08:02,893 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-18 07:08:02,893 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=200, Unknown=0, NotChecked=0, Total=272 [2022-01-18 07:08:02,893 INFO L87 Difference]: Start difference. First operand 8630 states and 33070 transitions. Second operand has 17 states, 17 states have (on average 3.0) internal successors, (51), 17 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) [2022-01-18 07:08:03,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 07:08:03,985 INFO L93 Difference]: Finished difference Result 17367 states and 60928 transitions. [2022-01-18 07:08:03,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2022-01-18 07:08:03,985 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.0) internal successors, (51), 17 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 28 [2022-01-18 07:08:03,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 07:08:04,022 INFO L225 Difference]: With dead ends: 17367 [2022-01-18 07:08:04,022 INFO L226 Difference]: Without dead ends: 17359 [2022-01-18 07:08:04,022 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 48 SyntacticMatches, 1 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2272 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1477, Invalid=5003, Unknown=0, NotChecked=0, Total=6480 [2022-01-18 07:08:04,023 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 589 mSDsluCounter, 410 mSDsCounter, 0 mSdLazyCounter, 853 mSolverCounterSat, 127 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 589 SdHoareTripleChecker+Valid, 286 SdHoareTripleChecker+Invalid, 980 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 127 IncrementalHoareTripleChecker+Valid, 853 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 07:08:04,023 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [589 Valid, 286 Invalid, 980 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [127 Valid, 853 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-18 07:08:04,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17359 states. [2022-01-18 07:08:04,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17359 to 8340. [2022-01-18 07:08:04,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8340 states, 8339 states have (on average 3.849742175320782) internal successors, (32103), 8339 states have internal predecessors, (32103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 07:08:04,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8340 states to 8340 states and 32103 transitions. [2022-01-18 07:08:04,251 INFO L78 Accepts]: Start accepts. Automaton has 8340 states and 32103 transitions. Word has length 28 [2022-01-18 07:08:04,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 07:08:04,251 INFO L470 AbstractCegarLoop]: Abstraction has 8340 states and 32103 transitions. [2022-01-18 07:08:04,251 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.0) internal successors, (51), 17 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) [2022-01-18 07:08:04,251 INFO L276 IsEmpty]: Start isEmpty. Operand 8340 states and 32103 transitions. [2022-01-18 07:08:04,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-01-18 07:08:04,264 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 07:08:04,264 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 07:08:04,279 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (139)] Ended with exit code 0 [2022-01-18 07:08:04,479 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140,139 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 07:08:04,479 INFO L402 AbstractCegarLoop]: === Iteration 142 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 07:08:04,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 07:08:04,479 INFO L85 PathProgramCache]: Analyzing trace with hash -345798426, now seen corresponding path program 82 times [2022-01-18 07:08:04,479 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 07:08:04,480 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1729240829] [2022-01-18 07:08:04,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 07:08:04,480 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 07:08:04,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 07:08:04,508 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 07:08:04,508 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 07:08:04,508 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1729240829] [2022-01-18 07:08:04,508 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1729240829] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 07:08:04,508 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1209141585] [2022-01-18 07:08:04,508 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 07:08:04,508 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 07:08:04,508 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 07:08:04,509 INFO L229 MonitoredProcess]: Starting monitored process 140 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 07:08:04,510 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (140)] Waiting until timeout for monitored process [2022-01-18 07:08:04,531 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 07:08:04,531 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 07:08:04,531 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2022-01-18 07:08:04,532 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 07:08:04,652 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 07:08:04,652 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 07:08:04,773 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 07:08:04,773 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1209141585] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 07:08:04,773 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 07:08:04,773 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 10] total 21 [2022-01-18 07:08:04,773 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [302583187] [2022-01-18 07:08:04,773 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 07:08:04,774 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 07:08:04,774 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 07:08:04,774 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 07:08:04,774 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=320, Unknown=0, NotChecked=0, Total=420 [2022-01-18 07:08:04,774 INFO L87 Difference]: Start difference. First operand 8340 states and 32103 transitions. Second operand has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 21 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) [2022-01-18 07:08:08,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 07:08:08,353 INFO L93 Difference]: Finished difference Result 24954 states and 86653 transitions. [2022-01-18 07:08:08,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 204 states. [2022-01-18 07:08:08,354 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 21 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 28 [2022-01-18 07:08:08,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 07:08:08,414 INFO L225 Difference]: With dead ends: 24954 [2022-01-18 07:08:08,414 INFO L226 Difference]: Without dead ends: 24954 [2022-01-18 07:08:08,417 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 251 GetRequests, 43 SyntacticMatches, 2 SemanticMatches, 206 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20010 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=8056, Invalid=35000, Unknown=0, NotChecked=0, Total=43056 [2022-01-18 07:08:08,417 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 911 mSDsluCounter, 853 mSDsCounter, 0 mSdLazyCounter, 1924 mSolverCounterSat, 137 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 911 SdHoareTripleChecker+Valid, 492 SdHoareTripleChecker+Invalid, 2061 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 137 IncrementalHoareTripleChecker+Valid, 1924 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-18 07:08:08,417 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [911 Valid, 492 Invalid, 2061 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [137 Valid, 1924 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-18 07:08:08,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24954 states. [2022-01-18 07:08:08,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24954 to 8807. [2022-01-18 07:08:08,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8807 states, 8806 states have (on average 3.902679990915285) internal successors, (34367), 8806 states have internal predecessors, (34367), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 07:08:08,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8807 states to 8807 states and 34367 transitions. [2022-01-18 07:08:08,760 INFO L78 Accepts]: Start accepts. Automaton has 8807 states and 34367 transitions. Word has length 28 [2022-01-18 07:08:08,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 07:08:08,761 INFO L470 AbstractCegarLoop]: Abstraction has 8807 states and 34367 transitions. [2022-01-18 07:08:08,761 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 21 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) [2022-01-18 07:08:08,761 INFO L276 IsEmpty]: Start isEmpty. Operand 8807 states and 34367 transitions. [2022-01-18 07:08:08,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-01-18 07:08:08,775 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 07:08:08,775 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 07:08:08,792 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (140)] Forceful destruction successful, exit code 0 [2022-01-18 07:08:08,987 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141,140 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 07:08:08,987 INFO L402 AbstractCegarLoop]: === Iteration 143 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 07:08:08,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 07:08:08,987 INFO L85 PathProgramCache]: Analyzing trace with hash 221153654, now seen corresponding path program 83 times [2022-01-18 07:08:08,987 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 07:08:08,988 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1368022971] [2022-01-18 07:08:08,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 07:08:08,988 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 07:08:08,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 07:08:09,021 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 07:08:09,021 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 07:08:09,021 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1368022971] [2022-01-18 07:08:09,021 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1368022971] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 07:08:09,021 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1232854444] [2022-01-18 07:08:09,021 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 07:08:09,021 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 07:08:09,021 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 07:08:09,022 INFO L229 MonitoredProcess]: Starting monitored process 141 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 07:08:09,023 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (141)] Waiting until timeout for monitored process [2022-01-18 07:08:09,043 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-01-18 07:08:09,043 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 07:08:09,044 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2022-01-18 07:08:09,044 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 07:08:09,156 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 07:08:09,156 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 07:08:09,252 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 07:08:09,252 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1232854444] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 07:08:09,252 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 07:08:09,252 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 10] total 21 [2022-01-18 07:08:09,252 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [665675559] [2022-01-18 07:08:09,252 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 07:08:09,252 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 07:08:09,252 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 07:08:09,252 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 07:08:09,252 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=318, Unknown=0, NotChecked=0, Total=420 [2022-01-18 07:08:09,253 INFO L87 Difference]: Start difference. First operand 8807 states and 34367 transitions. Second operand has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 21 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) [2022-01-18 07:08:11,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 07:08:11,379 INFO L93 Difference]: Finished difference Result 23265 states and 81072 transitions. [2022-01-18 07:08:11,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 157 states. [2022-01-18 07:08:11,379 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 21 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 28 [2022-01-18 07:08:11,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 07:08:11,429 INFO L225 Difference]: With dead ends: 23265 [2022-01-18 07:08:11,429 INFO L226 Difference]: Without dead ends: 23265 [2022-01-18 07:08:11,431 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 204 GetRequests, 43 SyntacticMatches, 2 SemanticMatches, 159 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11843 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=5497, Invalid=20263, Unknown=0, NotChecked=0, Total=25760 [2022-01-18 07:08:11,431 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 1034 mSDsluCounter, 828 mSDsCounter, 0 mSdLazyCounter, 1445 mSolverCounterSat, 160 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1034 SdHoareTripleChecker+Valid, 456 SdHoareTripleChecker+Invalid, 1605 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 160 IncrementalHoareTripleChecker+Valid, 1445 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 07:08:11,431 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1034 Valid, 456 Invalid, 1605 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [160 Valid, 1445 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-18 07:08:11,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23265 states. [2022-01-18 07:08:11,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23265 to 8714. [2022-01-18 07:08:11,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8714 states, 8713 states have (on average 3.888442557098588) internal successors, (33880), 8713 states have internal predecessors, (33880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 07:08:11,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8714 states to 8714 states and 33880 transitions. [2022-01-18 07:08:11,746 INFO L78 Accepts]: Start accepts. Automaton has 8714 states and 33880 transitions. Word has length 28 [2022-01-18 07:08:11,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 07:08:11,746 INFO L470 AbstractCegarLoop]: Abstraction has 8714 states and 33880 transitions. [2022-01-18 07:08:11,746 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 21 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) [2022-01-18 07:08:11,746 INFO L276 IsEmpty]: Start isEmpty. Operand 8714 states and 33880 transitions. [2022-01-18 07:08:11,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-01-18 07:08:11,760 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 07:08:11,760 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 07:08:11,775 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (141)] Ended with exit code 0 [2022-01-18 07:08:11,975 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142,141 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 07:08:11,975 INFO L402 AbstractCegarLoop]: === Iteration 144 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 07:08:11,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 07:08:11,975 INFO L85 PathProgramCache]: Analyzing trace with hash -951192204, now seen corresponding path program 84 times [2022-01-18 07:08:11,975 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 07:08:11,975 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2064106035] [2022-01-18 07:08:11,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 07:08:11,975 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 07:08:11,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 07:08:12,002 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 07:08:12,002 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 07:08:12,002 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2064106035] [2022-01-18 07:08:12,002 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2064106035] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 07:08:12,002 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2132585561] [2022-01-18 07:08:12,002 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 07:08:12,002 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 07:08:12,002 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 07:08:12,003 INFO L229 MonitoredProcess]: Starting monitored process 142 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 07:08:12,004 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (142)] Waiting until timeout for monitored process [2022-01-18 07:08:12,024 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-01-18 07:08:12,024 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 07:08:12,024 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2022-01-18 07:08:12,025 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 07:08:12,090 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 07:08:12,090 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 07:08:12,163 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 07:08:12,163 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2132585561] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 07:08:12,163 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 07:08:12,163 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 10] total 19 [2022-01-18 07:08:12,163 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1813206775] [2022-01-18 07:08:12,163 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 07:08:12,163 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-18 07:08:12,163 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 07:08:12,164 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-18 07:08:12,164 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=247, Unknown=0, NotChecked=0, Total=342 [2022-01-18 07:08:12,164 INFO L87 Difference]: Start difference. First operand 8714 states and 33880 transitions. Second operand has 19 states, 19 states have (on average 2.8947368421052633) internal successors, (55), 19 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 07:08:13,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 07:08:13,844 INFO L93 Difference]: Finished difference Result 21570 states and 73897 transitions. [2022-01-18 07:08:13,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 147 states. [2022-01-18 07:08:13,845 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.8947368421052633) internal successors, (55), 19 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-01-18 07:08:13,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 07:08:13,888 INFO L225 Difference]: With dead ends: 21570 [2022-01-18 07:08:13,888 INFO L226 Difference]: Without dead ends: 21570 [2022-01-18 07:08:13,889 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 45 SyntacticMatches, 2 SemanticMatches, 145 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9692 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=4569, Invalid=16893, Unknown=0, NotChecked=0, Total=21462 [2022-01-18 07:08:13,889 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 791 mSDsluCounter, 632 mSDsCounter, 0 mSdLazyCounter, 1307 mSolverCounterSat, 138 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 791 SdHoareTripleChecker+Valid, 390 SdHoareTripleChecker+Invalid, 1445 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 138 IncrementalHoareTripleChecker+Valid, 1307 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 07:08:13,889 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [791 Valid, 390 Invalid, 1445 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [138 Valid, 1307 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-18 07:08:13,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21570 states. [2022-01-18 07:08:14,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21570 to 8772. [2022-01-18 07:08:14,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8772 states, 8771 states have (on average 3.8895222893626724) internal successors, (34115), 8771 states have internal predecessors, (34115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 07:08:14,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8772 states to 8772 states and 34115 transitions. [2022-01-18 07:08:14,184 INFO L78 Accepts]: Start accepts. Automaton has 8772 states and 34115 transitions. Word has length 28 [2022-01-18 07:08:14,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 07:08:14,184 INFO L470 AbstractCegarLoop]: Abstraction has 8772 states and 34115 transitions. [2022-01-18 07:08:14,184 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.8947368421052633) internal successors, (55), 19 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 07:08:14,184 INFO L276 IsEmpty]: Start isEmpty. Operand 8772 states and 34115 transitions. [2022-01-18 07:08:14,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-01-18 07:08:14,198 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 07:08:14,198 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 07:08:14,213 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (142)] Forceful destruction successful, exit code 0 [2022-01-18 07:08:14,403 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable143,142 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 07:08:14,403 INFO L402 AbstractCegarLoop]: === Iteration 145 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 07:08:14,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 07:08:14,403 INFO L85 PathProgramCache]: Analyzing trace with hash -869816116, now seen corresponding path program 85 times [2022-01-18 07:08:14,404 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 07:08:14,404 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [502401791] [2022-01-18 07:08:14,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 07:08:14,404 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 07:08:14,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 07:08:14,444 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 07:08:14,444 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 07:08:14,444 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [502401791] [2022-01-18 07:08:14,444 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [502401791] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 07:08:14,444 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1748560428] [2022-01-18 07:08:14,444 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 07:08:14,444 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 07:08:14,444 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 07:08:14,445 INFO L229 MonitoredProcess]: Starting monitored process 143 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 07:08:14,446 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (143)] Waiting until timeout for monitored process [2022-01-18 07:08:14,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 07:08:14,467 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2022-01-18 07:08:14,467 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 07:08:14,563 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 07:08:14,563 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 07:08:14,632 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 07:08:14,633 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1748560428] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 07:08:14,633 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 07:08:14,633 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 10] total 19 [2022-01-18 07:08:14,633 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1264412153] [2022-01-18 07:08:14,633 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 07:08:14,633 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-18 07:08:14,633 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 07:08:14,635 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-18 07:08:14,636 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=247, Unknown=0, NotChecked=0, Total=342 [2022-01-18 07:08:14,636 INFO L87 Difference]: Start difference. First operand 8772 states and 34115 transitions. Second operand has 19 states, 19 states have (on average 2.8947368421052633) internal successors, (55), 19 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 07:08:16,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 07:08:16,085 INFO L93 Difference]: Finished difference Result 20595 states and 71416 transitions. [2022-01-18 07:08:16,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 129 states. [2022-01-18 07:08:16,085 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.8947368421052633) internal successors, (55), 19 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-01-18 07:08:16,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 07:08:16,130 INFO L225 Difference]: With dead ends: 20595 [2022-01-18 07:08:16,130 INFO L226 Difference]: Without dead ends: 20583 [2022-01-18 07:08:16,132 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 128 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7060 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=3686, Invalid=13084, Unknown=0, NotChecked=0, Total=16770 [2022-01-18 07:08:16,132 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 780 mSDsluCounter, 614 mSDsCounter, 0 mSdLazyCounter, 1216 mSolverCounterSat, 151 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 780 SdHoareTripleChecker+Valid, 402 SdHoareTripleChecker+Invalid, 1367 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 151 IncrementalHoareTripleChecker+Valid, 1216 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 07:08:16,132 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [780 Valid, 402 Invalid, 1367 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [151 Valid, 1216 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-18 07:08:16,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20583 states. [2022-01-18 07:08:16,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20583 to 8591. [2022-01-18 07:08:16,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8591 states, 8590 states have (on average 3.873923166472643) internal successors, (33277), 8590 states have internal predecessors, (33277), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 07:08:16,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8591 states to 8591 states and 33277 transitions. [2022-01-18 07:08:16,464 INFO L78 Accepts]: Start accepts. Automaton has 8591 states and 33277 transitions. Word has length 28 [2022-01-18 07:08:16,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 07:08:16,464 INFO L470 AbstractCegarLoop]: Abstraction has 8591 states and 33277 transitions. [2022-01-18 07:08:16,465 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.8947368421052633) internal successors, (55), 19 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 07:08:16,465 INFO L276 IsEmpty]: Start isEmpty. Operand 8591 states and 33277 transitions. [2022-01-18 07:08:16,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-01-18 07:08:16,478 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 07:08:16,478 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 07:08:16,494 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (143)] Ended with exit code 0 [2022-01-18 07:08:16,691 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 143 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable144 [2022-01-18 07:08:16,691 INFO L402 AbstractCegarLoop]: === Iteration 146 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 07:08:16,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 07:08:16,692 INFO L85 PathProgramCache]: Analyzing trace with hash 60841100, now seen corresponding path program 86 times [2022-01-18 07:08:16,692 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 07:08:16,692 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1991244227] [2022-01-18 07:08:16,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 07:08:16,692 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 07:08:16,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 07:08:16,731 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 07:08:16,731 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 07:08:16,731 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1991244227] [2022-01-18 07:08:16,732 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1991244227] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 07:08:16,732 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [615490015] [2022-01-18 07:08:16,732 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 07:08:16,732 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 07:08:16,732 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 07:08:16,733 INFO L229 MonitoredProcess]: Starting monitored process 144 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 07:08:16,733 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (144)] Waiting until timeout for monitored process [2022-01-18 07:08:16,757 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 07:08:16,758 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 07:08:16,758 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2022-01-18 07:08:16,758 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 07:08:16,873 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 07:08:16,873 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 07:08:16,993 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 07:08:16,993 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [615490015] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 07:08:16,993 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 07:08:16,993 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 10] total 21 [2022-01-18 07:08:16,993 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [16938709] [2022-01-18 07:08:16,993 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 07:08:16,993 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 07:08:16,994 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 07:08:16,994 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 07:08:16,994 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=317, Unknown=0, NotChecked=0, Total=420 [2022-01-18 07:08:16,994 INFO L87 Difference]: Start difference. First operand 8591 states and 33277 transitions. Second operand has 21 states, 21 states have (on average 2.7142857142857144) internal successors, (57), 21 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 07:08:19,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 07:08:19,417 INFO L93 Difference]: Finished difference Result 19989 states and 68270 transitions. [2022-01-18 07:08:19,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 144 states. [2022-01-18 07:08:19,417 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.7142857142857144) internal successors, (57), 21 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-01-18 07:08:19,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 07:08:19,465 INFO L225 Difference]: With dead ends: 19989 [2022-01-18 07:08:19,465 INFO L226 Difference]: Without dead ends: 19989 [2022-01-18 07:08:19,468 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 43 SyntacticMatches, 2 SemanticMatches, 146 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9362 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=4648, Invalid=17108, Unknown=0, NotChecked=0, Total=21756 [2022-01-18 07:08:19,468 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 970 mSDsluCounter, 905 mSDsCounter, 0 mSdLazyCounter, 1700 mSolverCounterSat, 143 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 970 SdHoareTripleChecker+Valid, 535 SdHoareTripleChecker+Invalid, 1843 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 143 IncrementalHoareTripleChecker+Valid, 1700 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-18 07:08:19,468 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [970 Valid, 535 Invalid, 1843 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [143 Valid, 1700 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-18 07:08:19,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19989 states. [2022-01-18 07:08:19,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19989 to 8609. [2022-01-18 07:08:19,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8609 states, 8608 states have (on average 3.874302973977695) internal successors, (33350), 8608 states have internal predecessors, (33350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 07:08:19,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8609 states to 8609 states and 33350 transitions. [2022-01-18 07:08:19,816 INFO L78 Accepts]: Start accepts. Automaton has 8609 states and 33350 transitions. Word has length 28 [2022-01-18 07:08:19,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 07:08:19,816 INFO L470 AbstractCegarLoop]: Abstraction has 8609 states and 33350 transitions. [2022-01-18 07:08:19,816 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.7142857142857144) internal successors, (57), 21 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 07:08:19,816 INFO L276 IsEmpty]: Start isEmpty. Operand 8609 states and 33350 transitions. [2022-01-18 07:08:19,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-01-18 07:08:19,830 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 07:08:19,830 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 07:08:19,848 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (144)] Forceful destruction successful, exit code 0 [2022-01-18 07:08:20,046 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 144 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable145 [2022-01-18 07:08:20,046 INFO L402 AbstractCegarLoop]: === Iteration 147 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 07:08:20,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 07:08:20,046 INFO L85 PathProgramCache]: Analyzing trace with hash 1703880254, now seen corresponding path program 87 times [2022-01-18 07:08:20,046 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 07:08:20,046 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [917207200] [2022-01-18 07:08:20,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 07:08:20,047 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 07:08:20,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 07:08:20,081 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 07:08:20,081 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 07:08:20,081 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [917207200] [2022-01-18 07:08:20,081 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [917207200] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 07:08:20,081 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1792979080] [2022-01-18 07:08:20,081 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 07:08:20,081 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 07:08:20,081 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 07:08:20,082 INFO L229 MonitoredProcess]: Starting monitored process 145 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 07:08:20,083 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (145)] Waiting until timeout for monitored process [2022-01-18 07:08:20,104 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-01-18 07:08:20,104 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 07:08:20,104 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2022-01-18 07:08:20,105 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 07:08:20,202 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 07:08:20,202 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 07:08:20,318 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 07:08:20,318 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1792979080] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 07:08:20,319 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 07:08:20,319 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 10] total 21 [2022-01-18 07:08:20,319 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1954658271] [2022-01-18 07:08:20,319 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 07:08:20,319 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 07:08:20,319 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 07:08:20,319 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 07:08:20,319 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=319, Unknown=0, NotChecked=0, Total=420 [2022-01-18 07:08:20,319 INFO L87 Difference]: Start difference. First operand 8609 states and 33350 transitions. Second operand has 21 states, 21 states have (on average 2.7142857142857144) internal successors, (57), 21 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 07:08:23,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 07:08:23,123 INFO L93 Difference]: Finished difference Result 19311 states and 67454 transitions. [2022-01-18 07:08:23,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 168 states. [2022-01-18 07:08:23,123 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.7142857142857144) internal successors, (57), 21 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-01-18 07:08:23,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 07:08:23,169 INFO L225 Difference]: With dead ends: 19311 [2022-01-18 07:08:23,169 INFO L226 Difference]: Without dead ends: 19303 [2022-01-18 07:08:23,173 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 216 GetRequests, 44 SyntacticMatches, 1 SemanticMatches, 171 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12787 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=5782, Invalid=23974, Unknown=0, NotChecked=0, Total=29756 [2022-01-18 07:08:23,173 INFO L933 BasicCegarLoop]: 50 mSDtfsCounter, 768 mSDsluCounter, 922 mSDsCounter, 0 mSdLazyCounter, 1911 mSolverCounterSat, 170 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 768 SdHoareTripleChecker+Valid, 607 SdHoareTripleChecker+Invalid, 2081 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 170 IncrementalHoareTripleChecker+Valid, 1911 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-18 07:08:23,173 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [768 Valid, 607 Invalid, 2081 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [170 Valid, 1911 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-18 07:08:23,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19303 states. [2022-01-18 07:08:23,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19303 to 7736. [2022-01-18 07:08:23,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7736 states, 7735 states have (on average 3.799095022624434) internal successors, (29386), 7735 states have internal predecessors, (29386), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 07:08:23,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7736 states to 7736 states and 29386 transitions. [2022-01-18 07:08:23,462 INFO L78 Accepts]: Start accepts. Automaton has 7736 states and 29386 transitions. Word has length 28 [2022-01-18 07:08:23,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 07:08:23,462 INFO L470 AbstractCegarLoop]: Abstraction has 7736 states and 29386 transitions. [2022-01-18 07:08:23,462 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.7142857142857144) internal successors, (57), 21 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 07:08:23,462 INFO L276 IsEmpty]: Start isEmpty. Operand 7736 states and 29386 transitions. [2022-01-18 07:08:23,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-01-18 07:08:23,475 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 07:08:23,475 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 07:08:23,492 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (145)] Forceful destruction successful, exit code 0 [2022-01-18 07:08:23,690 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 145 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable146 [2022-01-18 07:08:23,690 INFO L402 AbstractCegarLoop]: === Iteration 148 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 07:08:23,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 07:08:23,691 INFO L85 PathProgramCache]: Analyzing trace with hash 1787283834, now seen corresponding path program 88 times [2022-01-18 07:08:23,691 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 07:08:23,691 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [161280376] [2022-01-18 07:08:23,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 07:08:23,691 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 07:08:23,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 07:08:23,719 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 07:08:23,719 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 07:08:23,719 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [161280376] [2022-01-18 07:08:23,719 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [161280376] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 07:08:23,719 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1707946292] [2022-01-18 07:08:23,719 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 07:08:23,719 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 07:08:23,720 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 07:08:23,720 INFO L229 MonitoredProcess]: Starting monitored process 146 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 07:08:23,721 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (146)] Waiting until timeout for monitored process [2022-01-18 07:08:23,769 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 07:08:23,769 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 07:08:23,769 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2022-01-18 07:08:23,770 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 07:08:23,844 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 07:08:23,845 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 07:08:23,914 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 07:08:23,914 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1707946292] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 07:08:23,914 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 07:08:23,914 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 9] total 19 [2022-01-18 07:08:23,914 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1255990293] [2022-01-18 07:08:23,914 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 07:08:23,914 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-18 07:08:23,914 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 07:08:23,915 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-18 07:08:23,915 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=264, Unknown=0, NotChecked=0, Total=342 [2022-01-18 07:08:23,915 INFO L87 Difference]: Start difference. First operand 7736 states and 29386 transitions. Second operand has 19 states, 19 states have (on average 2.8947368421052633) internal successors, (55), 19 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 07:08:25,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 07:08:25,930 INFO L93 Difference]: Finished difference Result 16868 states and 56894 transitions. [2022-01-18 07:08:25,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 131 states. [2022-01-18 07:08:25,930 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.8947368421052633) internal successors, (55), 19 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-01-18 07:08:25,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 07:08:25,965 INFO L225 Difference]: With dead ends: 16868 [2022-01-18 07:08:25,965 INFO L226 Difference]: Without dead ends: 16868 [2022-01-18 07:08:25,967 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 45 SyntacticMatches, 2 SemanticMatches, 131 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7102 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=3292, Invalid=14264, Unknown=0, NotChecked=0, Total=17556 [2022-01-18 07:08:25,968 INFO L933 BasicCegarLoop]: 43 mSDtfsCounter, 617 mSDsluCounter, 691 mSDsCounter, 0 mSdLazyCounter, 1288 mSolverCounterSat, 100 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 617 SdHoareTripleChecker+Valid, 433 SdHoareTripleChecker+Invalid, 1388 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 100 IncrementalHoareTripleChecker+Valid, 1288 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 07:08:25,968 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [617 Valid, 433 Invalid, 1388 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [100 Valid, 1288 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-18 07:08:25,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16868 states. [2022-01-18 07:08:26,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16868 to 7752. [2022-01-18 07:08:26,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7752 states, 7751 states have (on average 3.798219584569733) internal successors, (29440), 7751 states have internal predecessors, (29440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 07:08:26,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7752 states to 7752 states and 29440 transitions. [2022-01-18 07:08:26,193 INFO L78 Accepts]: Start accepts. Automaton has 7752 states and 29440 transitions. Word has length 28 [2022-01-18 07:08:26,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 07:08:26,193 INFO L470 AbstractCegarLoop]: Abstraction has 7752 states and 29440 transitions. [2022-01-18 07:08:26,193 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.8947368421052633) internal successors, (55), 19 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 07:08:26,193 INFO L276 IsEmpty]: Start isEmpty. Operand 7752 states and 29440 transitions. [2022-01-18 07:08:26,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-01-18 07:08:26,205 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 07:08:26,205 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 07:08:26,221 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (146)] Forceful destruction successful, exit code 0 [2022-01-18 07:08:26,410 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable147,146 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 07:08:26,410 INFO L402 AbstractCegarLoop]: === Iteration 149 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 07:08:26,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 07:08:26,410 INFO L85 PathProgramCache]: Analyzing trace with hash -854323286, now seen corresponding path program 89 times [2022-01-18 07:08:26,410 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 07:08:26,410 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1453662880] [2022-01-18 07:08:26,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 07:08:26,411 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 07:08:26,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 07:08:26,446 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 07:08:26,446 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 07:08:26,447 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1453662880] [2022-01-18 07:08:26,447 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1453662880] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 07:08:26,447 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1821648456] [2022-01-18 07:08:26,447 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 07:08:26,447 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 07:08:26,447 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 07:08:26,448 INFO L229 MonitoredProcess]: Starting monitored process 147 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 07:08:26,448 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (147)] Waiting until timeout for monitored process [2022-01-18 07:08:26,469 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-01-18 07:08:26,469 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 07:08:26,469 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2022-01-18 07:08:26,469 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 07:08:26,582 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 07:08:26,582 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 07:08:26,687 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 07:08:26,688 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1821648456] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 07:08:26,688 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 07:08:26,688 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 9] total 21 [2022-01-18 07:08:26,688 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1111514264] [2022-01-18 07:08:26,688 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 07:08:26,688 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 07:08:26,688 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 07:08:26,688 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 07:08:26,688 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=332, Unknown=0, NotChecked=0, Total=420 [2022-01-18 07:08:26,688 INFO L87 Difference]: Start difference. First operand 7752 states and 29440 transitions. Second operand has 21 states, 21 states have (on average 2.7142857142857144) internal successors, (57), 21 states have internal predecessors, (57), 0 states have call successors, (0), 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... [2022-01-18 07:08:29,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 156 states. [2022-01-18 07:08:29,258 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 203 GetRequests, 43 SyntacticMatches, 2 SemanticMatches, 158 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10660 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=4514, Invalid=20926, Unknown=0, NotChecked=0, Total=25440 [2022-01-18 07:08:29,258 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 625 mSDsluCounter, 609 mSDsCounter, 0 mSdLazyCounter, 1421 mSolverCounterSat, 140 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 625 SdHoareTripleChecker+Valid, 401 SdHoareTripleChecker+Invalid, 1561 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 140 IncrementalHoareTripleChecker+Valid, 1421 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-18 07:08:29,258 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [625 Valid, 401 Invalid, 1561 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [140 Valid, 1421 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-18 07:08:29,259 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0ASSERT_VIOLATIONASSERT (3 of 4 remaining) [2022-01-18 07:08:29,270 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2022-01-18 07:08:29,270 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (147)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2022-01-18 07:08:29,275 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (147)] Forceful destruction successful, exit code 0 [2022-01-18 07:08:29,467 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable148,147 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 07:08:29,468 WARN L594 AbstractCegarLoop]: Verification canceled: while BasicCegarLoop was constructing difference of abstraction (7752states) and FLOYD_HOARE automaton (currently 156 states, 21 states before enhancement),while ReachableStatesComputation was computing reachable states (9694 states constructed, input type IntersectNwa). [2022-01-18 07:08:29,469 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0INUSE_VIOLATION (2 of 4 remaining) [2022-01-18 07:08:29,469 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1INUSE_VIOLATION (1 of 4 remaining) [2022-01-18 07:08:29,469 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr2INUSE_VIOLATION (0 of 4 remaining) [2022-01-18 07:08:29,471 INFO L732 BasicCegarLoop]: Path program histogram: [89, 57, 1, 1, 1] [2022-01-18 07:08:29,473 INFO L229 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2022-01-18 07:08:29,473 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2022-01-18 07:08:29,474 INFO L202 PluginConnector]: Adding new model max-array.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.01 07:08:29 BasicIcfg [2022-01-18 07:08:29,474 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-01-18 07:08:29,474 INFO L158 Benchmark]: Toolchain (without parser) took 885023.05ms. Allocated memory was 434.1MB in the beginning and 1.4GB in the end (delta: 924.8MB). Free memory was 392.6MB in the beginning and 1.2GB in the end (delta: -841.6MB). Peak memory consumption was 84.5MB. Max. memory is 16.0GB. [2022-01-18 07:08:29,474 INFO L158 Benchmark]: Boogie PL CUP Parser took 0.32ms. Allocated memory is still 434.1MB. Free memory is still 393.7MB. There was no memory consumed. Max. memory is 16.0GB. [2022-01-18 07:08:29,474 INFO L158 Benchmark]: Boogie Procedure Inliner took 29.26ms. Allocated memory is still 434.1MB. Free memory was 392.4MB in the beginning and 391.0MB in the end (delta: 1.5MB). Peak memory consumption was 4.2MB. Max. memory is 16.0GB. [2022-01-18 07:08:29,474 INFO L158 Benchmark]: Boogie Preprocessor took 9.94ms. Allocated memory is still 434.1MB. Free memory was 391.0MB in the beginning and 390.0MB in the end (delta: 982.7kB). There was no memory consumed. Max. memory is 16.0GB. [2022-01-18 07:08:29,474 INFO L158 Benchmark]: RCFGBuilder took 251.14ms. Allocated memory is still 434.1MB. Free memory was 389.9MB in the beginning and 380.6MB in the end (delta: 9.3MB). Peak memory consumption was 10.5MB. Max. memory is 16.0GB. [2022-01-18 07:08:29,474 INFO L158 Benchmark]: TraceAbstraction took 884729.75ms. Allocated memory was 434.1MB in the beginning and 1.4GB in the end (delta: 924.8MB). Free memory was 380.1MB in the beginning and 1.2GB in the end (delta: -854.1MB). Peak memory consumption was 69.9MB. Max. memory is 16.0GB. [2022-01-18 07:08:29,474 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 0.32ms. Allocated memory is still 434.1MB. Free memory is still 393.7MB. There was no memory consumed. Max. memory is 16.0GB. * Boogie Procedure Inliner took 29.26ms. Allocated memory is still 434.1MB. Free memory was 392.4MB in the beginning and 391.0MB in the end (delta: 1.5MB). Peak memory consumption was 4.2MB. Max. memory is 16.0GB. * Boogie Preprocessor took 9.94ms. Allocated memory is still 434.1MB. Free memory was 391.0MB in the beginning and 390.0MB in the end (delta: 982.7kB). There was no memory consumed. Max. memory is 16.0GB. * RCFGBuilder took 251.14ms. Allocated memory is still 434.1MB. Free memory was 389.9MB in the beginning and 380.6MB in the end (delta: 9.3MB). Peak memory consumption was 10.5MB. Max. memory is 16.0GB. * TraceAbstraction took 884729.75ms. Allocated memory was 434.1MB in the beginning and 1.4GB in the end (delta: 924.8MB). Free memory was 380.1MB in the beginning and 1.2GB in the end (delta: -854.1MB). Peak memory consumption was 69.9MB. Max. memory is 16.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - TimeoutResultAtElement [Line: 65]: Timeout (TraceAbstraction) Unable to prove that assertion always holds Cancelled while BasicCegarLoop was constructing difference of abstraction (7752states) and FLOYD_HOARE automaton (currently 156 states, 21 states before enhancement),while ReachableStatesComputation was computing reachable states (9694 states constructed, input type IntersectNwa). - TimeoutResultAtElement [Line: 58]: 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 (7752states) and FLOYD_HOARE automaton (currently 156 states, 21 states before enhancement),while ReachableStatesComputation was computing reachable states (9694 states constructed, input type IntersectNwa). - TimeoutResultAtElement [Line: 59]: 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 (7752states) and FLOYD_HOARE automaton (currently 156 states, 21 states before enhancement),while ReachableStatesComputation was computing reachable states (9694 states constructed, input type IntersectNwa). - TimeoutResultAtElement [Line: 58]: 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 (7752states) and FLOYD_HOARE automaton (currently 156 states, 21 states before enhancement),while ReachableStatesComputation was computing reachable states (9694 states constructed, input type IntersectNwa). - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 7 procedures, 42 locations, 4 error locations. Started 1 CEGAR loops. OverallTime: 884.6s, OverallIterations: 149, TraceHistogramMax: 3, PathProgramHistogramMax: 89, EmptinessCheckTime: 0.8s, AutomataDifference: 500.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 61759 SdHoareTripleChecker+Valid, 91.7s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 61759 mSDsluCounter, 52797 SdHoareTripleChecker+Invalid, 78.3s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 20730 IncrementalHoareTripleChecker+Unchecked, 88964 mSDsCounter, 12262 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 175081 IncrementalHoareTripleChecker+Invalid, 208073 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 12262 mSolverCounterUnsat, 4680 mSDtfsCounter, 175081 mSolverCounterSat, 0.5s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 17282 GetRequests, 5675 SyntacticMatches, 353 SemanticMatches, 11254 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 437163 ImplicationChecksByTransitivity, 440.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=8880occurred in iteration=139, InterpolantAutomatonStates: 9449, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 12.5s AutomataMinimizationTime, 148 MinimizatonAttempts, 496786 StatesRemovedByMinimization, 148 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.4s SsaConstructionTime, 1.7s SatisfiabilityAnalysisTime, 334.6s InterpolantComputationTime, 7582 NumberOfCodeBlocks, 7576 NumberOfCodeBlocksAsserted, 482 NumberOfCheckSat, 10903 ConstructedInterpolants, 217 QuantifiedInterpolants, 224243 SizeOfPredicates, 1544 NumberOfNonLiveVariables, 9532 ConjunctsInSsa, 2664 ConjunctsInUnsatCore, 441 InterpolantComputations, 3 PerfectInterpolantSequences, 455/2921 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