/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe-Separate.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/parallel/parallel-sum-2.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-bc79526 [2022-01-18 15:43:13,089 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-18 15:43:13,090 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-18 15:43:13,114 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-01-18 15:43:13,152 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-18 15:43:13,152 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-18 15:43:13,152 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-18 15:43:13,155 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe-Separate.epf [2022-01-18 15:43:13,200 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-18 15:43:13,200 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-18 15:43:13,202 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-01-18 15:43:13,202 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-01-18 15:43:13,203 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-01-18 15:43:13,203 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-01-18 15:43:13,203 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-01-18 15:43:13,203 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-01-18 15:43:13,204 INFO L138 SettingsManager]: * Use SBE=true [2022-01-18 15:43:13,204 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-18 15:43:13,204 INFO L138 SettingsManager]: * sizeof long=4 [2022-01-18 15:43:13,204 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-18 15:43:13,204 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-01-18 15:43:13,205 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-18 15:43:13,205 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-18 15:43:13,205 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-18 15:43:13,205 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-18 15:43:13,205 INFO L138 SettingsManager]: * sizeof long double=12 [2022-01-18 15:43:13,205 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-18 15:43:13,205 INFO L138 SettingsManager]: * Use constant arrays=true [2022-01-18 15:43:13,205 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-18 15:43:13,205 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-18 15:43:13,205 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-18 15:43:13,205 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-01-18 15:43:13,205 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-18 15:43:13,206 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-18 15:43:13,206 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-18 15:43:13,206 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-01-18 15:43:13,207 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-01-18 15:43:13,207 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-01-18 15:43:13,207 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-01-18 15:43:13,207 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-01-18 15:43:13,207 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-01-18 15:43:13,207 INFO L138 SettingsManager]: * Check the insufficient thread errors last=true [2022-01-18 15:43:13,207 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2022-01-18 15:43:13,348 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-18 15:43:13,366 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-18 15:43:13,367 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-18 15:43:13,368 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2022-01-18 15:43:13,372 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2022-01-18 15:43:13,373 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/parallel/parallel-sum-2.wvr.bpl [2022-01-18 15:43:13,373 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/parallel/parallel-sum-2.wvr.bpl' [2022-01-18 15:43:13,397 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-18 15:43:13,398 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-01-18 15:43:13,399 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-01-18 15:43:13,399 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-01-18 15:43:13,399 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-01-18 15:43:13,406 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "parallel-sum-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 03:43:13" (1/1) ... [2022-01-18 15:43:13,410 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "parallel-sum-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 03:43:13" (1/1) ... [2022-01-18 15:43:13,415 INFO L137 Inliner]: procedures = 7, calls = 6, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2022-01-18 15:43:13,416 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-01-18 15:43:13,417 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-18 15:43:13,417 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-18 15:43:13,417 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-18 15:43:13,422 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "parallel-sum-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 03:43:13" (1/1) ... [2022-01-18 15:43:13,422 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "parallel-sum-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 03:43:13" (1/1) ... [2022-01-18 15:43:13,425 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "parallel-sum-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 03:43:13" (1/1) ... [2022-01-18 15:43:13,425 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "parallel-sum-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 03:43:13" (1/1) ... [2022-01-18 15:43:13,438 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "parallel-sum-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 03:43:13" (1/1) ... [2022-01-18 15:43:13,440 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "parallel-sum-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 03:43:13" (1/1) ... [2022-01-18 15:43:13,441 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "parallel-sum-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 03:43:13" (1/1) ... [2022-01-18 15:43:13,441 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-18 15:43:13,442 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-18 15:43:13,442 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-18 15:43:13,442 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-18 15:43:13,443 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "parallel-sum-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 03:43:13" (1/1) ... [2022-01-18 15:43:13,453 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-18 15:43:13,461 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:43:13,475 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-01-18 15:43:13,495 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-01-18 15:43:13,517 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2022-01-18 15:43:13,518 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-01-18 15:43:13,518 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-01-18 15:43:13,518 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2022-01-18 15:43:13,518 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-01-18 15:43:13,518 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-01-18 15:43:13,518 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2022-01-18 15:43:13,518 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-18 15:43:13,518 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-18 15:43:13,518 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2022-01-18 15:43:13,518 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2022-01-18 15:43:13,518 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2022-01-18 15:43:13,518 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread4 given in one single declaration [2022-01-18 15:43:13,518 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2022-01-18 15:43:13,519 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2022-01-18 15:43:13,519 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread5 given in one single declaration [2022-01-18 15:43:13,519 INFO L130 BoogieDeclarations]: Found specification of procedure thread5 [2022-01-18 15:43:13,519 INFO L138 BoogieDeclarations]: Found implementation of procedure thread5 [2022-01-18 15:43:13,519 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread6 given in one single declaration [2022-01-18 15:43:13,519 INFO L130 BoogieDeclarations]: Found specification of procedure thread6 [2022-01-18 15:43:13,519 INFO L138 BoogieDeclarations]: Found implementation of procedure thread6 [2022-01-18 15:43:13,520 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-01-18 15:43:13,562 INFO L234 CfgBuilder]: Building ICFG [2022-01-18 15:43:13,564 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-18 15:43:13,686 INFO L275 CfgBuilder]: Performing block encoding [2022-01-18 15:43:13,700 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-18 15:43:13,701 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2022-01-18 15:43:13,702 WARN L329 CfgBuilder]: Unexpected successor node of atomic block begin: thread2EXIT is neither atomic block end nor error location. [2022-01-18 15:43:13,702 WARN L329 CfgBuilder]: Unexpected successor node of atomic block begin: thread3EXIT is neither atomic block end nor error location. [2022-01-18 15:43:13,702 WARN L329 CfgBuilder]: Unexpected successor node of atomic block begin: thread5EXIT is neither atomic block end nor error location. [2022-01-18 15:43:13,702 WARN L329 CfgBuilder]: Unexpected successor node of atomic block begin: thread6EXIT is neither atomic block end nor error location. [2022-01-18 15:43:13,707 INFO L202 PluginConnector]: Adding new model parallel-sum-2.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.01 03:43:13 BoogieIcfgContainer [2022-01-18 15:43:13,707 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-18 15:43:13,709 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-18 15:43:13,709 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-18 15:43:13,728 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-18 15:43:13,728 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "parallel-sum-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 03:43:13" (1/2) ... [2022-01-18 15:43:13,733 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@26fe1264 and model type parallel-sum-2.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.01 03:43:13, skipping insertion in model container [2022-01-18 15:43:13,733 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "parallel-sum-2.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.01 03:43:13" (2/2) ... [2022-01-18 15:43:13,734 INFO L111 eAbstractionObserver]: Analyzing ICFG parallel-sum-2.wvr.bpl [2022-01-18 15:43:13,737 WARN L149 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-01-18 15:43:13,737 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-01-18 15:43:13,737 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-18 15:43:13,737 INFO L513 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-01-18 15:43:13,818 INFO L148 ThreadInstanceAdder]: Constructed 18 joinOtherThreadTransitions. [2022-01-18 15:43:13,859 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-18 15:43:13,863 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2022-01-18 15:43:13,863 INFO L340 AbstractCegarLoop]: Starting to check reachability of 11 error locations. [2022-01-18 15:43:13,876 INFO L111 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 66 places, 55 transitions, 182 flow [2022-01-18 15:43:13,950 INFO L133 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 445 states, 444 states have (on average 3.7905405405405403) internal successors, (1683), 444 states have internal predecessors, (1683), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:43:13,952 INFO L276 IsEmpty]: Start isEmpty. Operand has 445 states, 444 states have (on average 3.7905405405405403) internal successors, (1683), 444 states have internal predecessors, (1683), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:43:13,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-01-18 15:43:13,970 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:43:13,971 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:43:13,971 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-01-18 15:43:13,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:43:13,976 INFO L85 PathProgramCache]: Analyzing trace with hash 614274337, now seen corresponding path program 1 times [2022-01-18 15:43:13,982 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:43:13,982 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1483607160] [2022-01-18 15:43:13,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:43:13,983 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:43:14,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:43:14,163 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:43:14,163 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:43:14,163 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1483607160] [2022-01-18 15:43:14,164 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1483607160] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-18 15:43:14,164 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-18 15:43:14,164 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-18 15:43:14,165 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1680037896] [2022-01-18 15:43:14,166 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-18 15:43:14,168 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-18 15:43:14,168 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:43:14,190 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-18 15:43:14,190 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-18 15:43:14,192 INFO L87 Difference]: Start difference. First operand has 445 states, 444 states have (on average 3.7905405405405403) internal successors, (1683), 444 states have internal predecessors, (1683), 0 states have call successors, (0), 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 5 states, 5 states have (on average 5.0) internal successors, (25), 4 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:43:14,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:43:14,393 INFO L93 Difference]: Finished difference Result 893 states and 3368 transitions. [2022-01-18 15:43:14,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-18 15:43:14,395 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 4 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-01-18 15:43:14,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:43:14,427 INFO L225 Difference]: With dead ends: 893 [2022-01-18 15:43:14,427 INFO L226 Difference]: Without dead ends: 874 [2022-01-18 15:43:14,446 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-01-18 15:43:14,460 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 38 mSDsluCounter, 101 mSDsCounter, 0 mSdLazyCounter, 135 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 135 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 135 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:43:14,461 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 48 Invalid, 135 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 135 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 15:43:14,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 874 states. [2022-01-18 15:43:14,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 874 to 598. [2022-01-18 15:43:14,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 598 states, 597 states have (on average 3.809045226130653) internal successors, (2274), 597 states have internal predecessors, (2274), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:43:14,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 598 states to 598 states and 2274 transitions. [2022-01-18 15:43:14,542 INFO L78 Accepts]: Start accepts. Automaton has 598 states and 2274 transitions. Word has length 25 [2022-01-18 15:43:14,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:43:14,543 INFO L470 AbstractCegarLoop]: Abstraction has 598 states and 2274 transitions. [2022-01-18 15:43:14,543 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 4 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:43:14,543 INFO L276 IsEmpty]: Start isEmpty. Operand 598 states and 2274 transitions. [2022-01-18 15:43:14,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-01-18 15:43:14,545 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:43:14,545 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:43:14,545 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-01-18 15:43:14,545 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-01-18 15:43:14,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:43:14,546 INFO L85 PathProgramCache]: Analyzing trace with hash -1825623495, now seen corresponding path program 2 times [2022-01-18 15:43:14,546 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:43:14,546 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [607977805] [2022-01-18 15:43:14,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:43:14,547 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:43:14,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:43:14,637 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:43:14,637 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:43:14,638 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [607977805] [2022-01-18 15:43:14,638 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [607977805] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-18 15:43:14,638 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-18 15:43:14,638 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-18 15:43:14,638 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [934008981] [2022-01-18 15:43:14,638 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-18 15:43:14,639 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-18 15:43:14,639 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:43:14,639 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-18 15:43:14,639 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-18 15:43:14,640 INFO L87 Difference]: Start difference. First operand 598 states and 2274 transitions. Second operand has 5 states, 5 states have (on average 5.0) internal successors, (25), 4 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:43:14,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:43:14,749 INFO L93 Difference]: Finished difference Result 872 states and 3319 transitions. [2022-01-18 15:43:14,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-18 15:43:14,749 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 4 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-01-18 15:43:14,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:43:14,754 INFO L225 Difference]: With dead ends: 872 [2022-01-18 15:43:14,754 INFO L226 Difference]: Without dead ends: 841 [2022-01-18 15:43:14,758 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-01-18 15:43:14,759 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 30 mSDsluCounter, 99 mSDsCounter, 0 mSdLazyCounter, 132 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 132 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 132 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:43:14,759 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 48 Invalid, 132 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 132 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 15:43:14,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 841 states. [2022-01-18 15:43:14,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 841 to 596. [2022-01-18 15:43:14,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 596 states, 595 states have (on average 3.7663865546218487) internal successors, (2241), 595 states have internal predecessors, (2241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:43:14,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 596 states to 596 states and 2241 transitions. [2022-01-18 15:43:14,797 INFO L78 Accepts]: Start accepts. Automaton has 596 states and 2241 transitions. Word has length 25 [2022-01-18 15:43:14,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:43:14,797 INFO L470 AbstractCegarLoop]: Abstraction has 596 states and 2241 transitions. [2022-01-18 15:43:14,797 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 4 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:43:14,798 INFO L276 IsEmpty]: Start isEmpty. Operand 596 states and 2241 transitions. [2022-01-18 15:43:14,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-01-18 15:43:14,799 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:43:14,799 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:43:14,800 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-01-18 15:43:14,801 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-01-18 15:43:14,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:43:14,803 INFO L85 PathProgramCache]: Analyzing trace with hash -1890170752, now seen corresponding path program 1 times [2022-01-18 15:43:14,804 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:43:14,804 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [313114438] [2022-01-18 15:43:14,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:43:14,804 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:43:14,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:43:14,833 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:43:14,834 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:43:14,834 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [313114438] [2022-01-18 15:43:14,834 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [313114438] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-18 15:43:14,834 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-18 15:43:14,834 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-18 15:43:14,834 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1620310220] [2022-01-18 15:43:14,834 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-18 15:43:14,835 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-18 15:43:14,835 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:43:14,835 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-18 15:43:14,835 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-18 15:43:14,835 INFO L87 Difference]: Start difference. First operand 596 states and 2241 transitions. Second operand has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:43:14,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:43:14,906 INFO L93 Difference]: Finished difference Result 867 states and 3197 transitions. [2022-01-18 15:43:14,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-18 15:43:14,906 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-01-18 15:43:14,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:43:14,910 INFO L225 Difference]: With dead ends: 867 [2022-01-18 15:43:14,910 INFO L226 Difference]: Without dead ends: 836 [2022-01-18 15:43:14,911 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-18 15:43:14,916 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 62 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 98 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 86 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:43:14,917 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [62 Valid, 55 Invalid, 98 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 86 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 15:43:14,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 836 states. [2022-01-18 15:43:14,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 836 to 734. [2022-01-18 15:43:14,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 734 states, 733 states have (on average 3.8663028649386084) internal successors, (2834), 733 states have internal predecessors, (2834), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:43:14,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 734 states to 734 states and 2834 transitions. [2022-01-18 15:43:14,939 INFO L78 Accepts]: Start accepts. Automaton has 734 states and 2834 transitions. Word has length 27 [2022-01-18 15:43:14,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:43:14,940 INFO L470 AbstractCegarLoop]: Abstraction has 734 states and 2834 transitions. [2022-01-18 15:43:14,940 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:43:14,940 INFO L276 IsEmpty]: Start isEmpty. Operand 734 states and 2834 transitions. [2022-01-18 15:43:14,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-01-18 15:43:14,942 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:43:14,942 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:43:14,942 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-01-18 15:43:14,942 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-01-18 15:43:14,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:43:14,943 INFO L85 PathProgramCache]: Analyzing trace with hash 153525504, now seen corresponding path program 2 times [2022-01-18 15:43:14,943 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:43:14,943 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [454333486] [2022-01-18 15:43:14,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:43:14,944 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:43:14,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:43:15,001 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:43:15,002 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:43:15,002 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [454333486] [2022-01-18 15:43:15,002 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [454333486] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-18 15:43:15,002 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-18 15:43:15,002 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-18 15:43:15,002 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1951730909] [2022-01-18 15:43:15,002 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-18 15:43:15,002 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-18 15:43:15,003 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:43:15,003 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-18 15:43:15,003 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-18 15:43:15,003 INFO L87 Difference]: Start difference. First operand 734 states and 2834 transitions. Second operand has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:43:15,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:43:15,064 INFO L93 Difference]: Finished difference Result 736 states and 2873 transitions. [2022-01-18 15:43:15,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-18 15:43:15,064 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-01-18 15:43:15,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:43:15,068 INFO L225 Difference]: With dead ends: 736 [2022-01-18 15:43:15,068 INFO L226 Difference]: Without dead ends: 655 [2022-01-18 15:43:15,068 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-18 15:43:15,071 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 32 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 87 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 84 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-18 15:43:15,071 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [32 Valid, 50 Invalid, 87 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 84 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-18 15:43:15,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 655 states. [2022-01-18 15:43:15,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 655 to 571. [2022-01-18 15:43:15,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 571 states, 570 states have (on average 3.8526315789473684) internal successors, (2196), 570 states have internal predecessors, (2196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:43:15,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 571 states to 571 states and 2196 transitions. [2022-01-18 15:43:15,087 INFO L78 Accepts]: Start accepts. Automaton has 571 states and 2196 transitions. Word has length 27 [2022-01-18 15:43:15,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:43:15,088 INFO L470 AbstractCegarLoop]: Abstraction has 571 states and 2196 transitions. [2022-01-18 15:43:15,088 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:43:15,088 INFO L276 IsEmpty]: Start isEmpty. Operand 571 states and 2196 transitions. [2022-01-18 15:43:15,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-01-18 15:43:15,089 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:43:15,089 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:43:15,089 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-01-18 15:43:15,090 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-01-18 15:43:15,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:43:15,091 INFO L85 PathProgramCache]: Analyzing trace with hash -481159728, now seen corresponding path program 1 times [2022-01-18 15:43:15,091 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:43:15,091 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2145363647] [2022-01-18 15:43:15,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:43:15,091 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:43:15,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:43:15,126 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:43:15,126 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:43:15,126 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2145363647] [2022-01-18 15:43:15,126 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2145363647] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:43:15,126 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1283309057] [2022-01-18 15:43:15,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:43:15,127 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:43:15,127 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:43:15,129 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:43:15,155 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-01-18 15:43:15,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:43:15,195 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-18 15:43:15,198 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:43:15,296 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:43:15,296 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:43:15,352 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:43:15,353 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1283309057] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:43:15,353 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:43:15,353 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 3 [2022-01-18 15:43:15,353 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1098024786] [2022-01-18 15:43:15,353 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:43:15,353 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-18 15:43:15,353 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:43:15,354 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-18 15:43:15,354 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-18 15:43:15,354 INFO L87 Difference]: Start difference. First operand 571 states and 2196 transitions. Second operand has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:43:15,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:43:15,418 INFO L93 Difference]: Finished difference Result 898 states and 3436 transitions. [2022-01-18 15:43:15,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-18 15:43:15,418 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-01-18 15:43:15,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:43:15,422 INFO L225 Difference]: With dead ends: 898 [2022-01-18 15:43:15,423 INFO L226 Difference]: Without dead ends: 838 [2022-01-18 15:43:15,425 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 51 SyntacticMatches, 2 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-18 15:43:15,428 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 38 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 85 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:43:15,431 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 49 Invalid, 85 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 82 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 15:43:15,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 838 states. [2022-01-18 15:43:15,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 838 to 754. [2022-01-18 15:43:15,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 754 states, 753 states have (on average 3.911022576361222) internal successors, (2945), 753 states have internal predecessors, (2945), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:43:15,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 754 states to 754 states and 2945 transitions. [2022-01-18 15:43:15,448 INFO L78 Accepts]: Start accepts. Automaton has 754 states and 2945 transitions. Word has length 27 [2022-01-18 15:43:15,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:43:15,449 INFO L470 AbstractCegarLoop]: Abstraction has 754 states and 2945 transitions. [2022-01-18 15:43:15,449 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:43:15,449 INFO L276 IsEmpty]: Start isEmpty. Operand 754 states and 2945 transitions. [2022-01-18 15:43:15,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-01-18 15:43:15,451 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:43:15,451 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:43:15,469 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-01-18 15:43:15,665 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:43:15,666 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-01-18 15:43:15,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:43:15,666 INFO L85 PathProgramCache]: Analyzing trace with hash -522499450, now seen corresponding path program 2 times [2022-01-18 15:43:15,666 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:43:15,666 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1494589734] [2022-01-18 15:43:15,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:43:15,666 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:43:15,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:43:15,700 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:43:15,700 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:43:15,700 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1494589734] [2022-01-18 15:43:15,700 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1494589734] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-18 15:43:15,700 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-18 15:43:15,700 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-18 15:43:15,701 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [673686678] [2022-01-18 15:43:15,701 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-18 15:43:15,701 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-18 15:43:15,701 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:43:15,701 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-18 15:43:15,701 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-18 15:43:15,701 INFO L87 Difference]: Start difference. First operand 754 states and 2945 transitions. Second operand has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:43:15,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:43:15,784 INFO L93 Difference]: Finished difference Result 854 states and 3195 transitions. [2022-01-18 15:43:15,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-18 15:43:15,784 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-01-18 15:43:15,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:43:15,789 INFO L225 Difference]: With dead ends: 854 [2022-01-18 15:43:15,789 INFO L226 Difference]: Without dead ends: 812 [2022-01-18 15:43:15,789 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-18 15:43:15,790 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 60 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 92 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:43:15,791 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [60 Valid, 52 Invalid, 92 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 15:43:15,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 812 states. [2022-01-18 15:43:15,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 812 to 733. [2022-01-18 15:43:15,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 733 states, 732 states have (on average 3.9139344262295084) internal successors, (2865), 732 states have internal predecessors, (2865), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:43:15,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 733 states to 733 states and 2865 transitions. [2022-01-18 15:43:15,815 INFO L78 Accepts]: Start accepts. Automaton has 733 states and 2865 transitions. Word has length 27 [2022-01-18 15:43:15,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:43:15,816 INFO L470 AbstractCegarLoop]: Abstraction has 733 states and 2865 transitions. [2022-01-18 15:43:15,816 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:43:15,816 INFO L276 IsEmpty]: Start isEmpty. Operand 733 states and 2865 transitions. [2022-01-18 15:43:15,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-01-18 15:43:15,821 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:43:15,821 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:43:15,821 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-01-18 15:43:15,821 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-01-18 15:43:15,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:43:15,822 INFO L85 PathProgramCache]: Analyzing trace with hash 1959647599, now seen corresponding path program 1 times [2022-01-18 15:43:15,822 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:43:15,822 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1888814769] [2022-01-18 15:43:15,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:43:15,822 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:43:15,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:43:15,990 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:43:15,991 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:43:15,991 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1888814769] [2022-01-18 15:43:15,991 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1888814769] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:43:15,991 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [495108219] [2022-01-18 15:43:15,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:43:15,991 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:43:15,991 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:43:15,992 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:43:15,995 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-01-18 15:43:16,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:43:16,034 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2022-01-18 15:43:16,037 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:43:16,381 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-01-18 15:43:16,457 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:43:16,457 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:43:16,615 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:43:16,615 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 22 [2022-01-18 15:43:16,638 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:43:16,639 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 7 [2022-01-18 15:43:16,696 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:43:16,696 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [495108219] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:43:16,696 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:43:16,696 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 21 [2022-01-18 15:43:16,696 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [617945212] [2022-01-18 15:43:16,697 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:43:16,698 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 15:43:16,698 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:43:16,698 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 15:43:16,699 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=407, Unknown=0, NotChecked=0, Total=462 [2022-01-18 15:43:16,699 INFO L87 Difference]: Start difference. First operand 733 states and 2865 transitions. Second operand has 22 states, 22 states have (on average 3.5454545454545454) internal successors, (78), 21 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:43:17,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:43:17,851 INFO L93 Difference]: Finished difference Result 1214 states and 4693 transitions. [2022-01-18 15:43:17,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-01-18 15:43:17,851 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.5454545454545454) internal successors, (78), 21 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-01-18 15:43:17,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:43:17,857 INFO L225 Difference]: With dead ends: 1214 [2022-01-18 15:43:17,857 INFO L226 Difference]: Without dead ends: 1195 [2022-01-18 15:43:17,858 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 43 SyntacticMatches, 3 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 258 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=184, Invalid=1222, Unknown=0, NotChecked=0, Total=1406 [2022-01-18 15:43:17,858 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 346 mSDsluCounter, 1166 mSDsCounter, 0 mSdLazyCounter, 1581 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 346 SdHoareTripleChecker+Valid, 452 SdHoareTripleChecker+Invalid, 1622 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 1581 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-18 15:43:17,858 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [346 Valid, 452 Invalid, 1622 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 1581 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-18 15:43:17,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1195 states. [2022-01-18 15:43:17,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1195 to 839. [2022-01-18 15:43:17,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 839 states, 838 states have (on average 3.908114558472554) internal successors, (3275), 838 states have internal predecessors, (3275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:43:17,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 839 states to 839 states and 3275 transitions. [2022-01-18 15:43:17,878 INFO L78 Accepts]: Start accepts. Automaton has 839 states and 3275 transitions. Word has length 29 [2022-01-18 15:43:17,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:43:17,878 INFO L470 AbstractCegarLoop]: Abstraction has 839 states and 3275 transitions. [2022-01-18 15:43:17,878 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 3.5454545454545454) internal successors, (78), 21 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:43:17,878 INFO L276 IsEmpty]: Start isEmpty. Operand 839 states and 3275 transitions. [2022-01-18 15:43:17,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-01-18 15:43:17,880 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:43:17,880 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:43:17,896 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-01-18 15:43:18,096 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2022-01-18 15:43:18,097 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-01-18 15:43:18,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:43:18,097 INFO L85 PathProgramCache]: Analyzing trace with hash 1724936761, now seen corresponding path program 2 times [2022-01-18 15:43:18,097 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:43:18,097 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [131670469] [2022-01-18 15:43:18,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:43:18,097 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:43:18,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:43:18,214 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:43:18,214 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:43:18,214 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [131670469] [2022-01-18 15:43:18,214 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [131670469] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:43:18,215 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [328940702] [2022-01-18 15:43:18,215 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 15:43:18,215 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:43:18,215 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:43:18,216 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:43:18,217 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-01-18 15:43:18,251 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:43:18,251 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:43:18,252 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2022-01-18 15:43:18,254 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:43:18,503 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:43:18,503 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 21 [2022-01-18 15:43:18,673 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:43:18,673 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:43:18,819 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:43:18,819 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [328940702] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:43:18,819 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:43:18,819 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 19 [2022-01-18 15:43:18,819 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [484266404] [2022-01-18 15:43:18,819 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:43:18,820 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 15:43:18,820 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:43:18,820 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 15:43:18,820 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=329, Unknown=0, NotChecked=0, Total=380 [2022-01-18 15:43:18,821 INFO L87 Difference]: Start difference. First operand 839 states and 3275 transitions. Second operand has 20 states, 20 states have (on average 2.9) internal successors, (58), 19 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 15:43:19,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:43:19,318 INFO L93 Difference]: Finished difference Result 1161 states and 4488 transitions. [2022-01-18 15:43:19,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-18 15:43:19,318 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.9) internal successors, (58), 19 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 29 [2022-01-18 15:43:19,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:43:19,323 INFO L225 Difference]: With dead ends: 1161 [2022-01-18 15:43:19,324 INFO L226 Difference]: Without dead ends: 1142 [2022-01-18 15:43:19,324 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 45 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=92, Invalid=508, Unknown=0, NotChecked=0, Total=600 [2022-01-18 15:43:19,324 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 147 mSDsluCounter, 738 mSDsCounter, 0 mSdLazyCounter, 978 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 147 SdHoareTripleChecker+Valid, 291 SdHoareTripleChecker+Invalid, 981 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 978 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 15:43:19,324 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [147 Valid, 291 Invalid, 981 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 978 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-18 15:43:19,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1142 states. [2022-01-18 15:43:19,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1142 to 842. [2022-01-18 15:43:19,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 842 states, 841 states have (on average 3.906064209274673) internal successors, (3285), 841 states have internal predecessors, (3285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:43:19,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 842 states to 842 states and 3285 transitions. [2022-01-18 15:43:19,346 INFO L78 Accepts]: Start accepts. Automaton has 842 states and 3285 transitions. Word has length 29 [2022-01-18 15:43:19,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:43:19,346 INFO L470 AbstractCegarLoop]: Abstraction has 842 states and 3285 transitions. [2022-01-18 15:43:19,347 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.9) internal successors, (58), 19 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 15:43:19,347 INFO L276 IsEmpty]: Start isEmpty. Operand 842 states and 3285 transitions. [2022-01-18 15:43:19,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-01-18 15:43:19,348 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:43:19,348 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:43:19,367 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-01-18 15:43:19,563 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:43:19,563 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-01-18 15:43:19,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:43:19,564 INFO L85 PathProgramCache]: Analyzing trace with hash 1161339337, now seen corresponding path program 3 times [2022-01-18 15:43:19,564 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:43:19,564 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1092857873] [2022-01-18 15:43:19,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:43:19,564 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:43:19,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:43:19,670 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:43:19,670 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:43:19,671 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1092857873] [2022-01-18 15:43:19,671 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1092857873] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:43:19,671 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [256241259] [2022-01-18 15:43:19,671 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 15:43:19,671 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:43:19,671 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:43:19,672 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:43:19,673 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-01-18 15:43:19,705 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-01-18 15:43:19,706 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:43:19,706 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2022-01-18 15:43:19,707 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:43:19,921 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:43:19,921 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 21 [2022-01-18 15:43:20,059 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:43:20,059 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:43:20,206 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:43:20,206 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [256241259] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:43:20,207 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:43:20,207 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 19 [2022-01-18 15:43:20,207 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [55766201] [2022-01-18 15:43:20,207 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:43:20,207 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 15:43:20,207 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:43:20,207 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 15:43:20,208 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=325, Unknown=0, NotChecked=0, Total=380 [2022-01-18 15:43:20,208 INFO L87 Difference]: Start difference. First operand 842 states and 3285 transitions. Second operand has 20 states, 20 states have (on average 2.9) internal successors, (58), 19 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 15:43:20,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:43:20,801 INFO L93 Difference]: Finished difference Result 1188 states and 4549 transitions. [2022-01-18 15:43:20,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-18 15:43:20,802 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.9) internal successors, (58), 19 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 29 [2022-01-18 15:43:20,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:43:20,807 INFO L225 Difference]: With dead ends: 1188 [2022-01-18 15:43:20,807 INFO L226 Difference]: Without dead ends: 1169 [2022-01-18 15:43:20,807 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 45 SyntacticMatches, 3 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=105, Invalid=545, Unknown=0, NotChecked=0, Total=650 [2022-01-18 15:43:20,808 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 198 mSDsluCounter, 825 mSDsCounter, 0 mSdLazyCounter, 1101 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 198 SdHoareTripleChecker+Valid, 330 SdHoareTripleChecker+Invalid, 1111 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 1101 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 15:43:20,808 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [198 Valid, 330 Invalid, 1111 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 1101 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-18 15:43:20,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1169 states. [2022-01-18 15:43:20,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1169 to 850. [2022-01-18 15:43:20,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 850 states, 849 states have (on average 3.895170789163722) internal successors, (3307), 849 states have internal predecessors, (3307), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:43:20,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 850 states to 850 states and 3307 transitions. [2022-01-18 15:43:20,827 INFO L78 Accepts]: Start accepts. Automaton has 850 states and 3307 transitions. Word has length 29 [2022-01-18 15:43:20,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:43:20,827 INFO L470 AbstractCegarLoop]: Abstraction has 850 states and 3307 transitions. [2022-01-18 15:43:20,827 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.9) internal successors, (58), 19 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 15:43:20,827 INFO L276 IsEmpty]: Start isEmpty. Operand 850 states and 3307 transitions. [2022-01-18 15:43:20,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-01-18 15:43:20,829 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:43:20,829 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:43:20,863 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-01-18 15:43:21,049 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:43:21,049 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-01-18 15:43:21,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:43:21,050 INFO L85 PathProgramCache]: Analyzing trace with hash 790114331, now seen corresponding path program 4 times [2022-01-18 15:43:21,050 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:43:21,050 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [270811563] [2022-01-18 15:43:21,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:43:21,050 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:43:21,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:43:21,155 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:43:21,156 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:43:21,156 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [270811563] [2022-01-18 15:43:21,156 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [270811563] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:43:21,156 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [626788980] [2022-01-18 15:43:21,156 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 15:43:21,156 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:43:21,156 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:43:21,157 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:43:21,164 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-01-18 15:43:21,205 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 15:43:21,205 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:43:21,206 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2022-01-18 15:43:21,207 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:43:21,400 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2022-01-18 15:43:21,506 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:43:21,506 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:43:21,639 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:43:21,640 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 22 [2022-01-18 15:43:21,649 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:43:21,650 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 7 [2022-01-18 15:43:21,706 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:43:21,706 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [626788980] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:43:21,706 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:43:21,706 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 19 [2022-01-18 15:43:21,706 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1160147852] [2022-01-18 15:43:21,706 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:43:21,707 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 15:43:21,707 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:43:21,707 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 15:43:21,707 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=323, Unknown=0, NotChecked=0, Total=380 [2022-01-18 15:43:21,707 INFO L87 Difference]: Start difference. First operand 850 states and 3307 transitions. Second operand has 20 states, 20 states have (on average 3.7) internal successors, (74), 19 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:43:22,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:43:22,724 INFO L93 Difference]: Finished difference Result 1755 states and 6735 transitions. [2022-01-18 15:43:22,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-01-18 15:43:22,725 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.7) internal successors, (74), 19 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-01-18 15:43:22,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:43:22,732 INFO L225 Difference]: With dead ends: 1755 [2022-01-18 15:43:22,732 INFO L226 Difference]: Without dead ends: 1727 [2022-01-18 15:43:22,733 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 45 SyntacticMatches, 3 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 259 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=181, Invalid=1079, Unknown=0, NotChecked=0, Total=1260 [2022-01-18 15:43:22,733 INFO L933 BasicCegarLoop]: 44 mSDtfsCounter, 316 mSDsluCounter, 1369 mSDsCounter, 0 mSdLazyCounter, 1811 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 316 SdHoareTripleChecker+Valid, 540 SdHoareTripleChecker+Invalid, 1838 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 1811 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-18 15:43:22,734 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [316 Valid, 540 Invalid, 1838 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 1811 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-18 15:43:22,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1727 states. [2022-01-18 15:43:22,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1727 to 963. [2022-01-18 15:43:22,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 963 states, 962 states have (on average 4.016632016632016) internal successors, (3864), 962 states have internal predecessors, (3864), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:43:22,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 963 states to 963 states and 3864 transitions. [2022-01-18 15:43:22,756 INFO L78 Accepts]: Start accepts. Automaton has 963 states and 3864 transitions. Word has length 29 [2022-01-18 15:43:22,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:43:22,756 INFO L470 AbstractCegarLoop]: Abstraction has 963 states and 3864 transitions. [2022-01-18 15:43:22,756 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.7) internal successors, (74), 19 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:43:22,756 INFO L276 IsEmpty]: Start isEmpty. Operand 963 states and 3864 transitions. [2022-01-18 15:43:22,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-01-18 15:43:22,759 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:43:22,759 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:43:22,775 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-01-18 15:43:22,971 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-01-18 15:43:22,971 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-01-18 15:43:22,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:43:22,972 INFO L85 PathProgramCache]: Analyzing trace with hash -2099674321, now seen corresponding path program 5 times [2022-01-18 15:43:22,972 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:43:22,972 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [800248691] [2022-01-18 15:43:22,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:43:22,972 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:43:22,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:43:23,078 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:43:23,078 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:43:23,078 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [800248691] [2022-01-18 15:43:23,078 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [800248691] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:43:23,078 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1071641869] [2022-01-18 15:43:23,078 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 15:43:23,078 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:43:23,079 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:43:23,079 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:43:23,080 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-01-18 15:43:23,112 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:43:23,113 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:43:23,113 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 31 conjunts are in the unsatisfiable core [2022-01-18 15:43:23,114 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:43:23,457 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 9 [2022-01-18 15:43:23,591 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:43:23,591 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:43:23,740 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:43:23,740 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 22 [2022-01-18 15:43:23,750 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:43:23,751 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 7 [2022-01-18 15:43:23,802 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:43:23,803 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1071641869] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:43:23,803 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:43:23,803 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 8] total 22 [2022-01-18 15:43:23,803 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1405171598] [2022-01-18 15:43:23,803 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:43:23,803 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-18 15:43:23,803 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:43:23,803 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-18 15:43:23,804 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=437, Unknown=0, NotChecked=0, Total=506 [2022-01-18 15:43:23,804 INFO L87 Difference]: Start difference. First operand 963 states and 3864 transitions. Second operand has 23 states, 23 states have (on average 3.391304347826087) internal successors, (78), 22 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:43:25,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:43:25,402 INFO L93 Difference]: Finished difference Result 2261 states and 8768 transitions. [2022-01-18 15:43:25,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-01-18 15:43:25,402 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 3.391304347826087) internal successors, (78), 22 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-01-18 15:43:25,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:43:25,412 INFO L225 Difference]: With dead ends: 2261 [2022-01-18 15:43:25,412 INFO L226 Difference]: Without dead ends: 2188 [2022-01-18 15:43:25,413 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 42 SyntacticMatches, 3 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 706 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=340, Invalid=2312, Unknown=0, NotChecked=0, Total=2652 [2022-01-18 15:43:25,413 INFO L933 BasicCegarLoop]: 61 mSDtfsCounter, 517 mSDsluCounter, 1895 mSDsCounter, 0 mSdLazyCounter, 2541 mSolverCounterSat, 94 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 517 SdHoareTripleChecker+Valid, 742 SdHoareTripleChecker+Invalid, 2635 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 94 IncrementalHoareTripleChecker+Valid, 2541 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-01-18 15:43:25,413 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [517 Valid, 742 Invalid, 2635 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [94 Valid, 2541 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-01-18 15:43:25,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2188 states. [2022-01-18 15:43:25,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2188 to 947. [2022-01-18 15:43:25,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 947 states, 946 states have (on average 4.028541226215645) internal successors, (3811), 946 states have internal predecessors, (3811), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:43:25,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 947 states to 947 states and 3811 transitions. [2022-01-18 15:43:25,437 INFO L78 Accepts]: Start accepts. Automaton has 947 states and 3811 transitions. Word has length 29 [2022-01-18 15:43:25,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:43:25,438 INFO L470 AbstractCegarLoop]: Abstraction has 947 states and 3811 transitions. [2022-01-18 15:43:25,438 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 3.391304347826087) internal successors, (78), 22 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:43:25,438 INFO L276 IsEmpty]: Start isEmpty. Operand 947 states and 3811 transitions. [2022-01-18 15:43:25,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-01-18 15:43:25,440 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:43:25,440 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:43:25,471 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-01-18 15:43:25,654 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:43:25,655 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-01-18 15:43:25,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:43:25,655 INFO L85 PathProgramCache]: Analyzing trace with hash -1181516803, now seen corresponding path program 6 times [2022-01-18 15:43:25,655 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:43:25,655 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [834113524] [2022-01-18 15:43:25,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:43:25,655 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:43:25,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:43:25,767 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:43:25,768 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:43:25,768 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [834113524] [2022-01-18 15:43:25,768 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [834113524] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:43:25,768 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [937622829] [2022-01-18 15:43:25,768 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 15:43:25,768 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:43:25,768 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:43:25,769 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:43:25,769 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-01-18 15:43:25,806 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 15:43:25,806 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:43:25,806 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 23 conjunts are in the unsatisfiable core [2022-01-18 15:43:25,807 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:43:25,908 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:43:25,909 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2022-01-18 15:43:26,092 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:43:26,092 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:43:26,274 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:43:26,274 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [937622829] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:43:26,274 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:43:26,275 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 18 [2022-01-18 15:43:26,275 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [7815447] [2022-01-18 15:43:26,275 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:43:26,275 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-18 15:43:26,275 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:43:26,275 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-18 15:43:26,276 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=274, Unknown=0, NotChecked=0, Total=342 [2022-01-18 15:43:26,276 INFO L87 Difference]: Start difference. First operand 947 states and 3811 transitions. Second operand has 19 states, 19 states have (on average 2.8421052631578947) internal successors, (54), 18 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:43:26,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:43:26,646 INFO L93 Difference]: Finished difference Result 1340 states and 5308 transitions. [2022-01-18 15:43:26,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-18 15:43:26,646 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.8421052631578947) internal successors, (54), 18 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-01-18 15:43:26,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:43:26,653 INFO L225 Difference]: With dead ends: 1340 [2022-01-18 15:43:26,653 INFO L226 Difference]: Without dead ends: 1321 [2022-01-18 15:43:26,653 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 45 SyntacticMatches, 4 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 164 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=138, Invalid=462, Unknown=0, NotChecked=0, Total=600 [2022-01-18 15:43:26,653 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 234 mSDsluCounter, 464 mSDsCounter, 0 mSdLazyCounter, 690 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 234 SdHoareTripleChecker+Valid, 194 SdHoareTripleChecker+Invalid, 696 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 690 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 15:43:26,654 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [234 Valid, 194 Invalid, 696 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 690 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 15:43:26,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1321 states. [2022-01-18 15:43:26,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1321 to 1034. [2022-01-18 15:43:26,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1034 states, 1033 states have (on average 4.078412391093901) internal successors, (4213), 1033 states have internal predecessors, (4213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:43:26,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1034 states to 1034 states and 4213 transitions. [2022-01-18 15:43:26,678 INFO L78 Accepts]: Start accepts. Automaton has 1034 states and 4213 transitions. Word has length 29 [2022-01-18 15:43:26,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:43:26,678 INFO L470 AbstractCegarLoop]: Abstraction has 1034 states and 4213 transitions. [2022-01-18 15:43:26,678 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.8421052631578947) internal successors, (54), 18 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:43:26,678 INFO L276 IsEmpty]: Start isEmpty. Operand 1034 states and 4213 transitions. [2022-01-18 15:43:26,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-01-18 15:43:26,680 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:43:26,680 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:43:26,713 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-01-18 15:43:26,887 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:43:26,887 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-01-18 15:43:26,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:43:26,888 INFO L85 PathProgramCache]: Analyzing trace with hash 121755803, now seen corresponding path program 7 times [2022-01-18 15:43:26,888 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:43:26,888 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1586154317] [2022-01-18 15:43:26,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:43:26,888 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:43:26,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:43:26,994 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:43:26,994 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:43:26,994 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1586154317] [2022-01-18 15:43:26,994 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1586154317] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:43:26,994 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [462209848] [2022-01-18 15:43:26,994 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 15:43:26,995 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:43:26,995 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:43:26,995 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:43:26,996 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-01-18 15:43:27,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:43:27,028 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2022-01-18 15:43:27,031 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:43:27,187 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-01-18 15:43:27,316 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:43:27,317 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:43:27,455 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:43:27,456 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 22 [2022-01-18 15:43:27,465 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:43:27,466 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 7 [2022-01-18 15:43:27,510 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:43:27,511 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [462209848] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:43:27,511 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:43:27,511 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 19 [2022-01-18 15:43:27,511 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1482267035] [2022-01-18 15:43:27,511 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:43:27,511 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 15:43:27,511 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:43:27,511 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 15:43:27,511 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=311, Unknown=0, NotChecked=0, Total=380 [2022-01-18 15:43:27,512 INFO L87 Difference]: Start difference. First operand 1034 states and 4213 transitions. Second operand has 20 states, 20 states have (on average 3.7) internal successors, (74), 19 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:43:28,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:43:28,290 INFO L93 Difference]: Finished difference Result 1788 states and 6981 transitions. [2022-01-18 15:43:28,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-01-18 15:43:28,291 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.7) internal successors, (74), 19 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-01-18 15:43:28,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:43:28,305 INFO L225 Difference]: With dead ends: 1788 [2022-01-18 15:43:28,305 INFO L226 Difference]: Without dead ends: 1760 [2022-01-18 15:43:28,306 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 45 SyntacticMatches, 3 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 249 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=202, Invalid=854, Unknown=0, NotChecked=0, Total=1056 [2022-01-18 15:43:28,306 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 351 mSDsluCounter, 1204 mSDsCounter, 0 mSdLazyCounter, 1580 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 351 SdHoareTripleChecker+Valid, 455 SdHoareTripleChecker+Invalid, 1616 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 1580 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 15:43:28,307 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [351 Valid, 455 Invalid, 1616 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 1580 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-18 15:43:28,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1760 states. [2022-01-18 15:43:28,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1760 to 1124. [2022-01-18 15:43:28,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1124 states, 1123 states have (on average 4.140694568121104) internal successors, (4650), 1123 states have internal predecessors, (4650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:43:28,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1124 states to 1124 states and 4650 transitions. [2022-01-18 15:43:28,331 INFO L78 Accepts]: Start accepts. Automaton has 1124 states and 4650 transitions. Word has length 29 [2022-01-18 15:43:28,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:43:28,331 INFO L470 AbstractCegarLoop]: Abstraction has 1124 states and 4650 transitions. [2022-01-18 15:43:28,331 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.7) internal successors, (74), 19 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:43:28,331 INFO L276 IsEmpty]: Start isEmpty. Operand 1124 states and 4650 transitions. [2022-01-18 15:43:28,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-01-18 15:43:28,334 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:43:28,334 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:43:28,352 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 15:43:28,543 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,SelfDestructingSolverStorable12 [2022-01-18 15:43:28,543 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-01-18 15:43:28,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:43:28,544 INFO L85 PathProgramCache]: Analyzing trace with hash 68369283, now seen corresponding path program 8 times [2022-01-18 15:43:28,544 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:43:28,544 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [614952058] [2022-01-18 15:43:28,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:43:28,544 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:43:28,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:43:28,643 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:43:28,643 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:43:28,644 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [614952058] [2022-01-18 15:43:28,644 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [614952058] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:43:28,644 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [791315019] [2022-01-18 15:43:28,644 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 15:43:28,644 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:43:28,644 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:43:28,645 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:43:28,646 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-01-18 15:43:28,684 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:43:28,684 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:43:28,685 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2022-01-18 15:43:28,691 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:43:28,827 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:43:28,827 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2022-01-18 15:43:29,035 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:43:29,036 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:43:29,213 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:43:29,213 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [791315019] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:43:29,213 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:43:29,213 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 9] total 19 [2022-01-18 15:43:29,213 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1913118352] [2022-01-18 15:43:29,213 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:43:29,213 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 15:43:29,213 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:43:29,214 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 15:43:29,214 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=308, Unknown=0, NotChecked=0, Total=380 [2022-01-18 15:43:29,214 INFO L87 Difference]: Start difference. First operand 1124 states and 4650 transitions. Second operand has 20 states, 20 states have (on average 2.9) internal successors, (58), 19 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 15:43:29,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:43:29,706 INFO L93 Difference]: Finished difference Result 1434 states and 5758 transitions. [2022-01-18 15:43:29,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-01-18 15:43:29,706 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.9) internal successors, (58), 19 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 29 [2022-01-18 15:43:29,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:43:29,716 INFO L225 Difference]: With dead ends: 1434 [2022-01-18 15:43:29,716 INFO L226 Difference]: Without dead ends: 1411 [2022-01-18 15:43:29,717 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 45 SyntacticMatches, 3 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 194 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=172, Invalid=584, Unknown=0, NotChecked=0, Total=756 [2022-01-18 15:43:29,717 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 229 mSDsluCounter, 739 mSDsCounter, 0 mSdLazyCounter, 1020 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 229 SdHoareTripleChecker+Valid, 282 SdHoareTripleChecker+Invalid, 1029 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 1020 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 15:43:29,717 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [229 Valid, 282 Invalid, 1029 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 1020 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 15:43:29,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1411 states. [2022-01-18 15:43:29,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1411 to 1084. [2022-01-18 15:43:29,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1084 states, 1083 states have (on average 4.1320406278855035) internal successors, (4475), 1083 states have internal predecessors, (4475), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:43:29,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1084 states to 1084 states and 4475 transitions. [2022-01-18 15:43:29,747 INFO L78 Accepts]: Start accepts. Automaton has 1084 states and 4475 transitions. Word has length 29 [2022-01-18 15:43:29,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:43:29,747 INFO L470 AbstractCegarLoop]: Abstraction has 1084 states and 4475 transitions. [2022-01-18 15:43:29,747 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.9) internal successors, (58), 19 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 15:43:29,747 INFO L276 IsEmpty]: Start isEmpty. Operand 1084 states and 4475 transitions. [2022-01-18 15:43:29,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-01-18 15:43:29,750 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:43:29,750 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:43:29,768 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-01-18 15:43:29,965 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-01-18 15:43:29,966 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-01-18 15:43:29,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:43:29,966 INFO L85 PathProgramCache]: Analyzing trace with hash 2131198379, now seen corresponding path program 9 times [2022-01-18 15:43:29,966 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:43:29,966 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [916682536] [2022-01-18 15:43:29,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:43:29,966 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:43:29,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:43:30,088 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:43:30,088 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:43:30,088 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [916682536] [2022-01-18 15:43:30,088 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [916682536] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:43:30,088 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1131616568] [2022-01-18 15:43:30,088 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 15:43:30,088 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:43:30,088 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:43:30,089 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:43:30,097 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-01-18 15:43:30,121 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 15:43:30,121 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:43:30,122 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 23 conjunts are in the unsatisfiable core [2022-01-18 15:43:30,122 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:43:30,207 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:43:30,207 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2022-01-18 15:43:30,348 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:43:30,349 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:43:30,503 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:43:30,503 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1131616568] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:43:30,503 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:43:30,503 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 18 [2022-01-18 15:43:30,503 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1336963999] [2022-01-18 15:43:30,503 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:43:30,504 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-18 15:43:30,504 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:43:30,504 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-18 15:43:30,504 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2022-01-18 15:43:30,504 INFO L87 Difference]: Start difference. First operand 1084 states and 4475 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 15:43:30,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:43:30,906 INFO L93 Difference]: Finished difference Result 1290 states and 5264 transitions. [2022-01-18 15:43:30,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-18 15:43:30,906 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 29 [2022-01-18 15:43:30,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:43:30,909 INFO L225 Difference]: With dead ends: 1290 [2022-01-18 15:43:30,910 INFO L226 Difference]: Without dead ends: 1275 [2022-01-18 15:43:30,910 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 45 SyntacticMatches, 4 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=81, Invalid=425, Unknown=0, NotChecked=0, Total=506 [2022-01-18 15:43:30,910 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 86 mSDsluCounter, 762 mSDsCounter, 0 mSdLazyCounter, 1077 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 315 SdHoareTripleChecker+Invalid, 1077 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 1077 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 15:43:30,910 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [86 Valid, 315 Invalid, 1077 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 1077 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 15:43:30,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1275 states. [2022-01-18 15:43:30,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1275 to 1090. [2022-01-18 15:43:30,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1090 states, 1089 states have (on average 4.124885215794307) internal successors, (4492), 1089 states have internal predecessors, (4492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:43:30,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1090 states to 1090 states and 4492 transitions. [2022-01-18 15:43:30,929 INFO L78 Accepts]: Start accepts. Automaton has 1090 states and 4492 transitions. Word has length 29 [2022-01-18 15:43:30,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:43:30,929 INFO L470 AbstractCegarLoop]: Abstraction has 1090 states and 4492 transitions. [2022-01-18 15:43:30,929 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 15:43:30,929 INFO L276 IsEmpty]: Start isEmpty. Operand 1090 states and 4492 transitions. [2022-01-18 15:43:30,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-01-18 15:43:30,932 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:43:30,932 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:43:30,951 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-01-18 15:43:31,143 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,SelfDestructingSolverStorable14 [2022-01-18 15:43:31,143 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-01-18 15:43:31,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:43:31,144 INFO L85 PathProgramCache]: Analyzing trace with hash -79176119, now seen corresponding path program 10 times [2022-01-18 15:43:31,144 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:43:31,144 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [937799867] [2022-01-18 15:43:31,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:43:31,144 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:43:31,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:43:31,245 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:43:31,245 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:43:31,245 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [937799867] [2022-01-18 15:43:31,245 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [937799867] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:43:31,245 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1172023153] [2022-01-18 15:43:31,245 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 15:43:31,245 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:43:31,245 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:43:31,246 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:43:31,246 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-01-18 15:43:31,277 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 15:43:31,278 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:43:31,278 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2022-01-18 15:43:31,279 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:43:31,431 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-01-18 15:43:31,553 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:43:31,553 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:43:31,676 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:43:31,676 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 22 [2022-01-18 15:43:31,687 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:43:31,688 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 7 [2022-01-18 15:43:31,753 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:43:31,753 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1172023153] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:43:31,753 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:43:31,753 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 19 [2022-01-18 15:43:31,754 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1448993740] [2022-01-18 15:43:31,754 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:43:31,754 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 15:43:31,754 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:43:31,754 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 15:43:31,754 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=317, Unknown=0, NotChecked=0, Total=380 [2022-01-18 15:43:31,754 INFO L87 Difference]: Start difference. First operand 1090 states and 4492 transitions. Second operand has 20 states, 20 states have (on average 3.65) internal successors, (73), 19 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:43:32,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:43:32,599 INFO L93 Difference]: Finished difference Result 1640 states and 6539 transitions. [2022-01-18 15:43:32,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-01-18 15:43:32,599 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.65) internal successors, (73), 19 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-01-18 15:43:32,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:43:32,605 INFO L225 Difference]: With dead ends: 1640 [2022-01-18 15:43:32,605 INFO L226 Difference]: Without dead ends: 1616 [2022-01-18 15:43:32,605 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 45 SyntacticMatches, 3 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 198 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=162, Invalid=830, Unknown=0, NotChecked=0, Total=992 [2022-01-18 15:43:32,606 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 338 mSDsluCounter, 1053 mSDsCounter, 0 mSdLazyCounter, 1361 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 338 SdHoareTripleChecker+Valid, 424 SdHoareTripleChecker+Invalid, 1407 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 1361 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 15:43:32,606 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [338 Valid, 424 Invalid, 1407 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 1361 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-18 15:43:32,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1616 states. [2022-01-18 15:43:32,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1616 to 1094. [2022-01-18 15:43:32,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1094 states, 1093 states have (on average 4.12259835315645) internal successors, (4506), 1093 states have internal predecessors, (4506), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:43:32,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1094 states to 1094 states and 4506 transitions. [2022-01-18 15:43:32,632 INFO L78 Accepts]: Start accepts. Automaton has 1094 states and 4506 transitions. Word has length 29 [2022-01-18 15:43:32,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:43:32,633 INFO L470 AbstractCegarLoop]: Abstraction has 1094 states and 4506 transitions. [2022-01-18 15:43:32,633 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.65) internal successors, (73), 19 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:43:32,633 INFO L276 IsEmpty]: Start isEmpty. Operand 1094 states and 4506 transitions. [2022-01-18 15:43:32,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-01-18 15:43:32,636 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:43:32,636 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:43:32,678 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-01-18 15:43:32,848 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,SelfDestructingSolverStorable15 [2022-01-18 15:43:32,849 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-01-18 15:43:32,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:43:32,849 INFO L85 PathProgramCache]: Analyzing trace with hash 1082425977, now seen corresponding path program 11 times [2022-01-18 15:43:32,849 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:43:32,849 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2122355109] [2022-01-18 15:43:32,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:43:32,849 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:43:32,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:43:32,961 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:43:32,962 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:43:32,962 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2122355109] [2022-01-18 15:43:32,962 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2122355109] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:43:32,962 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1813559978] [2022-01-18 15:43:32,962 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 15:43:32,962 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:43:32,962 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:43:32,963 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:43:32,964 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-01-18 15:43:32,994 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 15:43:32,994 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:43:32,994 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 31 conjunts are in the unsatisfiable core [2022-01-18 15:43:32,995 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:43:33,122 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 7 [2022-01-18 15:43:33,288 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:43:33,288 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:43:33,403 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:43:33,403 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 22 [2022-01-18 15:43:33,413 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:43:33,414 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 7 [2022-01-18 15:43:33,458 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:43:33,459 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1813559978] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:43:33,459 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:43:33,459 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 8] total 21 [2022-01-18 15:43:33,459 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1030266286] [2022-01-18 15:43:33,459 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:43:33,459 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 15:43:33,459 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:43:33,459 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 15:43:33,459 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=386, Unknown=0, NotChecked=0, Total=462 [2022-01-18 15:43:33,459 INFO L87 Difference]: Start difference. First operand 1094 states and 4506 transitions. Second operand has 22 states, 22 states have (on average 3.5454545454545454) internal successors, (78), 21 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:43:34,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:43:34,513 INFO L93 Difference]: Finished difference Result 2131 states and 8371 transitions. [2022-01-18 15:43:34,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-01-18 15:43:34,514 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.5454545454545454) internal successors, (78), 21 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-01-18 15:43:34,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:43:34,520 INFO L225 Difference]: With dead ends: 2131 [2022-01-18 15:43:34,520 INFO L226 Difference]: Without dead ends: 2093 [2022-01-18 15:43:34,520 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 43 SyntacticMatches, 3 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 452 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=288, Invalid=1434, Unknown=0, NotChecked=0, Total=1722 [2022-01-18 15:43:34,521 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 504 mSDsluCounter, 1331 mSDsCounter, 0 mSdLazyCounter, 1771 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 504 SdHoareTripleChecker+Valid, 512 SdHoareTripleChecker+Invalid, 1843 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 1771 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 15:43:34,521 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [504 Valid, 512 Invalid, 1843 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 1771 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-18 15:43:34,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2093 states. [2022-01-18 15:43:34,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2093 to 1262. [2022-01-18 15:43:34,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1262 states, 1261 states have (on average 4.207771609833466) internal successors, (5306), 1261 states have internal predecessors, (5306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:43:34,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1262 states to 1262 states and 5306 transitions. [2022-01-18 15:43:34,548 INFO L78 Accepts]: Start accepts. Automaton has 1262 states and 5306 transitions. Word has length 29 [2022-01-18 15:43:34,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:43:34,548 INFO L470 AbstractCegarLoop]: Abstraction has 1262 states and 5306 transitions. [2022-01-18 15:43:34,549 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 3.5454545454545454) internal successors, (78), 21 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:43:34,549 INFO L276 IsEmpty]: Start isEmpty. Operand 1262 states and 5306 transitions. [2022-01-18 15:43:34,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-01-18 15:43:34,551 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:43:34,551 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:43:34,569 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-01-18 15:43:34,769 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,SelfDestructingSolverStorable16 [2022-01-18 15:43:34,769 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-01-18 15:43:34,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:43:34,770 INFO L85 PathProgramCache]: Analyzing trace with hash -1909268713, now seen corresponding path program 12 times [2022-01-18 15:43:34,770 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:43:34,770 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1951861045] [2022-01-18 15:43:34,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:43:34,770 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:43:34,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:43:34,866 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:43:34,866 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:43:34,867 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1951861045] [2022-01-18 15:43:34,867 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1951861045] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:43:34,867 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [706555838] [2022-01-18 15:43:34,867 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 15:43:34,867 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:43:34,867 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:43:34,868 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:43:34,869 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-01-18 15:43:34,900 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 15:43:34,900 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:43:34,900 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 23 conjunts are in the unsatisfiable core [2022-01-18 15:43:34,901 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:43:34,989 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:43:34,989 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2022-01-18 15:43:35,135 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:43:35,135 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:43:35,276 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:43:35,276 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [706555838] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:43:35,276 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:43:35,276 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 9] total 18 [2022-01-18 15:43:35,276 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1471607684] [2022-01-18 15:43:35,276 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:43:35,277 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-18 15:43:35,277 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:43:35,277 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-18 15:43:35,277 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=267, Unknown=0, NotChecked=0, Total=342 [2022-01-18 15:43:35,277 INFO L87 Difference]: Start difference. First operand 1262 states and 5306 transitions. Second operand has 19 states, 19 states have (on average 3.0) internal successors, (57), 18 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 15:43:35,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:43:35,573 INFO L93 Difference]: Finished difference Result 1616 states and 6533 transitions. [2022-01-18 15:43:35,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-18 15:43:35,574 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.0) internal successors, (57), 18 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 29 [2022-01-18 15:43:35,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:43:35,578 INFO L225 Difference]: With dead ends: 1616 [2022-01-18 15:43:35,578 INFO L226 Difference]: Without dead ends: 1603 [2022-01-18 15:43:35,578 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 45 SyntacticMatches, 4 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=123, Invalid=383, Unknown=0, NotChecked=0, Total=506 [2022-01-18 15:43:35,579 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 194 mSDsluCounter, 456 mSDsCounter, 0 mSdLazyCounter, 656 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 194 SdHoareTripleChecker+Valid, 188 SdHoareTripleChecker+Invalid, 660 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 656 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:43:35,579 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [194 Valid, 188 Invalid, 660 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 656 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:43:35,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1603 states. [2022-01-18 15:43:35,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1603 to 1262. [2022-01-18 15:43:35,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1262 states, 1261 states have (on average 4.205392545598731) internal successors, (5303), 1261 states have internal predecessors, (5303), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:43:35,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1262 states to 1262 states and 5303 transitions. [2022-01-18 15:43:35,601 INFO L78 Accepts]: Start accepts. Automaton has 1262 states and 5303 transitions. Word has length 29 [2022-01-18 15:43:35,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:43:35,602 INFO L470 AbstractCegarLoop]: Abstraction has 1262 states and 5303 transitions. [2022-01-18 15:43:35,602 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.0) internal successors, (57), 18 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 15:43:35,602 INFO L276 IsEmpty]: Start isEmpty. Operand 1262 states and 5303 transitions. [2022-01-18 15:43:35,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-01-18 15:43:35,604 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:43:35,604 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:43:35,625 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-01-18 15:43:35,819 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,SelfDestructingSolverStorable17 [2022-01-18 15:43:35,819 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-01-18 15:43:35,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:43:35,820 INFO L85 PathProgramCache]: Analyzing trace with hash 1486336511, now seen corresponding path program 13 times [2022-01-18 15:43:35,820 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:43:35,820 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [539197232] [2022-01-18 15:43:35,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:43:35,820 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:43:35,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:43:35,927 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:43:35,927 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:43:35,927 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [539197232] [2022-01-18 15:43:35,927 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [539197232] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:43:35,927 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [911932288] [2022-01-18 15:43:35,927 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 15:43:35,927 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:43:35,927 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:43:35,928 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:43:35,929 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-01-18 15:43:35,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:43:35,958 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2022-01-18 15:43:35,959 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:43:36,095 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-01-18 15:43:36,205 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:43:36,206 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:43:36,335 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:43:36,335 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 22 [2022-01-18 15:43:36,348 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:43:36,349 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 7 [2022-01-18 15:43:36,391 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:43:36,391 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [911932288] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:43:36,391 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:43:36,391 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 20 [2022-01-18 15:43:36,391 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [455426473] [2022-01-18 15:43:36,391 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:43:36,392 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 15:43:36,392 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:43:36,392 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 15:43:36,392 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=347, Unknown=0, NotChecked=0, Total=420 [2022-01-18 15:43:36,392 INFO L87 Difference]: Start difference. First operand 1262 states and 5303 transitions. Second operand has 21 states, 21 states have (on average 3.619047619047619) internal successors, (76), 20 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:43:37,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:43:37,230 INFO L93 Difference]: Finished difference Result 2003 states and 7967 transitions. [2022-01-18 15:43:37,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-01-18 15:43:37,230 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.619047619047619) internal successors, (76), 20 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-01-18 15:43:37,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:43:37,234 INFO L225 Difference]: With dead ends: 2003 [2022-01-18 15:43:37,235 INFO L226 Difference]: Without dead ends: 1957 [2022-01-18 15:43:37,235 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 44 SyntacticMatches, 3 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 344 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=257, Invalid=1149, Unknown=0, NotChecked=0, Total=1406 [2022-01-18 15:43:37,235 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 412 mSDsluCounter, 1078 mSDsCounter, 0 mSdLazyCounter, 1417 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 412 SdHoareTripleChecker+Valid, 420 SdHoareTripleChecker+Invalid, 1458 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 1417 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 15:43:37,235 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [412 Valid, 420 Invalid, 1458 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 1417 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-18 15:43:37,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1957 states. [2022-01-18 15:43:37,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1957 to 1229. [2022-01-18 15:43:37,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1229 states, 1228 states have (on average 4.19299674267101) internal successors, (5149), 1228 states have internal predecessors, (5149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:43:37,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1229 states to 1229 states and 5149 transitions. [2022-01-18 15:43:37,258 INFO L78 Accepts]: Start accepts. Automaton has 1229 states and 5149 transitions. Word has length 29 [2022-01-18 15:43:37,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:43:37,259 INFO L470 AbstractCegarLoop]: Abstraction has 1229 states and 5149 transitions. [2022-01-18 15:43:37,259 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.619047619047619) internal successors, (76), 20 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:43:37,259 INFO L276 IsEmpty]: Start isEmpty. Operand 1229 states and 5149 transitions. [2022-01-18 15:43:37,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-01-18 15:43:37,261 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:43:37,261 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:43:37,278 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 15:43:37,462 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:43:37,463 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-01-18 15:43:37,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:43:37,463 INFO L85 PathProgramCache]: Analyzing trace with hash 1601658297, now seen corresponding path program 14 times [2022-01-18 15:43:37,463 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:43:37,463 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1021043888] [2022-01-18 15:43:37,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:43:37,463 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:43:37,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:43:37,570 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:43:37,571 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:43:37,571 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1021043888] [2022-01-18 15:43:37,571 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1021043888] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:43:37,571 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1310417917] [2022-01-18 15:43:37,571 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 15:43:37,571 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:43:37,571 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:43:37,572 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:43:37,572 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-01-18 15:43:37,602 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:43:37,602 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:43:37,602 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2022-01-18 15:43:37,603 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:43:37,745 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:43:37,745 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2022-01-18 15:43:37,954 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:43:37,954 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:43:38,120 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:43:38,120 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1310417917] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:43:38,120 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:43:38,120 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 20 [2022-01-18 15:43:38,120 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1502190786] [2022-01-18 15:43:38,120 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:43:38,120 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 15:43:38,120 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:43:38,121 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 15:43:38,121 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=364, Unknown=0, NotChecked=0, Total=420 [2022-01-18 15:43:38,121 INFO L87 Difference]: Start difference. First operand 1229 states and 5149 transitions. Second operand has 21 states, 21 states have (on average 2.857142857142857) internal successors, (60), 20 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:43:38,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:43:38,618 INFO L93 Difference]: Finished difference Result 1449 states and 5983 transitions. [2022-01-18 15:43:38,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-18 15:43:38,618 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.857142857142857) internal successors, (60), 20 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 29 [2022-01-18 15:43:38,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:43:38,621 INFO L225 Difference]: With dead ends: 1449 [2022-01-18 15:43:38,621 INFO L226 Difference]: Without dead ends: 1430 [2022-01-18 15:43:38,621 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 44 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=102, Invalid=600, Unknown=0, NotChecked=0, Total=702 [2022-01-18 15:43:38,622 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 130 mSDsluCounter, 777 mSDsCounter, 0 mSdLazyCounter, 1080 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 130 SdHoareTripleChecker+Valid, 301 SdHoareTripleChecker+Invalid, 1083 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 1080 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 15:43:38,622 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [130 Valid, 301 Invalid, 1083 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 1080 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-18 15:43:38,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1430 states. [2022-01-18 15:43:38,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1430 to 1214. [2022-01-18 15:43:38,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1214 states, 1213 states have (on average 4.196207749381698) internal successors, (5090), 1213 states have internal predecessors, (5090), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:43:38,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1214 states to 1214 states and 5090 transitions. [2022-01-18 15:43:38,642 INFO L78 Accepts]: Start accepts. Automaton has 1214 states and 5090 transitions. Word has length 29 [2022-01-18 15:43:38,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:43:38,642 INFO L470 AbstractCegarLoop]: Abstraction has 1214 states and 5090 transitions. [2022-01-18 15:43:38,642 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.857142857142857) internal successors, (60), 20 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:43:38,642 INFO L276 IsEmpty]: Start isEmpty. Operand 1214 states and 5090 transitions. [2022-01-18 15:43:38,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-01-18 15:43:38,644 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:43:38,645 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:43:38,660 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-01-18 15:43:38,847 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:43:38,847 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-01-18 15:43:38,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:43:38,848 INFO L85 PathProgramCache]: Analyzing trace with hash -801130063, now seen corresponding path program 1 times [2022-01-18 15:43:38,848 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:43:38,848 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2136595998] [2022-01-18 15:43:38,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:43:38,848 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:43:38,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:43:38,965 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:43:38,965 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:43:38,965 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2136595998] [2022-01-18 15:43:38,965 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2136595998] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:43:38,965 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1087794115] [2022-01-18 15:43:38,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:43:38,965 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:43:38,965 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:43:38,966 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:43:38,967 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-01-18 15:43:38,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:43:38,996 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2022-01-18 15:43:38,997 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:43:39,109 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-01-18 15:43:39,226 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:43:39,227 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:43:39,343 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:43:39,343 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 22 [2022-01-18 15:43:39,352 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:43:39,352 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 7 [2022-01-18 15:43:39,397 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:43:39,397 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1087794115] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:43:39,397 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:43:39,397 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 20 [2022-01-18 15:43:39,397 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [198777288] [2022-01-18 15:43:39,397 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:43:39,397 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 15:43:39,397 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:43:39,398 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 15:43:39,398 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=347, Unknown=0, NotChecked=0, Total=420 [2022-01-18 15:43:39,398 INFO L87 Difference]: Start difference. First operand 1214 states and 5090 transitions. Second operand has 21 states, 21 states have (on average 3.7142857142857144) internal successors, (78), 20 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:43:40,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:43:40,295 INFO L93 Difference]: Finished difference Result 2164 states and 8762 transitions. [2022-01-18 15:43:40,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-01-18 15:43:40,295 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.7142857142857144) internal successors, (78), 20 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-01-18 15:43:40,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:43:40,300 INFO L225 Difference]: With dead ends: 2164 [2022-01-18 15:43:40,300 INFO L226 Difference]: Without dead ends: 2126 [2022-01-18 15:43:40,301 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 44 SyntacticMatches, 3 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 355 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=258, Invalid=1148, Unknown=0, NotChecked=0, Total=1406 [2022-01-18 15:43:40,301 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 437 mSDsluCounter, 1119 mSDsCounter, 0 mSdLazyCounter, 1453 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 437 SdHoareTripleChecker+Valid, 425 SdHoareTripleChecker+Invalid, 1499 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 1453 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 15:43:40,301 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [437 Valid, 425 Invalid, 1499 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 1453 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-18 15:43:40,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2126 states. [2022-01-18 15:43:40,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2126 to 1426. [2022-01-18 15:43:40,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1426 states, 1425 states have (on average 4.269473684210526) internal successors, (6084), 1425 states have internal predecessors, (6084), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:43:40,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1426 states to 1426 states and 6084 transitions. [2022-01-18 15:43:40,328 INFO L78 Accepts]: Start accepts. Automaton has 1426 states and 6084 transitions. Word has length 29 [2022-01-18 15:43:40,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:43:40,328 INFO L470 AbstractCegarLoop]: Abstraction has 1426 states and 6084 transitions. [2022-01-18 15:43:40,328 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.7142857142857144) internal successors, (78), 20 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:43:40,328 INFO L276 IsEmpty]: Start isEmpty. Operand 1426 states and 6084 transitions. [2022-01-18 15:43:40,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-01-18 15:43:40,330 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:43:40,331 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:43:40,346 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-01-18 15:43:40,532 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:43:40,532 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-01-18 15:43:40,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:43:40,533 INFO L85 PathProgramCache]: Analyzing trace with hash 621224763, now seen corresponding path program 2 times [2022-01-18 15:43:40,533 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:43:40,533 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [88849730] [2022-01-18 15:43:40,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:43:40,533 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:43:40,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:43:40,640 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:43:40,640 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:43:40,640 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [88849730] [2022-01-18 15:43:40,641 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [88849730] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:43:40,641 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1958720155] [2022-01-18 15:43:40,641 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 15:43:40,641 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:43:40,641 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:43:40,642 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:43:40,642 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-01-18 15:43:40,672 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:43:40,673 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:43:40,673 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2022-01-18 15:43:40,674 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:43:40,777 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:43:40,777 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2022-01-18 15:43:40,988 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:43:40,988 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:43:41,128 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:43:41,129 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1958720155] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:43:41,129 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:43:41,129 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 9] total 19 [2022-01-18 15:43:41,129 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [593285351] [2022-01-18 15:43:41,129 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:43:41,129 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 15:43:41,129 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:43:41,129 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 15:43:41,130 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380 [2022-01-18 15:43:41,130 INFO L87 Difference]: Start difference. First operand 1426 states and 6084 transitions. Second operand has 20 states, 20 states have (on average 2.85) 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 15:43:41,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:43:41,748 INFO L93 Difference]: Finished difference Result 1744 states and 7265 transitions. [2022-01-18 15:43:41,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-01-18 15:43:41,748 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.85) 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 29 [2022-01-18 15:43:41,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:43:41,752 INFO L225 Difference]: With dead ends: 1744 [2022-01-18 15:43:41,752 INFO L226 Difference]: Without dead ends: 1731 [2022-01-18 15:43:41,752 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 45 SyntacticMatches, 3 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 175 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=159, Invalid=597, Unknown=0, NotChecked=0, Total=756 [2022-01-18 15:43:41,752 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 174 mSDsluCounter, 986 mSDsCounter, 0 mSdLazyCounter, 1322 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 174 SdHoareTripleChecker+Valid, 376 SdHoareTripleChecker+Invalid, 1329 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 1322 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 15:43:41,753 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [174 Valid, 376 Invalid, 1329 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 1322 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-18 15:43:41,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1731 states. [2022-01-18 15:43:41,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1731 to 1426. [2022-01-18 15:43:41,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1426 states, 1425 states have (on average 4.267368421052631) internal successors, (6081), 1425 states have internal predecessors, (6081), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:43:41,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1426 states to 1426 states and 6081 transitions. [2022-01-18 15:43:41,799 INFO L78 Accepts]: Start accepts. Automaton has 1426 states and 6081 transitions. Word has length 29 [2022-01-18 15:43:41,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:43:41,799 INFO L470 AbstractCegarLoop]: Abstraction has 1426 states and 6081 transitions. [2022-01-18 15:43:41,799 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.85) 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 15:43:41,799 INFO L276 IsEmpty]: Start isEmpty. Operand 1426 states and 6081 transitions. [2022-01-18 15:43:41,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-01-18 15:43:41,810 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:43:41,810 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:43:41,841 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 15:43:42,023 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:43:42,023 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-01-18 15:43:42,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:43:42,024 INFO L85 PathProgramCache]: Analyzing trace with hash 176122743, now seen corresponding path program 3 times [2022-01-18 15:43:42,024 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:43:42,024 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [524167133] [2022-01-18 15:43:42,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:43:42,024 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:43:42,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:43:42,123 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:43:42,123 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:43:42,123 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [524167133] [2022-01-18 15:43:42,123 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [524167133] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:43:42,123 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1230364877] [2022-01-18 15:43:42,123 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 15:43:42,123 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:43:42,124 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:43:42,124 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:43:42,125 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-01-18 15:43:42,157 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 15:43:42,158 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:43:42,158 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 23 conjunts are in the unsatisfiable core [2022-01-18 15:43:42,159 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:43:42,255 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:43:42,255 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2022-01-18 15:43:42,429 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:43:42,430 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:43:42,573 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:43:42,573 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1230364877] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:43:42,573 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:43:42,573 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 18 [2022-01-18 15:43:42,573 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1069143144] [2022-01-18 15:43:42,573 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:43:42,573 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-18 15:43:42,573 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:43:42,574 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-18 15:43:42,574 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=274, Unknown=0, NotChecked=0, Total=342 [2022-01-18 15:43:42,574 INFO L87 Difference]: Start difference. First operand 1426 states and 6081 transitions. Second operand has 19 states, 19 states have (on average 2.8421052631578947) internal successors, (54), 18 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:43:42,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:43:42,975 INFO L93 Difference]: Finished difference Result 1768 states and 7335 transitions. [2022-01-18 15:43:42,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-18 15:43:42,975 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.8421052631578947) internal successors, (54), 18 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-01-18 15:43:42,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:43:42,979 INFO L225 Difference]: With dead ends: 1768 [2022-01-18 15:43:42,979 INFO L226 Difference]: Without dead ends: 1740 [2022-01-18 15:43:42,979 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 45 SyntacticMatches, 4 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 164 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=138, Invalid=462, Unknown=0, NotChecked=0, Total=600 [2022-01-18 15:43:42,982 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 188 mSDsluCounter, 614 mSDsCounter, 0 mSdLazyCounter, 885 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 188 SdHoareTripleChecker+Valid, 240 SdHoareTripleChecker+Invalid, 891 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 885 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 15:43:42,982 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [188 Valid, 240 Invalid, 891 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 885 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 15:43:42,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1740 states. [2022-01-18 15:43:43,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1740 to 1383. [2022-01-18 15:43:43,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1383 states, 1382 states have (on average 4.2691751085383505) internal successors, (5900), 1382 states have internal predecessors, (5900), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:43:43,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1383 states to 1383 states and 5900 transitions. [2022-01-18 15:43:43,006 INFO L78 Accepts]: Start accepts. Automaton has 1383 states and 5900 transitions. Word has length 29 [2022-01-18 15:43:43,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:43:43,006 INFO L470 AbstractCegarLoop]: Abstraction has 1383 states and 5900 transitions. [2022-01-18 15:43:43,009 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.8421052631578947) internal successors, (54), 18 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:43:43,009 INFO L276 IsEmpty]: Start isEmpty. Operand 1383 states and 5900 transitions. [2022-01-18 15:43:43,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-01-18 15:43:43,012 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:43:43,012 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:43:43,033 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-01-18 15:43:43,223 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:43:43,223 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-01-18 15:43:43,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:43:43,224 INFO L85 PathProgramCache]: Analyzing trace with hash 660102987, now seen corresponding path program 4 times [2022-01-18 15:43:43,224 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:43:43,224 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [817513689] [2022-01-18 15:43:43,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:43:43,224 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:43:43,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:43:43,327 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:43:43,327 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:43:43,328 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [817513689] [2022-01-18 15:43:43,328 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [817513689] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:43:43,328 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1410202582] [2022-01-18 15:43:43,328 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 15:43:43,328 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:43:43,328 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:43:43,329 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:43:43,330 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-01-18 15:43:43,359 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 15:43:43,359 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:43:43,359 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2022-01-18 15:43:43,360 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:43:43,495 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-01-18 15:43:43,630 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:43:43,630 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:43:43,757 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:43:43,757 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 22 [2022-01-18 15:43:43,767 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:43:43,768 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 7 [2022-01-18 15:43:43,816 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:43:43,816 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1410202582] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:43:43,816 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:43:43,816 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 21 [2022-01-18 15:43:43,816 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [309047958] [2022-01-18 15:43:43,816 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:43:43,816 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 15:43:43,816 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:43:43,817 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 15:43:43,817 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=401, Unknown=0, NotChecked=0, Total=462 [2022-01-18 15:43:43,817 INFO L87 Difference]: Start difference. First operand 1383 states and 5900 transitions. Second operand has 22 states, 22 states have (on average 3.4545454545454546) internal successors, (76), 21 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:43:44,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:43:44,836 INFO L93 Difference]: Finished difference Result 2052 states and 8368 transitions. [2022-01-18 15:43:44,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-01-18 15:43:44,837 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.4545454545454546) internal successors, (76), 21 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-01-18 15:43:44,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:43:44,841 INFO L225 Difference]: With dead ends: 2052 [2022-01-18 15:43:44,841 INFO L226 Difference]: Without dead ends: 2003 [2022-01-18 15:43:44,841 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 43 SyntacticMatches, 3 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 373 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=207, Invalid=1433, Unknown=0, NotChecked=0, Total=1640 [2022-01-18 15:43:44,842 INFO L933 BasicCegarLoop]: 46 mSDtfsCounter, 394 mSDsluCounter, 1231 mSDsCounter, 0 mSdLazyCounter, 1601 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 394 SdHoareTripleChecker+Valid, 495 SdHoareTripleChecker+Invalid, 1657 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 1601 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 15:43:44,842 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [394 Valid, 495 Invalid, 1657 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 1601 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-18 15:43:44,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2003 states. [2022-01-18 15:43:44,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2003 to 1377. [2022-01-18 15:43:44,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1377 states, 1376 states have (on average 4.2688953488372094) internal successors, (5874), 1376 states have internal predecessors, (5874), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:43:44,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1377 states to 1377 states and 5874 transitions. [2022-01-18 15:43:44,868 INFO L78 Accepts]: Start accepts. Automaton has 1377 states and 5874 transitions. Word has length 29 [2022-01-18 15:43:44,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:43:44,868 INFO L470 AbstractCegarLoop]: Abstraction has 1377 states and 5874 transitions. [2022-01-18 15:43:44,869 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 3.4545454545454546) internal successors, (76), 21 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:43:44,869 INFO L276 IsEmpty]: Start isEmpty. Operand 1377 states and 5874 transitions. [2022-01-18 15:43:44,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-01-18 15:43:44,871 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:43:44,871 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:43:44,889 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-01-18 15:43:45,086 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:43:45,086 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-01-18 15:43:45,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:43:45,087 INFO L85 PathProgramCache]: Analyzing trace with hash -703947667, now seen corresponding path program 5 times [2022-01-18 15:43:45,087 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:43:45,087 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [265623914] [2022-01-18 15:43:45,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:43:45,087 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:43:45,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:43:45,185 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:43:45,185 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:43:45,185 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [265623914] [2022-01-18 15:43:45,185 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [265623914] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:43:45,185 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1913600054] [2022-01-18 15:43:45,185 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 15:43:45,185 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:43:45,185 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:43:45,186 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:43:45,187 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-01-18 15:43:45,223 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 15:43:45,224 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:43:45,224 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 31 conjunts are in the unsatisfiable core [2022-01-18 15:43:45,225 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:43:45,337 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 7 [2022-01-18 15:43:45,492 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:43:45,492 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:43:45,603 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:43:45,603 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 22 [2022-01-18 15:43:45,613 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:43:45,613 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 7 [2022-01-18 15:43:45,671 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:43:45,671 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1913600054] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:43:45,671 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:43:45,671 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 8] total 21 [2022-01-18 15:43:45,671 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [926145678] [2022-01-18 15:43:45,671 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:43:45,671 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 15:43:45,671 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:43:45,672 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 15:43:45,672 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=386, Unknown=0, NotChecked=0, Total=462 [2022-01-18 15:43:45,672 INFO L87 Difference]: Start difference. First operand 1377 states and 5874 transitions. Second operand has 22 states, 22 states have (on average 3.5454545454545454) internal successors, (78), 21 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:43:46,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:43:46,731 INFO L93 Difference]: Finished difference Result 2556 states and 10250 transitions. [2022-01-18 15:43:46,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-01-18 15:43:46,731 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.5454545454545454) internal successors, (78), 21 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-01-18 15:43:46,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:43:46,737 INFO L225 Difference]: With dead ends: 2556 [2022-01-18 15:43:46,737 INFO L226 Difference]: Without dead ends: 2518 [2022-01-18 15:43:46,738 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 43 SyntacticMatches, 3 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 461 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=288, Invalid=1434, Unknown=0, NotChecked=0, Total=1722 [2022-01-18 15:43:46,738 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 538 mSDsluCounter, 1317 mSDsCounter, 0 mSdLazyCounter, 1701 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 538 SdHoareTripleChecker+Valid, 503 SdHoareTripleChecker+Invalid, 1775 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 1701 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 15:43:46,738 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [538 Valid, 503 Invalid, 1775 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 1701 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-18 15:43:46,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2518 states. [2022-01-18 15:43:46,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2518 to 1503. [2022-01-18 15:43:46,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1503 states, 1502 states have (on average 4.2982689747004) internal successors, (6456), 1502 states have internal predecessors, (6456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:43:46,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1503 states to 1503 states and 6456 transitions. [2022-01-18 15:43:46,766 INFO L78 Accepts]: Start accepts. Automaton has 1503 states and 6456 transitions. Word has length 29 [2022-01-18 15:43:46,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:43:46,767 INFO L470 AbstractCegarLoop]: Abstraction has 1503 states and 6456 transitions. [2022-01-18 15:43:46,767 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 3.5454545454545454) internal successors, (78), 21 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:43:46,767 INFO L276 IsEmpty]: Start isEmpty. Operand 1503 states and 6456 transitions. [2022-01-18 15:43:46,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-01-18 15:43:46,770 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:43:46,770 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:43:46,786 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-01-18 15:43:46,985 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,SelfDestructingSolverStorable24 [2022-01-18 15:43:46,985 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-01-18 15:43:46,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:43:46,986 INFO L85 PathProgramCache]: Analyzing trace with hash 718407159, now seen corresponding path program 6 times [2022-01-18 15:43:46,986 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:43:46,986 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [108625835] [2022-01-18 15:43:46,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:43:46,986 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:43:46,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:43:47,081 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:43:47,081 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:43:47,081 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [108625835] [2022-01-18 15:43:47,081 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [108625835] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:43:47,081 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [453905968] [2022-01-18 15:43:47,081 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 15:43:47,081 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:43:47,082 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:43:47,082 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:43:47,083 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-01-18 15:43:47,113 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 15:43:47,113 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:43:47,114 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 23 conjunts are in the unsatisfiable core [2022-01-18 15:43:47,114 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:43:47,210 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:43:47,211 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2022-01-18 15:43:47,351 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:43:47,352 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:43:47,502 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:43:47,502 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [453905968] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:43:47,502 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:43:47,502 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 9] total 18 [2022-01-18 15:43:47,502 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [642851982] [2022-01-18 15:43:47,502 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:43:47,503 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-18 15:43:47,503 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:43:47,503 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-18 15:43:47,504 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=267, Unknown=0, NotChecked=0, Total=342 [2022-01-18 15:43:47,504 INFO L87 Difference]: Start difference. First operand 1503 states and 6456 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 15:43:47,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:43:47,880 INFO L93 Difference]: Finished difference Result 1897 states and 7821 transitions. [2022-01-18 15:43:47,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-18 15:43:47,880 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 29 [2022-01-18 15:43:47,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:43:47,886 INFO L225 Difference]: With dead ends: 1897 [2022-01-18 15:43:47,886 INFO L226 Difference]: Without dead ends: 1884 [2022-01-18 15:43:47,887 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 45 SyntacticMatches, 4 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=123, Invalid=383, Unknown=0, NotChecked=0, Total=506 [2022-01-18 15:43:47,887 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 128 mSDsluCounter, 724 mSDsCounter, 0 mSdLazyCounter, 1005 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 128 SdHoareTripleChecker+Valid, 285 SdHoareTripleChecker+Invalid, 1008 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 1005 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 15:43:47,888 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [128 Valid, 285 Invalid, 1008 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 1005 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 15:43:47,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1884 states. [2022-01-18 15:43:47,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1884 to 1503. [2022-01-18 15:43:47,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1503 states, 1502 states have (on average 4.296271637816245) internal successors, (6453), 1502 states have internal predecessors, (6453), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:43:47,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1503 states to 1503 states and 6453 transitions. [2022-01-18 15:43:47,912 INFO L78 Accepts]: Start accepts. Automaton has 1503 states and 6453 transitions. Word has length 29 [2022-01-18 15:43:47,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:43:47,912 INFO L470 AbstractCegarLoop]: Abstraction has 1503 states and 6453 transitions. [2022-01-18 15:43:47,912 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 15:43:47,912 INFO L276 IsEmpty]: Start isEmpty. Operand 1503 states and 6453 transitions. [2022-01-18 15:43:47,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-01-18 15:43:47,915 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:43:47,915 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:43:47,930 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-01-18 15:43:48,117 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,SelfDestructingSolverStorable25 [2022-01-18 15:43:48,117 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-01-18 15:43:48,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:43:48,118 INFO L85 PathProgramCache]: Analyzing trace with hash 273305139, now seen corresponding path program 7 times [2022-01-18 15:43:48,118 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:43:48,118 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1414599556] [2022-01-18 15:43:48,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:43:48,118 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:43:48,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:43:48,247 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:43:48,247 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:43:48,247 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1414599556] [2022-01-18 15:43:48,247 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1414599556] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:43:48,247 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [452646563] [2022-01-18 15:43:48,247 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 15:43:48,248 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:43:48,248 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:43:48,248 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:43:48,249 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-01-18 15:43:48,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:43:48,280 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2022-01-18 15:43:48,281 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:43:48,417 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-01-18 15:43:48,544 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:43:48,544 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:43:48,652 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:43:48,652 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 22 [2022-01-18 15:43:48,661 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:43:48,661 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 7 [2022-01-18 15:43:48,706 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:43:48,706 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [452646563] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:43:48,706 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:43:48,706 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 20 [2022-01-18 15:43:48,706 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1631170052] [2022-01-18 15:43:48,706 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:43:48,706 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 15:43:48,706 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:43:48,707 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 15:43:48,707 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=347, Unknown=0, NotChecked=0, Total=420 [2022-01-18 15:43:48,707 INFO L87 Difference]: Start difference. First operand 1503 states and 6453 transitions. Second operand has 21 states, 21 states have (on average 3.619047619047619) internal successors, (76), 20 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:43:49,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:43:49,578 INFO L93 Difference]: Finished difference Result 2408 states and 9776 transitions. [2022-01-18 15:43:49,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-01-18 15:43:49,579 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.619047619047619) internal successors, (76), 20 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-01-18 15:43:49,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:43:49,584 INFO L225 Difference]: With dead ends: 2408 [2022-01-18 15:43:49,584 INFO L226 Difference]: Without dead ends: 2362 [2022-01-18 15:43:49,584 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 44 SyntacticMatches, 3 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 346 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=257, Invalid=1149, Unknown=0, NotChecked=0, Total=1406 [2022-01-18 15:43:49,584 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 475 mSDsluCounter, 1127 mSDsCounter, 0 mSdLazyCounter, 1467 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 475 SdHoareTripleChecker+Valid, 442 SdHoareTripleChecker+Invalid, 1525 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 1467 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 15:43:49,585 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [475 Valid, 442 Invalid, 1525 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 1467 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-18 15:43:49,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2362 states. [2022-01-18 15:43:49,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2362 to 1463. [2022-01-18 15:43:49,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1463 states, 1462 states have (on average 4.292065663474692) internal successors, (6275), 1462 states have internal predecessors, (6275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:43:49,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1463 states to 1463 states and 6275 transitions. [2022-01-18 15:43:49,609 INFO L78 Accepts]: Start accepts. Automaton has 1463 states and 6275 transitions. Word has length 29 [2022-01-18 15:43:49,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:43:49,609 INFO L470 AbstractCegarLoop]: Abstraction has 1463 states and 6275 transitions. [2022-01-18 15:43:49,609 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.619047619047619) internal successors, (76), 20 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:43:49,609 INFO L276 IsEmpty]: Start isEmpty. Operand 1463 states and 6275 transitions. [2022-01-18 15:43:49,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-01-18 15:43:49,612 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:43:49,612 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:43:49,627 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2022-01-18 15:43:49,824 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-01-18 15:43:49,824 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-01-18 15:43:49,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:43:49,824 INFO L85 PathProgramCache]: Analyzing trace with hash 1839456173, now seen corresponding path program 8 times [2022-01-18 15:43:49,824 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:43:49,824 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [867742366] [2022-01-18 15:43:49,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:43:49,824 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:43:49,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:43:49,928 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:43:49,929 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:43:49,929 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [867742366] [2022-01-18 15:43:49,929 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [867742366] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:43:49,929 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [769978913] [2022-01-18 15:43:49,929 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 15:43:49,929 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:43:49,929 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:43:49,930 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:43:49,930 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-01-18 15:43:49,959 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:43:49,959 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:43:49,960 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2022-01-18 15:43:49,960 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:43:50,093 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:43:50,094 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2022-01-18 15:43:50,344 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:43:50,344 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:43:50,500 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:43:50,500 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [769978913] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:43:50,500 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:43:50,501 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 20 [2022-01-18 15:43:50,501 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [539512590] [2022-01-18 15:43:50,501 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:43:50,501 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 15:43:50,501 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:43:50,501 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 15:43:50,501 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=364, Unknown=0, NotChecked=0, Total=420 [2022-01-18 15:43:50,501 INFO L87 Difference]: Start difference. First operand 1463 states and 6275 transitions. Second operand has 21 states, 21 states have (on average 2.761904761904762) internal successors, (58), 20 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 15:43:51,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:43:51,071 INFO L93 Difference]: Finished difference Result 1689 states and 7120 transitions. [2022-01-18 15:43:51,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-18 15:43:51,071 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.761904761904762) internal successors, (58), 20 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 29 [2022-01-18 15:43:51,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:43:51,075 INFO L225 Difference]: With dead ends: 1689 [2022-01-18 15:43:51,075 INFO L226 Difference]: Without dead ends: 1670 [2022-01-18 15:43:51,075 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 44 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=102, Invalid=600, Unknown=0, NotChecked=0, Total=702 [2022-01-18 15:43:51,076 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 103 mSDsluCounter, 969 mSDsCounter, 0 mSdLazyCounter, 1333 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 387 SdHoareTripleChecker+Invalid, 1336 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 1333 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 15:43:51,076 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [103 Valid, 387 Invalid, 1336 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 1333 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-18 15:43:51,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1670 states. [2022-01-18 15:43:51,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1670 to 1472. [2022-01-18 15:43:51,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1472 states, 1471 states have (on average 4.282121006118287) internal successors, (6299), 1471 states have internal predecessors, (6299), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:43:51,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1472 states to 1472 states and 6299 transitions. [2022-01-18 15:43:51,098 INFO L78 Accepts]: Start accepts. Automaton has 1472 states and 6299 transitions. Word has length 29 [2022-01-18 15:43:51,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:43:51,098 INFO L470 AbstractCegarLoop]: Abstraction has 1472 states and 6299 transitions. [2022-01-18 15:43:51,098 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.761904761904762) internal successors, (58), 20 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 15:43:51,098 INFO L276 IsEmpty]: Start isEmpty. Operand 1472 states and 6299 transitions. [2022-01-18 15:43:51,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-01-18 15:43:51,101 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:43:51,101 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:43:51,116 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2022-01-18 15:43:51,301 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:43:51,301 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-01-18 15:43:51,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:43:51,301 INFO L85 PathProgramCache]: Analyzing trace with hash -329809185, now seen corresponding path program 9 times [2022-01-18 15:43:51,302 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:43:51,302 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2034190451] [2022-01-18 15:43:51,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:43:51,302 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:43:51,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:43:51,394 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:43:51,394 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:43:51,394 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2034190451] [2022-01-18 15:43:51,394 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2034190451] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:43:51,394 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [400452663] [2022-01-18 15:43:51,394 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 15:43:51,394 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:43:51,394 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:43:51,395 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:43:51,395 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-01-18 15:43:51,425 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 15:43:51,425 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:43:51,425 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 23 conjunts are in the unsatisfiable core [2022-01-18 15:43:51,426 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:43:51,506 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:43:51,506 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-18 15:43:51,626 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:43:51,626 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:43:51,772 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:43:51,772 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [400452663] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:43:51,772 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:43:51,773 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 17 [2022-01-18 15:43:51,773 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [862785025] [2022-01-18 15:43:51,773 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:43:51,773 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-18 15:43:51,773 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:43:51,774 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-18 15:43:51,774 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=249, Unknown=0, NotChecked=0, Total=306 [2022-01-18 15:43:51,774 INFO L87 Difference]: Start difference. First operand 1472 states and 6299 transitions. Second operand has 18 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 17 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 15:43:52,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:43:52,225 INFO L93 Difference]: Finished difference Result 2079 states and 8528 transitions. [2022-01-18 15:43:52,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-18 15:43:52,225 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 17 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 29 [2022-01-18 15:43:52,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:43:52,230 INFO L225 Difference]: With dead ends: 2079 [2022-01-18 15:43:52,230 INFO L226 Difference]: Without dead ends: 2060 [2022-01-18 15:43:52,230 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 46 SyntacticMatches, 4 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=115, Invalid=437, Unknown=0, NotChecked=0, Total=552 [2022-01-18 15:43:52,230 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 254 mSDsluCounter, 682 mSDsCounter, 0 mSdLazyCounter, 979 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 254 SdHoareTripleChecker+Valid, 268 SdHoareTripleChecker+Invalid, 985 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 979 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 15:43:52,231 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [254 Valid, 268 Invalid, 985 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 979 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 15:43:52,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2060 states. [2022-01-18 15:43:52,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2060 to 1500. [2022-01-18 15:43:52,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1500 states, 1499 states have (on average 4.280186791194129) internal successors, (6416), 1499 states have internal predecessors, (6416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:43:52,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1500 states to 1500 states and 6416 transitions. [2022-01-18 15:43:52,255 INFO L78 Accepts]: Start accepts. Automaton has 1500 states and 6416 transitions. Word has length 29 [2022-01-18 15:43:52,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:43:52,255 INFO L470 AbstractCegarLoop]: Abstraction has 1500 states and 6416 transitions. [2022-01-18 15:43:52,255 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 17 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 15:43:52,255 INFO L276 IsEmpty]: Start isEmpty. Operand 1500 states and 6416 transitions. [2022-01-18 15:43:52,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-01-18 15:43:52,257 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:43:52,257 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:43:52,273 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2022-01-18 15:43:52,458 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,SelfDestructingSolverStorable28 [2022-01-18 15:43:52,458 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-01-18 15:43:52,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:43:52,458 INFO L85 PathProgramCache]: Analyzing trace with hash 1092545641, now seen corresponding path program 10 times [2022-01-18 15:43:52,458 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:43:52,458 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [430815985] [2022-01-18 15:43:52,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:43:52,459 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:43:52,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:43:52,574 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 15:43:52,574 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:43:52,574 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [430815985] [2022-01-18 15:43:52,574 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [430815985] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:43:52,574 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [830108087] [2022-01-18 15:43:52,574 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 15:43:52,574 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:43:52,574 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:43:52,575 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:43:52,576 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-01-18 15:43:52,605 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 15:43:52,605 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:43:52,606 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2022-01-18 15:43:52,607 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:43:52,775 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2022-01-18 15:43:52,899 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:43:52,899 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:43:53,005 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:43:53,006 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 22 [2022-01-18 15:43:53,017 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:43:53,017 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 7 [2022-01-18 15:43:53,060 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:43:53,060 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [830108087] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:43:53,060 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:43:53,060 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 19 [2022-01-18 15:43:53,060 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2114003395] [2022-01-18 15:43:53,060 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:43:53,061 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 15:43:53,061 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:43:53,061 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 15:43:53,061 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=317, Unknown=0, NotChecked=0, Total=380 [2022-01-18 15:43:53,061 INFO L87 Difference]: Start difference. First operand 1500 states and 6416 transitions. Second operand has 20 states, 20 states have (on average 3.7) internal successors, (74), 19 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:43:53,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:43:53,788 INFO L93 Difference]: Finished difference Result 2826 states and 11385 transitions. [2022-01-18 15:43:53,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-01-18 15:43:53,788 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.7) internal successors, (74), 19 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-01-18 15:43:53,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:43:53,794 INFO L225 Difference]: With dead ends: 2826 [2022-01-18 15:43:53,794 INFO L226 Difference]: Without dead ends: 2798 [2022-01-18 15:43:53,794 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 45 SyntacticMatches, 3 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 237 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=176, Invalid=880, Unknown=0, NotChecked=0, Total=1056 [2022-01-18 15:43:53,795 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 511 mSDsluCounter, 990 mSDsCounter, 0 mSdLazyCounter, 1310 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 511 SdHoareTripleChecker+Valid, 403 SdHoareTripleChecker+Invalid, 1364 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 1310 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 15:43:53,795 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [511 Valid, 403 Invalid, 1364 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 1310 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-18 15:43:53,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2798 states. [2022-01-18 15:43:53,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2798 to 1634. [2022-01-18 15:43:53,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1634 states, 1633 states have (on average 4.315370483772198) internal successors, (7047), 1633 states have internal predecessors, (7047), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:43:53,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1634 states to 1634 states and 7047 transitions. [2022-01-18 15:43:53,826 INFO L78 Accepts]: Start accepts. Automaton has 1634 states and 7047 transitions. Word has length 29 [2022-01-18 15:43:53,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:43:53,826 INFO L470 AbstractCegarLoop]: Abstraction has 1634 states and 7047 transitions. [2022-01-18 15:43:53,826 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.7) internal successors, (74), 19 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:43:53,826 INFO L276 IsEmpty]: Start isEmpty. Operand 1634 states and 7047 transitions. [2022-01-18 15:43:53,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-01-18 15:43:53,829 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:43:53,829 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:43:53,845 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2022-01-18 15:43:54,030 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:43:54,030 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-01-18 15:43:54,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:43:54,030 INFO L85 PathProgramCache]: Analyzing trace with hash 1493419173, now seen corresponding path program 11 times [2022-01-18 15:43:54,030 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:43:54,030 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [407302292] [2022-01-18 15:43:54,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:43:54,030 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:43:54,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:43:54,114 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:43:54,114 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:43:54,114 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [407302292] [2022-01-18 15:43:54,114 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [407302292] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:43:54,114 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1226154659] [2022-01-18 15:43:54,114 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 15:43:54,114 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:43:54,114 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:43:54,116 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:43:54,117 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-01-18 15:43:54,146 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 15:43:54,146 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:43:54,147 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2022-01-18 15:43:54,148 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:43:54,318 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2022-01-18 15:43:54,426 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:43:54,427 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:43:54,559 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:43:54,560 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 22 [2022-01-18 15:43:54,569 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:43:54,570 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 7 [2022-01-18 15:43:54,612 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:43:54,612 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1226154659] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:43:54,612 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:43:54,612 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 19 [2022-01-18 15:43:54,613 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1024045622] [2022-01-18 15:43:54,613 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:43:54,613 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 15:43:54,613 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:43:54,613 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 15:43:54,613 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=317, Unknown=0, NotChecked=0, Total=380 [2022-01-18 15:43:54,613 INFO L87 Difference]: Start difference. First operand 1634 states and 7047 transitions. Second operand has 20 states, 20 states have (on average 3.65) internal successors, (73), 19 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:43:55,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:43:55,449 INFO L93 Difference]: Finished difference Result 2812 states and 11355 transitions. [2022-01-18 15:43:55,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-01-18 15:43:55,449 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.65) internal successors, (73), 19 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-01-18 15:43:55,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:43:55,455 INFO L225 Difference]: With dead ends: 2812 [2022-01-18 15:43:55,455 INFO L226 Difference]: Without dead ends: 2767 [2022-01-18 15:43:55,455 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 45 SyntacticMatches, 3 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 245 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=172, Invalid=884, Unknown=0, NotChecked=0, Total=1056 [2022-01-18 15:43:55,456 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 344 mSDsluCounter, 1384 mSDsCounter, 0 mSdLazyCounter, 1765 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 344 SdHoareTripleChecker+Valid, 562 SdHoareTripleChecker+Invalid, 1792 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 1765 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 15:43:55,456 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [344 Valid, 562 Invalid, 1792 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 1765 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-18 15:43:55,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2767 states. [2022-01-18 15:43:55,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2767 to 1629. [2022-01-18 15:43:55,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1629 states, 1628 states have (on average 4.327395577395578) internal successors, (7045), 1628 states have internal predecessors, (7045), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:43:55,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1629 states to 1629 states and 7045 transitions. [2022-01-18 15:43:55,485 INFO L78 Accepts]: Start accepts. Automaton has 1629 states and 7045 transitions. Word has length 29 [2022-01-18 15:43:55,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:43:55,486 INFO L470 AbstractCegarLoop]: Abstraction has 1629 states and 7045 transitions. [2022-01-18 15:43:55,486 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.65) internal successors, (73), 19 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:43:55,486 INFO L276 IsEmpty]: Start isEmpty. Operand 1629 states and 7045 transitions. [2022-01-18 15:43:55,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-01-18 15:43:55,488 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:43:55,489 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:43:55,504 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2022-01-18 15:43:55,691 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,SelfDestructingSolverStorable30 [2022-01-18 15:43:55,691 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-01-18 15:43:55,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:43:55,692 INFO L85 PathProgramCache]: Analyzing trace with hash -2081372641, now seen corresponding path program 12 times [2022-01-18 15:43:55,692 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:43:55,692 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2137296567] [2022-01-18 15:43:55,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:43:55,692 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:43:55,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:43:55,807 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:43:55,807 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:43:55,807 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2137296567] [2022-01-18 15:43:55,807 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2137296567] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:43:55,807 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [487302497] [2022-01-18 15:43:55,807 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 15:43:55,807 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:43:55,807 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:43:55,808 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:43:55,810 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-01-18 15:43:55,838 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-01-18 15:43:55,838 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:43:55,838 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2022-01-18 15:43:55,839 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:43:55,963 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:43:55,964 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 17 [2022-01-18 15:43:56,154 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:43:56,155 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:43:56,295 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:43:56,295 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [487302497] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:43:56,295 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:43:56,295 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 19 [2022-01-18 15:43:56,295 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [622478467] [2022-01-18 15:43:56,295 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:43:56,295 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 15:43:56,295 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:43:56,296 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 15:43:56,296 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=329, Unknown=0, NotChecked=0, Total=380 [2022-01-18 15:43:56,296 INFO L87 Difference]: Start difference. First operand 1629 states and 7045 transitions. Second operand has 20 states, 20 states have (on average 2.85) 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 15:43:56,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:43:56,798 INFO L93 Difference]: Finished difference Result 1983 states and 8362 transitions. [2022-01-18 15:43:56,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-18 15:43:56,798 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.85) 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 29 [2022-01-18 15:43:56,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:43:56,802 INFO L225 Difference]: With dead ends: 1983 [2022-01-18 15:43:56,802 INFO L226 Difference]: Without dead ends: 1964 [2022-01-18 15:43:56,803 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 45 SyntacticMatches, 3 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=99, Invalid=551, Unknown=0, NotChecked=0, Total=650 [2022-01-18 15:43:56,803 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 130 mSDsluCounter, 834 mSDsCounter, 0 mSdLazyCounter, 1143 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 130 SdHoareTripleChecker+Valid, 332 SdHoareTripleChecker+Invalid, 1146 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 1143 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 15:43:56,803 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [130 Valid, 332 Invalid, 1146 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 1143 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-18 15:43:56,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1964 states. [2022-01-18 15:43:56,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1964 to 1617. [2022-01-18 15:43:56,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1617 states, 1616 states have (on average 4.3316831683168315) internal successors, (7000), 1616 states have internal predecessors, (7000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:43:56,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1617 states to 1617 states and 7000 transitions. [2022-01-18 15:43:56,827 INFO L78 Accepts]: Start accepts. Automaton has 1617 states and 7000 transitions. Word has length 29 [2022-01-18 15:43:56,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:43:56,827 INFO L470 AbstractCegarLoop]: Abstraction has 1617 states and 7000 transitions. [2022-01-18 15:43:56,827 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.85) 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 15:43:56,827 INFO L276 IsEmpty]: Start isEmpty. Operand 1617 states and 7000 transitions. [2022-01-18 15:43:56,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-01-18 15:43:56,830 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:43:56,830 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:43:56,847 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2022-01-18 15:43:57,045 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:43:57,046 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-01-18 15:43:57,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:43:57,046 INFO L85 PathProgramCache]: Analyzing trace with hash 74229341, now seen corresponding path program 13 times [2022-01-18 15:43:57,046 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:43:57,046 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1972940990] [2022-01-18 15:43:57,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:43:57,046 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:43:57,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:43:57,144 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:43:57,145 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:43:57,145 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1972940990] [2022-01-18 15:43:57,145 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1972940990] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:43:57,145 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [40299399] [2022-01-18 15:43:57,145 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 15:43:57,145 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:43:57,145 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:43:57,146 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:43:57,147 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-01-18 15:43:57,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:43:57,177 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2022-01-18 15:43:57,178 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:43:57,363 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2022-01-18 15:43:57,450 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:43:57,450 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:43:57,579 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:43:57,580 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 22 [2022-01-18 15:43:57,588 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:43:57,589 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 7 [2022-01-18 15:43:57,635 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:43:57,636 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [40299399] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:43:57,636 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:43:57,636 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 21 [2022-01-18 15:43:57,636 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [653919457] [2022-01-18 15:43:57,636 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:43:57,636 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 15:43:57,636 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:43:57,636 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 15:43:57,636 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=407, Unknown=0, NotChecked=0, Total=462 [2022-01-18 15:43:57,636 INFO L87 Difference]: Start difference. First operand 1617 states and 7000 transitions. Second operand has 22 states, 22 states have (on average 3.5454545454545454) internal successors, (78), 21 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:43:58,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:43:58,501 INFO L93 Difference]: Finished difference Result 2035 states and 8556 transitions. [2022-01-18 15:43:58,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-01-18 15:43:58,501 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.5454545454545454) internal successors, (78), 21 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-01-18 15:43:58,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:43:58,506 INFO L225 Difference]: With dead ends: 2035 [2022-01-18 15:43:58,506 INFO L226 Difference]: Without dead ends: 2016 [2022-01-18 15:43:58,506 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 43 SyntacticMatches, 3 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 258 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=184, Invalid=1222, Unknown=0, NotChecked=0, Total=1406 [2022-01-18 15:43:58,506 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 345 mSDsluCounter, 1085 mSDsCounter, 0 mSdLazyCounter, 1449 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 345 SdHoareTripleChecker+Valid, 420 SdHoareTripleChecker+Invalid, 1491 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 1449 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 15:43:58,507 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [345 Valid, 420 Invalid, 1491 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 1449 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-18 15:43:58,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2016 states. [2022-01-18 15:43:58,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2016 to 1620. [2022-01-18 15:43:58,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1620 states, 1619 states have (on average 4.32674490426189) internal successors, (7005), 1619 states have internal predecessors, (7005), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:43:58,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1620 states to 1620 states and 7005 transitions. [2022-01-18 15:43:58,545 INFO L78 Accepts]: Start accepts. Automaton has 1620 states and 7005 transitions. Word has length 29 [2022-01-18 15:43:58,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:43:58,545 INFO L470 AbstractCegarLoop]: Abstraction has 1620 states and 7005 transitions. [2022-01-18 15:43:58,545 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 3.5454545454545454) internal successors, (78), 21 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:43:58,545 INFO L276 IsEmpty]: Start isEmpty. Operand 1620 states and 7005 transitions. [2022-01-18 15:43:58,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-01-18 15:43:58,548 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:43:58,548 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:43:58,567 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 15:43:58,763 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:43:58,763 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-01-18 15:43:58,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:43:58,764 INFO L85 PathProgramCache]: Analyzing trace with hash 2144591933, now seen corresponding path program 14 times [2022-01-18 15:43:58,764 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:43:58,764 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [964762862] [2022-01-18 15:43:58,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:43:58,764 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:43:58,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:43:58,861 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:43:58,861 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:43:58,861 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [964762862] [2022-01-18 15:43:58,861 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [964762862] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:43:58,861 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1746351766] [2022-01-18 15:43:58,861 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 15:43:58,861 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:43:58,861 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:43:58,862 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:43:58,891 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-01-18 15:43:58,897 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:43:58,897 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:43:58,897 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2022-01-18 15:43:58,898 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:43:59,091 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:43:59,091 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 21 [2022-01-18 15:43:59,248 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:43:59,248 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:43:59,374 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:43:59,374 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1746351766] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:43:59,375 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:43:59,375 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 19 [2022-01-18 15:43:59,375 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2103636441] [2022-01-18 15:43:59,375 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:43:59,375 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 15:43:59,375 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:43:59,375 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 15:43:59,375 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=329, Unknown=0, NotChecked=0, Total=380 [2022-01-18 15:43:59,375 INFO L87 Difference]: Start difference. First operand 1620 states and 7005 transitions. Second operand has 20 states, 20 states have (on average 2.85) 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 15:43:59,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:43:59,801 INFO L93 Difference]: Finished difference Result 1952 states and 8242 transitions. [2022-01-18 15:43:59,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-18 15:43:59,801 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.85) 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 29 [2022-01-18 15:43:59,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:43:59,805 INFO L225 Difference]: With dead ends: 1952 [2022-01-18 15:43:59,805 INFO L226 Difference]: Without dead ends: 1933 [2022-01-18 15:43:59,806 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 45 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=92, Invalid=508, Unknown=0, NotChecked=0, Total=600 [2022-01-18 15:43:59,806 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 148 mSDsluCounter, 684 mSDsCounter, 0 mSdLazyCounter, 923 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 148 SdHoareTripleChecker+Valid, 272 SdHoareTripleChecker+Invalid, 926 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 923 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 15:43:59,806 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [148 Valid, 272 Invalid, 926 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 923 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 15:43:59,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1933 states. [2022-01-18 15:43:59,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1933 to 1617. [2022-01-18 15:43:59,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1617 states, 1616 states have (on average 4.329207920792079) internal successors, (6996), 1616 states have internal predecessors, (6996), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:43:59,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1617 states to 1617 states and 6996 transitions. [2022-01-18 15:43:59,829 INFO L78 Accepts]: Start accepts. Automaton has 1617 states and 6996 transitions. Word has length 29 [2022-01-18 15:43:59,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:43:59,829 INFO L470 AbstractCegarLoop]: Abstraction has 1617 states and 6996 transitions. [2022-01-18 15:43:59,829 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.85) 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 15:43:59,829 INFO L276 IsEmpty]: Start isEmpty. Operand 1617 states and 6996 transitions. [2022-01-18 15:43:59,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-01-18 15:43:59,832 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:43:59,832 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:43:59,847 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2022-01-18 15:44:00,032 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:44:00,033 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-01-18 15:44:00,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:44:00,033 INFO L85 PathProgramCache]: Analyzing trace with hash -1194824863, now seen corresponding path program 15 times [2022-01-18 15:44:00,033 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:44:00,033 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [463504068] [2022-01-18 15:44:00,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:44:00,033 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:44:00,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:44:00,132 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:44:00,132 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:44:00,132 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [463504068] [2022-01-18 15:44:00,132 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [463504068] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:44:00,132 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [595938786] [2022-01-18 15:44:00,132 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 15:44:00,132 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:44:00,132 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:44:00,133 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:44:00,133 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-01-18 15:44:00,162 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-01-18 15:44:00,163 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:44:00,163 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2022-01-18 15:44:00,164 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:44:00,305 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:44:00,305 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-18 15:44:00,460 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:44:00,461 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:44:00,584 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:44:00,584 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [595938786] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:44:00,584 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:44:00,584 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 19 [2022-01-18 15:44:00,584 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1786893448] [2022-01-18 15:44:00,584 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:44:00,584 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 15:44:00,585 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:44:00,585 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 15:44:00,585 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=319, Unknown=0, NotChecked=0, Total=380 [2022-01-18 15:44:00,585 INFO L87 Difference]: Start difference. First operand 1617 states and 6996 transitions. Second operand has 20 states, 20 states have (on average 2.8) internal successors, (56), 19 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 15:44:01,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:44:01,160 INFO L93 Difference]: Finished difference Result 2176 states and 9141 transitions. [2022-01-18 15:44:01,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-01-18 15:44:01,161 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.8) internal successors, (56), 19 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 29 [2022-01-18 15:44:01,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:44:01,165 INFO L225 Difference]: With dead ends: 2176 [2022-01-18 15:44:01,165 INFO L226 Difference]: Without dead ends: 2157 [2022-01-18 15:44:01,166 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 45 SyntacticMatches, 3 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 212 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=149, Invalid=663, Unknown=0, NotChecked=0, Total=812 [2022-01-18 15:44:01,166 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 329 mSDsluCounter, 828 mSDsCounter, 0 mSdLazyCounter, 1142 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 329 SdHoareTripleChecker+Valid, 333 SdHoareTripleChecker+Invalid, 1159 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 1142 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 15:44:01,166 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [329 Valid, 333 Invalid, 1159 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 1142 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-18 15:44:01,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2157 states. [2022-01-18 15:44:01,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2157 to 1698. [2022-01-18 15:44:01,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1698 states, 1697 states have (on average 4.342958161461403) internal successors, (7370), 1697 states have internal predecessors, (7370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:44:01,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1698 states to 1698 states and 7370 transitions. [2022-01-18 15:44:01,205 INFO L78 Accepts]: Start accepts. Automaton has 1698 states and 7370 transitions. Word has length 29 [2022-01-18 15:44:01,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:44:01,205 INFO L470 AbstractCegarLoop]: Abstraction has 1698 states and 7370 transitions. [2022-01-18 15:44:01,205 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.8) internal successors, (56), 19 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 15:44:01,205 INFO L276 IsEmpty]: Start isEmpty. Operand 1698 states and 7370 transitions. [2022-01-18 15:44:01,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-01-18 15:44:01,208 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:44:01,208 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:44:01,226 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2022-01-18 15:44:01,423 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,SelfDestructingSolverStorable34 [2022-01-18 15:44:01,423 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-01-18 15:44:01,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:44:01,424 INFO L85 PathProgramCache]: Analyzing trace with hash 108447743, now seen corresponding path program 16 times [2022-01-18 15:44:01,424 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:44:01,424 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [745173714] [2022-01-18 15:44:01,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:44:01,424 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:44:01,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:44:01,509 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:44:01,509 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:44:01,509 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [745173714] [2022-01-18 15:44:01,509 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [745173714] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:44:01,509 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1914002302] [2022-01-18 15:44:01,509 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 15:44:01,509 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:44:01,509 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:44:01,511 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:44:01,512 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-01-18 15:44:01,543 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 15:44:01,543 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:44:01,544 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2022-01-18 15:44:01,545 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:44:01,707 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2022-01-18 15:44:01,805 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:44:01,805 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:44:01,912 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:44:01,912 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 22 [2022-01-18 15:44:01,924 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:44:01,924 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 7 [2022-01-18 15:44:01,986 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:44:01,986 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1914002302] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:44:01,986 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:44:01,986 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 19 [2022-01-18 15:44:01,986 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1630197071] [2022-01-18 15:44:01,986 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:44:01,986 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 15:44:01,986 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:44:01,987 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 15:44:01,987 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=317, Unknown=0, NotChecked=0, Total=380 [2022-01-18 15:44:01,987 INFO L87 Difference]: Start difference. First operand 1698 states and 7370 transitions. Second operand has 20 states, 20 states have (on average 3.7) internal successors, (74), 19 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:44:02,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:44:02,777 INFO L93 Difference]: Finished difference Result 2754 states and 11325 transitions. [2022-01-18 15:44:02,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-01-18 15:44:02,777 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.7) internal successors, (74), 19 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-01-18 15:44:02,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:44:02,783 INFO L225 Difference]: With dead ends: 2754 [2022-01-18 15:44:02,783 INFO L226 Difference]: Without dead ends: 2726 [2022-01-18 15:44:02,784 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 45 SyntacticMatches, 3 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 243 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=172, Invalid=884, Unknown=0, NotChecked=0, Total=1056 [2022-01-18 15:44:02,784 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 381 mSDsluCounter, 1160 mSDsCounter, 0 mSdLazyCounter, 1548 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 381 SdHoareTripleChecker+Valid, 472 SdHoareTripleChecker+Invalid, 1576 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 1548 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 15:44:02,784 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [381 Valid, 472 Invalid, 1576 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 1548 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-18 15:44:02,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2726 states. [2022-01-18 15:44:02,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2726 to 1807. [2022-01-18 15:44:02,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1807 states, 1806 states have (on average 4.377630121816169) internal successors, (7906), 1806 states have internal predecessors, (7906), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:44:02,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1807 states to 1807 states and 7906 transitions. [2022-01-18 15:44:02,817 INFO L78 Accepts]: Start accepts. Automaton has 1807 states and 7906 transitions. Word has length 29 [2022-01-18 15:44:02,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:44:02,817 INFO L470 AbstractCegarLoop]: Abstraction has 1807 states and 7906 transitions. [2022-01-18 15:44:02,817 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.7) internal successors, (74), 19 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:44:02,817 INFO L276 IsEmpty]: Start isEmpty. Operand 1807 states and 7906 transitions. [2022-01-18 15:44:02,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-01-18 15:44:02,820 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:44:02,820 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:44:02,836 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2022-01-18 15:44:03,021 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2022-01-18 15:44:03,021 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-01-18 15:44:03,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:44:03,021 INFO L85 PathProgramCache]: Analyzing trace with hash 55061223, now seen corresponding path program 17 times [2022-01-18 15:44:03,021 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:44:03,021 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [592912472] [2022-01-18 15:44:03,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:44:03,021 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:44:03,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:44:03,104 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:44:03,104 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:44:03,104 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [592912472] [2022-01-18 15:44:03,104 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [592912472] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:44:03,104 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1855190402] [2022-01-18 15:44:03,104 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 15:44:03,104 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:44:03,105 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:44:03,105 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:44:03,106 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2022-01-18 15:44:03,137 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:44:03,137 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:44:03,138 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2022-01-18 15:44:03,138 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:44:03,329 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2022-01-18 15:44:03,416 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:44:03,416 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:44:03,521 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:44:03,522 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 22 [2022-01-18 15:44:03,540 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:44:03,540 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 7 [2022-01-18 15:44:03,610 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:44:03,610 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1855190402] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:44:03,610 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:44:03,610 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 19 [2022-01-18 15:44:03,610 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2123009043] [2022-01-18 15:44:03,610 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:44:03,611 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 15:44:03,611 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:44:03,611 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 15:44:03,611 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=317, Unknown=0, NotChecked=0, Total=380 [2022-01-18 15:44:03,611 INFO L87 Difference]: Start difference. First operand 1807 states and 7906 transitions. Second operand has 20 states, 20 states have (on average 3.65) internal successors, (73), 19 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:44:04,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:44:04,356 INFO L93 Difference]: Finished difference Result 2761 states and 11342 transitions. [2022-01-18 15:44:04,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-01-18 15:44:04,356 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.65) internal successors, (73), 19 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-01-18 15:44:04,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:44:04,362 INFO L225 Difference]: With dead ends: 2761 [2022-01-18 15:44:04,362 INFO L226 Difference]: Without dead ends: 2728 [2022-01-18 15:44:04,363 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 45 SyntacticMatches, 3 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 239 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=176, Invalid=880, Unknown=0, NotChecked=0, Total=1056 [2022-01-18 15:44:04,363 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 383 mSDsluCounter, 1090 mSDsCounter, 0 mSdLazyCounter, 1502 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 383 SdHoareTripleChecker+Valid, 455 SdHoareTripleChecker+Invalid, 1533 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 1502 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 15:44:04,363 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [383 Valid, 455 Invalid, 1533 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 1502 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-18 15:44:04,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2728 states. [2022-01-18 15:44:04,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2728 to 1767. [2022-01-18 15:44:04,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1767 states, 1766 states have (on average 4.377689694224236) internal successors, (7731), 1766 states have internal predecessors, (7731), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:44:04,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1767 states to 1767 states and 7731 transitions. [2022-01-18 15:44:04,394 INFO L78 Accepts]: Start accepts. Automaton has 1767 states and 7731 transitions. Word has length 29 [2022-01-18 15:44:04,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:44:04,395 INFO L470 AbstractCegarLoop]: Abstraction has 1767 states and 7731 transitions. [2022-01-18 15:44:04,395 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.65) internal successors, (73), 19 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:44:04,395 INFO L276 IsEmpty]: Start isEmpty. Operand 1767 states and 7731 transitions. [2022-01-18 15:44:04,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-01-18 15:44:04,398 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:44:04,398 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:44:04,413 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 15:44:04,608 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:44:04,609 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-01-18 15:44:04,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:44:04,609 INFO L85 PathProgramCache]: Analyzing trace with hash 2117890319, now seen corresponding path program 18 times [2022-01-18 15:44:04,609 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:44:04,609 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1907488746] [2022-01-18 15:44:04,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:44:04,609 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:44:04,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:44:04,698 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:44:04,698 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:44:04,698 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1907488746] [2022-01-18 15:44:04,698 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1907488746] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:44:04,698 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2046517214] [2022-01-18 15:44:04,698 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 15:44:04,699 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:44:04,699 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:44:04,699 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:44:04,700 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2022-01-18 15:44:04,728 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-01-18 15:44:04,728 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:44:04,729 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2022-01-18 15:44:04,729 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:44:04,881 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:44:04,881 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-18 15:44:05,053 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:44:05,053 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:44:05,177 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:44:05,177 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2046517214] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:44:05,177 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:44:05,177 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 19 [2022-01-18 15:44:05,177 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [316803014] [2022-01-18 15:44:05,177 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:44:05,177 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 15:44:05,177 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:44:05,178 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 15:44:05,178 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=329, Unknown=0, NotChecked=0, Total=380 [2022-01-18 15:44:05,178 INFO L87 Difference]: Start difference. First operand 1767 states and 7731 transitions. Second operand has 20 states, 20 states have (on average 2.75) 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 15:44:05,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:44:05,663 INFO L93 Difference]: Finished difference Result 2094 states and 8952 transitions. [2022-01-18 15:44:05,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-18 15:44:05,663 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.75) 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 29 [2022-01-18 15:44:05,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:44:05,668 INFO L225 Difference]: With dead ends: 2094 [2022-01-18 15:44:05,668 INFO L226 Difference]: Without dead ends: 2079 [2022-01-18 15:44:05,669 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 45 SyntacticMatches, 3 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=99, Invalid=551, Unknown=0, NotChecked=0, Total=650 [2022-01-18 15:44:05,669 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 144 mSDsluCounter, 760 mSDsCounter, 0 mSdLazyCounter, 1062 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 144 SdHoareTripleChecker+Valid, 319 SdHoareTripleChecker+Invalid, 1065 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 1062 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 15:44:05,669 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [144 Valid, 319 Invalid, 1065 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 1062 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-18 15:44:05,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2079 states. [2022-01-18 15:44:05,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2079 to 1755. [2022-01-18 15:44:05,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1755 states, 1754 states have (on average 4.379703534777651) internal successors, (7682), 1754 states have internal predecessors, (7682), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:44:05,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1755 states to 1755 states and 7682 transitions. [2022-01-18 15:44:05,695 INFO L78 Accepts]: Start accepts. Automaton has 1755 states and 7682 transitions. Word has length 29 [2022-01-18 15:44:05,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:44:05,695 INFO L470 AbstractCegarLoop]: Abstraction has 1755 states and 7682 transitions. [2022-01-18 15:44:05,695 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.75) 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 15:44:05,695 INFO L276 IsEmpty]: Start isEmpty. Operand 1755 states and 7682 transitions. [2022-01-18 15:44:05,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-01-18 15:44:05,699 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:44:05,699 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:44:05,714 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 15:44:05,914 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,SelfDestructingSolverStorable37 [2022-01-18 15:44:05,914 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-01-18 15:44:05,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:44:05,915 INFO L85 PathProgramCache]: Analyzing trace with hash -101621211, now seen corresponding path program 19 times [2022-01-18 15:44:05,915 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:44:05,915 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1167065700] [2022-01-18 15:44:05,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:44:05,915 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:44:05,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:44:05,999 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:44:05,999 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:44:05,999 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1167065700] [2022-01-18 15:44:05,999 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1167065700] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:44:05,999 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1358363830] [2022-01-18 15:44:06,000 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 15:44:06,000 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:44:06,000 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:44:06,000 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:44:06,001 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2022-01-18 15:44:06,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:44:06,030 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2022-01-18 15:44:06,030 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:44:06,242 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2022-01-18 15:44:06,301 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:44:06,301 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:44:06,423 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:44:06,423 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 22 [2022-01-18 15:44:06,431 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:44:06,431 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 7 [2022-01-18 15:44:06,491 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:44:06,491 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1358363830] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:44:06,491 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:44:06,491 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 21 [2022-01-18 15:44:06,491 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1160905215] [2022-01-18 15:44:06,491 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:44:06,491 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 15:44:06,491 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:44:06,491 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 15:44:06,492 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=407, Unknown=0, NotChecked=0, Total=462 [2022-01-18 15:44:06,492 INFO L87 Difference]: Start difference. First operand 1755 states and 7682 transitions. Second operand has 22 states, 22 states have (on average 3.4545454545454546) internal successors, (76), 21 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:44:07,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:44:07,442 INFO L93 Difference]: Finished difference Result 2126 states and 9072 transitions. [2022-01-18 15:44:07,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-01-18 15:44:07,443 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.4545454545454546) internal successors, (76), 21 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-01-18 15:44:07,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:44:07,447 INFO L225 Difference]: With dead ends: 2126 [2022-01-18 15:44:07,448 INFO L226 Difference]: Without dead ends: 2111 [2022-01-18 15:44:07,448 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 43 SyntacticMatches, 3 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 258 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=184, Invalid=1222, Unknown=0, NotChecked=0, Total=1406 [2022-01-18 15:44:07,448 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 252 mSDsluCounter, 1263 mSDsCounter, 0 mSdLazyCounter, 1718 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 252 SdHoareTripleChecker+Valid, 520 SdHoareTripleChecker+Invalid, 1752 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 1718 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 15:44:07,448 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [252 Valid, 520 Invalid, 1752 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 1718 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-18 15:44:07,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2111 states. [2022-01-18 15:44:07,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2111 to 1767. [2022-01-18 15:44:07,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1767 states, 1766 states have (on average 4.36806342015855) internal successors, (7714), 1766 states have internal predecessors, (7714), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:44:07,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1767 states to 1767 states and 7714 transitions. [2022-01-18 15:44:07,474 INFO L78 Accepts]: Start accepts. Automaton has 1767 states and 7714 transitions. Word has length 29 [2022-01-18 15:44:07,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:44:07,474 INFO L470 AbstractCegarLoop]: Abstraction has 1767 states and 7714 transitions. [2022-01-18 15:44:07,474 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 3.4545454545454546) internal successors, (76), 21 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:44:07,474 INFO L276 IsEmpty]: Start isEmpty. Operand 1767 states and 7714 transitions. [2022-01-18 15:44:07,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-01-18 15:44:07,478 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:44:07,478 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:44:07,493 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2022-01-18 15:44:07,678 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,SelfDestructingSolverStorable38 [2022-01-18 15:44:07,678 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-01-18 15:44:07,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:44:07,678 INFO L85 PathProgramCache]: Analyzing trace with hash 332408135, now seen corresponding path program 20 times [2022-01-18 15:44:07,678 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:44:07,679 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1541842713] [2022-01-18 15:44:07,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:44:07,679 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:44:07,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:44:07,773 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:44:07,773 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:44:07,773 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1541842713] [2022-01-18 15:44:07,773 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1541842713] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:44:07,773 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1001200193] [2022-01-18 15:44:07,773 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 15:44:07,773 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:44:07,773 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:44:07,774 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:44:07,775 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2022-01-18 15:44:07,803 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:44:07,803 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:44:07,804 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2022-01-18 15:44:07,804 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:44:07,992 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:44:07,992 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-18 15:44:08,122 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:44:08,123 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:44:08,294 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:44:08,294 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1001200193] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:44:08,294 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:44:08,294 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 21 [2022-01-18 15:44:08,294 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1921590173] [2022-01-18 15:44:08,294 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:44:08,294 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 15:44:08,294 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:44:08,295 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 15:44:08,295 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=402, Unknown=0, NotChecked=0, Total=462 [2022-01-18 15:44:08,295 INFO L87 Difference]: Start difference. First operand 1767 states and 7714 transitions. Second operand has 22 states, 22 states have (on average 2.727272727272727) internal successors, (60), 21 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:44:08,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:44:08,890 INFO L93 Difference]: Finished difference Result 2191 states and 9154 transitions. [2022-01-18 15:44:08,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-01-18 15:44:08,891 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.727272727272727) internal successors, (60), 21 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 29 [2022-01-18 15:44:08,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:44:08,895 INFO L225 Difference]: With dead ends: 2191 [2022-01-18 15:44:08,895 INFO L226 Difference]: Without dead ends: 2176 [2022-01-18 15:44:08,896 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 43 SyntacticMatches, 3 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 226 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=149, Invalid=843, Unknown=0, NotChecked=0, Total=992 [2022-01-18 15:44:08,896 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 265 mSDsluCounter, 871 mSDsCounter, 0 mSdLazyCounter, 1157 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 265 SdHoareTripleChecker+Valid, 359 SdHoareTripleChecker+Invalid, 1178 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 1157 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 15:44:08,896 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [265 Valid, 359 Invalid, 1178 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 1157 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-18 15:44:08,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2176 states. [2022-01-18 15:44:08,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2176 to 1764. [2022-01-18 15:44:08,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1764 states, 1763 states have (on average 4.3698241633579125) internal successors, (7704), 1763 states have internal predecessors, (7704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:44:08,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1764 states to 1764 states and 7704 transitions. [2022-01-18 15:44:08,928 INFO L78 Accepts]: Start accepts. Automaton has 1764 states and 7704 transitions. Word has length 29 [2022-01-18 15:44:08,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:44:08,928 INFO L470 AbstractCegarLoop]: Abstraction has 1764 states and 7704 transitions. [2022-01-18 15:44:08,928 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.727272727272727) internal successors, (60), 21 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:44:08,928 INFO L276 IsEmpty]: Start isEmpty. Operand 1764 states and 7704 transitions. [2022-01-18 15:44:08,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-01-18 15:44:08,931 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:44:08,931 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:44:08,946 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Ended with exit code 0 [2022-01-18 15:44:09,146 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,SelfDestructingSolverStorable39 [2022-01-18 15:44:09,146 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-01-18 15:44:09,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:44:09,147 INFO L85 PathProgramCache]: Analyzing trace with hash 754462757, now seen corresponding path program 21 times [2022-01-18 15:44:09,147 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:44:09,147 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [888907759] [2022-01-18 15:44:09,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:44:09,147 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:44:09,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:44:09,262 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:44:09,262 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:44:09,262 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [888907759] [2022-01-18 15:44:09,262 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [888907759] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:44:09,262 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [473158877] [2022-01-18 15:44:09,262 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 15:44:09,262 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:44:09,263 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:44:09,264 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:44:09,265 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2022-01-18 15:44:09,295 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-01-18 15:44:09,295 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:44:09,296 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2022-01-18 15:44:09,297 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:44:09,452 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:44:09,452 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2022-01-18 15:44:09,677 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:44:09,677 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:44:09,831 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:44:09,831 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [473158877] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:44:09,831 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:44:09,832 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 20 [2022-01-18 15:44:09,832 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [332571622] [2022-01-18 15:44:09,832 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:44:09,832 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 15:44:09,832 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:44:09,832 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 15:44:09,832 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=349, Unknown=0, NotChecked=0, Total=420 [2022-01-18 15:44:09,832 INFO L87 Difference]: Start difference. First operand 1764 states and 7704 transitions. Second operand has 21 states, 21 states have (on average 2.7142857142857144) 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 15:44:10,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:44:10,408 INFO L93 Difference]: Finished difference Result 2126 states and 9065 transitions. [2022-01-18 15:44:10,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-01-18 15:44:10,409 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.7142857142857144) 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 29 [2022-01-18 15:44:10,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:44:10,413 INFO L225 Difference]: With dead ends: 2126 [2022-01-18 15:44:10,413 INFO L226 Difference]: Without dead ends: 2107 [2022-01-18 15:44:10,413 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 44 SyntacticMatches, 3 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 228 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=178, Invalid=692, Unknown=0, NotChecked=0, Total=870 [2022-01-18 15:44:10,414 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 332 mSDsluCounter, 798 mSDsCounter, 0 mSdLazyCounter, 1105 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 332 SdHoareTripleChecker+Valid, 320 SdHoareTripleChecker+Invalid, 1125 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 1105 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 15:44:10,414 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [332 Valid, 320 Invalid, 1125 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 1105 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-18 15:44:10,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2107 states. [2022-01-18 15:44:10,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2107 to 1794. [2022-01-18 15:44:10,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1794 states, 1793 states have (on average 4.37590630228667) internal successors, (7846), 1793 states have internal predecessors, (7846), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:44:10,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1794 states to 1794 states and 7846 transitions. [2022-01-18 15:44:10,441 INFO L78 Accepts]: Start accepts. Automaton has 1794 states and 7846 transitions. Word has length 29 [2022-01-18 15:44:10,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:44:10,441 INFO L470 AbstractCegarLoop]: Abstraction has 1794 states and 7846 transitions. [2022-01-18 15:44:10,441 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.7142857142857144) 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 15:44:10,441 INFO L276 IsEmpty]: Start isEmpty. Operand 1794 states and 7846 transitions. [2022-01-18 15:44:10,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-01-18 15:44:10,445 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:44:10,445 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:44:10,460 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 15:44:10,646 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:44:10,646 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-01-18 15:44:10,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:44:10,646 INFO L85 PathProgramCache]: Analyzing trace with hash 2057735363, now seen corresponding path program 22 times [2022-01-18 15:44:10,646 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:44:10,646 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1497415580] [2022-01-18 15:44:10,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:44:10,647 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:44:10,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:44:10,738 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:44:10,738 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:44:10,738 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1497415580] [2022-01-18 15:44:10,738 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1497415580] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:44:10,738 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1023816403] [2022-01-18 15:44:10,738 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 15:44:10,738 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:44:10,738 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:44:10,739 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:44:10,740 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2022-01-18 15:44:10,769 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 15:44:10,769 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:44:10,769 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2022-01-18 15:44:10,770 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:44:10,900 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-01-18 15:44:11,007 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:44:11,007 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:44:11,103 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:44:11,103 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 22 [2022-01-18 15:44:11,114 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:44:11,115 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 7 [2022-01-18 15:44:11,175 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:44:11,175 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1023816403] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:44:11,175 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:44:11,175 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 19 [2022-01-18 15:44:11,175 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [227498761] [2022-01-18 15:44:11,175 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:44:11,175 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 15:44:11,175 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:44:11,176 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 15:44:11,176 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=311, Unknown=0, NotChecked=0, Total=380 [2022-01-18 15:44:11,176 INFO L87 Difference]: Start difference. First operand 1794 states and 7846 transitions. Second operand has 20 states, 20 states have (on average 3.7) internal successors, (74), 19 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:44:11,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:44:11,884 INFO L93 Difference]: Finished difference Result 2562 states and 10721 transitions. [2022-01-18 15:44:11,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-01-18 15:44:11,890 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.7) internal successors, (74), 19 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-01-18 15:44:11,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:44:11,896 INFO L225 Difference]: With dead ends: 2562 [2022-01-18 15:44:11,896 INFO L226 Difference]: Without dead ends: 2534 [2022-01-18 15:44:11,896 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 45 SyntacticMatches, 3 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 236 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=189, Invalid=803, Unknown=0, NotChecked=0, Total=992 [2022-01-18 15:44:11,896 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 338 mSDsluCounter, 1082 mSDsCounter, 0 mSdLazyCounter, 1434 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 338 SdHoareTripleChecker+Valid, 415 SdHoareTripleChecker+Invalid, 1461 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 1434 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 15:44:11,896 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [338 Valid, 415 Invalid, 1461 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 1434 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-18 15:44:11,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2534 states. [2022-01-18 15:44:11,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2534 to 1885. [2022-01-18 15:44:11,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1885 states, 1884 states have (on average 4.397027600849257) internal successors, (8284), 1884 states have internal predecessors, (8284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:44:11,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1885 states to 1885 states and 8284 transitions. [2022-01-18 15:44:11,928 INFO L78 Accepts]: Start accepts. Automaton has 1885 states and 8284 transitions. Word has length 29 [2022-01-18 15:44:11,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:44:11,928 INFO L470 AbstractCegarLoop]: Abstraction has 1885 states and 8284 transitions. [2022-01-18 15:44:11,928 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.7) internal successors, (74), 19 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:44:11,928 INFO L276 IsEmpty]: Start isEmpty. Operand 1885 states and 8284 transitions. [2022-01-18 15:44:11,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-01-18 15:44:11,931 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:44:11,931 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:44:11,947 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Ended with exit code 0 [2022-01-18 15:44:12,132 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:44:12,132 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-01-18 15:44:12,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:44:12,132 INFO L85 PathProgramCache]: Analyzing trace with hash 2004348843, now seen corresponding path program 23 times [2022-01-18 15:44:12,132 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:44:12,132 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1345853433] [2022-01-18 15:44:12,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:44:12,132 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:44:12,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:44:12,233 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:44:12,233 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:44:12,233 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1345853433] [2022-01-18 15:44:12,233 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1345853433] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:44:12,233 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1020203134] [2022-01-18 15:44:12,233 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 15:44:12,233 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:44:12,234 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:44:12,234 INFO L229 MonitoredProcess]: Starting monitored process 39 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:44:12,235 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2022-01-18 15:44:12,265 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:44:12,265 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:44:12,266 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2022-01-18 15:44:12,267 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:44:12,441 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-01-18 15:44:12,555 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:44:12,555 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:44:12,657 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:44:12,657 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 22 [2022-01-18 15:44:12,666 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:44:12,666 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 7 [2022-01-18 15:44:12,723 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:44:12,724 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1020203134] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:44:12,724 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:44:12,724 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 19 [2022-01-18 15:44:12,724 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [999825724] [2022-01-18 15:44:12,724 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:44:12,724 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 15:44:12,724 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:44:12,724 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 15:44:12,724 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=311, Unknown=0, NotChecked=0, Total=380 [2022-01-18 15:44:12,724 INFO L87 Difference]: Start difference. First operand 1885 states and 8284 transitions. Second operand has 20 states, 20 states have (on average 3.65) internal successors, (73), 19 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:44:13,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:44:13,393 INFO L93 Difference]: Finished difference Result 2569 states and 10738 transitions. [2022-01-18 15:44:13,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-01-18 15:44:13,393 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.65) internal successors, (73), 19 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-01-18 15:44:13,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:44:13,399 INFO L225 Difference]: With dead ends: 2569 [2022-01-18 15:44:13,399 INFO L226 Difference]: Without dead ends: 2536 [2022-01-18 15:44:13,399 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 45 SyntacticMatches, 3 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 251 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=202, Invalid=854, Unknown=0, NotChecked=0, Total=1056 [2022-01-18 15:44:13,399 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 400 mSDsluCounter, 891 mSDsCounter, 0 mSdLazyCounter, 1187 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 400 SdHoareTripleChecker+Valid, 355 SdHoareTripleChecker+Invalid, 1227 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 1187 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 15:44:13,399 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [400 Valid, 355 Invalid, 1227 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 1187 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-18 15:44:13,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2536 states. [2022-01-18 15:44:13,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2536 to 1824. [2022-01-18 15:44:13,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1824 states, 1823 states have (on average 4.393307734503566) internal successors, (8009), 1823 states have internal predecessors, (8009), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:44:13,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1824 states to 1824 states and 8009 transitions. [2022-01-18 15:44:13,430 INFO L78 Accepts]: Start accepts. Automaton has 1824 states and 8009 transitions. Word has length 29 [2022-01-18 15:44:13,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:44:13,430 INFO L470 AbstractCegarLoop]: Abstraction has 1824 states and 8009 transitions. [2022-01-18 15:44:13,430 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.65) internal successors, (73), 19 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:44:13,430 INFO L276 IsEmpty]: Start isEmpty. Operand 1824 states and 8009 transitions. [2022-01-18 15:44:13,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-01-18 15:44:13,434 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:44:13,434 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:44:13,449 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Ended with exit code 0 [2022-01-18 15:44:13,634 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,SelfDestructingSolverStorable42 [2022-01-18 15:44:13,634 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-01-18 15:44:13,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:44:13,635 INFO L85 PathProgramCache]: Analyzing trace with hash -227789357, now seen corresponding path program 24 times [2022-01-18 15:44:13,635 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:44:13,635 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1170751016] [2022-01-18 15:44:13,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:44:13,635 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:44:13,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:44:13,763 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:44:13,763 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:44:13,763 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1170751016] [2022-01-18 15:44:13,763 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1170751016] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:44:13,763 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [688518359] [2022-01-18 15:44:13,763 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 15:44:13,763 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:44:13,764 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:44:13,764 INFO L229 MonitoredProcess]: Starting monitored process 40 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:44:13,765 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2022-01-18 15:44:13,793 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-01-18 15:44:13,795 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:44:13,796 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2022-01-18 15:44:13,796 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:44:13,918 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:44:13,919 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2022-01-18 15:44:14,117 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:44:14,117 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:44:14,266 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:44:14,266 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [688518359] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:44:14,266 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:44:14,266 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 20 [2022-01-18 15:44:14,266 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1355453879] [2022-01-18 15:44:14,266 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:44:14,266 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 15:44:14,266 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:44:14,267 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 15:44:14,267 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=364, Unknown=0, NotChecked=0, Total=420 [2022-01-18 15:44:14,267 INFO L87 Difference]: Start difference. First operand 1824 states and 8009 transitions. Second operand has 21 states, 21 states have (on average 2.6666666666666665) internal successors, (56), 20 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 15:44:14,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:44:14,786 INFO L93 Difference]: Finished difference Result 1999 states and 8662 transitions. [2022-01-18 15:44:14,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-18 15:44:14,787 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.6666666666666665) internal successors, (56), 20 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 29 [2022-01-18 15:44:14,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:44:14,791 INFO L225 Difference]: With dead ends: 1999 [2022-01-18 15:44:14,791 INFO L226 Difference]: Without dead ends: 1984 [2022-01-18 15:44:14,791 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 44 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=102, Invalid=600, Unknown=0, NotChecked=0, Total=702 [2022-01-18 15:44:14,792 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 125 mSDsluCounter, 854 mSDsCounter, 0 mSdLazyCounter, 1204 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 125 SdHoareTripleChecker+Valid, 343 SdHoareTripleChecker+Invalid, 1207 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 1204 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 15:44:14,792 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [125 Valid, 343 Invalid, 1207 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 1204 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-18 15:44:14,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1984 states. [2022-01-18 15:44:14,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1984 to 1809. [2022-01-18 15:44:14,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1809 states, 1808 states have (on average 4.397123893805309) internal successors, (7950), 1808 states have internal predecessors, (7950), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:44:14,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1809 states to 1809 states and 7950 transitions. [2022-01-18 15:44:14,816 INFO L78 Accepts]: Start accepts. Automaton has 1809 states and 7950 transitions. Word has length 29 [2022-01-18 15:44:14,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:44:14,817 INFO L470 AbstractCegarLoop]: Abstraction has 1809 states and 7950 transitions. [2022-01-18 15:44:14,817 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.6666666666666665) internal successors, (56), 20 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 15:44:14,817 INFO L276 IsEmpty]: Start isEmpty. Operand 1809 states and 7950 transitions. [2022-01-18 15:44:14,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-01-18 15:44:14,820 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:44:14,820 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:44:14,835 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2022-01-18 15:44:15,031 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,SelfDestructingSolverStorable43 [2022-01-18 15:44:15,031 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-01-18 15:44:15,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:44:15,031 INFO L85 PathProgramCache]: Analyzing trace with hash -1276561759, now seen corresponding path program 25 times [2022-01-18 15:44:15,031 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:44:15,031 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [369543692] [2022-01-18 15:44:15,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:44:15,032 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:44:15,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:44:15,150 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:44:15,150 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:44:15,150 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [369543692] [2022-01-18 15:44:15,150 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [369543692] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:44:15,150 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2075459470] [2022-01-18 15:44:15,150 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 15:44:15,150 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:44:15,150 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:44:15,151 INFO L229 MonitoredProcess]: Starting monitored process 41 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:44:15,164 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2022-01-18 15:44:15,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:44:15,193 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2022-01-18 15:44:15,193 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:44:15,323 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-01-18 15:44:15,430 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:44:15,430 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:44:15,527 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:44:15,527 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 22 [2022-01-18 15:44:15,535 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:44:15,536 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 7 [2022-01-18 15:44:15,593 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:44:15,593 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2075459470] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:44:15,593 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:44:15,594 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 20 [2022-01-18 15:44:15,594 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [315489761] [2022-01-18 15:44:15,594 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:44:15,594 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 15:44:15,594 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:44:15,594 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 15:44:15,594 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=347, Unknown=0, NotChecked=0, Total=420 [2022-01-18 15:44:15,594 INFO L87 Difference]: Start difference. First operand 1809 states and 7950 transitions. Second operand has 21 states, 21 states have (on average 3.7142857142857144) internal successors, (78), 20 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:44:16,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:44:16,452 INFO L93 Difference]: Finished difference Result 2655 states and 11037 transitions. [2022-01-18 15:44:16,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-01-18 15:44:16,453 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.7142857142857144) internal successors, (78), 20 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-01-18 15:44:16,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:44:16,458 INFO L225 Difference]: With dead ends: 2655 [2022-01-18 15:44:16,458 INFO L226 Difference]: Without dead ends: 2617 [2022-01-18 15:44:16,459 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 44 SyntacticMatches, 3 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 346 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=257, Invalid=1149, Unknown=0, NotChecked=0, Total=1406 [2022-01-18 15:44:16,459 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 601 mSDsluCounter, 1033 mSDsCounter, 0 mSdLazyCounter, 1388 mSolverCounterSat, 80 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 601 SdHoareTripleChecker+Valid, 403 SdHoareTripleChecker+Invalid, 1468 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 80 IncrementalHoareTripleChecker+Valid, 1388 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 15:44:16,459 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [601 Valid, 403 Invalid, 1468 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [80 Valid, 1388 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-18 15:44:16,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2617 states. [2022-01-18 15:44:16,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2617 to 1921. [2022-01-18 15:44:16,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1921 states, 1920 states have (on average 4.422395833333334) internal successors, (8491), 1920 states have internal predecessors, (8491), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:44:16,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1921 states to 1921 states and 8491 transitions. [2022-01-18 15:44:16,494 INFO L78 Accepts]: Start accepts. Automaton has 1921 states and 8491 transitions. Word has length 29 [2022-01-18 15:44:16,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:44:16,495 INFO L470 AbstractCegarLoop]: Abstraction has 1921 states and 8491 transitions. [2022-01-18 15:44:16,495 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.7142857142857144) internal successors, (78), 20 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:44:16,495 INFO L276 IsEmpty]: Start isEmpty. Operand 1921 states and 8491 transitions. [2022-01-18 15:44:16,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-01-18 15:44:16,498 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:44:16,498 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:44:16,516 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2022-01-18 15:44:16,714 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,SelfDestructingSolverStorable44 [2022-01-18 15:44:16,714 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-01-18 15:44:16,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:44:16,714 INFO L85 PathProgramCache]: Analyzing trace with hash 26710847, now seen corresponding path program 26 times [2022-01-18 15:44:16,715 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:44:16,715 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [997680779] [2022-01-18 15:44:16,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:44:16,715 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:44:16,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:44:16,827 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:44:16,827 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:44:16,827 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [997680779] [2022-01-18 15:44:16,827 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [997680779] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:44:16,827 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1875842889] [2022-01-18 15:44:16,827 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 15:44:16,827 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:44:16,827 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:44:16,828 INFO L229 MonitoredProcess]: Starting monitored process 42 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:44:16,829 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2022-01-18 15:44:16,860 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:44:16,860 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:44:16,861 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2022-01-18 15:44:16,862 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:44:17,020 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:44:17,020 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2022-01-18 15:44:17,215 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:44:17,215 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:44:17,362 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:44:17,362 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1875842889] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:44:17,362 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:44:17,362 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 9] total 19 [2022-01-18 15:44:17,363 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [262193926] [2022-01-18 15:44:17,363 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:44:17,363 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 15:44:17,363 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:44:17,363 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 15:44:17,363 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=308, Unknown=0, NotChecked=0, Total=380 [2022-01-18 15:44:17,363 INFO L87 Difference]: Start difference. First operand 1921 states and 8491 transitions. Second operand has 20 states, 20 states have (on average 2.8) internal successors, (56), 19 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 15:44:17,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:44:17,942 INFO L93 Difference]: Finished difference Result 2244 states and 9582 transitions. [2022-01-18 15:44:17,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-01-18 15:44:17,942 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.8) internal successors, (56), 19 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 29 [2022-01-18 15:44:17,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:44:17,947 INFO L225 Difference]: With dead ends: 2244 [2022-01-18 15:44:17,947 INFO L226 Difference]: Without dead ends: 2231 [2022-01-18 15:44:17,947 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 45 SyntacticMatches, 3 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 194 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=172, Invalid=584, Unknown=0, NotChecked=0, Total=756 [2022-01-18 15:44:17,947 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 274 mSDsluCounter, 794 mSDsCounter, 0 mSdLazyCounter, 1107 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 274 SdHoareTripleChecker+Valid, 310 SdHoareTripleChecker+Invalid, 1121 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 1107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 15:44:17,948 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [274 Valid, 310 Invalid, 1121 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 1107 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-18 15:44:17,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2231 states. [2022-01-18 15:44:17,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2231 to 1921. [2022-01-18 15:44:17,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1921 states, 1920 states have (on average 4.420833333333333) internal successors, (8488), 1920 states have internal predecessors, (8488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:44:17,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1921 states to 1921 states and 8488 transitions. [2022-01-18 15:44:17,987 INFO L78 Accepts]: Start accepts. Automaton has 1921 states and 8488 transitions. Word has length 29 [2022-01-18 15:44:17,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:44:17,987 INFO L470 AbstractCegarLoop]: Abstraction has 1921 states and 8488 transitions. [2022-01-18 15:44:17,987 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.8) internal successors, (56), 19 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 15:44:17,987 INFO L276 IsEmpty]: Start isEmpty. Operand 1921 states and 8488 transitions. [2022-01-18 15:44:17,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-01-18 15:44:17,991 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:44:17,991 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:44:18,006 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Ended with exit code 0 [2022-01-18 15:44:18,191 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2022-01-18 15:44:18,191 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-01-18 15:44:18,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:44:18,192 INFO L85 PathProgramCache]: Analyzing trace with hash -872651225, now seen corresponding path program 27 times [2022-01-18 15:44:18,192 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:44:18,192 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1795409028] [2022-01-18 15:44:18,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:44:18,192 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:44:18,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:44:18,286 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:44:18,287 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:44:18,287 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1795409028] [2022-01-18 15:44:18,287 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1795409028] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:44:18,287 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [537381042] [2022-01-18 15:44:18,287 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 15:44:18,287 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:44:18,287 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:44:18,288 INFO L229 MonitoredProcess]: Starting monitored process 43 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:44:18,288 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2022-01-18 15:44:18,318 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-01-18 15:44:18,318 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:44:18,319 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2022-01-18 15:44:18,319 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:44:18,451 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:44:18,451 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2022-01-18 15:44:18,632 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:44:18,632 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:44:18,767 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:44:18,767 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [537381042] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:44:18,767 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:44:18,767 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 20 [2022-01-18 15:44:18,767 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1729231134] [2022-01-18 15:44:18,768 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:44:18,768 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 15:44:18,768 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:44:18,768 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 15:44:18,768 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=351, Unknown=0, NotChecked=0, Total=420 [2022-01-18 15:44:18,768 INFO L87 Difference]: Start difference. First operand 1921 states and 8488 transitions. Second operand has 21 states, 21 states have (on average 2.6666666666666665) internal successors, (56), 20 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 15:44:19,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:44:19,337 INFO L93 Difference]: Finished difference Result 2209 states and 9500 transitions. [2022-01-18 15:44:19,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-01-18 15:44:19,337 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.6666666666666665) internal successors, (56), 20 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 29 [2022-01-18 15:44:19,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:44:19,342 INFO L225 Difference]: With dead ends: 2209 [2022-01-18 15:44:19,342 INFO L226 Difference]: Without dead ends: 2181 [2022-01-18 15:44:19,342 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 44 SyntacticMatches, 3 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 198 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=156, Invalid=656, Unknown=0, NotChecked=0, Total=812 [2022-01-18 15:44:19,343 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 303 mSDsluCounter, 801 mSDsCounter, 0 mSdLazyCounter, 1134 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 303 SdHoareTripleChecker+Valid, 316 SdHoareTripleChecker+Invalid, 1153 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 1134 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 15:44:19,343 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [303 Valid, 316 Invalid, 1153 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 1134 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-18 15:44:19,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2181 states. [2022-01-18 15:44:19,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2181 to 1881. [2022-01-18 15:44:19,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1881 states, 1880 states have (on average 4.421808510638298) internal successors, (8313), 1880 states have internal predecessors, (8313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:44:19,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1881 states to 1881 states and 8313 transitions. [2022-01-18 15:44:19,369 INFO L78 Accepts]: Start accepts. Automaton has 1881 states and 8313 transitions. Word has length 29 [2022-01-18 15:44:19,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:44:19,369 INFO L470 AbstractCegarLoop]: Abstraction has 1881 states and 8313 transitions. [2022-01-18 15:44:19,369 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.6666666666666665) internal successors, (56), 20 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 15:44:19,369 INFO L276 IsEmpty]: Start isEmpty. Operand 1881 states and 8313 transitions. [2022-01-18 15:44:19,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-01-18 15:44:19,372 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:44:19,372 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:44:19,387 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 15:44:19,572 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46,43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:44:19,573 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-01-18 15:44:19,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:44:19,573 INFO L85 PathProgramCache]: Analyzing trace with hash -757329439, now seen corresponding path program 28 times [2022-01-18 15:44:19,573 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:44:19,573 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1612942409] [2022-01-18 15:44:19,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:44:19,573 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:44:19,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:44:19,669 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:44:19,669 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:44:19,669 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1612942409] [2022-01-18 15:44:19,669 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1612942409] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:44:19,669 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1513123766] [2022-01-18 15:44:19,669 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 15:44:19,669 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:44:19,670 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:44:19,670 INFO L229 MonitoredProcess]: Starting monitored process 44 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:44:19,672 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2022-01-18 15:44:19,707 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 15:44:19,707 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:44:19,708 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2022-01-18 15:44:19,709 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:44:19,847 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-01-18 15:44:19,969 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 15:44:19,970 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:44:20,084 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:44:20,085 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 22 [2022-01-18 15:44:20,093 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:44:20,094 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 7 [2022-01-18 15:44:20,154 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:44:20,154 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1513123766] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:44:20,154 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:44:20,155 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 21 [2022-01-18 15:44:20,155 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [625717136] [2022-01-18 15:44:20,155 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:44:20,155 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 15:44:20,155 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:44:20,155 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 15:44:20,155 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=401, Unknown=0, NotChecked=0, Total=462 [2022-01-18 15:44:20,155 INFO L87 Difference]: Start difference. First operand 1881 states and 8313 transitions. Second operand has 22 states, 22 states have (on average 3.5454545454545454) internal successors, (78), 21 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:44:21,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:44:21,181 INFO L93 Difference]: Finished difference Result 2425 states and 10268 transitions. [2022-01-18 15:44:21,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-01-18 15:44:21,182 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.5454545454545454) internal successors, (78), 21 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-01-18 15:44:21,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:44:21,188 INFO L225 Difference]: With dead ends: 2425 [2022-01-18 15:44:21,188 INFO L226 Difference]: Without dead ends: 2387 [2022-01-18 15:44:21,188 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 43 SyntacticMatches, 3 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 350 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=198, Invalid=1362, Unknown=0, NotChecked=0, Total=1560 [2022-01-18 15:44:21,188 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 384 mSDsluCounter, 1335 mSDsCounter, 0 mSdLazyCounter, 1734 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 384 SdHoareTripleChecker+Valid, 520 SdHoareTripleChecker+Invalid, 1786 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 1734 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 15:44:21,189 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [384 Valid, 520 Invalid, 1786 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 1734 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-18 15:44:21,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2387 states. [2022-01-18 15:44:21,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2387 to 1881. [2022-01-18 15:44:21,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1881 states, 1880 states have (on average 4.421808510638298) internal successors, (8313), 1880 states have internal predecessors, (8313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:44:21,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1881 states to 1881 states and 8313 transitions. [2022-01-18 15:44:21,218 INFO L78 Accepts]: Start accepts. Automaton has 1881 states and 8313 transitions. Word has length 29 [2022-01-18 15:44:21,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:44:21,218 INFO L470 AbstractCegarLoop]: Abstraction has 1881 states and 8313 transitions. [2022-01-18 15:44:21,218 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 3.5454545454545454) internal successors, (78), 21 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:44:21,219 INFO L276 IsEmpty]: Start isEmpty. Operand 1881 states and 8313 transitions. [2022-01-18 15:44:21,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-01-18 15:44:21,222 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:44:21,222 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:44:21,237 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Forceful destruction successful, exit code 0 [2022-01-18 15:44:21,437 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,SelfDestructingSolverStorable47 [2022-01-18 15:44:21,437 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-01-18 15:44:21,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:44:21,438 INFO L85 PathProgramCache]: Analyzing trace with hash -1692151869, now seen corresponding path program 29 times [2022-01-18 15:44:21,438 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:44:21,438 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1800188882] [2022-01-18 15:44:21,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:44:21,438 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:44:21,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:44:21,536 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:44:21,536 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:44:21,536 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1800188882] [2022-01-18 15:44:21,536 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1800188882] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:44:21,536 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [546743437] [2022-01-18 15:44:21,536 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 15:44:21,536 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:44:21,536 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:44:21,537 INFO L229 MonitoredProcess]: Starting monitored process 45 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:44:21,538 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2022-01-18 15:44:21,567 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 15:44:21,567 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:44:21,567 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 31 conjunts are in the unsatisfiable core [2022-01-18 15:44:21,568 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:44:21,702 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 7 [2022-01-18 15:44:21,838 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:44:21,838 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:44:21,943 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:44:21,944 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 22 [2022-01-18 15:44:21,962 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:44:21,962 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 7 [2022-01-18 15:44:22,028 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:44:22,028 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [546743437] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:44:22,029 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:44:22,029 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8] total 20 [2022-01-18 15:44:22,029 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1686390737] [2022-01-18 15:44:22,029 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:44:22,029 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 15:44:22,029 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:44:22,029 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 15:44:22,030 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=351, Unknown=0, NotChecked=0, Total=420 [2022-01-18 15:44:22,030 INFO L87 Difference]: Start difference. First operand 1881 states and 8313 transitions. Second operand has 21 states, 21 states have (on average 3.5238095238095237) internal successors, (74), 20 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:44:22,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:44:22,876 INFO L93 Difference]: Finished difference Result 2447 states and 10393 transitions. [2022-01-18 15:44:22,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-01-18 15:44:22,876 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.5238095238095237) internal successors, (74), 20 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-01-18 15:44:22,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:44:22,881 INFO L225 Difference]: With dead ends: 2447 [2022-01-18 15:44:22,881 INFO L226 Difference]: Without dead ends: 2425 [2022-01-18 15:44:22,882 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 44 SyntacticMatches, 3 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 277 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=200, Invalid=1060, Unknown=0, NotChecked=0, Total=1260 [2022-01-18 15:44:22,882 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 345 mSDsluCounter, 1117 mSDsCounter, 0 mSdLazyCounter, 1505 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 345 SdHoareTripleChecker+Valid, 438 SdHoareTripleChecker+Invalid, 1551 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 1505 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 15:44:22,882 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [345 Valid, 438 Invalid, 1551 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 1505 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-18 15:44:22,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2425 states. [2022-01-18 15:44:22,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2425 to 1869. [2022-01-18 15:44:22,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1869 states, 1868 states have (on average 4.423982869379015) internal successors, (8264), 1868 states have internal predecessors, (8264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:44:22,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1869 states to 1869 states and 8264 transitions. [2022-01-18 15:44:22,910 INFO L78 Accepts]: Start accepts. Automaton has 1869 states and 8264 transitions. Word has length 29 [2022-01-18 15:44:22,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:44:22,910 INFO L470 AbstractCegarLoop]: Abstraction has 1869 states and 8264 transitions. [2022-01-18 15:44:22,910 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.5238095238095237) internal successors, (74), 20 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:44:22,910 INFO L276 IsEmpty]: Start isEmpty. Operand 1869 states and 8264 transitions. [2022-01-18 15:44:22,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-01-18 15:44:22,913 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:44:22,913 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:44:22,929 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Ended with exit code 0 [2022-01-18 15:44:23,113 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,SelfDestructingSolverStorable48 [2022-01-18 15:44:23,114 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-01-18 15:44:23,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:44:23,114 INFO L85 PathProgramCache]: Analyzing trace with hash -285338559, now seen corresponding path program 15 times [2022-01-18 15:44:23,114 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:44:23,114 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [404570003] [2022-01-18 15:44:23,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:44:23,114 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:44:23,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:44:23,212 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:44:23,212 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:44:23,212 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [404570003] [2022-01-18 15:44:23,212 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [404570003] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:44:23,212 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [997962135] [2022-01-18 15:44:23,212 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 15:44:23,212 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:44:23,212 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:44:23,213 INFO L229 MonitoredProcess]: Starting monitored process 46 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:44:23,213 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2022-01-18 15:44:23,243 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-01-18 15:44:23,243 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:44:23,244 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2022-01-18 15:44:23,244 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:44:23,372 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:44:23,372 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-18 15:44:23,550 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:44:23,550 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:44:23,674 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:44:23,675 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [997962135] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:44:23,675 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:44:23,675 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 19 [2022-01-18 15:44:23,675 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [537094718] [2022-01-18 15:44:23,675 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:44:23,675 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 15:44:23,675 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:44:23,675 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 15:44:23,675 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=319, Unknown=0, NotChecked=0, Total=380 [2022-01-18 15:44:23,675 INFO L87 Difference]: Start difference. First operand 1869 states and 8264 transitions. Second operand has 20 states, 20 states have (on average 2.8) internal successors, (56), 19 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 15:44:24,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:44:24,284 INFO L93 Difference]: Finished difference Result 2494 states and 10689 transitions. [2022-01-18 15:44:24,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-01-18 15:44:24,285 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.8) internal successors, (56), 19 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 29 [2022-01-18 15:44:24,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:44:24,290 INFO L225 Difference]: With dead ends: 2494 [2022-01-18 15:44:24,290 INFO L226 Difference]: Without dead ends: 2475 [2022-01-18 15:44:24,290 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 45 SyntacticMatches, 3 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 213 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=149, Invalid=663, Unknown=0, NotChecked=0, Total=812 [2022-01-18 15:44:24,291 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 357 mSDsluCounter, 943 mSDsCounter, 0 mSdLazyCounter, 1292 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 357 SdHoareTripleChecker+Valid, 360 SdHoareTripleChecker+Invalid, 1308 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 1292 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 15:44:24,291 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [357 Valid, 360 Invalid, 1308 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 1292 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-18 15:44:24,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2475 states. [2022-01-18 15:44:24,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2475 to 1968. [2022-01-18 15:44:24,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1968 states, 1967 states have (on average 4.427046263345196) internal successors, (8708), 1967 states have internal predecessors, (8708), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:44:24,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1968 states to 1968 states and 8708 transitions. [2022-01-18 15:44:24,319 INFO L78 Accepts]: Start accepts. Automaton has 1968 states and 8708 transitions. Word has length 29 [2022-01-18 15:44:24,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:44:24,319 INFO L470 AbstractCegarLoop]: Abstraction has 1968 states and 8708 transitions. [2022-01-18 15:44:24,319 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.8) internal successors, (56), 19 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 15:44:24,319 INFO L276 IsEmpty]: Start isEmpty. Operand 1968 states and 8708 transitions. [2022-01-18 15:44:24,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-01-18 15:44:24,322 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:44:24,322 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:44:24,338 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Ended with exit code 0 [2022-01-18 15:44:24,522 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,SelfDestructingSolverStorable49 [2022-01-18 15:44:24,522 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-01-18 15:44:24,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:44:24,523 INFO L85 PathProgramCache]: Analyzing trace with hash 1137016267, now seen corresponding path program 16 times [2022-01-18 15:44:24,523 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:44:24,523 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [595665580] [2022-01-18 15:44:24,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:44:24,523 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:44:24,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:44:24,600 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:44:24,600 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:44:24,600 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [595665580] [2022-01-18 15:44:24,600 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [595665580] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:44:24,601 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1212590419] [2022-01-18 15:44:24,601 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 15:44:24,601 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:44:24,601 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:44:24,602 INFO L229 MonitoredProcess]: Starting monitored process 47 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:44:24,602 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2022-01-18 15:44:24,637 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 15:44:24,637 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:44:24,639 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2022-01-18 15:44:24,639 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:44:24,780 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2022-01-18 15:44:24,874 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:44:24,874 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:44:24,981 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:44:24,981 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 22 [2022-01-18 15:44:24,991 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:44:24,992 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 7 [2022-01-18 15:44:25,042 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:44:25,042 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1212590419] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:44:25,042 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:44:25,042 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 19 [2022-01-18 15:44:25,042 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1646846821] [2022-01-18 15:44:25,042 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:44:25,043 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 15:44:25,043 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:44:25,043 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 15:44:25,043 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=317, Unknown=0, NotChecked=0, Total=380 [2022-01-18 15:44:25,043 INFO L87 Difference]: Start difference. First operand 1968 states and 8708 transitions. Second operand has 20 states, 20 states have (on average 3.7) internal successors, (74), 19 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:44:25,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:44:25,793 INFO L93 Difference]: Finished difference Result 3178 states and 13290 transitions. [2022-01-18 15:44:25,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-01-18 15:44:25,793 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.7) internal successors, (74), 19 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-01-18 15:44:25,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:44:25,800 INFO L225 Difference]: With dead ends: 3178 [2022-01-18 15:44:25,800 INFO L226 Difference]: Without dead ends: 3150 [2022-01-18 15:44:25,801 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 45 SyntacticMatches, 3 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 243 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=172, Invalid=884, Unknown=0, NotChecked=0, Total=1056 [2022-01-18 15:44:25,801 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 498 mSDsluCounter, 1161 mSDsCounter, 0 mSdLazyCounter, 1541 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 498 SdHoareTripleChecker+Valid, 466 SdHoareTripleChecker+Invalid, 1603 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 1541 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 15:44:25,801 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [498 Valid, 466 Invalid, 1603 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 1541 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-18 15:44:25,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3150 states. [2022-01-18 15:44:25,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3150 to 2117. [2022-01-18 15:44:25,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2117 states, 2116 states have (on average 4.453213610586011) internal successors, (9423), 2116 states have internal predecessors, (9423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:44:25,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2117 states to 2117 states and 9423 transitions. [2022-01-18 15:44:25,840 INFO L78 Accepts]: Start accepts. Automaton has 2117 states and 9423 transitions. Word has length 29 [2022-01-18 15:44:25,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:44:25,840 INFO L470 AbstractCegarLoop]: Abstraction has 2117 states and 9423 transitions. [2022-01-18 15:44:25,840 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.7) internal successors, (74), 19 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:44:25,840 INFO L276 IsEmpty]: Start isEmpty. Operand 2117 states and 9423 transitions. [2022-01-18 15:44:25,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-01-18 15:44:25,843 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:44:25,843 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:44:25,859 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Forceful destruction successful, exit code 0 [2022-01-18 15:44:26,043 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,47 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:44:26,044 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-01-18 15:44:26,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:44:26,044 INFO L85 PathProgramCache]: Analyzing trace with hash 1537889799, now seen corresponding path program 17 times [2022-01-18 15:44:26,044 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:44:26,044 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [87641522] [2022-01-18 15:44:26,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:44:26,044 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:44:26,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:44:26,167 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:44:26,167 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:44:26,167 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [87641522] [2022-01-18 15:44:26,167 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [87641522] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:44:26,167 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1225876252] [2022-01-18 15:44:26,167 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 15:44:26,167 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:44:26,168 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:44:26,184 INFO L229 MonitoredProcess]: Starting monitored process 48 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:44:26,185 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2022-01-18 15:44:26,218 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:44:26,218 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:44:26,218 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2022-01-18 15:44:26,219 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:44:26,359 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2022-01-18 15:44:26,452 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:44:26,452 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:44:26,560 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:44:26,560 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 22 [2022-01-18 15:44:26,569 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:44:26,569 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 7 [2022-01-18 15:44:26,615 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:44:26,615 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1225876252] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:44:26,615 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:44:26,615 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 19 [2022-01-18 15:44:26,615 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2047787563] [2022-01-18 15:44:26,615 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:44:26,615 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 15:44:26,615 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:44:26,615 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 15:44:26,615 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=317, Unknown=0, NotChecked=0, Total=380 [2022-01-18 15:44:26,616 INFO L87 Difference]: Start difference. First operand 2117 states and 9423 transitions. Second operand has 20 states, 20 states have (on average 3.65) internal successors, (73), 19 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:44:27,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:44:27,336 INFO L93 Difference]: Finished difference Result 3185 states and 13307 transitions. [2022-01-18 15:44:27,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-01-18 15:44:27,336 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.65) internal successors, (73), 19 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-01-18 15:44:27,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:44:27,343 INFO L225 Difference]: With dead ends: 3185 [2022-01-18 15:44:27,343 INFO L226 Difference]: Without dead ends: 3152 [2022-01-18 15:44:27,344 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 45 SyntacticMatches, 3 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 241 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=176, Invalid=880, Unknown=0, NotChecked=0, Total=1056 [2022-01-18 15:44:27,344 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 501 mSDsluCounter, 1064 mSDsCounter, 0 mSdLazyCounter, 1421 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 501 SdHoareTripleChecker+Valid, 431 SdHoareTripleChecker+Invalid, 1487 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 1421 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 15:44:27,344 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [501 Valid, 431 Invalid, 1487 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 1421 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-18 15:44:27,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3152 states. [2022-01-18 15:44:27,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3152 to 2007. [2022-01-18 15:44:27,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2007 states, 2006 states have (on average 4.436689930209372) internal successors, (8900), 2006 states have internal predecessors, (8900), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:44:27,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2007 states to 2007 states and 8900 transitions. [2022-01-18 15:44:27,379 INFO L78 Accepts]: Start accepts. Automaton has 2007 states and 8900 transitions. Word has length 29 [2022-01-18 15:44:27,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:44:27,380 INFO L470 AbstractCegarLoop]: Abstraction has 2007 states and 8900 transitions. [2022-01-18 15:44:27,380 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.65) internal successors, (73), 19 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:44:27,380 INFO L276 IsEmpty]: Start isEmpty. Operand 2007 states and 8900 transitions. [2022-01-18 15:44:27,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-01-18 15:44:27,383 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:44:27,383 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:44:27,398 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Ended with exit code 0 [2022-01-18 15:44:27,583 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,48 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:44:27,584 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-01-18 15:44:27,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:44:27,584 INFO L85 PathProgramCache]: Analyzing trace with hash 1175894491, now seen corresponding path program 18 times [2022-01-18 15:44:27,584 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:44:27,584 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [394084326] [2022-01-18 15:44:27,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:44:27,584 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:44:27,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:44:27,674 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:44:27,674 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:44:27,674 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [394084326] [2022-01-18 15:44:27,674 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [394084326] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:44:27,674 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [269035035] [2022-01-18 15:44:27,674 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 15:44:27,674 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:44:27,675 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:44:27,675 INFO L229 MonitoredProcess]: Starting monitored process 49 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:44:27,676 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2022-01-18 15:44:27,705 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-01-18 15:44:27,705 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:44:27,705 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2022-01-18 15:44:27,706 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:44:27,839 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:44:27,839 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-18 15:44:28,023 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:44:28,024 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:44:28,159 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:44:28,159 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [269035035] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:44:28,159 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:44:28,159 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 19 [2022-01-18 15:44:28,159 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1496898799] [2022-01-18 15:44:28,159 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:44:28,159 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 15:44:28,159 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:44:28,160 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 15:44:28,160 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=329, Unknown=0, NotChecked=0, Total=380 [2022-01-18 15:44:28,160 INFO L87 Difference]: Start difference. First operand 2007 states and 8900 transitions. Second operand has 20 states, 20 states have (on average 2.75) 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 15:44:28,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:44:28,669 INFO L93 Difference]: Finished difference Result 2343 states and 10168 transitions. [2022-01-18 15:44:28,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-18 15:44:28,669 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.75) 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 29 [2022-01-18 15:44:28,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:44:28,675 INFO L225 Difference]: With dead ends: 2343 [2022-01-18 15:44:28,675 INFO L226 Difference]: Without dead ends: 2328 [2022-01-18 15:44:28,675 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 45 SyntacticMatches, 3 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=99, Invalid=551, Unknown=0, NotChecked=0, Total=650 [2022-01-18 15:44:28,675 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 160 mSDsluCounter, 806 mSDsCounter, 0 mSdLazyCounter, 1127 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 160 SdHoareTripleChecker+Valid, 333 SdHoareTripleChecker+Invalid, 1130 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 1127 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 15:44:28,676 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [160 Valid, 333 Invalid, 1130 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 1127 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-18 15:44:28,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2328 states. [2022-01-18 15:44:28,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2328 to 1989. [2022-01-18 15:44:28,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1989 states, 1988 states have (on average 4.437625754527163) internal successors, (8822), 1988 states have internal predecessors, (8822), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:44:28,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1989 states to 1989 states and 8822 transitions. [2022-01-18 15:44:28,719 INFO L78 Accepts]: Start accepts. Automaton has 1989 states and 8822 transitions. Word has length 29 [2022-01-18 15:44:28,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:44:28,719 INFO L470 AbstractCegarLoop]: Abstraction has 1989 states and 8822 transitions. [2022-01-18 15:44:28,719 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.75) 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 15:44:28,719 INFO L276 IsEmpty]: Start isEmpty. Operand 1989 states and 8822 transitions. [2022-01-18 15:44:28,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-01-18 15:44:28,722 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:44:28,723 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:44:28,738 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Forceful destruction successful, exit code 0 [2022-01-18 15:44:28,927 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,49 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:44:28,927 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-01-18 15:44:28,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:44:28,928 INFO L85 PathProgramCache]: Analyzing trace with hash 1539061893, now seen corresponding path program 19 times [2022-01-18 15:44:28,928 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:44:28,928 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1440679336] [2022-01-18 15:44:28,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:44:28,928 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:44:28,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:44:29,014 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:44:29,016 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:44:29,016 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1440679336] [2022-01-18 15:44:29,016 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1440679336] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:44:29,016 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1341493841] [2022-01-18 15:44:29,016 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 15:44:29,016 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:44:29,017 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:44:29,017 INFO L229 MonitoredProcess]: Starting monitored process 50 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:44:29,018 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2022-01-18 15:44:29,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:44:29,047 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2022-01-18 15:44:29,047 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:44:29,262 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2022-01-18 15:44:29,319 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:44:29,319 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:44:29,451 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:44:29,451 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 22 [2022-01-18 15:44:29,460 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:44:29,460 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 7 [2022-01-18 15:44:29,511 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:44:29,511 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1341493841] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:44:29,511 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:44:29,511 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 21 [2022-01-18 15:44:29,511 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1146671421] [2022-01-18 15:44:29,511 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:44:29,511 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 15:44:29,511 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:44:29,511 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 15:44:29,511 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=407, Unknown=0, NotChecked=0, Total=462 [2022-01-18 15:44:29,511 INFO L87 Difference]: Start difference. First operand 1989 states and 8822 transitions. Second operand has 22 states, 22 states have (on average 3.4545454545454546) internal successors, (76), 21 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:44:30,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:44:30,435 INFO L93 Difference]: Finished difference Result 2370 states and 10258 transitions. [2022-01-18 15:44:30,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-01-18 15:44:30,436 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.4545454545454546) internal successors, (76), 21 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-01-18 15:44:30,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:44:30,441 INFO L225 Difference]: With dead ends: 2370 [2022-01-18 15:44:30,441 INFO L226 Difference]: Without dead ends: 2355 [2022-01-18 15:44:30,441 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 43 SyntacticMatches, 3 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 264 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=184, Invalid=1222, Unknown=0, NotChecked=0, Total=1406 [2022-01-18 15:44:30,441 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 294 mSDsluCounter, 1211 mSDsCounter, 0 mSdLazyCounter, 1664 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 294 SdHoareTripleChecker+Valid, 482 SdHoareTripleChecker+Invalid, 1711 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 1664 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 15:44:30,441 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [294 Valid, 482 Invalid, 1711 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 1664 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-18 15:44:30,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2355 states. [2022-01-18 15:44:30,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2355 to 1989. [2022-01-18 15:44:30,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1989 states, 1988 states have (on average 4.437625754527163) internal successors, (8822), 1988 states have internal predecessors, (8822), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:44:30,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1989 states to 1989 states and 8822 transitions. [2022-01-18 15:44:30,470 INFO L78 Accepts]: Start accepts. Automaton has 1989 states and 8822 transitions. Word has length 29 [2022-01-18 15:44:30,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:44:30,470 INFO L470 AbstractCegarLoop]: Abstraction has 1989 states and 8822 transitions. [2022-01-18 15:44:30,470 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 3.4545454545454546) internal successors, (76), 21 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:44:30,470 INFO L276 IsEmpty]: Start isEmpty. Operand 1989 states and 8822 transitions. [2022-01-18 15:44:30,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-01-18 15:44:30,473 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:44:30,473 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:44:30,492 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Forceful destruction successful, exit code 0 [2022-01-18 15:44:30,673 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,SelfDestructingSolverStorable53 [2022-01-18 15:44:30,673 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-01-18 15:44:30,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:44:30,674 INFO L85 PathProgramCache]: Analyzing trace with hash 1973091239, now seen corresponding path program 20 times [2022-01-18 15:44:30,674 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:44:30,674 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1824689026] [2022-01-18 15:44:30,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:44:30,674 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:44:30,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:44:30,765 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:44:30,766 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:44:30,766 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1824689026] [2022-01-18 15:44:30,766 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1824689026] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:44:30,766 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [15433579] [2022-01-18 15:44:30,766 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 15:44:30,766 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:44:30,766 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:44:30,767 INFO L229 MonitoredProcess]: Starting monitored process 51 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:44:30,768 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2022-01-18 15:44:30,796 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:44:30,796 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:44:30,797 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2022-01-18 15:44:30,797 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:44:30,982 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:44:30,982 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-18 15:44:31,108 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:44:31,108 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:44:31,283 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:44:31,283 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [15433579] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:44:31,283 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:44:31,284 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 21 [2022-01-18 15:44:31,284 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1445846509] [2022-01-18 15:44:31,284 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:44:31,284 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 15:44:31,284 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:44:31,284 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 15:44:31,284 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=402, Unknown=0, NotChecked=0, Total=462 [2022-01-18 15:44:31,284 INFO L87 Difference]: Start difference. First operand 1989 states and 8822 transitions. Second operand has 22 states, 22 states have (on average 2.8181818181818183) internal successors, (62), 21 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:44:31,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:44:31,960 INFO L93 Difference]: Finished difference Result 2428 states and 10312 transitions. [2022-01-18 15:44:31,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-01-18 15:44:31,960 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.8181818181818183) internal successors, (62), 21 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 29 [2022-01-18 15:44:31,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:44:31,965 INFO L225 Difference]: With dead ends: 2428 [2022-01-18 15:44:31,966 INFO L226 Difference]: Without dead ends: 2413 [2022-01-18 15:44:31,966 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 43 SyntacticMatches, 3 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 226 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=149, Invalid=843, Unknown=0, NotChecked=0, Total=992 [2022-01-18 15:44:31,966 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 246 mSDsluCounter, 953 mSDsCounter, 0 mSdLazyCounter, 1246 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 246 SdHoareTripleChecker+Valid, 393 SdHoareTripleChecker+Invalid, 1270 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 1246 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 15:44:31,966 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [246 Valid, 393 Invalid, 1270 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 1246 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-18 15:44:31,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2413 states. [2022-01-18 15:44:31,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2413 to 1962. [2022-01-18 15:44:31,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1962 states, 1961 states have (on average 4.448750637429883) internal successors, (8724), 1961 states have internal predecessors, (8724), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:44:31,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1962 states to 1962 states and 8724 transitions. [2022-01-18 15:44:31,997 INFO L78 Accepts]: Start accepts. Automaton has 1962 states and 8724 transitions. Word has length 29 [2022-01-18 15:44:31,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:44:31,997 INFO L470 AbstractCegarLoop]: Abstraction has 1962 states and 8724 transitions. [2022-01-18 15:44:31,997 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.8181818181818183) internal successors, (62), 21 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:44:31,997 INFO L276 IsEmpty]: Start isEmpty. Operand 1962 states and 8724 transitions. [2022-01-18 15:44:32,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-01-18 15:44:32,000 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:44:32,000 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:44:32,015 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Ended with exit code 0 [2022-01-18 15:44:32,207 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,SelfDestructingSolverStorable54 [2022-01-18 15:44:32,207 INFO L402 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-01-18 15:44:32,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:44:32,207 INFO L85 PathProgramCache]: Analyzing trace with hash 2139067589, now seen corresponding path program 21 times [2022-01-18 15:44:32,208 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:44:32,208 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1879166491] [2022-01-18 15:44:32,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:44:32,208 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:44:32,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:44:32,308 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:44:32,308 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:44:32,308 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1879166491] [2022-01-18 15:44:32,309 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1879166491] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:44:32,309 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1180559243] [2022-01-18 15:44:32,309 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 15:44:32,309 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:44:32,309 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:44:32,310 INFO L229 MonitoredProcess]: Starting monitored process 52 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:44:32,310 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2022-01-18 15:44:32,341 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-01-18 15:44:32,341 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:44:32,342 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2022-01-18 15:44:32,342 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:44:32,445 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:44:32,446 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2022-01-18 15:44:32,647 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:44:32,647 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:44:32,789 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:44:32,790 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1180559243] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:44:32,790 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:44:32,790 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 20 [2022-01-18 15:44:32,790 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [178840142] [2022-01-18 15:44:32,790 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:44:32,790 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 15:44:32,790 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:44:32,790 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 15:44:32,790 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=349, Unknown=0, NotChecked=0, Total=420 [2022-01-18 15:44:32,791 INFO L87 Difference]: Start difference. First operand 1962 states and 8724 transitions. Second operand has 21 states, 21 states have (on average 2.7142857142857144) 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 15:44:33,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:44:33,388 INFO L93 Difference]: Finished difference Result 2348 states and 10185 transitions. [2022-01-18 15:44:33,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-01-18 15:44:33,389 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.7142857142857144) 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 29 [2022-01-18 15:44:33,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:44:33,394 INFO L225 Difference]: With dead ends: 2348 [2022-01-18 15:44:33,394 INFO L226 Difference]: Without dead ends: 2329 [2022-01-18 15:44:33,394 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 44 SyntacticMatches, 3 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 229 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=178, Invalid=692, Unknown=0, NotChecked=0, Total=870 [2022-01-18 15:44:33,394 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 281 mSDsluCounter, 858 mSDsCounter, 0 mSdLazyCounter, 1197 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 281 SdHoareTripleChecker+Valid, 333 SdHoareTripleChecker+Invalid, 1215 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 1197 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 15:44:33,394 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [281 Valid, 333 Invalid, 1215 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 1197 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-18 15:44:33,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2329 states. [2022-01-18 15:44:33,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2329 to 1998. [2022-01-18 15:44:33,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1998 states, 1997 states have (on average 4.451176765147721) internal successors, (8889), 1997 states have internal predecessors, (8889), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:44:33,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1998 states to 1998 states and 8889 transitions. [2022-01-18 15:44:33,422 INFO L78 Accepts]: Start accepts. Automaton has 1998 states and 8889 transitions. Word has length 29 [2022-01-18 15:44:33,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:44:33,422 INFO L470 AbstractCegarLoop]: Abstraction has 1998 states and 8889 transitions. [2022-01-18 15:44:33,423 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.7142857142857144) 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 15:44:33,423 INFO L276 IsEmpty]: Start isEmpty. Operand 1998 states and 8889 transitions. [2022-01-18 15:44:33,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-01-18 15:44:33,426 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:44:33,426 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:44:33,443 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 15:44:33,626 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2022-01-18 15:44:33,626 INFO L402 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-01-18 15:44:33,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:44:33,626 INFO L85 PathProgramCache]: Analyzing trace with hash -733544881, now seen corresponding path program 22 times [2022-01-18 15:44:33,627 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:44:33,627 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1164626393] [2022-01-18 15:44:33,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:44:33,627 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:44:33,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:44:33,726 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:44:33,726 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:44:33,726 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1164626393] [2022-01-18 15:44:33,726 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1164626393] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:44:33,726 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [854253520] [2022-01-18 15:44:33,726 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 15:44:33,726 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:44:33,726 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:44:33,727 INFO L229 MonitoredProcess]: Starting monitored process 53 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:44:33,728 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2022-01-18 15:44:33,755 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 15:44:33,756 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:44:33,756 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2022-01-18 15:44:33,757 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:44:33,871 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-01-18 15:44:33,989 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:44:33,989 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:44:34,100 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:44:34,100 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 22 [2022-01-18 15:44:34,110 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:44:34,110 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 7 [2022-01-18 15:44:34,155 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:44:34,156 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [854253520] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:44:34,156 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:44:34,156 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 19 [2022-01-18 15:44:34,156 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [200913758] [2022-01-18 15:44:34,156 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:44:34,156 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 15:44:34,156 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:44:34,156 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 15:44:34,156 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=311, Unknown=0, NotChecked=0, Total=380 [2022-01-18 15:44:34,156 INFO L87 Difference]: Start difference. First operand 1998 states and 8889 transitions. Second operand has 20 states, 20 states have (on average 3.7) internal successors, (74), 19 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:44:34,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:44:34,846 INFO L93 Difference]: Finished difference Result 2888 states and 12212 transitions. [2022-01-18 15:44:34,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-01-18 15:44:34,846 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.7) internal successors, (74), 19 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-01-18 15:44:34,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:44:34,853 INFO L225 Difference]: With dead ends: 2888 [2022-01-18 15:44:34,853 INFO L226 Difference]: Without dead ends: 2860 [2022-01-18 15:44:34,853 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 45 SyntacticMatches, 3 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 236 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=189, Invalid=803, Unknown=0, NotChecked=0, Total=992 [2022-01-18 15:44:34,853 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 337 mSDsluCounter, 1086 mSDsCounter, 0 mSdLazyCounter, 1395 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 337 SdHoareTripleChecker+Valid, 422 SdHoareTripleChecker+Invalid, 1425 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 1395 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 15:44:34,853 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [337 Valid, 422 Invalid, 1425 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 1395 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-18 15:44:34,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2860 states. [2022-01-18 15:44:34,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2860 to 2123. [2022-01-18 15:44:34,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2123 states, 2122 states have (on average 4.463242224316683) internal successors, (9471), 2122 states have internal predecessors, (9471), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:44:34,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2123 states to 2123 states and 9471 transitions. [2022-01-18 15:44:34,889 INFO L78 Accepts]: Start accepts. Automaton has 2123 states and 9471 transitions. Word has length 29 [2022-01-18 15:44:34,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:44:34,889 INFO L470 AbstractCegarLoop]: Abstraction has 2123 states and 9471 transitions. [2022-01-18 15:44:34,889 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.7) internal successors, (74), 19 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:44:34,889 INFO L276 IsEmpty]: Start isEmpty. Operand 2123 states and 9471 transitions. [2022-01-18 15:44:34,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-01-18 15:44:34,892 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:44:34,892 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:44:34,908 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Forceful destruction successful, exit code 0 [2022-01-18 15:44:35,093 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,SelfDestructingSolverStorable56 [2022-01-18 15:44:35,093 INFO L402 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-01-18 15:44:35,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:44:35,093 INFO L85 PathProgramCache]: Analyzing trace with hash -332671349, now seen corresponding path program 23 times [2022-01-18 15:44:35,093 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:44:35,093 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1243204044] [2022-01-18 15:44:35,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:44:35,093 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:44:35,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:44:35,180 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:44:35,180 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:44:35,180 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1243204044] [2022-01-18 15:44:35,181 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1243204044] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:44:35,181 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1255405994] [2022-01-18 15:44:35,181 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 15:44:35,181 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:44:35,181 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:44:35,182 INFO L229 MonitoredProcess]: Starting monitored process 54 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:44:35,183 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2022-01-18 15:44:35,211 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:44:35,212 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:44:35,212 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2022-01-18 15:44:35,213 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:44:35,328 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-01-18 15:44:35,459 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:44:35,459 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:44:35,570 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:44:35,570 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 22 [2022-01-18 15:44:35,579 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:44:35,580 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 7 [2022-01-18 15:44:35,632 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:44:35,632 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1255405994] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:44:35,632 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:44:35,632 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 19 [2022-01-18 15:44:35,632 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [389655013] [2022-01-18 15:44:35,632 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:44:35,632 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 15:44:35,632 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:44:35,632 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 15:44:35,633 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=311, Unknown=0, NotChecked=0, Total=380 [2022-01-18 15:44:35,633 INFO L87 Difference]: Start difference. First operand 2123 states and 9471 transitions. Second operand has 20 states, 20 states have (on average 3.65) internal successors, (73), 19 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:44:36,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:44:36,336 INFO L93 Difference]: Finished difference Result 2895 states and 12229 transitions. [2022-01-18 15:44:36,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-01-18 15:44:36,336 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.65) internal successors, (73), 19 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-01-18 15:44:36,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:44:36,343 INFO L225 Difference]: With dead ends: 2895 [2022-01-18 15:44:36,343 INFO L226 Difference]: Without dead ends: 2862 [2022-01-18 15:44:36,343 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 45 SyntacticMatches, 3 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 253 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=202, Invalid=854, Unknown=0, NotChecked=0, Total=1056 [2022-01-18 15:44:36,343 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 335 mSDsluCounter, 982 mSDsCounter, 0 mSdLazyCounter, 1281 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 335 SdHoareTripleChecker+Valid, 388 SdHoareTripleChecker+Invalid, 1310 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 1281 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 15:44:36,343 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [335 Valid, 388 Invalid, 1310 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 1281 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-18 15:44:36,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2862 states. [2022-01-18 15:44:36,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2862 to 2028. [2022-01-18 15:44:36,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2028 states, 2027 states have (on average 4.461272816970893) internal successors, (9043), 2027 states have internal predecessors, (9043), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:44:36,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2028 states to 2028 states and 9043 transitions. [2022-01-18 15:44:36,378 INFO L78 Accepts]: Start accepts. Automaton has 2028 states and 9043 transitions. Word has length 29 [2022-01-18 15:44:36,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:44:36,378 INFO L470 AbstractCegarLoop]: Abstraction has 2028 states and 9043 transitions. [2022-01-18 15:44:36,378 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.65) internal successors, (73), 19 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:44:36,378 INFO L276 IsEmpty]: Start isEmpty. Operand 2028 states and 9043 transitions. [2022-01-18 15:44:36,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-01-18 15:44:36,381 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:44:36,381 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:44:36,399 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 15:44:36,581 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,SelfDestructingSolverStorable57 [2022-01-18 15:44:36,582 INFO L402 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-01-18 15:44:36,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:44:36,582 INFO L85 PathProgramCache]: Analyzing trace with hash -694666657, now seen corresponding path program 24 times [2022-01-18 15:44:36,582 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:44:36,582 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2117880568] [2022-01-18 15:44:36,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:44:36,582 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:44:36,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:44:36,697 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:44:36,698 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:44:36,698 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2117880568] [2022-01-18 15:44:36,698 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2117880568] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:44:36,698 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1560437525] [2022-01-18 15:44:36,698 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 15:44:36,698 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:44:36,698 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:44:36,699 INFO L229 MonitoredProcess]: Starting monitored process 55 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:44:36,700 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2022-01-18 15:44:36,728 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-01-18 15:44:36,728 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:44:36,728 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2022-01-18 15:44:36,729 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:44:36,829 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:44:36,829 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2022-01-18 15:44:37,073 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:44:37,074 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:44:37,224 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:44:37,224 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1560437525] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:44:37,224 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:44:37,224 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 20 [2022-01-18 15:44:37,224 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [438794030] [2022-01-18 15:44:37,224 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:44:37,224 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 15:44:37,224 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:44:37,225 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 15:44:37,225 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=364, Unknown=0, NotChecked=0, Total=420 [2022-01-18 15:44:37,225 INFO L87 Difference]: Start difference. First operand 2028 states and 9043 transitions. Second operand has 21 states, 21 states have (on average 2.6666666666666665) internal successors, (56), 20 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 15:44:37,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:44:37,770 INFO L93 Difference]: Finished difference Result 2182 states and 9610 transitions. [2022-01-18 15:44:37,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-18 15:44:37,771 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.6666666666666665) internal successors, (56), 20 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 29 [2022-01-18 15:44:37,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:44:37,775 INFO L225 Difference]: With dead ends: 2182 [2022-01-18 15:44:37,775 INFO L226 Difference]: Without dead ends: 2167 [2022-01-18 15:44:37,776 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 44 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=102, Invalid=600, Unknown=0, NotChecked=0, Total=702 [2022-01-18 15:44:37,776 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 100 mSDsluCounter, 941 mSDsCounter, 0 mSdLazyCounter, 1324 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 387 SdHoareTripleChecker+Invalid, 1327 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 1324 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 15:44:37,776 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [100 Valid, 387 Invalid, 1327 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 1324 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-18 15:44:37,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2167 states. [2022-01-18 15:44:37,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2167 to 2007. [2022-01-18 15:44:37,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2007 states, 2006 states have (on average 4.464107676969093) internal successors, (8955), 2006 states have internal predecessors, (8955), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:44:37,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2007 states to 2007 states and 8955 transitions. [2022-01-18 15:44:37,803 INFO L78 Accepts]: Start accepts. Automaton has 2007 states and 8955 transitions. Word has length 29 [2022-01-18 15:44:37,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:44:37,804 INFO L470 AbstractCegarLoop]: Abstraction has 2007 states and 8955 transitions. [2022-01-18 15:44:37,804 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.6666666666666665) internal successors, (56), 20 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 15:44:37,804 INFO L276 IsEmpty]: Start isEmpty. Operand 2007 states and 8955 transitions. [2022-01-18 15:44:37,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-01-18 15:44:37,807 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:44:37,807 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:44:37,822 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Forceful destruction successful, exit code 0 [2022-01-18 15:44:38,007 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2022-01-18 15:44:38,007 INFO L402 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-01-18 15:44:38,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:44:38,007 INFO L85 PathProgramCache]: Analyzing trace with hash -2058717311, now seen corresponding path program 25 times [2022-01-18 15:44:38,008 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:44:38,008 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [845661329] [2022-01-18 15:44:38,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:44:38,008 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:44:38,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:44:38,107 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:44:38,107 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:44:38,107 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [845661329] [2022-01-18 15:44:38,107 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [845661329] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:44:38,108 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1788795589] [2022-01-18 15:44:38,108 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 15:44:38,108 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:44:38,108 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:44:38,108 INFO L229 MonitoredProcess]: Starting monitored process 56 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:44:38,109 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2022-01-18 15:44:38,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:44:38,140 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2022-01-18 15:44:38,140 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:44:38,262 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-01-18 15:44:38,378 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:44:38,378 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:44:38,483 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:44:38,483 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 22 [2022-01-18 15:44:38,492 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:44:38,493 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 7 [2022-01-18 15:44:38,541 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:44:38,542 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1788795589] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:44:38,542 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:44:38,542 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 20 [2022-01-18 15:44:38,542 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1567136799] [2022-01-18 15:44:38,542 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:44:38,542 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 15:44:38,542 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:44:38,542 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 15:44:38,542 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=347, Unknown=0, NotChecked=0, Total=420 [2022-01-18 15:44:38,543 INFO L87 Difference]: Start difference. First operand 2007 states and 8955 transitions. Second operand has 21 states, 21 states have (on average 3.7142857142857144) internal successors, (78), 20 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:44:39,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:44:39,411 INFO L93 Difference]: Finished difference Result 2978 states and 12458 transitions. [2022-01-18 15:44:39,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-01-18 15:44:39,411 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.7142857142857144) internal successors, (78), 20 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-01-18 15:44:39,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:44:39,418 INFO L225 Difference]: With dead ends: 2978 [2022-01-18 15:44:39,418 INFO L226 Difference]: Without dead ends: 2940 [2022-01-18 15:44:39,418 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 44 SyntacticMatches, 3 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 348 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=257, Invalid=1149, Unknown=0, NotChecked=0, Total=1406 [2022-01-18 15:44:39,418 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 522 mSDsluCounter, 1087 mSDsCounter, 0 mSdLazyCounter, 1375 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 522 SdHoareTripleChecker+Valid, 424 SdHoareTripleChecker+Invalid, 1439 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 1375 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 15:44:39,418 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [522 Valid, 424 Invalid, 1439 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 1375 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-18 15:44:39,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2940 states. [2022-01-18 15:44:39,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2940 to 2133. [2022-01-18 15:44:39,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2133 states, 2132 states have (on average 4.473264540337711) internal successors, (9537), 2132 states have internal predecessors, (9537), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:44:39,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2133 states to 2133 states and 9537 transitions. [2022-01-18 15:44:39,453 INFO L78 Accepts]: Start accepts. Automaton has 2133 states and 9537 transitions. Word has length 29 [2022-01-18 15:44:39,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:44:39,453 INFO L470 AbstractCegarLoop]: Abstraction has 2133 states and 9537 transitions. [2022-01-18 15:44:39,453 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.7142857142857144) internal successors, (78), 20 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:44:39,453 INFO L276 IsEmpty]: Start isEmpty. Operand 2133 states and 9537 transitions. [2022-01-18 15:44:39,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-01-18 15:44:39,456 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:44:39,456 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:44:39,472 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Forceful destruction successful, exit code 0 [2022-01-18 15:44:39,656 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59,56 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:44:39,657 INFO L402 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-01-18 15:44:39,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:44:39,657 INFO L85 PathProgramCache]: Analyzing trace with hash -636362485, now seen corresponding path program 26 times [2022-01-18 15:44:39,657 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:44:39,657 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [957897006] [2022-01-18 15:44:39,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:44:39,657 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:44:39,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:44:39,750 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:44:39,750 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:44:39,750 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [957897006] [2022-01-18 15:44:39,750 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [957897006] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:44:39,750 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [886142309] [2022-01-18 15:44:39,750 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 15:44:39,751 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:44:39,751 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:44:39,751 INFO L229 MonitoredProcess]: Starting monitored process 57 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:44:39,752 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2022-01-18 15:44:39,782 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:44:39,782 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:44:39,783 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2022-01-18 15:44:39,783 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:44:39,879 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:44:39,879 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2022-01-18 15:44:40,080 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:44:40,080 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:44:40,215 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:44:40,215 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [886142309] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:44:40,215 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:44:40,215 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 9] total 19 [2022-01-18 15:44:40,215 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1313824611] [2022-01-18 15:44:40,215 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:44:40,216 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 15:44:40,216 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:44:40,216 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 15:44:40,216 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=308, Unknown=0, NotChecked=0, Total=380 [2022-01-18 15:44:40,216 INFO L87 Difference]: Start difference. First operand 2133 states and 9537 transitions. Second operand has 20 states, 20 states have (on average 2.8) internal successors, (56), 19 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 15:44:40,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:44:40,679 INFO L93 Difference]: Finished difference Result 2472 states and 10662 transitions. [2022-01-18 15:44:40,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-01-18 15:44:40,679 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.8) internal successors, (56), 19 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 29 [2022-01-18 15:44:40,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:44:40,685 INFO L225 Difference]: With dead ends: 2472 [2022-01-18 15:44:40,685 INFO L226 Difference]: Without dead ends: 2459 [2022-01-18 15:44:40,685 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 45 SyntacticMatches, 3 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 194 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=172, Invalid=584, Unknown=0, NotChecked=0, Total=756 [2022-01-18 15:44:40,685 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 352 mSDsluCounter, 699 mSDsCounter, 0 mSdLazyCounter, 944 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 352 SdHoareTripleChecker+Valid, 281 SdHoareTripleChecker+Invalid, 967 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 944 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 15:44:40,686 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [352 Valid, 281 Invalid, 967 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 944 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 15:44:40,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2459 states. [2022-01-18 15:44:40,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2459 to 2133. [2022-01-18 15:44:40,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2133 states, 2132 states have (on average 4.471857410881801) internal successors, (9534), 2132 states have internal predecessors, (9534), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:44:40,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2133 states to 2133 states and 9534 transitions. [2022-01-18 15:44:40,717 INFO L78 Accepts]: Start accepts. Automaton has 2133 states and 9534 transitions. Word has length 29 [2022-01-18 15:44:40,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:44:40,717 INFO L470 AbstractCegarLoop]: Abstraction has 2133 states and 9534 transitions. [2022-01-18 15:44:40,718 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.8) internal successors, (56), 19 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 15:44:40,718 INFO L276 IsEmpty]: Start isEmpty. Operand 2133 states and 9534 transitions. [2022-01-18 15:44:40,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-01-18 15:44:40,721 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:44:40,721 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:44:40,739 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 15:44:40,922 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,57 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:44:40,922 INFO L402 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-01-18 15:44:40,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:44:40,922 INFO L85 PathProgramCache]: Analyzing trace with hash -1081464505, now seen corresponding path program 27 times [2022-01-18 15:44:40,922 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:44:40,922 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1453667055] [2022-01-18 15:44:40,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:44:40,922 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:44:40,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:44:41,029 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:44:41,030 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:44:41,030 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1453667055] [2022-01-18 15:44:41,030 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1453667055] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:44:41,030 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1859276645] [2022-01-18 15:44:41,030 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 15:44:41,030 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:44:41,030 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:44:41,031 INFO L229 MonitoredProcess]: Starting monitored process 58 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:44:41,032 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Waiting until timeout for monitored process [2022-01-18 15:44:41,062 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-01-18 15:44:41,062 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:44:41,063 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2022-01-18 15:44:41,063 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:44:41,197 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:44:41,197 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2022-01-18 15:44:41,424 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:44:41,424 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:44:41,566 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:44:41,566 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1859276645] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:44:41,566 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:44:41,566 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 20 [2022-01-18 15:44:41,566 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1159137922] [2022-01-18 15:44:41,566 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:44:41,566 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 15:44:41,566 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:44:41,566 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 15:44:41,566 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=351, Unknown=0, NotChecked=0, Total=420 [2022-01-18 15:44:41,567 INFO L87 Difference]: Start difference. First operand 2133 states and 9534 transitions. Second operand has 21 states, 21 states have (on average 2.6666666666666665) internal successors, (56), 20 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 15:44:42,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:44:42,097 INFO L93 Difference]: Finished difference Result 2427 states and 10549 transitions. [2022-01-18 15:44:42,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-01-18 15:44:42,097 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.6666666666666665) internal successors, (56), 20 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 29 [2022-01-18 15:44:42,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:44:42,102 INFO L225 Difference]: With dead ends: 2427 [2022-01-18 15:44:42,102 INFO L226 Difference]: Without dead ends: 2399 [2022-01-18 15:44:42,102 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 44 SyntacticMatches, 3 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 198 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=156, Invalid=656, Unknown=0, NotChecked=0, Total=812 [2022-01-18 15:44:42,103 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 279 mSDsluCounter, 685 mSDsCounter, 0 mSdLazyCounter, 974 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 279 SdHoareTripleChecker+Valid, 280 SdHoareTripleChecker+Invalid, 988 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 974 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 15:44:42,103 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [279 Valid, 280 Invalid, 988 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 974 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 15:44:42,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2399 states. [2022-01-18 15:44:42,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2399 to 2079. [2022-01-18 15:44:42,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2079 states, 2078 states have (on average 4.472569778633301) internal successors, (9294), 2078 states have internal predecessors, (9294), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:44:42,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2079 states to 2079 states and 9294 transitions. [2022-01-18 15:44:42,132 INFO L78 Accepts]: Start accepts. Automaton has 2079 states and 9294 transitions. Word has length 29 [2022-01-18 15:44:42,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:44:42,133 INFO L470 AbstractCegarLoop]: Abstraction has 2079 states and 9294 transitions. [2022-01-18 15:44:42,133 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.6666666666666665) internal successors, (56), 20 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 15:44:42,133 INFO L276 IsEmpty]: Start isEmpty. Operand 2079 states and 9294 transitions. [2022-01-18 15:44:42,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-01-18 15:44:42,136 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:44:42,136 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:44:42,154 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Ended with exit code 0 [2022-01-18 15:44:42,336 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,58 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:44:42,336 INFO L402 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-01-18 15:44:42,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:44:42,337 INFO L85 PathProgramCache]: Analyzing trace with hash 484686529, now seen corresponding path program 28 times [2022-01-18 15:44:42,337 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:44:42,337 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1919460504] [2022-01-18 15:44:42,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:44:42,337 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:44:42,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:44:42,435 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:44:42,435 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:44:42,435 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1919460504] [2022-01-18 15:44:42,435 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1919460504] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:44:42,435 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1761327659] [2022-01-18 15:44:42,435 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 15:44:42,436 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:44:42,436 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:44:42,436 INFO L229 MonitoredProcess]: Starting monitored process 59 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:44:42,437 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Waiting until timeout for monitored process [2022-01-18 15:44:42,479 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 15:44:42,479 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:44:42,480 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2022-01-18 15:44:42,480 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:44:42,611 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-01-18 15:44:42,733 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:44:42,733 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:44:42,852 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:44:42,853 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 22 [2022-01-18 15:44:42,864 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:44:42,864 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 7 [2022-01-18 15:44:42,914 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:44:42,915 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1761327659] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:44:42,915 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:44:42,915 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 21 [2022-01-18 15:44:42,915 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [421830185] [2022-01-18 15:44:42,915 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:44:42,915 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 15:44:42,915 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:44:42,915 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 15:44:42,915 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=401, Unknown=0, NotChecked=0, Total=462 [2022-01-18 15:44:42,915 INFO L87 Difference]: Start difference. First operand 2079 states and 9294 transitions. Second operand has 22 states, 22 states have (on average 3.5454545454545454) internal successors, (78), 21 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:44:44,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:44:44,009 INFO L93 Difference]: Finished difference Result 2708 states and 11522 transitions. [2022-01-18 15:44:44,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-01-18 15:44:44,010 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.5454545454545454) internal successors, (78), 21 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-01-18 15:44:44,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:44:44,015 INFO L225 Difference]: With dead ends: 2708 [2022-01-18 15:44:44,016 INFO L226 Difference]: Without dead ends: 2670 [2022-01-18 15:44:44,016 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 43 SyntacticMatches, 3 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 353 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=198, Invalid=1362, Unknown=0, NotChecked=0, Total=1560 [2022-01-18 15:44:44,016 INFO L933 BasicCegarLoop]: 44 mSDtfsCounter, 376 mSDsluCounter, 1617 mSDsCounter, 0 mSdLazyCounter, 2041 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 376 SdHoareTripleChecker+Valid, 632 SdHoareTripleChecker+Invalid, 2097 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 2041 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-18 15:44:44,016 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [376 Valid, 632 Invalid, 2097 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 2041 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-18 15:44:44,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2670 states. [2022-01-18 15:44:44,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2670 to 2082. [2022-01-18 15:44:44,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2082 states, 2081 states have (on average 4.470446900528592) internal successors, (9303), 2081 states have internal predecessors, (9303), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:44:44,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2082 states to 2082 states and 9303 transitions. [2022-01-18 15:44:44,047 INFO L78 Accepts]: Start accepts. Automaton has 2082 states and 9303 transitions. Word has length 29 [2022-01-18 15:44:44,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:44:44,047 INFO L470 AbstractCegarLoop]: Abstraction has 2082 states and 9303 transitions. [2022-01-18 15:44:44,047 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 3.5454545454545454) internal successors, (78), 21 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:44:44,047 INFO L276 IsEmpty]: Start isEmpty. Operand 2082 states and 9303 transitions. [2022-01-18 15:44:44,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-01-18 15:44:44,051 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:44:44,051 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:44:44,066 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 15:44:44,259 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,SelfDestructingSolverStorable62 [2022-01-18 15:44:44,259 INFO L402 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-01-18 15:44:44,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:44:44,260 INFO L85 PathProgramCache]: Analyzing trace with hash -838291121, now seen corresponding path program 29 times [2022-01-18 15:44:44,260 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:44:44,260 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1674296212] [2022-01-18 15:44:44,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:44:44,260 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:44:44,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:44:44,363 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:44:44,363 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:44:44,363 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1674296212] [2022-01-18 15:44:44,363 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1674296212] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:44:44,363 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [621418464] [2022-01-18 15:44:44,364 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 15:44:44,364 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:44:44,364 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:44:44,365 INFO L229 MonitoredProcess]: Starting monitored process 60 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:44:44,365 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Waiting until timeout for monitored process [2022-01-18 15:44:44,397 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 15:44:44,397 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:44:44,398 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 30 conjunts are in the unsatisfiable core [2022-01-18 15:44:44,399 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:44:44,588 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:44:44,588 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2022-01-18 15:44:44,845 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:44:44,846 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:44:45,011 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:44:45,011 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 22 [2022-01-18 15:44:45,021 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:44:45,021 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 7 [2022-01-18 15:44:45,096 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:44:45,096 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [621418464] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:44:45,096 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:44:45,096 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 21 [2022-01-18 15:44:45,096 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [246370650] [2022-01-18 15:44:45,096 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:44:45,096 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 15:44:45,096 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:44:45,097 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 15:44:45,097 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=393, Unknown=0, NotChecked=0, Total=462 [2022-01-18 15:44:45,097 INFO L87 Difference]: Start difference. First operand 2082 states and 9303 transitions. Second operand has 22 states, 22 states have (on average 3.3636363636363638) internal successors, (74), 21 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:44:45,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:44:45,860 INFO L93 Difference]: Finished difference Result 2482 states and 10735 transitions. [2022-01-18 15:44:45,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-01-18 15:44:45,861 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.3636363636363638) internal successors, (74), 21 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-01-18 15:44:45,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:44:45,867 INFO L225 Difference]: With dead ends: 2482 [2022-01-18 15:44:45,867 INFO L226 Difference]: Without dead ends: 2456 [2022-01-18 15:44:45,867 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 46 SyntacticMatches, 3 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 249 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=186, Invalid=1074, Unknown=0, NotChecked=0, Total=1260 [2022-01-18 15:44:45,867 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 159 mSDsluCounter, 747 mSDsCounter, 0 mSdLazyCounter, 807 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 159 SdHoareTripleChecker+Valid, 412 SdHoareTripleChecker+Invalid, 908 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 807 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 80 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 15:44:45,868 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [159 Valid, 412 Invalid, 908 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 807 Invalid, 0 Unknown, 80 Unchecked, 0.4s Time] [2022-01-18 15:44:45,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2456 states. [2022-01-18 15:44:45,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2456 to 2114. [2022-01-18 15:44:45,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2114 states, 2113 states have (on average 4.472314245149077) internal successors, (9450), 2113 states have internal predecessors, (9450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:44:45,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2114 states to 2114 states and 9450 transitions. [2022-01-18 15:44:45,903 INFO L78 Accepts]: Start accepts. Automaton has 2114 states and 9450 transitions. Word has length 29 [2022-01-18 15:44:45,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:44:45,903 INFO L470 AbstractCegarLoop]: Abstraction has 2114 states and 9450 transitions. [2022-01-18 15:44:45,904 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 3.3636363636363638) internal successors, (74), 21 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:44:45,904 INFO L276 IsEmpty]: Start isEmpty. Operand 2114 states and 9450 transitions. [2022-01-18 15:44:45,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-01-18 15:44:45,907 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:44:45,908 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:44:45,930 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 15:44:46,108 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,SelfDestructingSolverStorable63 [2022-01-18 15:44:46,108 INFO L402 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-01-18 15:44:46,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:44:46,108 INFO L85 PathProgramCache]: Analyzing trace with hash 1504652747, now seen corresponding path program 30 times [2022-01-18 15:44:46,108 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:44:46,108 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1663638519] [2022-01-18 15:44:46,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:44:46,109 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:44:46,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:44:46,205 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:44:46,205 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:44:46,205 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1663638519] [2022-01-18 15:44:46,205 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1663638519] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:44:46,205 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [738471891] [2022-01-18 15:44:46,205 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 15:44:46,206 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:44:46,206 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:44:46,207 INFO L229 MonitoredProcess]: Starting monitored process 61 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:44:46,208 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Waiting until timeout for monitored process [2022-01-18 15:44:46,240 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 15:44:46,240 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:44:46,241 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 31 conjunts are in the unsatisfiable core [2022-01-18 15:44:46,242 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:44:46,382 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-01-18 15:44:46,516 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:44:46,516 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:44:46,642 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:44:46,642 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 22 [2022-01-18 15:44:46,666 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:44:46,666 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 7 [2022-01-18 15:44:46,732 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:44:46,733 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [738471891] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:44:46,733 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:44:46,733 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 19 [2022-01-18 15:44:46,733 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1798399028] [2022-01-18 15:44:46,733 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:44:46,733 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 15:44:46,733 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:44:46,733 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 15:44:46,733 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=317, Unknown=0, NotChecked=0, Total=380 [2022-01-18 15:44:46,735 INFO L87 Difference]: Start difference. First operand 2114 states and 9450 transitions. Second operand has 20 states, 20 states have (on average 3.7) internal successors, (74), 19 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:44:47,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:44:47,576 INFO L93 Difference]: Finished difference Result 2705 states and 11560 transitions. [2022-01-18 15:44:47,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-01-18 15:44:47,576 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.7) internal successors, (74), 19 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-01-18 15:44:47,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:44:47,582 INFO L225 Difference]: With dead ends: 2705 [2022-01-18 15:44:47,582 INFO L226 Difference]: Without dead ends: 2683 [2022-01-18 15:44:47,582 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 45 SyntacticMatches, 3 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=162, Invalid=830, Unknown=0, NotChecked=0, Total=992 [2022-01-18 15:44:47,583 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 321 mSDsluCounter, 953 mSDsCounter, 0 mSdLazyCounter, 1269 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 321 SdHoareTripleChecker+Valid, 381 SdHoareTripleChecker+Invalid, 1310 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 1269 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 15:44:47,583 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [321 Valid, 381 Invalid, 1310 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 1269 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-18 15:44:47,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2683 states. [2022-01-18 15:44:47,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2683 to 2067. [2022-01-18 15:44:47,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2067 states, 2066 states have (on average 4.4767666989351405) internal successors, (9249), 2066 states have internal predecessors, (9249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:44:47,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2067 states to 2067 states and 9249 transitions. [2022-01-18 15:44:47,636 INFO L78 Accepts]: Start accepts. Automaton has 2067 states and 9249 transitions. Word has length 29 [2022-01-18 15:44:47,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:44:47,636 INFO L470 AbstractCegarLoop]: Abstraction has 2067 states and 9249 transitions. [2022-01-18 15:44:47,636 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.7) internal successors, (74), 19 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:44:47,636 INFO L276 IsEmpty]: Start isEmpty. Operand 2067 states and 9249 transitions. [2022-01-18 15:44:47,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-01-18 15:44:47,639 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:44:47,640 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:44:47,663 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Ended with exit code 0 [2022-01-18 15:44:47,840 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64,61 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:44:47,840 INFO L402 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-01-18 15:44:47,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:44:47,841 INFO L85 PathProgramCache]: Analyzing trace with hash -2032401569, now seen corresponding path program 1 times [2022-01-18 15:44:47,841 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:44:47,841 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1974043704] [2022-01-18 15:44:47,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:44:47,841 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:44:47,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:44:47,922 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:44:47,922 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:44:47,922 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1974043704] [2022-01-18 15:44:47,922 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1974043704] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:44:47,922 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [313186632] [2022-01-18 15:44:47,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:44:47,923 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:44:47,923 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:44:47,923 INFO L229 MonitoredProcess]: Starting monitored process 62 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:44:47,924 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Waiting until timeout for monitored process [2022-01-18 15:44:47,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:44:47,953 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2022-01-18 15:44:47,954 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:44:48,140 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-01-18 15:44:48,199 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:44:48,199 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:44:48,337 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:44:48,338 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 22 [2022-01-18 15:44:48,345 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:44:48,346 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 7 [2022-01-18 15:44:48,376 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:44:48,376 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [313186632] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:44:48,376 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:44:48,376 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 21 [2022-01-18 15:44:48,376 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [667878767] [2022-01-18 15:44:48,376 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:44:48,376 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 15:44:48,376 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:44:48,376 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 15:44:48,377 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=407, Unknown=0, NotChecked=0, Total=462 [2022-01-18 15:44:48,377 INFO L87 Difference]: Start difference. First operand 2067 states and 9249 transitions. Second operand has 22 states, 22 states have (on average 3.5454545454545454) internal successors, (78), 21 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:44:49,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:44:49,287 INFO L93 Difference]: Finished difference Result 2547 states and 11053 transitions. [2022-01-18 15:44:49,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-01-18 15:44:49,287 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.5454545454545454) internal successors, (78), 21 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-01-18 15:44:49,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:44:49,293 INFO L225 Difference]: With dead ends: 2547 [2022-01-18 15:44:49,293 INFO L226 Difference]: Without dead ends: 2528 [2022-01-18 15:44:49,293 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 43 SyntacticMatches, 3 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 264 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=184, Invalid=1222, Unknown=0, NotChecked=0, Total=1406 [2022-01-18 15:44:49,294 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 361 mSDsluCounter, 1156 mSDsCounter, 0 mSdLazyCounter, 1588 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 361 SdHoareTripleChecker+Valid, 427 SdHoareTripleChecker+Invalid, 1637 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 1588 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 15:44:49,294 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [361 Valid, 427 Invalid, 1637 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 1588 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-18 15:44:49,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2528 states. [2022-01-18 15:44:49,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2528 to 2169. [2022-01-18 15:44:49,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2169 states, 2168 states have (on average 4.455719557195572) internal successors, (9660), 2168 states have internal predecessors, (9660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:44:49,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2169 states to 2169 states and 9660 transitions. [2022-01-18 15:44:49,327 INFO L78 Accepts]: Start accepts. Automaton has 2169 states and 9660 transitions. Word has length 29 [2022-01-18 15:44:49,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:44:49,327 INFO L470 AbstractCegarLoop]: Abstraction has 2169 states and 9660 transitions. [2022-01-18 15:44:49,327 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 3.5454545454545454) internal successors, (78), 21 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:44:49,327 INFO L276 IsEmpty]: Start isEmpty. Operand 2169 states and 9660 transitions. [2022-01-18 15:44:49,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-01-18 15:44:49,330 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:44:49,331 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:44:49,346 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 15:44:49,546 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65,62 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:44:49,546 INFO L402 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-01-18 15:44:49,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:44:49,546 INFO L85 PathProgramCache]: Analyzing trace with hash -2037171777, now seen corresponding path program 1 times [2022-01-18 15:44:49,546 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:44:49,546 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1614577462] [2022-01-18 15:44:49,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:44:49,547 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:44:49,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:44:49,632 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:44:49,632 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:44:49,633 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1614577462] [2022-01-18 15:44:49,633 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1614577462] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:44:49,633 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [296201507] [2022-01-18 15:44:49,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:44:49,633 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:44:49,633 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:44:49,634 INFO L229 MonitoredProcess]: Starting monitored process 63 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:44:49,634 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Waiting until timeout for monitored process [2022-01-18 15:44:49,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:44:49,664 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2022-01-18 15:44:49,664 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:44:49,845 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-01-18 15:44:49,907 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:44:49,907 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:44:50,046 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:44:50,046 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 22 [2022-01-18 15:44:50,056 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:44:50,056 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 7 [2022-01-18 15:44:50,088 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:44:50,088 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [296201507] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:44:50,088 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:44:50,088 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 21 [2022-01-18 15:44:50,088 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [115904353] [2022-01-18 15:44:50,088 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:44:50,089 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 15:44:50,089 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:44:50,089 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 15:44:50,089 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=407, Unknown=0, NotChecked=0, Total=462 [2022-01-18 15:44:50,089 INFO L87 Difference]: Start difference. First operand 2169 states and 9660 transitions. Second operand has 22 states, 22 states have (on average 3.5454545454545454) internal successors, (78), 21 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:44:51,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:44:51,006 INFO L93 Difference]: Finished difference Result 2568 states and 11112 transitions. [2022-01-18 15:44:51,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-01-18 15:44:51,006 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.5454545454545454) internal successors, (78), 21 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-01-18 15:44:51,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:44:51,012 INFO L225 Difference]: With dead ends: 2568 [2022-01-18 15:44:51,012 INFO L226 Difference]: Without dead ends: 2549 [2022-01-18 15:44:51,012 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 43 SyntacticMatches, 3 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 265 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=184, Invalid=1222, Unknown=0, NotChecked=0, Total=1406 [2022-01-18 15:44:51,013 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 340 mSDsluCounter, 1132 mSDsCounter, 0 mSdLazyCounter, 1500 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 340 SdHoareTripleChecker+Valid, 419 SdHoareTripleChecker+Invalid, 1547 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 1500 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 15:44:51,013 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [340 Valid, 419 Invalid, 1547 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 1500 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-18 15:44:51,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2549 states. [2022-01-18 15:44:51,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2549 to 2171. [2022-01-18 15:44:51,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2171 states, 2170 states have (on average 4.455299539170507) internal successors, (9668), 2170 states have internal predecessors, (9668), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:44:51,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2171 states to 2171 states and 9668 transitions. [2022-01-18 15:44:51,043 INFO L78 Accepts]: Start accepts. Automaton has 2171 states and 9668 transitions. Word has length 29 [2022-01-18 15:44:51,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:44:51,043 INFO L470 AbstractCegarLoop]: Abstraction has 2171 states and 9668 transitions. [2022-01-18 15:44:51,044 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 3.5454545454545454) internal successors, (78), 21 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:44:51,044 INFO L276 IsEmpty]: Start isEmpty. Operand 2171 states and 9668 transitions. [2022-01-18 15:44:51,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-01-18 15:44:51,047 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:44:51,047 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:44:51,063 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Ended with exit code 0 [2022-01-18 15:44:51,247 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,SelfDestructingSolverStorable66 [2022-01-18 15:44:51,247 INFO L402 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-01-18 15:44:51,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:44:51,248 INFO L85 PathProgramCache]: Analyzing trace with hash 1254794295, now seen corresponding path program 2 times [2022-01-18 15:44:51,248 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:44:51,248 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [626748000] [2022-01-18 15:44:51,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:44:51,248 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:44:51,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:44:51,343 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:44:51,343 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:44:51,343 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [626748000] [2022-01-18 15:44:51,343 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [626748000] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:44:51,344 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1044626605] [2022-01-18 15:44:51,344 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 15:44:51,344 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:44:51,344 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:44:51,345 INFO L229 MonitoredProcess]: Starting monitored process 64 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:44:51,345 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Waiting until timeout for monitored process [2022-01-18 15:44:51,373 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:44:51,373 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:44:51,374 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2022-01-18 15:44:51,374 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:44:51,562 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:44:51,562 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2022-01-18 15:44:51,700 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:44:51,700 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:44:51,842 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:44:51,842 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1044626605] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:44:51,842 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:44:51,842 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 19 [2022-01-18 15:44:51,842 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [465678188] [2022-01-18 15:44:51,842 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:44:51,842 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 15:44:51,842 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:44:51,843 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 15:44:51,843 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=329, Unknown=0, NotChecked=0, Total=380 [2022-01-18 15:44:51,843 INFO L87 Difference]: Start difference. First operand 2171 states and 9668 transitions. Second operand has 20 states, 20 states have (on average 2.8) internal successors, (56), 19 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 15:44:52,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:44:52,338 INFO L93 Difference]: Finished difference Result 2471 states and 10753 transitions. [2022-01-18 15:44:52,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-18 15:44:52,338 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.8) internal successors, (56), 19 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 29 [2022-01-18 15:44:52,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:44:52,344 INFO L225 Difference]: With dead ends: 2471 [2022-01-18 15:44:52,344 INFO L226 Difference]: Without dead ends: 2452 [2022-01-18 15:44:52,344 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 45 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=92, Invalid=508, Unknown=0, NotChecked=0, Total=600 [2022-01-18 15:44:52,345 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 133 mSDsluCounter, 814 mSDsCounter, 0 mSdLazyCounter, 1074 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 133 SdHoareTripleChecker+Valid, 323 SdHoareTripleChecker+Invalid, 1077 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 1074 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 15:44:52,345 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [133 Valid, 323 Invalid, 1077 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 1074 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-18 15:44:52,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2452 states. [2022-01-18 15:44:52,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2452 to 2171. [2022-01-18 15:44:52,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2171 states, 2170 states have (on average 4.455299539170507) internal successors, (9668), 2170 states have internal predecessors, (9668), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:44:52,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2171 states to 2171 states and 9668 transitions. [2022-01-18 15:44:52,376 INFO L78 Accepts]: Start accepts. Automaton has 2171 states and 9668 transitions. Word has length 29 [2022-01-18 15:44:52,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:44:52,376 INFO L470 AbstractCegarLoop]: Abstraction has 2171 states and 9668 transitions. [2022-01-18 15:44:52,376 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.8) internal successors, (56), 19 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 15:44:52,376 INFO L276 IsEmpty]: Start isEmpty. Operand 2171 states and 9668 transitions. [2022-01-18 15:44:52,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-01-18 15:44:52,380 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:44:52,380 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:44:52,395 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Forceful destruction successful, exit code 0 [2022-01-18 15:44:52,580 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,SelfDestructingSolverStorable67 [2022-01-18 15:44:52,580 INFO L402 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-01-18 15:44:52,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:44:52,580 INFO L85 PathProgramCache]: Analyzing trace with hash 691196871, now seen corresponding path program 3 times [2022-01-18 15:44:52,580 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:44:52,580 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1929770042] [2022-01-18 15:44:52,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:44:52,581 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:44:52,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:44:52,666 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:44:52,666 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:44:52,666 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1929770042] [2022-01-18 15:44:52,666 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1929770042] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:44:52,667 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1373655471] [2022-01-18 15:44:52,667 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 15:44:52,667 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:44:52,667 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:44:52,668 INFO L229 MonitoredProcess]: Starting monitored process 65 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:44:52,668 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Waiting until timeout for monitored process [2022-01-18 15:44:52,701 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-01-18 15:44:52,701 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:44:52,701 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2022-01-18 15:44:52,702 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:44:52,884 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:44:52,885 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-18 15:44:53,002 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:44:53,002 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:44:53,150 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:44:53,151 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1373655471] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:44:53,151 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:44:53,151 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 19 [2022-01-18 15:44:53,151 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1619324853] [2022-01-18 15:44:53,151 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:44:53,151 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 15:44:53,151 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:44:53,151 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 15:44:53,151 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=325, Unknown=0, NotChecked=0, Total=380 [2022-01-18 15:44:53,151 INFO L87 Difference]: Start difference. First operand 2171 states and 9668 transitions. Second operand has 20 states, 20 states have (on average 2.8) internal successors, (56), 19 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 15:44:53,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:44:53,673 INFO L93 Difference]: Finished difference Result 2498 states and 10814 transitions. [2022-01-18 15:44:53,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-18 15:44:53,673 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.8) internal successors, (56), 19 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 29 [2022-01-18 15:44:53,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:44:53,678 INFO L225 Difference]: With dead ends: 2498 [2022-01-18 15:44:53,679 INFO L226 Difference]: Without dead ends: 2479 [2022-01-18 15:44:53,679 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 45 SyntacticMatches, 3 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=105, Invalid=545, Unknown=0, NotChecked=0, Total=650 [2022-01-18 15:44:53,679 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 230 mSDsluCounter, 831 mSDsCounter, 0 mSdLazyCounter, 1099 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 230 SdHoareTripleChecker+Valid, 328 SdHoareTripleChecker+Invalid, 1109 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 1099 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 15:44:53,679 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [230 Valid, 328 Invalid, 1109 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 1099 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-18 15:44:53,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2479 states. [2022-01-18 15:44:53,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2479 to 2174. [2022-01-18 15:44:53,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2174 states, 2173 states have (on average 4.453750575241601) internal successors, (9678), 2173 states have internal predecessors, (9678), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:44:53,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2174 states to 2174 states and 9678 transitions. [2022-01-18 15:44:53,711 INFO L78 Accepts]: Start accepts. Automaton has 2174 states and 9678 transitions. Word has length 29 [2022-01-18 15:44:53,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:44:53,711 INFO L470 AbstractCegarLoop]: Abstraction has 2174 states and 9678 transitions. [2022-01-18 15:44:53,712 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.8) internal successors, (56), 19 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 15:44:53,712 INFO L276 IsEmpty]: Start isEmpty. Operand 2174 states and 9678 transitions. [2022-01-18 15:44:53,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-01-18 15:44:53,715 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:44:53,715 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:44:53,730 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Forceful destruction successful, exit code 0 [2022-01-18 15:44:53,915 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68,65 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:44:53,915 INFO L402 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-01-18 15:44:53,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:44:53,916 INFO L85 PathProgramCache]: Analyzing trace with hash 319971865, now seen corresponding path program 4 times [2022-01-18 15:44:53,916 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:44:53,916 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2118640948] [2022-01-18 15:44:53,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:44:53,916 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:44:53,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:44:53,991 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:44:53,992 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:44:53,992 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2118640948] [2022-01-18 15:44:53,992 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2118640948] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:44:53,992 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1602888538] [2022-01-18 15:44:53,992 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 15:44:53,992 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:44:53,992 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:44:53,993 INFO L229 MonitoredProcess]: Starting monitored process 66 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:44:53,993 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Waiting until timeout for monitored process [2022-01-18 15:44:54,021 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 15:44:54,022 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:44:54,022 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2022-01-18 15:44:54,023 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:44:54,207 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2022-01-18 15:44:54,289 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:44:54,289 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:44:54,411 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:44:54,411 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 22 [2022-01-18 15:44:54,420 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:44:54,420 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 7 [2022-01-18 15:44:54,450 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:44:54,450 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1602888538] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:44:54,450 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:44:54,450 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 19 [2022-01-18 15:44:54,451 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [856921096] [2022-01-18 15:44:54,451 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:44:54,451 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 15:44:54,451 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:44:54,451 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 15:44:54,451 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=323, Unknown=0, NotChecked=0, Total=380 [2022-01-18 15:44:54,451 INFO L87 Difference]: Start difference. First operand 2174 states and 9678 transitions. Second operand has 20 states, 20 states have (on average 3.7) internal successors, (74), 19 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:44:55,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:44:55,280 INFO L93 Difference]: Finished difference Result 3172 states and 13428 transitions. [2022-01-18 15:44:55,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-01-18 15:44:55,280 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.7) internal successors, (74), 19 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-01-18 15:44:55,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:44:55,287 INFO L225 Difference]: With dead ends: 3172 [2022-01-18 15:44:55,288 INFO L226 Difference]: Without dead ends: 3144 [2022-01-18 15:44:55,288 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 45 SyntacticMatches, 3 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 260 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=181, Invalid=1079, Unknown=0, NotChecked=0, Total=1260 [2022-01-18 15:44:55,288 INFO L933 BasicCegarLoop]: 47 mSDtfsCounter, 366 mSDsluCounter, 1123 mSDsCounter, 0 mSdLazyCounter, 1497 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 366 SdHoareTripleChecker+Valid, 456 SdHoareTripleChecker+Invalid, 1525 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 1497 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 15:44:55,288 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [366 Valid, 456 Invalid, 1525 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 1497 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-18 15:44:55,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3144 states. [2022-01-18 15:44:55,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3144 to 2296. [2022-01-18 15:44:55,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2296 states, 2295 states have (on average 4.484967320261438) internal successors, (10293), 2295 states have internal predecessors, (10293), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:44:55,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2296 states to 2296 states and 10293 transitions. [2022-01-18 15:44:55,327 INFO L78 Accepts]: Start accepts. Automaton has 2296 states and 10293 transitions. Word has length 29 [2022-01-18 15:44:55,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:44:55,328 INFO L470 AbstractCegarLoop]: Abstraction has 2296 states and 10293 transitions. [2022-01-18 15:44:55,328 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.7) internal successors, (74), 19 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:44:55,328 INFO L276 IsEmpty]: Start isEmpty. Operand 2296 states and 10293 transitions. [2022-01-18 15:44:55,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-01-18 15:44:55,332 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:44:55,332 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:44:55,348 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Forceful destruction successful, exit code 0 [2022-01-18 15:44:55,545 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,SelfDestructingSolverStorable69 [2022-01-18 15:44:55,545 INFO L402 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-01-18 15:44:55,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:44:55,545 INFO L85 PathProgramCache]: Analyzing trace with hash 1267603755, now seen corresponding path program 2 times [2022-01-18 15:44:55,546 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:44:55,546 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [358266618] [2022-01-18 15:44:55,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:44:55,546 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:44:55,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:44:55,644 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:44:55,645 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:44:55,645 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [358266618] [2022-01-18 15:44:55,645 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [358266618] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:44:55,645 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [932504281] [2022-01-18 15:44:55,645 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 15:44:55,645 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:44:55,645 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:44:55,646 INFO L229 MonitoredProcess]: Starting monitored process 67 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:44:55,647 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Waiting until timeout for monitored process [2022-01-18 15:44:55,677 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:44:55,677 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:44:55,678 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2022-01-18 15:44:55,679 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:44:55,863 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:44:55,863 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-18 15:44:56,017 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:44:56,018 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:44:56,152 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:44:56,153 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [932504281] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:44:56,153 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:44:56,153 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 19 [2022-01-18 15:44:56,153 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [345741631] [2022-01-18 15:44:56,153 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:44:56,153 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 15:44:56,153 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:44:56,153 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 15:44:56,153 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=329, Unknown=0, NotChecked=0, Total=380 [2022-01-18 15:44:56,153 INFO L87 Difference]: Start difference. First operand 2296 states and 10293 transitions. Second operand has 20 states, 20 states have (on average 2.8) internal successors, (56), 19 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 15:44:56,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:44:56,674 INFO L93 Difference]: Finished difference Result 2614 states and 11429 transitions. [2022-01-18 15:44:56,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-18 15:44:56,674 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.8) internal successors, (56), 19 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 29 [2022-01-18 15:44:56,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:44:56,680 INFO L225 Difference]: With dead ends: 2614 [2022-01-18 15:44:56,680 INFO L226 Difference]: Without dead ends: 2595 [2022-01-18 15:44:56,680 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 45 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=92, Invalid=508, Unknown=0, NotChecked=0, Total=600 [2022-01-18 15:44:56,680 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 135 mSDsluCounter, 960 mSDsCounter, 0 mSdLazyCounter, 1250 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 135 SdHoareTripleChecker+Valid, 373 SdHoareTripleChecker+Invalid, 1253 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 1250 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 15:44:56,680 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [135 Valid, 373 Invalid, 1253 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 1250 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-18 15:44:56,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2595 states. [2022-01-18 15:44:56,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2595 to 2299. [2022-01-18 15:44:56,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2299 states, 2298 states have (on average 4.483028720626632) internal successors, (10302), 2298 states have internal predecessors, (10302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:44:56,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2299 states to 2299 states and 10302 transitions. [2022-01-18 15:44:56,713 INFO L78 Accepts]: Start accepts. Automaton has 2299 states and 10302 transitions. Word has length 29 [2022-01-18 15:44:56,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:44:56,713 INFO L470 AbstractCegarLoop]: Abstraction has 2299 states and 10302 transitions. [2022-01-18 15:44:56,713 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.8) internal successors, (56), 19 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 15:44:56,713 INFO L276 IsEmpty]: Start isEmpty. Operand 2299 states and 10302 transitions. [2022-01-18 15:44:56,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-01-18 15:44:56,717 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:44:56,717 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:44:56,732 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Ended with exit code 0 [2022-01-18 15:44:56,919 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,67 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:44:56,919 INFO L402 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-01-18 15:44:56,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:44:56,919 INFO L85 PathProgramCache]: Analyzing trace with hash -1477728721, now seen corresponding path program 3 times [2022-01-18 15:44:56,919 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:44:56,919 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [991289027] [2022-01-18 15:44:56,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:44:56,920 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:44:56,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:44:57,023 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:44:57,023 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:44:57,023 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [991289027] [2022-01-18 15:44:57,023 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [991289027] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:44:57,023 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1393996739] [2022-01-18 15:44:57,023 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 15:44:57,023 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:44:57,023 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:44:57,024 INFO L229 MonitoredProcess]: Starting monitored process 68 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:44:57,025 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Waiting until timeout for monitored process [2022-01-18 15:44:57,053 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-01-18 15:44:57,053 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:44:57,054 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2022-01-18 15:44:57,054 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:44:57,229 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:44:57,229 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 20 [2022-01-18 15:44:57,380 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:44:57,380 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:44:57,510 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:44:57,510 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1393996739] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:44:57,510 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:44:57,510 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 19 [2022-01-18 15:44:57,510 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1756503127] [2022-01-18 15:44:57,510 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:44:57,511 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 15:44:57,511 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:44:57,511 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 15:44:57,511 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=325, Unknown=0, NotChecked=0, Total=380 [2022-01-18 15:44:57,511 INFO L87 Difference]: Start difference. First operand 2299 states and 10302 transitions. Second operand has 20 states, 20 states have (on average 2.8) internal successors, (56), 19 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 15:44:58,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:44:58,045 INFO L93 Difference]: Finished difference Result 2653 states and 11530 transitions. [2022-01-18 15:44:58,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-18 15:44:58,046 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.8) internal successors, (56), 19 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 29 [2022-01-18 15:44:58,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:44:58,052 INFO L225 Difference]: With dead ends: 2653 [2022-01-18 15:44:58,052 INFO L226 Difference]: Without dead ends: 2634 [2022-01-18 15:44:58,052 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 45 SyntacticMatches, 3 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=105, Invalid=545, Unknown=0, NotChecked=0, Total=650 [2022-01-18 15:44:58,052 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 210 mSDsluCounter, 845 mSDsCounter, 0 mSdLazyCounter, 1137 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 210 SdHoareTripleChecker+Valid, 327 SdHoareTripleChecker+Invalid, 1147 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 1137 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 15:44:58,052 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [210 Valid, 327 Invalid, 1147 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 1137 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-18 15:44:58,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2634 states. [2022-01-18 15:44:58,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2634 to 2299. [2022-01-18 15:44:58,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2299 states, 2298 states have (on average 4.483028720626632) internal successors, (10302), 2298 states have internal predecessors, (10302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:44:58,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2299 states to 2299 states and 10302 transitions. [2022-01-18 15:44:58,086 INFO L78 Accepts]: Start accepts. Automaton has 2299 states and 10302 transitions. Word has length 29 [2022-01-18 15:44:58,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:44:58,086 INFO L470 AbstractCegarLoop]: Abstraction has 2299 states and 10302 transitions. [2022-01-18 15:44:58,086 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.8) internal successors, (56), 19 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 15:44:58,086 INFO L276 IsEmpty]: Start isEmpty. Operand 2299 states and 10302 transitions. [2022-01-18 15:44:58,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-01-18 15:44:58,090 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:44:58,090 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:44:58,105 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Ended with exit code 0 [2022-01-18 15:44:58,290 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,68 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:44:58,290 INFO L402 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-01-18 15:44:58,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:44:58,290 INFO L85 PathProgramCache]: Analyzing trace with hash -55373895, now seen corresponding path program 4 times [2022-01-18 15:44:58,291 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:44:58,291 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [983560352] [2022-01-18 15:44:58,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:44:58,291 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:44:58,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:44:58,376 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:44:58,376 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:44:58,376 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [983560352] [2022-01-18 15:44:58,376 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [983560352] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:44:58,376 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1875515701] [2022-01-18 15:44:58,376 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 15:44:58,377 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:44:58,377 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:44:58,380 INFO L229 MonitoredProcess]: Starting monitored process 69 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:44:58,381 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Waiting until timeout for monitored process [2022-01-18 15:44:58,408 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 15:44:58,408 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:44:58,409 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2022-01-18 15:44:58,409 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:44:58,578 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2022-01-18 15:44:58,679 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:44:58,679 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:44:58,808 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:44:58,809 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 22 [2022-01-18 15:44:58,816 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:44:58,817 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 7 [2022-01-18 15:44:58,845 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:44:58,845 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1875515701] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:44:58,845 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:44:58,846 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 19 [2022-01-18 15:44:58,846 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [753884104] [2022-01-18 15:44:58,846 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:44:58,846 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 15:44:58,846 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:44:58,846 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 15:44:58,846 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=323, Unknown=0, NotChecked=0, Total=380 [2022-01-18 15:44:58,846 INFO L87 Difference]: Start difference. First operand 2299 states and 10302 transitions. Second operand has 20 states, 20 states have (on average 3.7) internal successors, (74), 19 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:44:59,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:44:59,754 INFO L93 Difference]: Finished difference Result 3425 states and 14506 transitions. [2022-01-18 15:44:59,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-01-18 15:44:59,754 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.7) internal successors, (74), 19 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-01-18 15:44:59,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:44:59,761 INFO L225 Difference]: With dead ends: 3425 [2022-01-18 15:44:59,762 INFO L226 Difference]: Without dead ends: 3397 [2022-01-18 15:44:59,762 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 45 SyntacticMatches, 3 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 261 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=181, Invalid=1079, Unknown=0, NotChecked=0, Total=1260 [2022-01-18 15:44:59,762 INFO L933 BasicCegarLoop]: 47 mSDtfsCounter, 336 mSDsluCounter, 1356 mSDsCounter, 0 mSdLazyCounter, 1794 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 336 SdHoareTripleChecker+Valid, 545 SdHoareTripleChecker+Invalid, 1820 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 1794 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 15:44:59,762 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [336 Valid, 545 Invalid, 1820 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 1794 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-18 15:44:59,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3397 states. [2022-01-18 15:44:59,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3397 to 2390. [2022-01-18 15:44:59,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2390 states, 2389 states have (on average 4.50188363331938) internal successors, (10755), 2389 states have internal predecessors, (10755), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:44:59,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2390 states to 2390 states and 10755 transitions. [2022-01-18 15:44:59,807 INFO L78 Accepts]: Start accepts. Automaton has 2390 states and 10755 transitions. Word has length 29 [2022-01-18 15:44:59,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:44:59,807 INFO L470 AbstractCegarLoop]: Abstraction has 2390 states and 10755 transitions. [2022-01-18 15:44:59,807 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.7) internal successors, (74), 19 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:44:59,808 INFO L276 IsEmpty]: Start isEmpty. Operand 2390 states and 10755 transitions. [2022-01-18 15:44:59,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-01-18 15:44:59,812 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:44:59,812 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:44:59,829 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Forceful destruction successful, exit code 0 [2022-01-18 15:45:00,027 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,SelfDestructingSolverStorable72 [2022-01-18 15:45:00,027 INFO L402 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-01-18 15:45:00,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:45:00,028 INFO L85 PathProgramCache]: Analyzing trace with hash 11294687, now seen corresponding path program 5 times [2022-01-18 15:45:00,028 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:45:00,028 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1187726738] [2022-01-18 15:45:00,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:45:00,028 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:45:00,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:45:00,117 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:45:00,117 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:45:00,117 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1187726738] [2022-01-18 15:45:00,117 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1187726738] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:45:00,118 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1575898685] [2022-01-18 15:45:00,118 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 15:45:00,118 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:45:00,118 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:45:00,118 INFO L229 MonitoredProcess]: Starting monitored process 70 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:45:00,119 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Waiting until timeout for monitored process [2022-01-18 15:45:00,147 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:45:00,147 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:45:00,148 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 31 conjunts are in the unsatisfiable core [2022-01-18 15:45:00,148 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:45:00,313 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2022-01-18 15:45:00,416 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:45:00,416 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:45:00,556 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:45:00,556 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 22 [2022-01-18 15:45:00,566 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:45:00,567 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 7 [2022-01-18 15:45:00,597 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:45:00,597 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1575898685] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:45:00,597 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:45:00,597 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 21 [2022-01-18 15:45:00,597 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1784940827] [2022-01-18 15:45:00,597 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:45:00,598 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 15:45:00,598 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:45:00,598 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 15:45:00,598 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=403, Unknown=0, NotChecked=0, Total=462 [2022-01-18 15:45:00,598 INFO L87 Difference]: Start difference. First operand 2390 states and 10755 transitions. Second operand has 22 states, 22 states have (on average 3.5454545454545454) internal successors, (78), 21 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:45:01,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:45:01,821 INFO L93 Difference]: Finished difference Result 3525 states and 14857 transitions. [2022-01-18 15:45:01,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-01-18 15:45:01,822 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.5454545454545454) internal successors, (78), 21 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-01-18 15:45:01,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:45:01,830 INFO L225 Difference]: With dead ends: 3525 [2022-01-18 15:45:01,830 INFO L226 Difference]: Without dead ends: 3452 [2022-01-18 15:45:01,830 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 42 SyntacticMatches, 4 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 397 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=214, Invalid=1508, Unknown=0, NotChecked=0, Total=1722 [2022-01-18 15:45:01,830 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 477 mSDsluCounter, 1565 mSDsCounter, 0 mSdLazyCounter, 1991 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 477 SdHoareTripleChecker+Valid, 593 SdHoareTripleChecker+Invalid, 2065 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 1991 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-18 15:45:01,830 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [477 Valid, 593 Invalid, 2065 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 1991 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-18 15:45:01,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3452 states. [2022-01-18 15:45:01,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3452 to 2361. [2022-01-18 15:45:01,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2361 states, 2360 states have (on average 4.497457627118644) internal successors, (10614), 2360 states have internal predecessors, (10614), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:45:01,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2361 states to 2361 states and 10614 transitions. [2022-01-18 15:45:01,872 INFO L78 Accepts]: Start accepts. Automaton has 2361 states and 10614 transitions. Word has length 29 [2022-01-18 15:45:01,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:45:01,872 INFO L470 AbstractCegarLoop]: Abstraction has 2361 states and 10614 transitions. [2022-01-18 15:45:01,872 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 3.5454545454545454) internal successors, (78), 21 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:45:01,872 INFO L276 IsEmpty]: Start isEmpty. Operand 2361 states and 10614 transitions. [2022-01-18 15:45:01,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-01-18 15:45:01,876 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:45:01,876 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:45:01,897 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 15:45:02,077 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,70 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:45:02,077 INFO L402 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-01-18 15:45:02,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:45:02,077 INFO L85 PathProgramCache]: Analyzing trace with hash 1417591807, now seen corresponding path program 5 times [2022-01-18 15:45:02,077 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:45:02,077 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1364175993] [2022-01-18 15:45:02,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:45:02,077 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:45:02,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:45:02,167 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:45:02,167 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:45:02,167 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1364175993] [2022-01-18 15:45:02,167 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1364175993] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:45:02,167 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [791202570] [2022-01-18 15:45:02,167 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 15:45:02,167 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:45:02,167 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:45:02,168 INFO L229 MonitoredProcess]: Starting monitored process 71 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:45:02,175 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Waiting until timeout for monitored process [2022-01-18 15:45:02,204 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:45:02,205 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:45:02,205 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 27 conjunts are in the unsatisfiable core [2022-01-18 15:45:02,206 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:45:02,333 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2022-01-18 15:45:02,434 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:45:02,434 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:45:02,586 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:45:02,586 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 22 [2022-01-18 15:45:02,595 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:45:02,596 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 7 [2022-01-18 15:45:02,628 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:45:02,628 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [791202570] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:45:02,629 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:45:02,629 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 20 [2022-01-18 15:45:02,629 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1151125330] [2022-01-18 15:45:02,629 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:45:02,629 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 15:45:02,629 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:45:02,630 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 15:45:02,630 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=365, Unknown=0, NotChecked=0, Total=420 [2022-01-18 15:45:02,630 INFO L87 Difference]: Start difference. First operand 2361 states and 10614 transitions. Second operand has 21 states, 21 states have (on average 3.380952380952381) internal successors, (71), 20 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:45:03,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:45:03,651 INFO L93 Difference]: Finished difference Result 3500 states and 14724 transitions. [2022-01-18 15:45:03,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-01-18 15:45:03,652 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.380952380952381) internal successors, (71), 20 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-01-18 15:45:03,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:45:03,659 INFO L225 Difference]: With dead ends: 3500 [2022-01-18 15:45:03,659 INFO L226 Difference]: Without dead ends: 3446 [2022-01-18 15:45:03,659 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 43 SyntacticMatches, 4 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 325 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=192, Invalid=1290, Unknown=0, NotChecked=0, Total=1482 [2022-01-18 15:45:03,660 INFO L933 BasicCegarLoop]: 45 mSDtfsCounter, 527 mSDsluCounter, 1213 mSDsCounter, 0 mSdLazyCounter, 1542 mSolverCounterSat, 80 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 527 SdHoareTripleChecker+Valid, 476 SdHoareTripleChecker+Invalid, 1622 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 80 IncrementalHoareTripleChecker+Valid, 1542 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 15:45:03,660 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [527 Valid, 476 Invalid, 1622 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [80 Valid, 1542 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-18 15:45:03,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3446 states. [2022-01-18 15:45:03,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3446 to 2300. [2022-01-18 15:45:03,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2300 states, 2299 states have (on average 4.5045672031317965) internal successors, (10356), 2299 states have internal predecessors, (10356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:45:03,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2300 states to 2300 states and 10356 transitions. [2022-01-18 15:45:03,695 INFO L78 Accepts]: Start accepts. Automaton has 2300 states and 10356 transitions. Word has length 29 [2022-01-18 15:45:03,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:45:03,695 INFO L470 AbstractCegarLoop]: Abstraction has 2300 states and 10356 transitions. [2022-01-18 15:45:03,695 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.380952380952381) internal successors, (71), 20 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:45:03,695 INFO L276 IsEmpty]: Start isEmpty. Operand 2300 states and 10356 transitions. [2022-01-18 15:45:03,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-01-18 15:45:03,699 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:45:03,699 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:45:03,715 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 15:45:03,900 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74,71 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:45:03,901 INFO L402 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-01-18 15:45:03,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:45:03,901 INFO L85 PathProgramCache]: Analyzing trace with hash 1130286919, now seen corresponding path program 6 times [2022-01-18 15:45:03,901 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:45:03,901 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [968450487] [2022-01-18 15:45:03,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:45:03,901 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:45:03,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:45:04,021 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:45:04,021 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:45:04,021 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [968450487] [2022-01-18 15:45:04,022 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [968450487] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:45:04,022 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2094095343] [2022-01-18 15:45:04,022 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 15:45:04,022 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:45:04,022 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:45:04,023 INFO L229 MonitoredProcess]: Starting monitored process 72 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:45:04,023 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Waiting until timeout for monitored process [2022-01-18 15:45:04,052 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-01-18 15:45:04,052 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:45:04,052 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2022-01-18 15:45:04,053 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:45:04,185 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:45:04,185 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2022-01-18 15:45:04,385 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:45:04,385 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:45:04,530 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:45:04,531 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2094095343] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:45:04,531 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:45:04,531 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 20 [2022-01-18 15:45:04,531 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [10571850] [2022-01-18 15:45:04,531 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:45:04,531 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 15:45:04,531 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:45:04,531 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 15:45:04,531 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=351, Unknown=0, NotChecked=0, Total=420 [2022-01-18 15:45:04,532 INFO L87 Difference]: Start difference. First operand 2300 states and 10356 transitions. Second operand has 21 states, 21 states have (on average 2.9523809523809526) internal successors, (62), 20 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:45:05,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:45:05,120 INFO L93 Difference]: Finished difference Result 2715 states and 11861 transitions. [2022-01-18 15:45:05,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-01-18 15:45:05,120 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.9523809523809526) internal successors, (62), 20 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 29 [2022-01-18 15:45:05,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:45:05,126 INFO L225 Difference]: With dead ends: 2715 [2022-01-18 15:45:05,127 INFO L226 Difference]: Without dead ends: 2696 [2022-01-18 15:45:05,127 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 44 SyntacticMatches, 3 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 198 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=156, Invalid=656, Unknown=0, NotChecked=0, Total=812 [2022-01-18 15:45:05,127 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 365 mSDsluCounter, 818 mSDsCounter, 0 mSdLazyCounter, 1107 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 365 SdHoareTripleChecker+Valid, 320 SdHoareTripleChecker+Invalid, 1126 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 1107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 15:45:05,127 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [365 Valid, 320 Invalid, 1126 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 1107 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-18 15:45:05,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2696 states. [2022-01-18 15:45:05,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2696 to 2350. [2022-01-18 15:45:05,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2350 states, 2349 states have (on average 4.5053214133673904) internal successors, (10583), 2349 states have internal predecessors, (10583), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:45:05,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2350 states to 2350 states and 10583 transitions. [2022-01-18 15:45:05,164 INFO L78 Accepts]: Start accepts. Automaton has 2350 states and 10583 transitions. Word has length 29 [2022-01-18 15:45:05,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:45:05,164 INFO L470 AbstractCegarLoop]: Abstraction has 2350 states and 10583 transitions. [2022-01-18 15:45:05,164 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.9523809523809526) internal successors, (62), 20 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:45:05,164 INFO L276 IsEmpty]: Start isEmpty. Operand 2350 states and 10583 transitions. [2022-01-18 15:45:05,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-01-18 15:45:05,167 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:45:05,167 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:45:05,184 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Ended with exit code 0 [2022-01-18 15:45:05,368 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,72 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:45:05,368 INFO L402 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-01-18 15:45:05,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:45:05,368 INFO L85 PathProgramCache]: Analyzing trace with hash -1861407771, now seen corresponding path program 7 times [2022-01-18 15:45:05,368 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:45:05,368 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1874726111] [2022-01-18 15:45:05,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:45:05,368 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:45:05,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:45:05,480 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:45:05,480 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:45:05,481 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1874726111] [2022-01-18 15:45:05,481 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1874726111] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:45:05,481 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2015244917] [2022-01-18 15:45:05,481 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 15:45:05,481 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:45:05,481 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:45:05,482 INFO L229 MonitoredProcess]: Starting monitored process 73 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:45:05,483 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Waiting until timeout for monitored process [2022-01-18 15:45:05,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:45:05,512 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2022-01-18 15:45:05,512 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:45:05,667 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-01-18 15:45:05,798 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:45:05,798 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:45:05,928 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:45:05,928 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 22 [2022-01-18 15:45:05,938 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:45:05,939 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 7 [2022-01-18 15:45:05,971 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:45:05,972 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2015244917] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:45:05,972 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:45:05,972 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 19 [2022-01-18 15:45:05,972 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [99235704] [2022-01-18 15:45:05,972 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:45:05,972 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 15:45:05,972 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:45:05,972 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 15:45:05,972 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=311, Unknown=0, NotChecked=0, Total=380 [2022-01-18 15:45:05,972 INFO L87 Difference]: Start difference. First operand 2350 states and 10583 transitions. Second operand has 20 states, 20 states have (on average 3.7) internal successors, (74), 19 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:45:06,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:45:06,734 INFO L93 Difference]: Finished difference Result 3293 states and 14031 transitions. [2022-01-18 15:45:06,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-01-18 15:45:06,735 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.7) internal successors, (74), 19 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-01-18 15:45:06,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:45:06,758 INFO L225 Difference]: With dead ends: 3293 [2022-01-18 15:45:06,758 INFO L226 Difference]: Without dead ends: 3265 [2022-01-18 15:45:06,758 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 45 SyntacticMatches, 3 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 250 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=202, Invalid=854, Unknown=0, NotChecked=0, Total=1056 [2022-01-18 15:45:06,758 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 400 mSDsluCounter, 1082 mSDsCounter, 0 mSdLazyCounter, 1381 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 400 SdHoareTripleChecker+Valid, 418 SdHoareTripleChecker+Invalid, 1424 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 1381 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 15:45:06,758 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [400 Valid, 418 Invalid, 1424 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 1381 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-18 15:45:06,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3265 states. [2022-01-18 15:45:06,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3265 to 2460. [2022-01-18 15:45:06,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2460 states, 2459 states have (on average 4.513623424156161) internal successors, (11099), 2459 states have internal predecessors, (11099), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:45:06,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2460 states to 2460 states and 11099 transitions. [2022-01-18 15:45:06,798 INFO L78 Accepts]: Start accepts. Automaton has 2460 states and 11099 transitions. Word has length 29 [2022-01-18 15:45:06,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:45:06,798 INFO L470 AbstractCegarLoop]: Abstraction has 2460 states and 11099 transitions. [2022-01-18 15:45:06,798 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.7) internal successors, (74), 19 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:45:06,798 INFO L276 IsEmpty]: Start isEmpty. Operand 2460 states and 11099 transitions. [2022-01-18 15:45:06,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-01-18 15:45:06,802 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:45:06,802 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:45:06,817 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Ended with exit code 0 [2022-01-18 15:45:07,002 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,SelfDestructingSolverStorable76 [2022-01-18 15:45:07,002 INFO L402 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-01-18 15:45:07,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:45:07,003 INFO L85 PathProgramCache]: Analyzing trace with hash -1914794291, now seen corresponding path program 8 times [2022-01-18 15:45:07,003 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:45:07,003 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1679174107] [2022-01-18 15:45:07,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:45:07,003 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:45:07,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:45:07,093 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:45:07,094 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:45:07,094 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1679174107] [2022-01-18 15:45:07,094 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1679174107] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:45:07,094 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1995358746] [2022-01-18 15:45:07,094 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 15:45:07,094 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:45:07,094 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:45:07,095 INFO L229 MonitoredProcess]: Starting monitored process 74 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:45:07,096 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Waiting until timeout for monitored process [2022-01-18 15:45:07,122 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:45:07,123 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:45:07,123 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2022-01-18 15:45:07,124 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:45:07,243 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:45:07,243 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2022-01-18 15:45:07,429 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:45:07,429 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:45:07,563 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:45:07,563 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1995358746] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:45:07,563 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:45:07,563 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 9] total 19 [2022-01-18 15:45:07,563 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [133579150] [2022-01-18 15:45:07,563 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:45:07,563 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 15:45:07,563 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:45:07,563 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 15:45:07,564 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=308, Unknown=0, NotChecked=0, Total=380 [2022-01-18 15:45:07,564 INFO L87 Difference]: Start difference. First operand 2460 states and 11099 transitions. Second operand has 20 states, 20 states have (on average 3.0) internal successors, (60), 19 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:45:07,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:45:07,993 INFO L93 Difference]: Finished difference Result 2720 states and 12010 transitions. [2022-01-18 15:45:07,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-01-18 15:45:07,993 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.0) internal successors, (60), 19 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 29 [2022-01-18 15:45:07,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:45:08,000 INFO L225 Difference]: With dead ends: 2720 [2022-01-18 15:45:08,000 INFO L226 Difference]: Without dead ends: 2697 [2022-01-18 15:45:08,001 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 45 SyntacticMatches, 3 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 194 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=172, Invalid=584, Unknown=0, NotChecked=0, Total=756 [2022-01-18 15:45:08,001 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 385 mSDsluCounter, 583 mSDsCounter, 0 mSdLazyCounter, 784 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 385 SdHoareTripleChecker+Valid, 230 SdHoareTripleChecker+Invalid, 807 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 784 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 15:45:08,001 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [385 Valid, 230 Invalid, 807 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 784 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 15:45:08,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2697 states. [2022-01-18 15:45:08,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2697 to 2404. [2022-01-18 15:45:08,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2404 states, 2403 states have (on average 4.516437786100707) internal successors, (10853), 2403 states have internal predecessors, (10853), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:45:08,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2404 states to 2404 states and 10853 transitions. [2022-01-18 15:45:08,040 INFO L78 Accepts]: Start accepts. Automaton has 2404 states and 10853 transitions. Word has length 29 [2022-01-18 15:45:08,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:45:08,041 INFO L470 AbstractCegarLoop]: Abstraction has 2404 states and 10853 transitions. [2022-01-18 15:45:08,041 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.0) internal successors, (60), 19 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:45:08,041 INFO L276 IsEmpty]: Start isEmpty. Operand 2404 states and 10853 transitions. [2022-01-18 15:45:08,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-01-18 15:45:08,044 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:45:08,045 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:45:08,061 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Forceful destruction successful, exit code 0 [2022-01-18 15:45:08,245 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77,74 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:45:08,245 INFO L402 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-01-18 15:45:08,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:45:08,245 INFO L85 PathProgramCache]: Analyzing trace with hash 1843632387, now seen corresponding path program 9 times [2022-01-18 15:45:08,245 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:45:08,245 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1319356725] [2022-01-18 15:45:08,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:45:08,246 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:45:08,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:45:08,346 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:45:08,346 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:45:08,346 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1319356725] [2022-01-18 15:45:08,346 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1319356725] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:45:08,346 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1563053522] [2022-01-18 15:45:08,347 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 15:45:08,347 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:45:08,347 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:45:08,347 INFO L229 MonitoredProcess]: Starting monitored process 75 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:45:08,348 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Waiting until timeout for monitored process [2022-01-18 15:45:08,376 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-01-18 15:45:08,376 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:45:08,376 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2022-01-18 15:45:08,377 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:45:08,506 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:45:08,506 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2022-01-18 15:45:08,723 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:45:08,724 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:45:08,875 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:45:08,876 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1563053522] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:45:08,876 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:45:08,876 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 20 [2022-01-18 15:45:08,876 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1762506827] [2022-01-18 15:45:08,876 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:45:08,876 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 15:45:08,876 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:45:08,876 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 15:45:08,876 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=364, Unknown=0, NotChecked=0, Total=420 [2022-01-18 15:45:08,876 INFO L87 Difference]: Start difference. First operand 2404 states and 10853 transitions. Second operand has 21 states, 21 states have (on average 2.9523809523809526) internal successors, (62), 20 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:45:09,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:45:09,448 INFO L93 Difference]: Finished difference Result 2552 states and 11385 transitions. [2022-01-18 15:45:09,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-18 15:45:09,449 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.9523809523809526) internal successors, (62), 20 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 29 [2022-01-18 15:45:09,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:45:09,455 INFO L225 Difference]: With dead ends: 2552 [2022-01-18 15:45:09,455 INFO L226 Difference]: Without dead ends: 2533 [2022-01-18 15:45:09,455 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 44 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=102, Invalid=600, Unknown=0, NotChecked=0, Total=702 [2022-01-18 15:45:09,455 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 124 mSDsluCounter, 896 mSDsCounter, 0 mSdLazyCounter, 1239 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 124 SdHoareTripleChecker+Valid, 347 SdHoareTripleChecker+Invalid, 1242 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 1239 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 15:45:09,455 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [124 Valid, 347 Invalid, 1242 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 1239 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-18 15:45:09,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2533 states. [2022-01-18 15:45:09,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2533 to 2404. [2022-01-18 15:45:09,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2404 states, 2403 states have (on average 4.516437786100707) internal successors, (10853), 2403 states have internal predecessors, (10853), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:45:09,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2404 states to 2404 states and 10853 transitions. [2022-01-18 15:45:09,489 INFO L78 Accepts]: Start accepts. Automaton has 2404 states and 10853 transitions. Word has length 29 [2022-01-18 15:45:09,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:45:09,489 INFO L470 AbstractCegarLoop]: Abstraction has 2404 states and 10853 transitions. [2022-01-18 15:45:09,489 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.9523809523809526) internal successors, (62), 20 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:45:09,489 INFO L276 IsEmpty]: Start isEmpty. Operand 2404 states and 10853 transitions. [2022-01-18 15:45:09,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-01-18 15:45:09,493 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:45:09,493 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:45:09,508 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Ended with exit code 0 [2022-01-18 15:45:09,693 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78,75 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:45:09,693 INFO L402 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-01-18 15:45:09,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:45:09,694 INFO L85 PathProgramCache]: Analyzing trace with hash 1280034963, now seen corresponding path program 10 times [2022-01-18 15:45:09,694 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:45:09,694 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [604543191] [2022-01-18 15:45:09,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:45:09,694 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:45:09,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:45:09,790 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:45:09,790 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:45:09,790 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [604543191] [2022-01-18 15:45:09,790 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [604543191] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:45:09,790 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [875087410] [2022-01-18 15:45:09,790 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 15:45:09,790 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:45:09,790 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:45:09,791 INFO L229 MonitoredProcess]: Starting monitored process 76 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:45:09,791 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Waiting until timeout for monitored process [2022-01-18 15:45:09,819 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 15:45:09,819 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:45:09,820 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2022-01-18 15:45:09,820 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:45:09,951 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-01-18 15:45:10,091 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:45:10,091 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:45:10,213 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:45:10,213 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 22 [2022-01-18 15:45:10,221 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:45:10,221 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 7 [2022-01-18 15:45:10,252 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:45:10,252 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [875087410] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:45:10,252 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:45:10,252 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 20 [2022-01-18 15:45:10,252 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [593703487] [2022-01-18 15:45:10,252 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:45:10,252 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 15:45:10,252 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:45:10,252 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 15:45:10,252 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=353, Unknown=0, NotChecked=0, Total=420 [2022-01-18 15:45:10,252 INFO L87 Difference]: Start difference. First operand 2404 states and 10853 transitions. Second operand has 21 states, 21 states have (on average 3.7142857142857144) internal successors, (78), 20 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:45:11,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:45:11,102 INFO L93 Difference]: Finished difference Result 3157 states and 13499 transitions. [2022-01-18 15:45:11,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-01-18 15:45:11,102 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.7142857142857144) internal successors, (78), 20 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-01-18 15:45:11,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:45:11,109 INFO L225 Difference]: With dead ends: 3157 [2022-01-18 15:45:11,109 INFO L226 Difference]: Without dead ends: 3115 [2022-01-18 15:45:11,110 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 44 SyntacticMatches, 3 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 295 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=215, Invalid=1117, Unknown=0, NotChecked=0, Total=1332 [2022-01-18 15:45:11,110 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 487 mSDsluCounter, 924 mSDsCounter, 0 mSdLazyCounter, 1177 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 487 SdHoareTripleChecker+Valid, 377 SdHoareTripleChecker+Invalid, 1245 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 1177 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 15:45:11,110 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [487 Valid, 377 Invalid, 1245 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 1177 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-18 15:45:11,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3115 states. [2022-01-18 15:45:11,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3115 to 2389. [2022-01-18 15:45:11,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2389 states, 2388 states have (on average 4.516331658291457) internal successors, (10785), 2388 states have internal predecessors, (10785), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:45:11,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2389 states to 2389 states and 10785 transitions. [2022-01-18 15:45:11,146 INFO L78 Accepts]: Start accepts. Automaton has 2389 states and 10785 transitions. Word has length 29 [2022-01-18 15:45:11,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:45:11,146 INFO L470 AbstractCegarLoop]: Abstraction has 2389 states and 10785 transitions. [2022-01-18 15:45:11,146 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.7142857142857144) internal successors, (78), 20 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:45:11,146 INFO L276 IsEmpty]: Start isEmpty. Operand 2389 states and 10785 transitions. [2022-01-18 15:45:11,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-01-18 15:45:11,150 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:45:11,150 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:45:11,166 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Ended with exit code 0 [2022-01-18 15:45:11,350 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,SelfDestructingSolverStorable79 [2022-01-18 15:45:11,351 INFO L402 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-01-18 15:45:11,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:45:11,351 INFO L85 PathProgramCache]: Analyzing trace with hash -109274557, now seen corresponding path program 11 times [2022-01-18 15:45:11,351 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:45:11,351 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [696457142] [2022-01-18 15:45:11,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:45:11,351 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:45:11,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:45:11,450 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:45:11,451 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:45:11,451 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [696457142] [2022-01-18 15:45:11,451 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [696457142] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:45:11,451 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [163857913] [2022-01-18 15:45:11,451 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 15:45:11,451 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:45:11,451 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:45:11,452 INFO L229 MonitoredProcess]: Starting monitored process 77 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:45:11,452 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Waiting until timeout for monitored process [2022-01-18 15:45:11,481 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 15:45:11,481 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:45:11,482 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2022-01-18 15:45:11,482 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:45:11,609 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-01-18 15:45:11,733 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:45:11,733 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:45:11,857 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:45:11,857 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 22 [2022-01-18 15:45:11,865 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:45:11,865 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 7 [2022-01-18 15:45:11,892 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:45:11,892 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [163857913] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:45:11,892 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:45:11,892 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 20 [2022-01-18 15:45:11,893 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [730106903] [2022-01-18 15:45:11,893 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:45:11,893 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 15:45:11,893 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:45:11,893 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 15:45:11,893 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=347, Unknown=0, NotChecked=0, Total=420 [2022-01-18 15:45:11,893 INFO L87 Difference]: Start difference. First operand 2389 states and 10785 transitions. Second operand has 21 states, 21 states have (on average 3.7142857142857144) internal successors, (78), 20 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:45:12,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:45:12,826 INFO L93 Difference]: Finished difference Result 3246 states and 13969 transitions. [2022-01-18 15:45:12,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-01-18 15:45:12,826 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.7142857142857144) internal successors, (78), 20 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-01-18 15:45:12,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:45:12,834 INFO L225 Difference]: With dead ends: 3246 [2022-01-18 15:45:12,834 INFO L226 Difference]: Without dead ends: 3208 [2022-01-18 15:45:12,834 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 44 SyntacticMatches, 3 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 350 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=258, Invalid=1148, Unknown=0, NotChecked=0, Total=1406 [2022-01-18 15:45:12,834 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 404 mSDsluCounter, 1121 mSDsCounter, 0 mSdLazyCounter, 1461 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 404 SdHoareTripleChecker+Valid, 428 SdHoareTripleChecker+Invalid, 1508 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 1461 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 15:45:12,835 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [404 Valid, 428 Invalid, 1508 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 1461 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-18 15:45:12,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3208 states. [2022-01-18 15:45:12,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3208 to 2531. [2022-01-18 15:45:12,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2531 states, 2530 states have (on average 4.519762845849803) internal successors, (11435), 2530 states have internal predecessors, (11435), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:45:12,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2531 states to 2531 states and 11435 transitions. [2022-01-18 15:45:12,876 INFO L78 Accepts]: Start accepts. Automaton has 2531 states and 11435 transitions. Word has length 29 [2022-01-18 15:45:12,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:45:12,876 INFO L470 AbstractCegarLoop]: Abstraction has 2531 states and 11435 transitions. [2022-01-18 15:45:12,879 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.7142857142857144) internal successors, (78), 20 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:45:12,879 INFO L276 IsEmpty]: Start isEmpty. Operand 2531 states and 11435 transitions. [2022-01-18 15:45:12,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-01-18 15:45:12,883 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:45:12,883 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:45:12,899 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 15:45:13,091 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,77 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:45:13,091 INFO L402 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-01-18 15:45:13,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:45:13,092 INFO L85 PathProgramCache]: Analyzing trace with hash 1193998049, now seen corresponding path program 12 times [2022-01-18 15:45:13,092 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:45:13,092 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [825741050] [2022-01-18 15:45:13,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:45:13,092 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:45:13,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:45:13,195 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:45:13,195 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:45:13,195 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [825741050] [2022-01-18 15:45:13,195 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [825741050] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:45:13,195 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [570550645] [2022-01-18 15:45:13,195 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 15:45:13,195 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:45:13,195 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:45:13,196 INFO L229 MonitoredProcess]: Starting monitored process 78 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:45:13,196 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Waiting until timeout for monitored process [2022-01-18 15:45:13,225 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 15:45:13,226 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:45:13,226 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 23 conjunts are in the unsatisfiable core [2022-01-18 15:45:13,226 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:45:13,304 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:45:13,304 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2022-01-18 15:45:13,442 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:45:13,442 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:45:13,591 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:45:13,591 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [570550645] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:45:13,592 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:45:13,592 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 9] total 18 [2022-01-18 15:45:13,592 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [180485581] [2022-01-18 15:45:13,592 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:45:13,592 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-18 15:45:13,592 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:45:13,592 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-18 15:45:13,592 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=267, Unknown=0, NotChecked=0, Total=342 [2022-01-18 15:45:13,592 INFO L87 Difference]: Start difference. First operand 2531 states and 11435 transitions. Second operand has 19 states, 19 states have (on average 3.1052631578947367) internal successors, (59), 18 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:45:13,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:45:13,934 INFO L93 Difference]: Finished difference Result 2757 states and 12227 transitions. [2022-01-18 15:45:13,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-18 15:45:13,934 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.1052631578947367) internal successors, (59), 18 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 29 [2022-01-18 15:45:13,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:45:13,941 INFO L225 Difference]: With dead ends: 2757 [2022-01-18 15:45:13,941 INFO L226 Difference]: Without dead ends: 2744 [2022-01-18 15:45:13,941 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 45 SyntacticMatches, 4 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=123, Invalid=383, Unknown=0, NotChecked=0, Total=506 [2022-01-18 15:45:13,941 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 184 mSDsluCounter, 590 mSDsCounter, 0 mSdLazyCounter, 824 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 184 SdHoareTripleChecker+Valid, 244 SdHoareTripleChecker+Invalid, 828 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 824 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 15:45:13,941 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [184 Valid, 244 Invalid, 828 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 824 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 15:45:13,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2744 states. [2022-01-18 15:45:13,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2744 to 2531. [2022-01-18 15:45:13,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2531 states, 2530 states have (on average 4.518577075098814) internal successors, (11432), 2530 states have internal predecessors, (11432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:45:13,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2531 states to 2531 states and 11432 transitions. [2022-01-18 15:45:13,979 INFO L78 Accepts]: Start accepts. Automaton has 2531 states and 11432 transitions. Word has length 29 [2022-01-18 15:45:13,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:45:13,979 INFO L470 AbstractCegarLoop]: Abstraction has 2531 states and 11432 transitions. [2022-01-18 15:45:13,980 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.1052631578947367) internal successors, (59), 18 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:45:13,980 INFO L276 IsEmpty]: Start isEmpty. Operand 2531 states and 11432 transitions. [2022-01-18 15:45:13,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-01-18 15:45:13,983 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:45:13,984 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:45:13,999 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Ended with exit code 0 [2022-01-18 15:45:14,184 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,78 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:45:14,184 INFO L402 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-01-18 15:45:14,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:45:14,184 INFO L85 PathProgramCache]: Analyzing trace with hash 294635977, now seen corresponding path program 13 times [2022-01-18 15:45:14,184 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:45:14,184 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [278196144] [2022-01-18 15:45:14,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:45:14,185 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:45:14,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:45:14,296 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:45:14,296 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:45:14,296 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [278196144] [2022-01-18 15:45:14,297 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [278196144] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:45:14,297 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [148038101] [2022-01-18 15:45:14,297 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 15:45:14,297 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:45:14,297 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:45:14,298 INFO L229 MonitoredProcess]: Starting monitored process 79 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:45:14,298 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Waiting until timeout for monitored process [2022-01-18 15:45:14,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:45:14,330 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2022-01-18 15:45:14,330 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:45:14,455 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-01-18 15:45:14,571 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:45:14,572 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:45:14,693 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:45:14,693 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 22 [2022-01-18 15:45:14,701 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:45:14,701 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 7 [2022-01-18 15:45:14,729 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:45:14,729 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [148038101] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:45:14,729 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:45:14,729 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 20 [2022-01-18 15:45:14,729 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [846081730] [2022-01-18 15:45:14,729 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:45:14,729 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 15:45:14,729 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:45:14,729 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 15:45:14,729 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=347, Unknown=0, NotChecked=0, Total=420 [2022-01-18 15:45:14,729 INFO L87 Difference]: Start difference. First operand 2531 states and 11432 transitions. Second operand has 21 states, 21 states have (on average 3.619047619047619) internal successors, (76), 20 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:45:15,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:45:15,589 INFO L93 Difference]: Finished difference Result 3306 states and 14104 transitions. [2022-01-18 15:45:15,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-01-18 15:45:15,589 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.619047619047619) internal successors, (76), 20 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-01-18 15:45:15,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:45:15,596 INFO L225 Difference]: With dead ends: 3306 [2022-01-18 15:45:15,596 INFO L226 Difference]: Without dead ends: 3263 [2022-01-18 15:45:15,597 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 44 SyntacticMatches, 3 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 348 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=257, Invalid=1149, Unknown=0, NotChecked=0, Total=1406 [2022-01-18 15:45:15,597 INFO L933 BasicCegarLoop]: 43 mSDtfsCounter, 508 mSDsluCounter, 1080 mSDsCounter, 0 mSdLazyCounter, 1367 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 508 SdHoareTripleChecker+Valid, 458 SdHoareTripleChecker+Invalid, 1431 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 1367 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 15:45:15,597 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [508 Valid, 458 Invalid, 1431 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 1367 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-18 15:45:15,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3263 states. [2022-01-18 15:45:15,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3263 to 2477. [2022-01-18 15:45:15,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2477 states, 2476 states have (on average 4.520193861066236) internal successors, (11192), 2476 states have internal predecessors, (11192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:45:15,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2477 states to 2477 states and 11192 transitions. [2022-01-18 15:45:15,635 INFO L78 Accepts]: Start accepts. Automaton has 2477 states and 11192 transitions. Word has length 29 [2022-01-18 15:45:15,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:45:15,635 INFO L470 AbstractCegarLoop]: Abstraction has 2477 states and 11192 transitions. [2022-01-18 15:45:15,635 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.619047619047619) internal successors, (76), 20 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:45:15,635 INFO L276 IsEmpty]: Start isEmpty. Operand 2477 states and 11192 transitions. [2022-01-18 15:45:15,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-01-18 15:45:15,638 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:45:15,638 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:45:15,656 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 15:45:15,839 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,79 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:45:15,839 INFO L402 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-01-18 15:45:15,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:45:15,839 INFO L85 PathProgramCache]: Analyzing trace with hash -565478263, now seen corresponding path program 14 times [2022-01-18 15:45:15,839 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:45:15,839 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1518490247] [2022-01-18 15:45:15,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:45:15,839 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:45:15,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:45:15,937 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:45:15,937 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:45:15,937 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1518490247] [2022-01-18 15:45:15,937 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1518490247] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:45:15,937 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1251196496] [2022-01-18 15:45:15,937 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 15:45:15,937 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:45:15,937 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:45:15,938 INFO L229 MonitoredProcess]: Starting monitored process 80 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:45:15,944 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Waiting until timeout for monitored process [2022-01-18 15:45:15,971 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:45:15,972 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:45:15,972 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2022-01-18 15:45:15,973 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:45:16,111 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-01-18 15:45:16,238 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:45:16,239 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:45:16,379 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:45:16,379 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 22 [2022-01-18 15:45:16,389 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:45:16,389 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 7 [2022-01-18 15:45:16,420 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:45:16,420 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1251196496] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:45:16,420 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:45:16,420 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 21 [2022-01-18 15:45:16,420 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2087175136] [2022-01-18 15:45:16,420 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:45:16,420 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 15:45:16,421 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:45:16,421 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 15:45:16,421 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=401, Unknown=0, NotChecked=0, Total=462 [2022-01-18 15:45:16,421 INFO L87 Difference]: Start difference. First operand 2477 states and 11192 transitions. Second operand has 22 states, 22 states have (on average 3.4545454545454546) internal successors, (76), 21 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:45:17,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:45:17,677 INFO L93 Difference]: Finished difference Result 3069 states and 13302 transitions. [2022-01-18 15:45:17,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-01-18 15:45:17,678 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.4545454545454546) internal successors, (76), 21 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-01-18 15:45:17,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:45:17,684 INFO L225 Difference]: With dead ends: 3069 [2022-01-18 15:45:17,685 INFO L226 Difference]: Without dead ends: 3039 [2022-01-18 15:45:17,685 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 43 SyntacticMatches, 3 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 353 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=198, Invalid=1362, Unknown=0, NotChecked=0, Total=1560 [2022-01-18 15:45:17,685 INFO L933 BasicCegarLoop]: 47 mSDtfsCounter, 331 mSDsluCounter, 1734 mSDsCounter, 0 mSdLazyCounter, 2203 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 331 SdHoareTripleChecker+Valid, 714 SdHoareTripleChecker+Invalid, 2254 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 2203 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-18 15:45:17,685 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [331 Valid, 714 Invalid, 2254 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 2203 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-18 15:45:17,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3039 states. [2022-01-18 15:45:17,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3039 to 2486. [2022-01-18 15:45:17,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2486 states, 2485 states have (on average 4.513480885311871) internal successors, (11216), 2485 states have internal predecessors, (11216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:45:17,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2486 states to 2486 states and 11216 transitions. [2022-01-18 15:45:17,721 INFO L78 Accepts]: Start accepts. Automaton has 2486 states and 11216 transitions. Word has length 29 [2022-01-18 15:45:17,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:45:17,721 INFO L470 AbstractCegarLoop]: Abstraction has 2486 states and 11216 transitions. [2022-01-18 15:45:17,721 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 3.4545454545454546) internal successors, (76), 21 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:45:17,721 INFO L276 IsEmpty]: Start isEmpty. Operand 2486 states and 11216 transitions. [2022-01-18 15:45:17,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-01-18 15:45:17,725 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:45:17,725 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:45:17,747 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 15:45:17,925 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,SelfDestructingSolverStorable83 [2022-01-18 15:45:17,925 INFO L402 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-01-18 15:45:17,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:45:17,925 INFO L85 PathProgramCache]: Analyzing trace with hash -1979344029, now seen corresponding path program 6 times [2022-01-18 15:45:17,926 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:45:17,926 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2003360152] [2022-01-18 15:45:17,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:45:17,926 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:45:17,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:45:18,020 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:45:18,020 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:45:18,020 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2003360152] [2022-01-18 15:45:18,020 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2003360152] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:45:18,020 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1036617254] [2022-01-18 15:45:18,021 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 15:45:18,021 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:45:18,021 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:45:18,021 INFO L229 MonitoredProcess]: Starting monitored process 81 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:45:18,022 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Waiting until timeout for monitored process [2022-01-18 15:45:18,050 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 15:45:18,050 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:45:18,050 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 23 conjunts are in the unsatisfiable core [2022-01-18 15:45:18,051 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:45:18,119 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:45:18,120 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2022-01-18 15:45:18,272 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:45:18,273 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:45:18,417 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:45:18,417 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1036617254] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:45:18,417 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:45:18,417 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 18 [2022-01-18 15:45:18,417 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1131135872] [2022-01-18 15:45:18,417 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:45:18,417 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-18 15:45:18,418 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:45:18,418 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-18 15:45:18,418 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=274, Unknown=0, NotChecked=0, Total=342 [2022-01-18 15:45:18,418 INFO L87 Difference]: Start difference. First operand 2486 states and 11216 transitions. Second operand has 19 states, 19 states have (on average 2.736842105263158) internal successors, (52), 18 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:45:18,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:45:18,824 INFO L93 Difference]: Finished difference Result 2894 states and 12763 transitions. [2022-01-18 15:45:18,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-18 15:45:18,824 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.736842105263158) internal successors, (52), 18 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 29 [2022-01-18 15:45:18,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:45:18,831 INFO L225 Difference]: With dead ends: 2894 [2022-01-18 15:45:18,834 INFO L226 Difference]: Without dead ends: 2875 [2022-01-18 15:45:18,834 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 45 SyntacticMatches, 4 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 164 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=138, Invalid=462, Unknown=0, NotChecked=0, Total=600 [2022-01-18 15:45:18,834 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 225 mSDsluCounter, 589 mSDsCounter, 0 mSdLazyCounter, 869 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 225 SdHoareTripleChecker+Valid, 238 SdHoareTripleChecker+Invalid, 874 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 869 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 15:45:18,834 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [225 Valid, 238 Invalid, 874 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 869 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 15:45:18,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2875 states. [2022-01-18 15:45:18,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2875 to 2540. [2022-01-18 15:45:18,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2540 states, 2539 states have (on average 4.508467900748326) internal successors, (11447), 2539 states have internal predecessors, (11447), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:45:18,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2540 states to 2540 states and 11447 transitions. [2022-01-18 15:45:18,872 INFO L78 Accepts]: Start accepts. Automaton has 2540 states and 11447 transitions. Word has length 29 [2022-01-18 15:45:18,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:45:18,872 INFO L470 AbstractCegarLoop]: Abstraction has 2540 states and 11447 transitions. [2022-01-18 15:45:18,872 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.736842105263158) internal successors, (52), 18 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:45:18,872 INFO L276 IsEmpty]: Start isEmpty. Operand 2540 states and 11447 transitions. [2022-01-18 15:45:18,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-01-18 15:45:18,876 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:45:18,876 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:45:18,891 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 15:45:19,076 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84,81 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:45:19,076 INFO L402 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-01-18 15:45:19,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:45:19,077 INFO L85 PathProgramCache]: Analyzing trace with hash -556989203, now seen corresponding path program 7 times [2022-01-18 15:45:19,077 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:45:19,077 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [618340861] [2022-01-18 15:45:19,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:45:19,077 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:45:19,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:45:19,161 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:45:19,162 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:45:19,162 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [618340861] [2022-01-18 15:45:19,162 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [618340861] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:45:19,162 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1632937020] [2022-01-18 15:45:19,162 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 15:45:19,162 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:45:19,162 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:45:19,163 INFO L229 MonitoredProcess]: Starting monitored process 82 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:45:19,163 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Waiting until timeout for monitored process [2022-01-18 15:45:19,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:45:19,191 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2022-01-18 15:45:19,192 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:45:19,301 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-01-18 15:45:19,420 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:45:19,420 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:45:19,549 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:45:19,550 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 22 [2022-01-18 15:45:19,557 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:45:19,558 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 7 [2022-01-18 15:45:19,585 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:45:19,585 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1632937020] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:45:19,585 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:45:19,585 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 19 [2022-01-18 15:45:19,585 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1446061534] [2022-01-18 15:45:19,585 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:45:19,585 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 15:45:19,585 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:45:19,585 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 15:45:19,586 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=311, Unknown=0, NotChecked=0, Total=380 [2022-01-18 15:45:19,586 INFO L87 Difference]: Start difference. First operand 2540 states and 11447 transitions. Second operand has 20 states, 20 states have (on average 3.7) internal successors, (74), 19 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:45:20,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:45:20,271 INFO L93 Difference]: Finished difference Result 3497 states and 14957 transitions. [2022-01-18 15:45:20,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-01-18 15:45:20,272 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.7) internal successors, (74), 19 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-01-18 15:45:20,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:45:20,280 INFO L225 Difference]: With dead ends: 3497 [2022-01-18 15:45:20,280 INFO L226 Difference]: Without dead ends: 3469 [2022-01-18 15:45:20,280 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 45 SyntacticMatches, 3 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 250 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=202, Invalid=854, Unknown=0, NotChecked=0, Total=1056 [2022-01-18 15:45:20,280 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 377 mSDsluCounter, 961 mSDsCounter, 0 mSdLazyCounter, 1242 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 377 SdHoareTripleChecker+Valid, 382 SdHoareTripleChecker+Invalid, 1273 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 1242 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 15:45:20,280 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [377 Valid, 382 Invalid, 1273 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 1242 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-18 15:45:20,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3469 states. [2022-01-18 15:45:20,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3469 to 2669. [2022-01-18 15:45:20,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2669 states, 2668 states have (on average 4.508620689655173) internal successors, (12029), 2668 states have internal predecessors, (12029), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:45:20,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2669 states to 2669 states and 12029 transitions. [2022-01-18 15:45:20,328 INFO L78 Accepts]: Start accepts. Automaton has 2669 states and 12029 transitions. Word has length 29 [2022-01-18 15:45:20,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:45:20,329 INFO L470 AbstractCegarLoop]: Abstraction has 2669 states and 12029 transitions. [2022-01-18 15:45:20,329 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.7) internal successors, (74), 19 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:45:20,329 INFO L276 IsEmpty]: Start isEmpty. Operand 2669 states and 12029 transitions. [2022-01-18 15:45:20,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-01-18 15:45:20,334 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:45:20,335 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:45:20,350 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Ended with exit code 0 [2022-01-18 15:45:20,535 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85,82 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:45:20,535 INFO L402 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-01-18 15:45:20,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:45:20,535 INFO L85 PathProgramCache]: Analyzing trace with hash -156115671, now seen corresponding path program 8 times [2022-01-18 15:45:20,536 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:45:20,536 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1818721321] [2022-01-18 15:45:20,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:45:20,536 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:45:20,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:45:20,624 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:45:20,624 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:45:20,624 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1818721321] [2022-01-18 15:45:20,624 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1818721321] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:45:20,625 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [719180237] [2022-01-18 15:45:20,625 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 15:45:20,625 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:45:20,625 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:45:20,626 INFO L229 MonitoredProcess]: Starting monitored process 83 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:45:20,626 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Waiting until timeout for monitored process [2022-01-18 15:45:20,654 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:45:20,654 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:45:20,655 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2022-01-18 15:45:20,655 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:45:20,759 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:45:20,759 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2022-01-18 15:45:20,950 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:45:20,950 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:45:21,090 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:45:21,090 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [719180237] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:45:21,090 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:45:21,090 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 9] total 19 [2022-01-18 15:45:21,090 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2052040032] [2022-01-18 15:45:21,090 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:45:21,090 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 15:45:21,090 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:45:21,091 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 15:45:21,091 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=308, Unknown=0, NotChecked=0, Total=380 [2022-01-18 15:45:21,091 INFO L87 Difference]: Start difference. First operand 2669 states and 12029 transitions. Second operand has 20 states, 20 states have (on average 2.9) internal successors, (58), 19 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 15:45:21,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:45:21,549 INFO L93 Difference]: Finished difference Result 2976 states and 13095 transitions. [2022-01-18 15:45:21,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-01-18 15:45:21,550 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.9) internal successors, (58), 19 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 29 [2022-01-18 15:45:21,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:45:21,556 INFO L225 Difference]: With dead ends: 2976 [2022-01-18 15:45:21,556 INFO L226 Difference]: Without dead ends: 2953 [2022-01-18 15:45:21,556 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 45 SyntacticMatches, 3 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 194 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=172, Invalid=584, Unknown=0, NotChecked=0, Total=756 [2022-01-18 15:45:21,557 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 281 mSDsluCounter, 685 mSDsCounter, 0 mSdLazyCounter, 929 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 281 SdHoareTripleChecker+Valid, 268 SdHoareTripleChecker+Invalid, 944 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 929 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 15:45:21,557 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [281 Valid, 268 Invalid, 944 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 929 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 15:45:21,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2953 states. [2022-01-18 15:45:21,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2953 to 2597. [2022-01-18 15:45:21,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2597 states, 2596 states have (on average 4.510015408320493) internal successors, (11708), 2596 states have internal predecessors, (11708), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:45:21,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2597 states to 2597 states and 11708 transitions. [2022-01-18 15:45:21,594 INFO L78 Accepts]: Start accepts. Automaton has 2597 states and 11708 transitions. Word has length 29 [2022-01-18 15:45:21,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:45:21,594 INFO L470 AbstractCegarLoop]: Abstraction has 2597 states and 11708 transitions. [2022-01-18 15:45:21,594 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.9) internal successors, (58), 19 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 15:45:21,594 INFO L276 IsEmpty]: Start isEmpty. Operand 2597 states and 11708 transitions. [2022-01-18 15:45:21,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-01-18 15:45:21,598 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:45:21,598 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:45:21,613 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Ended with exit code 0 [2022-01-18 15:45:21,798 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,SelfDestructingSolverStorable86 [2022-01-18 15:45:21,799 INFO L402 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-01-18 15:45:21,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:45:21,799 INFO L85 PathProgramCache]: Analyzing trace with hash 1075204841, now seen corresponding path program 9 times [2022-01-18 15:45:21,799 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:45:21,799 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1323256021] [2022-01-18 15:45:21,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:45:21,799 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:45:21,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:45:21,901 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:45:21,902 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:45:21,902 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1323256021] [2022-01-18 15:45:21,902 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1323256021] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:45:21,902 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1387378557] [2022-01-18 15:45:21,902 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 15:45:21,902 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:45:21,902 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:45:21,903 INFO L229 MonitoredProcess]: Starting monitored process 84 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:45:21,904 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Waiting until timeout for monitored process [2022-01-18 15:45:21,933 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 15:45:21,933 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:45:21,934 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 23 conjunts are in the unsatisfiable core [2022-01-18 15:45:21,934 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:45:22,021 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:45:22,022 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2022-01-18 15:45:22,178 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:45:22,178 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:45:22,325 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:45:22,325 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1387378557] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:45:22,325 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:45:22,325 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 18 [2022-01-18 15:45:22,325 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [904164567] [2022-01-18 15:45:22,325 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:45:22,325 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-18 15:45:22,325 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:45:22,325 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-18 15:45:22,326 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2022-01-18 15:45:22,326 INFO L87 Difference]: Start difference. First operand 2597 states and 11708 transitions. Second operand has 19 states, 19 states have (on average 2.8421052631578947) internal successors, (54), 18 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:45:22,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:45:22,700 INFO L93 Difference]: Finished difference Result 2734 states and 12196 transitions. [2022-01-18 15:45:22,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-18 15:45:22,700 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.8421052631578947) internal successors, (54), 18 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-01-18 15:45:22,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:45:22,706 INFO L225 Difference]: With dead ends: 2734 [2022-01-18 15:45:22,707 INFO L226 Difference]: Without dead ends: 2719 [2022-01-18 15:45:22,707 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 45 SyntacticMatches, 4 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=81, Invalid=425, Unknown=0, NotChecked=0, Total=506 [2022-01-18 15:45:22,707 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 73 mSDsluCounter, 670 mSDsCounter, 0 mSdLazyCounter, 960 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 288 SdHoareTripleChecker+Invalid, 960 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 960 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 15:45:22,707 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [73 Valid, 288 Invalid, 960 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 960 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 15:45:22,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2719 states. [2022-01-18 15:45:22,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2719 to 2597. [2022-01-18 15:45:22,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2597 states, 2596 states have (on average 4.510015408320493) internal successors, (11708), 2596 states have internal predecessors, (11708), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:45:22,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2597 states to 2597 states and 11708 transitions. [2022-01-18 15:45:22,742 INFO L78 Accepts]: Start accepts. Automaton has 2597 states and 11708 transitions. Word has length 29 [2022-01-18 15:45:22,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:45:22,742 INFO L470 AbstractCegarLoop]: Abstraction has 2597 states and 11708 transitions. [2022-01-18 15:45:22,743 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.8421052631578947) internal successors, (54), 18 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:45:22,743 INFO L276 IsEmpty]: Start isEmpty. Operand 2597 states and 11708 transitions. [2022-01-18 15:45:22,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-01-18 15:45:22,747 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:45:22,747 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:45:22,762 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 15:45:22,947 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87,84 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:45:22,947 INFO L402 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-01-18 15:45:22,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:45:22,947 INFO L85 PathProgramCache]: Analyzing trace with hash -558108055, now seen corresponding path program 10 times [2022-01-18 15:45:22,947 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:45:22,947 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [730460257] [2022-01-18 15:45:22,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:45:22,948 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:45:22,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:45:23,035 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:45:23,036 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:45:23,036 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [730460257] [2022-01-18 15:45:23,036 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [730460257] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:45:23,036 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1633871774] [2022-01-18 15:45:23,036 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 15:45:23,036 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:45:23,036 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:45:23,037 INFO L229 MonitoredProcess]: Starting monitored process 85 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:45:23,038 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Waiting until timeout for monitored process [2022-01-18 15:45:23,066 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 15:45:23,066 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:45:23,066 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2022-01-18 15:45:23,067 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:45:23,178 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-01-18 15:45:23,316 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:45:23,316 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:45:23,436 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:45:23,436 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 22 [2022-01-18 15:45:23,444 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:45:23,444 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 7 [2022-01-18 15:45:23,472 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:45:23,472 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1633871774] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:45:23,472 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:45:23,472 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 19 [2022-01-18 15:45:23,473 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [672367711] [2022-01-18 15:45:23,473 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:45:23,475 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 15:45:23,475 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:45:23,475 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 15:45:23,475 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=317, Unknown=0, NotChecked=0, Total=380 [2022-01-18 15:45:23,475 INFO L87 Difference]: Start difference. First operand 2597 states and 11708 transitions. Second operand has 20 states, 20 states have (on average 3.65) internal successors, (73), 19 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:45:24,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:45:24,199 INFO L93 Difference]: Finished difference Result 3239 states and 14015 transitions. [2022-01-18 15:45:24,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-01-18 15:45:24,199 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.65) internal successors, (73), 19 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-01-18 15:45:24,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:45:24,207 INFO L225 Difference]: With dead ends: 3239 [2022-01-18 15:45:24,207 INFO L226 Difference]: Without dead ends: 3215 [2022-01-18 15:45:24,208 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 45 SyntacticMatches, 3 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=162, Invalid=830, Unknown=0, NotChecked=0, Total=992 [2022-01-18 15:45:24,208 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 382 mSDsluCounter, 987 mSDsCounter, 0 mSdLazyCounter, 1264 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 382 SdHoareTripleChecker+Valid, 412 SdHoareTripleChecker+Invalid, 1322 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 1264 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 15:45:24,208 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [382 Valid, 412 Invalid, 1322 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 1264 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-18 15:45:24,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3215 states. [2022-01-18 15:45:24,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3215 to 2590. [2022-01-18 15:45:24,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2590 states, 2589 states have (on average 4.511780610274237) internal successors, (11681), 2589 states have internal predecessors, (11681), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:45:24,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2590 states to 2590 states and 11681 transitions. [2022-01-18 15:45:24,269 INFO L78 Accepts]: Start accepts. Automaton has 2590 states and 11681 transitions. Word has length 29 [2022-01-18 15:45:24,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:45:24,269 INFO L470 AbstractCegarLoop]: Abstraction has 2590 states and 11681 transitions. [2022-01-18 15:45:24,269 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.65) internal successors, (73), 19 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:45:24,269 INFO L276 IsEmpty]: Start isEmpty. Operand 2590 states and 11681 transitions. [2022-01-18 15:45:24,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-01-18 15:45:24,273 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:45:24,273 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:45:24,289 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 15:45:24,474 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88,85 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:45:24,474 INFO L402 AbstractCegarLoop]: === Iteration 90 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-01-18 15:45:24,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:45:24,474 INFO L85 PathProgramCache]: Analyzing trace with hash -731434137, now seen corresponding path program 11 times [2022-01-18 15:45:24,475 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:45:24,475 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [735922672] [2022-01-18 15:45:24,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:45:24,475 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:45:24,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:45:24,596 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:45:24,597 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:45:24,597 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [735922672] [2022-01-18 15:45:24,597 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [735922672] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:45:24,597 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1543893237] [2022-01-18 15:45:24,597 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 15:45:24,597 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:45:24,597 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:45:24,598 INFO L229 MonitoredProcess]: Starting monitored process 86 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:45:24,626 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Waiting until timeout for monitored process [2022-01-18 15:45:24,633 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 15:45:24,633 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:45:24,634 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2022-01-18 15:45:24,635 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:45:24,751 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-01-18 15:45:24,882 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:45:24,883 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:45:25,021 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:45:25,021 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 22 [2022-01-18 15:45:25,029 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:45:25,030 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 7 [2022-01-18 15:45:25,058 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:45:25,058 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1543893237] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:45:25,058 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:45:25,058 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 20 [2022-01-18 15:45:25,058 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1242509682] [2022-01-18 15:45:25,058 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:45:25,058 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 15:45:25,058 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:45:25,058 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 15:45:25,059 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=347, Unknown=0, NotChecked=0, Total=420 [2022-01-18 15:45:25,059 INFO L87 Difference]: Start difference. First operand 2590 states and 11681 transitions. Second operand has 21 states, 21 states have (on average 3.7142857142857144) internal successors, (78), 20 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:45:25,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:45:25,953 INFO L93 Difference]: Finished difference Result 3767 states and 15975 transitions. [2022-01-18 15:45:25,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-01-18 15:45:25,954 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.7142857142857144) internal successors, (78), 20 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-01-18 15:45:25,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:45:25,962 INFO L225 Difference]: With dead ends: 3767 [2022-01-18 15:45:25,962 INFO L226 Difference]: Without dead ends: 3729 [2022-01-18 15:45:25,962 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 44 SyntacticMatches, 3 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 353 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=258, Invalid=1148, Unknown=0, NotChecked=0, Total=1406 [2022-01-18 15:45:25,963 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 509 mSDsluCounter, 1117 mSDsCounter, 0 mSdLazyCounter, 1463 mSolverCounterSat, 70 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 509 SdHoareTripleChecker+Valid, 428 SdHoareTripleChecker+Invalid, 1533 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 1463 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 15:45:25,963 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [509 Valid, 428 Invalid, 1533 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [70 Valid, 1463 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-18 15:45:25,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3729 states. [2022-01-18 15:45:26,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3729 to 2764. [2022-01-18 15:45:26,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2764 states, 2763 states have (on average 4.509952949692363) internal successors, (12461), 2763 states have internal predecessors, (12461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:45:26,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2764 states to 2764 states and 12461 transitions. [2022-01-18 15:45:26,010 INFO L78 Accepts]: Start accepts. Automaton has 2764 states and 12461 transitions. Word has length 29 [2022-01-18 15:45:26,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:45:26,010 INFO L470 AbstractCegarLoop]: Abstraction has 2764 states and 12461 transitions. [2022-01-18 15:45:26,011 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.7142857142857144) internal successors, (78), 20 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:45:26,011 INFO L276 IsEmpty]: Start isEmpty. Operand 2764 states and 12461 transitions. [2022-01-18 15:45:26,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-01-18 15:45:26,015 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:45:26,015 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:45:26,031 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 15:45:26,215 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,SelfDestructingSolverStorable89 [2022-01-18 15:45:26,216 INFO L402 AbstractCegarLoop]: === Iteration 91 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-01-18 15:45:26,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:45:26,216 INFO L85 PathProgramCache]: Analyzing trace with hash 690920689, now seen corresponding path program 12 times [2022-01-18 15:45:26,216 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:45:26,216 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [784558231] [2022-01-18 15:45:26,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:45:26,216 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:45:26,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:45:26,306 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:45:26,306 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:45:26,306 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [784558231] [2022-01-18 15:45:26,307 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [784558231] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:45:26,307 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1275629589] [2022-01-18 15:45:26,307 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 15:45:26,307 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:45:26,307 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:45:26,308 INFO L229 MonitoredProcess]: Starting monitored process 87 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:45:26,308 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Waiting until timeout for monitored process [2022-01-18 15:45:26,339 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 15:45:26,339 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:45:26,339 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 23 conjunts are in the unsatisfiable core [2022-01-18 15:45:26,340 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:45:26,408 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:45:26,408 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2022-01-18 15:45:26,549 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:45:26,549 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:45:26,688 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:45:26,688 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1275629589] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:45:26,688 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:45:26,688 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 9] total 18 [2022-01-18 15:45:26,688 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1537750290] [2022-01-18 15:45:26,688 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:45:26,688 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-18 15:45:26,688 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:45:26,688 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-18 15:45:26,688 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=267, Unknown=0, NotChecked=0, Total=342 [2022-01-18 15:45:26,689 INFO L87 Difference]: Start difference. First operand 2764 states and 12461 transitions. Second operand has 19 states, 19 states have (on average 3.0) internal successors, (57), 18 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 15:45:26,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:45:26,990 INFO L93 Difference]: Finished difference Result 3113 states and 13640 transitions. [2022-01-18 15:45:26,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-18 15:45:26,990 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.0) internal successors, (57), 18 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 29 [2022-01-18 15:45:26,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:45:26,997 INFO L225 Difference]: With dead ends: 3113 [2022-01-18 15:45:26,997 INFO L226 Difference]: Without dead ends: 3100 [2022-01-18 15:45:26,997 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 45 SyntacticMatches, 4 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=123, Invalid=383, Unknown=0, NotChecked=0, Total=506 [2022-01-18 15:45:26,998 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 194 mSDsluCounter, 458 mSDsCounter, 0 mSdLazyCounter, 663 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 194 SdHoareTripleChecker+Valid, 191 SdHoareTripleChecker+Invalid, 667 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 663 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:45:26,998 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [194 Valid, 191 Invalid, 667 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 663 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:45:27,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3100 states. [2022-01-18 15:45:27,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3100 to 2764. [2022-01-18 15:45:27,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2764 states, 2763 states have (on average 4.508867173362288) internal successors, (12458), 2763 states have internal predecessors, (12458), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:45:27,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2764 states to 2764 states and 12458 transitions. [2022-01-18 15:45:27,038 INFO L78 Accepts]: Start accepts. Automaton has 2764 states and 12458 transitions. Word has length 29 [2022-01-18 15:45:27,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:45:27,038 INFO L470 AbstractCegarLoop]: Abstraction has 2764 states and 12458 transitions. [2022-01-18 15:45:27,038 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.0) internal successors, (57), 18 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 15:45:27,038 INFO L276 IsEmpty]: Start isEmpty. Operand 2764 states and 12458 transitions. [2022-01-18 15:45:27,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-01-18 15:45:27,043 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:45:27,043 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:45:27,061 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Forceful destruction successful, exit code 0 [2022-01-18 15:45:27,243 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,87 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:45:27,243 INFO L402 AbstractCegarLoop]: === Iteration 92 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-01-18 15:45:27,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:45:27,243 INFO L85 PathProgramCache]: Analyzing trace with hash 245818669, now seen corresponding path program 13 times [2022-01-18 15:45:27,243 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:45:27,243 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2061459346] [2022-01-18 15:45:27,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:45:27,244 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:45:27,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:45:27,348 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:45:27,348 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:45:27,348 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2061459346] [2022-01-18 15:45:27,348 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2061459346] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:45:27,348 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [575977933] [2022-01-18 15:45:27,348 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 15:45:27,348 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:45:27,348 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:45:27,349 INFO L229 MonitoredProcess]: Starting monitored process 88 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:45:27,350 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Waiting until timeout for monitored process [2022-01-18 15:45:27,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:45:27,379 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2022-01-18 15:45:27,380 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:45:27,488 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-01-18 15:45:27,607 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:45:27,607 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:45:27,725 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:45:27,726 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 22 [2022-01-18 15:45:27,735 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:45:27,735 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 7 [2022-01-18 15:45:27,764 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:45:27,764 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [575977933] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:45:27,764 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:45:27,764 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 20 [2022-01-18 15:45:27,764 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1262939735] [2022-01-18 15:45:27,764 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:45:27,765 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 15:45:27,765 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:45:27,765 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 15:45:27,765 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=347, Unknown=0, NotChecked=0, Total=420 [2022-01-18 15:45:27,765 INFO L87 Difference]: Start difference. First operand 2764 states and 12458 transitions. Second operand has 21 states, 21 states have (on average 3.619047619047619) internal successors, (76), 20 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:45:28,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:45:28,565 INFO L93 Difference]: Finished difference Result 3696 states and 15794 transitions. [2022-01-18 15:45:28,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-01-18 15:45:28,566 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.619047619047619) internal successors, (76), 20 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-01-18 15:45:28,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:45:28,574 INFO L225 Difference]: With dead ends: 3696 [2022-01-18 15:45:28,574 INFO L226 Difference]: Without dead ends: 3650 [2022-01-18 15:45:28,574 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 44 SyntacticMatches, 3 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 348 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=257, Invalid=1149, Unknown=0, NotChecked=0, Total=1406 [2022-01-18 15:45:28,574 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 500 mSDsluCounter, 976 mSDsCounter, 0 mSdLazyCounter, 1229 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 500 SdHoareTripleChecker+Valid, 392 SdHoareTripleChecker+Invalid, 1296 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 1229 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 15:45:28,574 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [500 Valid, 392 Invalid, 1296 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 1229 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-18 15:45:28,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3650 states. [2022-01-18 15:45:28,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3650 to 2657. [2022-01-18 15:45:28,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2657 states, 2656 states have (on average 4.511295180722891) internal successors, (11982), 2656 states have internal predecessors, (11982), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:45:28,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2657 states to 2657 states and 11982 transitions. [2022-01-18 15:45:28,619 INFO L78 Accepts]: Start accepts. Automaton has 2657 states and 11982 transitions. Word has length 29 [2022-01-18 15:45:28,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:45:28,619 INFO L470 AbstractCegarLoop]: Abstraction has 2657 states and 11982 transitions. [2022-01-18 15:45:28,619 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.619047619047619) internal successors, (76), 20 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:45:28,619 INFO L276 IsEmpty]: Start isEmpty. Operand 2657 states and 11982 transitions. [2022-01-18 15:45:28,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-01-18 15:45:28,623 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:45:28,624 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:45:28,640 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 15:45:28,824 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91,88 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:45:28,824 INFO L402 AbstractCegarLoop]: === Iteration 93 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-01-18 15:45:28,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:45:28,824 INFO L85 PathProgramCache]: Analyzing trace with hash -892761565, now seen corresponding path program 14 times [2022-01-18 15:45:28,824 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:45:28,824 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [378605681] [2022-01-18 15:45:28,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:45:28,825 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:45:28,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:45:28,923 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:45:28,923 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:45:28,923 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [378605681] [2022-01-18 15:45:28,923 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [378605681] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:45:28,923 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1511937129] [2022-01-18 15:45:28,923 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 15:45:28,924 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:45:28,924 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:45:28,924 INFO L229 MonitoredProcess]: Starting monitored process 89 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:45:28,925 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Waiting until timeout for monitored process [2022-01-18 15:45:28,953 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:45:28,953 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:45:28,954 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2022-01-18 15:45:28,954 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:45:29,062 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:45:29,062 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2022-01-18 15:45:29,311 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:45:29,311 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:45:29,462 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:45:29,462 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1511937129] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:45:29,462 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:45:29,462 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 20 [2022-01-18 15:45:29,462 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [881075861] [2022-01-18 15:45:29,462 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:45:29,462 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 15:45:29,463 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:45:29,463 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 15:45:29,463 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=364, Unknown=0, NotChecked=0, Total=420 [2022-01-18 15:45:29,463 INFO L87 Difference]: Start difference. First operand 2657 states and 11982 transitions. Second operand has 21 states, 21 states have (on average 2.857142857142857) internal successors, (60), 20 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:45:29,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:45:29,912 INFO L93 Difference]: Finished difference Result 2811 states and 12524 transitions. [2022-01-18 15:45:29,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-18 15:45:29,912 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.857142857142857) internal successors, (60), 20 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 29 [2022-01-18 15:45:29,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:45:29,918 INFO L225 Difference]: With dead ends: 2811 [2022-01-18 15:45:29,918 INFO L226 Difference]: Without dead ends: 2792 [2022-01-18 15:45:29,918 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 44 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=102, Invalid=600, Unknown=0, NotChecked=0, Total=702 [2022-01-18 15:45:29,918 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 137 mSDsluCounter, 732 mSDsCounter, 0 mSdLazyCounter, 1031 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 137 SdHoareTripleChecker+Valid, 300 SdHoareTripleChecker+Invalid, 1034 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 1031 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 15:45:29,919 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [137 Valid, 300 Invalid, 1034 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 1031 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 15:45:29,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2792 states. [2022-01-18 15:45:29,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2792 to 2636. [2022-01-18 15:45:29,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2636 states, 2635 states have (on average 4.516508538899431) internal successors, (11901), 2635 states have internal predecessors, (11901), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:45:29,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2636 states to 2636 states and 11901 transitions. [2022-01-18 15:45:29,955 INFO L78 Accepts]: Start accepts. Automaton has 2636 states and 11901 transitions. Word has length 29 [2022-01-18 15:45:29,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:45:29,955 INFO L470 AbstractCegarLoop]: Abstraction has 2636 states and 11901 transitions. [2022-01-18 15:45:29,955 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.857142857142857) internal successors, (60), 20 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:45:29,955 INFO L276 IsEmpty]: Start isEmpty. Operand 2636 states and 11901 transitions. [2022-01-18 15:45:29,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-01-18 15:45:29,959 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:45:29,959 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:45:29,975 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Forceful destruction successful, exit code 0 [2022-01-18 15:45:30,159 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,89 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:45:30,160 INFO L402 AbstractCegarLoop]: === Iteration 94 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-01-18 15:45:30,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:45:30,160 INFO L85 PathProgramCache]: Analyzing trace with hash -1546865603, now seen corresponding path program 15 times [2022-01-18 15:45:30,160 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:45:30,160 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [37408051] [2022-01-18 15:45:30,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:45:30,160 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:45:30,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:45:30,254 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:45:30,254 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:45:30,254 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [37408051] [2022-01-18 15:45:30,255 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [37408051] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:45:30,255 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [35406168] [2022-01-18 15:45:30,255 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 15:45:30,255 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:45:30,255 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:45:30,256 INFO L229 MonitoredProcess]: Starting monitored process 90 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:45:30,256 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Waiting until timeout for monitored process [2022-01-18 15:45:30,285 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 15:45:30,285 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:45:30,286 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 23 conjunts are in the unsatisfiable core [2022-01-18 15:45:30,286 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:45:30,363 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:45:30,363 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2022-01-18 15:45:30,498 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:45:30,498 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:45:30,639 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:45:30,640 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [35406168] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:45:30,640 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:45:30,640 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 18 [2022-01-18 15:45:30,640 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1819301919] [2022-01-18 15:45:30,640 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:45:30,640 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-18 15:45:30,640 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:45:30,640 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-18 15:45:30,640 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=274, Unknown=0, NotChecked=0, Total=342 [2022-01-18 15:45:30,640 INFO L87 Difference]: Start difference. First operand 2636 states and 11901 transitions. Second operand has 19 states, 19 states have (on average 2.6842105263157894) internal successors, (51), 18 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:45:31,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:45:31,143 INFO L93 Difference]: Finished difference Result 3041 states and 13364 transitions. [2022-01-18 15:45:31,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-18 15:45:31,143 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.6842105263157894) internal successors, (51), 18 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-01-18 15:45:31,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:45:31,150 INFO L225 Difference]: With dead ends: 3041 [2022-01-18 15:45:31,150 INFO L226 Difference]: Without dead ends: 3022 [2022-01-18 15:45:31,150 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 45 SyntacticMatches, 4 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 164 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=138, Invalid=462, Unknown=0, NotChecked=0, Total=600 [2022-01-18 15:45:31,151 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 151 mSDsluCounter, 785 mSDsCounter, 0 mSdLazyCounter, 1126 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 151 SdHoareTripleChecker+Valid, 304 SdHoareTripleChecker+Invalid, 1130 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 1126 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 15:45:31,151 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [151 Valid, 304 Invalid, 1130 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 1126 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-18 15:45:31,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3022 states. [2022-01-18 15:45:31,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3022 to 2689. [2022-01-18 15:45:31,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2689 states, 2688 states have (on average 4.515625) internal successors, (12138), 2688 states have internal predecessors, (12138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:45:31,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2689 states to 2689 states and 12138 transitions. [2022-01-18 15:45:31,191 INFO L78 Accepts]: Start accepts. Automaton has 2689 states and 12138 transitions. Word has length 29 [2022-01-18 15:45:31,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:45:31,191 INFO L470 AbstractCegarLoop]: Abstraction has 2689 states and 12138 transitions. [2022-01-18 15:45:31,191 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.6842105263157894) internal successors, (51), 18 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:45:31,191 INFO L276 IsEmpty]: Start isEmpty. Operand 2689 states and 12138 transitions. [2022-01-18 15:45:31,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-01-18 15:45:31,195 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:45:31,195 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:45:31,212 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Ended with exit code 0 [2022-01-18 15:45:31,395 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,SelfDestructingSolverStorable93 [2022-01-18 15:45:31,396 INFO L402 AbstractCegarLoop]: === Iteration 95 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-01-18 15:45:31,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:45:31,396 INFO L85 PathProgramCache]: Analyzing trace with hash -243592997, now seen corresponding path program 16 times [2022-01-18 15:45:31,396 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:45:31,396 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1443504887] [2022-01-18 15:45:31,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:45:31,396 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:45:31,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:45:31,482 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:45:31,482 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:45:31,482 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1443504887] [2022-01-18 15:45:31,482 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1443504887] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:45:31,482 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1033239118] [2022-01-18 15:45:31,482 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 15:45:31,482 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:45:31,482 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:45:31,483 INFO L229 MonitoredProcess]: Starting monitored process 91 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:45:31,486 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Waiting until timeout for monitored process [2022-01-18 15:45:31,512 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 15:45:31,512 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:45:31,513 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2022-01-18 15:45:31,513 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:45:31,655 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-01-18 15:45:31,778 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:45:31,778 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:45:31,886 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:45:31,886 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 22 [2022-01-18 15:45:31,894 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:45:31,895 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 7 [2022-01-18 15:45:31,951 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:45:31,951 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1033239118] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:45:31,951 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:45:31,951 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 19 [2022-01-18 15:45:31,951 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [627830436] [2022-01-18 15:45:31,951 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:45:31,952 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 15:45:31,952 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:45:31,952 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 15:45:31,952 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=311, Unknown=0, NotChecked=0, Total=380 [2022-01-18 15:45:31,952 INFO L87 Difference]: Start difference. First operand 2689 states and 12138 transitions. Second operand has 20 states, 20 states have (on average 3.7) internal successors, (74), 19 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:45:32,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:45:32,722 INFO L93 Difference]: Finished difference Result 3583 states and 15392 transitions. [2022-01-18 15:45:32,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-01-18 15:45:32,722 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.7) internal successors, (74), 19 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-01-18 15:45:32,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:45:32,730 INFO L225 Difference]: With dead ends: 3583 [2022-01-18 15:45:32,731 INFO L226 Difference]: Without dead ends: 3555 [2022-01-18 15:45:32,731 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 45 SyntacticMatches, 3 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 237 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=189, Invalid=803, Unknown=0, NotChecked=0, Total=992 [2022-01-18 15:45:32,731 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 417 mSDsluCounter, 1093 mSDsCounter, 0 mSdLazyCounter, 1420 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 417 SdHoareTripleChecker+Valid, 424 SdHoareTripleChecker+Invalid, 1464 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 1420 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 15:45:32,731 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [417 Valid, 424 Invalid, 1464 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 1420 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-18 15:45:32,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3555 states. [2022-01-18 15:45:32,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3555 to 2783. [2022-01-18 15:45:32,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2783 states, 2782 states have (on average 4.524083393242272) internal successors, (12586), 2782 states have internal predecessors, (12586), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:45:32,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2783 states to 2783 states and 12586 transitions. [2022-01-18 15:45:32,781 INFO L78 Accepts]: Start accepts. Automaton has 2783 states and 12586 transitions. Word has length 29 [2022-01-18 15:45:32,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:45:32,781 INFO L470 AbstractCegarLoop]: Abstraction has 2783 states and 12586 transitions. [2022-01-18 15:45:32,782 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.7) internal successors, (74), 19 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:45:32,782 INFO L276 IsEmpty]: Start isEmpty. Operand 2783 states and 12586 transitions. [2022-01-18 15:45:32,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-01-18 15:45:32,786 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:45:32,786 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:45:32,802 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 15:45:32,987 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94,91 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:45:32,987 INFO L402 AbstractCegarLoop]: === Iteration 96 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-01-18 15:45:32,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:45:32,987 INFO L85 PathProgramCache]: Analyzing trace with hash -296979517, now seen corresponding path program 17 times [2022-01-18 15:45:32,987 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:45:32,987 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [508337151] [2022-01-18 15:45:32,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:45:32,987 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:45:32,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:45:33,072 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:45:33,072 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:45:33,072 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [508337151] [2022-01-18 15:45:33,072 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [508337151] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:45:33,073 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [929670268] [2022-01-18 15:45:33,073 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 15:45:33,073 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:45:33,073 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:45:33,074 INFO L229 MonitoredProcess]: Starting monitored process 92 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:45:33,074 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Waiting until timeout for monitored process [2022-01-18 15:45:33,102 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 15:45:33,102 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:45:33,102 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2022-01-18 15:45:33,103 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:45:33,230 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-01-18 15:45:33,350 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:45:33,350 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:45:33,451 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:45:33,452 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 22 [2022-01-18 15:45:33,460 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:45:33,460 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 7 [2022-01-18 15:45:33,512 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:45:33,512 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [929670268] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:45:33,512 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:45:33,512 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 19 [2022-01-18 15:45:33,512 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1155475455] [2022-01-18 15:45:33,512 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:45:33,512 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 15:45:33,512 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:45:33,513 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 15:45:33,513 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=311, Unknown=0, NotChecked=0, Total=380 [2022-01-18 15:45:33,513 INFO L87 Difference]: Start difference. First operand 2783 states and 12586 transitions. Second operand has 20 states, 20 states have (on average 3.65) internal successors, (73), 19 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:45:34,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:45:34,267 INFO L93 Difference]: Finished difference Result 3573 states and 15377 transitions. [2022-01-18 15:45:34,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-01-18 15:45:34,267 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.65) internal successors, (73), 19 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-01-18 15:45:34,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:45:34,275 INFO L225 Difference]: With dead ends: 3573 [2022-01-18 15:45:34,275 INFO L226 Difference]: Without dead ends: 3528 [2022-01-18 15:45:34,275 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 45 SyntacticMatches, 3 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 250 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=202, Invalid=854, Unknown=0, NotChecked=0, Total=1056 [2022-01-18 15:45:34,275 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 422 mSDsluCounter, 1047 mSDsCounter, 0 mSdLazyCounter, 1392 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 422 SdHoareTripleChecker+Valid, 425 SdHoareTripleChecker+Invalid, 1437 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 1392 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 15:45:34,275 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [422 Valid, 425 Invalid, 1437 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 1392 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-18 15:45:34,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3528 states. [2022-01-18 15:45:34,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3528 to 2746. [2022-01-18 15:45:34,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2746 states, 2745 states have (on average 4.523861566484517) internal successors, (12418), 2745 states have internal predecessors, (12418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:45:34,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2746 states to 2746 states and 12418 transitions. [2022-01-18 15:45:34,315 INFO L78 Accepts]: Start accepts. Automaton has 2746 states and 12418 transitions. Word has length 29 [2022-01-18 15:45:34,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:45:34,315 INFO L470 AbstractCegarLoop]: Abstraction has 2746 states and 12418 transitions. [2022-01-18 15:45:34,315 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.65) internal successors, (73), 19 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:45:34,316 INFO L276 IsEmpty]: Start isEmpty. Operand 2746 states and 12418 transitions. [2022-01-18 15:45:34,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-01-18 15:45:34,320 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:45:34,320 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:45:34,337 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Forceful destruction successful, exit code 0 [2022-01-18 15:45:34,520 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95,92 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:45:34,520 INFO L402 AbstractCegarLoop]: === Iteration 97 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-01-18 15:45:34,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:45:34,520 INFO L85 PathProgramCache]: Analyzing trace with hash -833520135, now seen corresponding path program 18 times [2022-01-18 15:45:34,520 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:45:34,520 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [36455334] [2022-01-18 15:45:34,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:45:34,521 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:45:34,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:45:34,617 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:45:34,618 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:45:34,618 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [36455334] [2022-01-18 15:45:34,618 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [36455334] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:45:34,618 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [583344874] [2022-01-18 15:45:34,618 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 15:45:34,618 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:45:34,618 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:45:34,619 INFO L229 MonitoredProcess]: Starting monitored process 93 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:45:34,619 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Waiting until timeout for monitored process [2022-01-18 15:45:34,649 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 15:45:34,649 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:45:34,650 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 31 conjunts are in the unsatisfiable core [2022-01-18 15:45:34,650 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:45:34,776 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-01-18 15:45:34,919 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:45:34,919 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:45:35,044 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:45:35,044 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 22 [2022-01-18 15:45:35,065 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:45:35,066 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 7 [2022-01-18 15:45:35,137 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 15:45:35,137 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [583344874] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:45:35,138 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:45:35,138 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 21 [2022-01-18 15:45:35,138 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1427851247] [2022-01-18 15:45:35,138 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:45:35,138 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 15:45:35,138 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:45:35,138 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 15:45:35,138 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=401, Unknown=0, NotChecked=0, Total=462 [2022-01-18 15:45:35,138 INFO L87 Difference]: Start difference. First operand 2746 states and 12418 transitions. Second operand has 22 states, 22 states have (on average 3.5454545454545454) internal successors, (78), 21 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:45:36,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:45:36,166 INFO L93 Difference]: Finished difference Result 3370 states and 14667 transitions. [2022-01-18 15:45:36,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-01-18 15:45:36,166 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.5454545454545454) internal successors, (78), 21 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-01-18 15:45:36,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:45:36,174 INFO L225 Difference]: With dead ends: 3370 [2022-01-18 15:45:36,174 INFO L226 Difference]: Without dead ends: 3332 [2022-01-18 15:45:36,174 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 43 SyntacticMatches, 3 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 352 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=198, Invalid=1362, Unknown=0, NotChecked=0, Total=1560 [2022-01-18 15:45:36,174 INFO L933 BasicCegarLoop]: 45 mSDtfsCounter, 405 mSDsluCounter, 1260 mSDsCounter, 0 mSdLazyCounter, 1688 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 405 SdHoareTripleChecker+Valid, 482 SdHoareTripleChecker+Invalid, 1745 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 1688 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 15:45:36,174 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [405 Valid, 482 Invalid, 1745 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 1688 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-18 15:45:36,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3332 states. [2022-01-18 15:45:36,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3332 to 2725. [2022-01-18 15:45:36,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2725 states, 2724 states have (on average 4.526431718061674) internal successors, (12330), 2724 states have internal predecessors, (12330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:45:36,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2725 states to 2725 states and 12330 transitions. [2022-01-18 15:45:36,215 INFO L78 Accepts]: Start accepts. Automaton has 2725 states and 12330 transitions. Word has length 29 [2022-01-18 15:45:36,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:45:36,215 INFO L470 AbstractCegarLoop]: Abstraction has 2725 states and 12330 transitions. [2022-01-18 15:45:36,215 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 3.5454545454545454) internal successors, (78), 21 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:45:36,215 INFO L276 IsEmpty]: Start isEmpty. Operand 2725 states and 12330 transitions. [2022-01-18 15:45:36,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-01-18 15:45:36,220 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:45:36,220 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:45:36,235 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Forceful destruction successful, exit code 0 [2022-01-18 15:45:36,420 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96,93 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:45:36,420 INFO L402 AbstractCegarLoop]: === Iteration 98 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-01-18 15:45:36,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:45:36,420 INFO L85 PathProgramCache]: Analyzing trace with hash 1508540217, now seen corresponding path program 19 times [2022-01-18 15:45:36,420 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:45:36,420 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [626969864] [2022-01-18 15:45:36,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:45:36,421 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:45:36,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:45:36,514 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:45:36,515 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:45:36,515 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [626969864] [2022-01-18 15:45:36,515 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [626969864] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:45:36,515 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1681734754] [2022-01-18 15:45:36,515 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 15:45:36,515 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:45:36,515 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:45:36,516 INFO L229 MonitoredProcess]: Starting monitored process 94 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:45:36,516 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Waiting until timeout for monitored process [2022-01-18 15:45:36,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:45:36,545 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2022-01-18 15:45:36,546 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:45:36,670 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-01-18 15:45:36,789 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:45:36,789 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:45:36,904 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:45:36,905 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 22 [2022-01-18 15:45:36,914 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:45:36,915 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 7 [2022-01-18 15:45:36,973 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:45:36,973 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1681734754] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:45:36,973 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:45:36,973 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 20 [2022-01-18 15:45:36,973 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [102578161] [2022-01-18 15:45:36,974 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:45:36,974 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 15:45:36,974 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:45:36,974 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 15:45:36,974 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=347, Unknown=0, NotChecked=0, Total=420 [2022-01-18 15:45:36,974 INFO L87 Difference]: Start difference. First operand 2725 states and 12330 transitions. Second operand has 21 states, 21 states have (on average 3.7142857142857144) internal successors, (78), 20 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:45:37,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:45:37,814 INFO L93 Difference]: Finished difference Result 3641 states and 15769 transitions. [2022-01-18 15:45:37,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-01-18 15:45:37,814 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.7142857142857144) internal successors, (78), 20 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-01-18 15:45:37,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:45:37,823 INFO L225 Difference]: With dead ends: 3641 [2022-01-18 15:45:37,823 INFO L226 Difference]: Without dead ends: 3603 [2022-01-18 15:45:37,823 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 44 SyntacticMatches, 3 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 346 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=257, Invalid=1149, Unknown=0, NotChecked=0, Total=1406 [2022-01-18 15:45:37,825 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 485 mSDsluCounter, 995 mSDsCounter, 0 mSdLazyCounter, 1346 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 485 SdHoareTripleChecker+Valid, 390 SdHoareTripleChecker+Invalid, 1402 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 1346 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 15:45:37,825 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [485 Valid, 390 Invalid, 1402 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 1346 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-18 15:45:37,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3603 states. [2022-01-18 15:45:37,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3603 to 2862. [2022-01-18 15:45:37,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2862 states, 2861 states have (on average 4.53163229639986) internal successors, (12965), 2861 states have internal predecessors, (12965), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:45:37,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2862 states to 2862 states and 12965 transitions. [2022-01-18 15:45:37,877 INFO L78 Accepts]: Start accepts. Automaton has 2862 states and 12965 transitions. Word has length 29 [2022-01-18 15:45:37,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:45:37,877 INFO L470 AbstractCegarLoop]: Abstraction has 2862 states and 12965 transitions. [2022-01-18 15:45:37,877 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.7142857142857144) internal successors, (78), 20 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:45:37,877 INFO L276 IsEmpty]: Start isEmpty. Operand 2862 states and 12965 transitions. [2022-01-18 15:45:37,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-01-18 15:45:37,882 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:45:37,883 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:45:37,899 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Forceful destruction successful, exit code 0 [2022-01-18 15:45:38,083 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97,94 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:45:38,083 INFO L402 AbstractCegarLoop]: === Iteration 99 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-01-18 15:45:38,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:45:38,083 INFO L85 PathProgramCache]: Analyzing trace with hash -1483154473, now seen corresponding path program 20 times [2022-01-18 15:45:38,083 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:45:38,083 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [438482731] [2022-01-18 15:45:38,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:45:38,083 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:45:38,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:45:38,175 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:45:38,175 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:45:38,175 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [438482731] [2022-01-18 15:45:38,175 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [438482731] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:45:38,175 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2080245603] [2022-01-18 15:45:38,176 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 15:45:38,176 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:45:38,176 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:45:38,177 INFO L229 MonitoredProcess]: Starting monitored process 95 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:45:38,177 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (95)] Waiting until timeout for monitored process [2022-01-18 15:45:38,205 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:45:38,205 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:45:38,206 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2022-01-18 15:45:38,206 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:45:38,328 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:45:38,328 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2022-01-18 15:45:38,519 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:45:38,519 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:45:38,656 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:45:38,656 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2080245603] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:45:38,656 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:45:38,656 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 9] total 19 [2022-01-18 15:45:38,656 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [207847662] [2022-01-18 15:45:38,656 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:45:38,656 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 15:45:38,656 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:45:38,656 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 15:45:38,657 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=308, Unknown=0, NotChecked=0, Total=380 [2022-01-18 15:45:38,657 INFO L87 Difference]: Start difference. First operand 2862 states and 12965 transitions. Second operand has 20 states, 20 states have (on average 2.8) internal successors, (56), 19 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 15:45:39,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:45:39,134 INFO L93 Difference]: Finished difference Result 3080 states and 13720 transitions. [2022-01-18 15:45:39,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-01-18 15:45:39,134 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.8) internal successors, (56), 19 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 29 [2022-01-18 15:45:39,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:45:39,141 INFO L225 Difference]: With dead ends: 3080 [2022-01-18 15:45:39,141 INFO L226 Difference]: Without dead ends: 3067 [2022-01-18 15:45:39,141 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 45 SyntacticMatches, 3 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 194 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=172, Invalid=584, Unknown=0, NotChecked=0, Total=756 [2022-01-18 15:45:39,141 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 207 mSDsluCounter, 688 mSDsCounter, 0 mSdLazyCounter, 955 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 207 SdHoareTripleChecker+Valid, 284 SdHoareTripleChecker+Invalid, 964 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 955 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 15:45:39,141 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [207 Valid, 284 Invalid, 964 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 955 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 15:45:39,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3067 states. [2022-01-18 15:45:39,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3067 to 2862. [2022-01-18 15:45:39,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2862 states, 2861 states have (on average 4.5305837119888155) internal successors, (12962), 2861 states have internal predecessors, (12962), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:45:39,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2862 states to 2862 states and 12962 transitions. [2022-01-18 15:45:39,198 INFO L78 Accepts]: Start accepts. Automaton has 2862 states and 12962 transitions. Word has length 29 [2022-01-18 15:45:39,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:45:39,198 INFO L470 AbstractCegarLoop]: Abstraction has 2862 states and 12962 transitions. [2022-01-18 15:45:39,198 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.8) internal successors, (56), 19 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 15:45:39,198 INFO L276 IsEmpty]: Start isEmpty. Operand 2862 states and 12962 transitions. [2022-01-18 15:45:39,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-01-18 15:45:39,203 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:45:39,203 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:45:39,221 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (95)] Forceful destruction successful, exit code 0 [2022-01-18 15:45:39,403 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,SelfDestructingSolverStorable98 [2022-01-18 15:45:39,403 INFO L402 AbstractCegarLoop]: === Iteration 100 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-01-18 15:45:39,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:45:39,404 INFO L85 PathProgramCache]: Analyzing trace with hash 1912450751, now seen corresponding path program 21 times [2022-01-18 15:45:39,404 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:45:39,404 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [14450575] [2022-01-18 15:45:39,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:45:39,404 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:45:39,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:45:39,499 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:45:39,499 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:45:39,499 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [14450575] [2022-01-18 15:45:39,499 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [14450575] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:45:39,499 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1933139212] [2022-01-18 15:45:39,500 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 15:45:39,500 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:45:39,500 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:45:39,500 INFO L229 MonitoredProcess]: Starting monitored process 96 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:45:39,502 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (96)] Waiting until timeout for monitored process [2022-01-18 15:45:39,532 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-01-18 15:45:39,532 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:45:39,532 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2022-01-18 15:45:39,533 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:45:39,646 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:45:39,646 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2022-01-18 15:45:39,852 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:45:39,852 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:45:39,998 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:45:39,998 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1933139212] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:45:39,998 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:45:39,998 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 20 [2022-01-18 15:45:39,998 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [143652082] [2022-01-18 15:45:39,998 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:45:39,998 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 15:45:39,998 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:45:39,999 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 15:45:39,999 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=351, Unknown=0, NotChecked=0, Total=420 [2022-01-18 15:45:39,999 INFO L87 Difference]: Start difference. First operand 2862 states and 12962 transitions. Second operand has 21 states, 21 states have (on average 2.6666666666666665) internal successors, (56), 20 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 15:45:40,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:45:40,600 INFO L93 Difference]: Finished difference Result 3113 states and 13817 transitions. [2022-01-18 15:45:40,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-01-18 15:45:40,600 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.6666666666666665) internal successors, (56), 20 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 29 [2022-01-18 15:45:40,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:45:40,607 INFO L225 Difference]: With dead ends: 3113 [2022-01-18 15:45:40,607 INFO L226 Difference]: Without dead ends: 3085 [2022-01-18 15:45:40,607 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 44 SyntacticMatches, 3 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 198 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=156, Invalid=656, Unknown=0, NotChecked=0, Total=812 [2022-01-18 15:45:40,607 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 217 mSDsluCounter, 833 mSDsCounter, 0 mSdLazyCounter, 1196 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 217 SdHoareTripleChecker+Valid, 332 SdHoareTripleChecker+Invalid, 1208 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 1196 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 15:45:40,607 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [217 Valid, 332 Invalid, 1208 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 1196 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-18 15:45:40,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3085 states. [2022-01-18 15:45:40,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3085 to 2808. [2022-01-18 15:45:40,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2808 states, 2807 states have (on average 4.5322408265051655) internal successors, (12722), 2807 states have internal predecessors, (12722), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:45:40,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2808 states to 2808 states and 12722 transitions. [2022-01-18 15:45:40,646 INFO L78 Accepts]: Start accepts. Automaton has 2808 states and 12722 transitions. Word has length 29 [2022-01-18 15:45:40,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:45:40,646 INFO L470 AbstractCegarLoop]: Abstraction has 2808 states and 12722 transitions. [2022-01-18 15:45:40,646 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.6666666666666665) internal successors, (56), 20 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 15:45:40,646 INFO L276 IsEmpty]: Start isEmpty. Operand 2808 states and 12722 transitions. [2022-01-18 15:45:40,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-01-18 15:45:40,651 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:45:40,651 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:45:40,666 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 15:45:40,851 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,SelfDestructingSolverStorable99 [2022-01-18 15:45:40,851 INFO L402 AbstractCegarLoop]: === Iteration 101 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-01-18 15:45:40,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:45:40,851 INFO L85 PathProgramCache]: Analyzing trace with hash 1052336511, now seen corresponding path program 22 times [2022-01-18 15:45:40,852 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:45:40,852 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2099236218] [2022-01-18 15:45:40,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:45:40,852 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:45:40,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:45:40,952 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:45:40,953 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:45:40,953 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2099236218] [2022-01-18 15:45:40,953 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2099236218] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:45:40,953 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1931404499] [2022-01-18 15:45:40,953 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 15:45:40,953 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:45:40,953 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:45:40,954 INFO L229 MonitoredProcess]: Starting monitored process 97 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:45:40,954 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (97)] Waiting until timeout for monitored process [2022-01-18 15:45:40,982 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 15:45:40,982 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:45:40,982 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2022-01-18 15:45:40,983 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:45:41,112 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-01-18 15:45:41,237 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:45:41,237 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:45:41,361 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:45:41,361 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 22 [2022-01-18 15:45:41,369 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:45:41,369 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 7 [2022-01-18 15:45:41,424 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:45:41,425 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1931404499] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:45:41,425 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:45:41,425 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 21 [2022-01-18 15:45:41,425 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1815370869] [2022-01-18 15:45:41,425 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:45:41,425 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 15:45:41,425 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:45:41,425 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 15:45:41,425 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=401, Unknown=0, NotChecked=0, Total=462 [2022-01-18 15:45:41,425 INFO L87 Difference]: Start difference. First operand 2808 states and 12722 transitions. Second operand has 22 states, 22 states have (on average 3.4545454545454546) internal successors, (76), 21 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:45:42,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:45:42,661 INFO L93 Difference]: Finished difference Result 3497 states and 15184 transitions. [2022-01-18 15:45:42,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-01-18 15:45:42,661 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.4545454545454546) internal successors, (76), 21 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-01-18 15:45:42,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:45:42,669 INFO L225 Difference]: With dead ends: 3497 [2022-01-18 15:45:42,669 INFO L226 Difference]: Without dead ends: 3448 [2022-01-18 15:45:42,669 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 43 SyntacticMatches, 3 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 350 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=210, Invalid=1350, Unknown=0, NotChecked=0, Total=1560 [2022-01-18 15:45:42,669 INFO L933 BasicCegarLoop]: 45 mSDtfsCounter, 323 mSDsluCounter, 1740 mSDsCounter, 0 mSdLazyCounter, 2267 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 323 SdHoareTripleChecker+Valid, 700 SdHoareTripleChecker+Invalid, 2318 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 2267 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-18 15:45:42,669 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [323 Valid, 700 Invalid, 2318 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 2267 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-18 15:45:42,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3448 states. [2022-01-18 15:45:42,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3448 to 2796. [2022-01-18 15:45:42,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2796 states, 2795 states have (on average 4.535599284436493) internal successors, (12677), 2795 states have internal predecessors, (12677), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:45:42,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2796 states to 2796 states and 12677 transitions. [2022-01-18 15:45:42,709 INFO L78 Accepts]: Start accepts. Automaton has 2796 states and 12677 transitions. Word has length 29 [2022-01-18 15:45:42,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:45:42,709 INFO L470 AbstractCegarLoop]: Abstraction has 2796 states and 12677 transitions. [2022-01-18 15:45:42,709 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 3.4545454545454546) internal successors, (76), 21 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:45:42,709 INFO L276 IsEmpty]: Start isEmpty. Operand 2796 states and 12677 transitions. [2022-01-18 15:45:42,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-01-18 15:45:42,713 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:45:42,713 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:45:42,729 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (97)] Forceful destruction successful, exit code 0 [2022-01-18 15:45:42,914 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable100 [2022-01-18 15:45:42,914 INFO L402 AbstractCegarLoop]: === Iteration 102 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-01-18 15:45:42,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:45:42,914 INFO L85 PathProgramCache]: Analyzing trace with hash -1088211267, now seen corresponding path program 23 times [2022-01-18 15:45:42,914 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:45:42,914 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1400395004] [2022-01-18 15:45:42,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:45:42,914 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:45:42,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:45:42,999 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:45:43,000 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:45:43,000 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1400395004] [2022-01-18 15:45:43,000 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1400395004] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:45:43,000 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [101725032] [2022-01-18 15:45:43,000 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 15:45:43,000 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:45:43,000 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:45:43,001 INFO L229 MonitoredProcess]: Starting monitored process 98 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:45:43,001 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (98)] Waiting until timeout for monitored process [2022-01-18 15:45:43,030 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:45:43,030 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:45:43,030 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2022-01-18 15:45:43,031 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:45:43,191 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2022-01-18 15:45:43,276 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:45:43,277 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:45:43,379 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:45:43,379 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 22 [2022-01-18 15:45:43,387 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:45:43,388 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 7 [2022-01-18 15:45:43,442 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:45:43,442 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [101725032] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:45:43,442 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:45:43,442 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 20 [2022-01-18 15:45:43,442 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [987574941] [2022-01-18 15:45:43,442 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:45:43,442 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 15:45:43,442 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:45:43,443 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 15:45:43,443 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=353, Unknown=0, NotChecked=0, Total=420 [2022-01-18 15:45:43,443 INFO L87 Difference]: Start difference. First operand 2796 states and 12677 transitions. Second operand has 21 states, 21 states have (on average 3.7142857142857144) internal successors, (78), 20 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:45:44,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:45:44,291 INFO L93 Difference]: Finished difference Result 4024 states and 17301 transitions. [2022-01-18 15:45:44,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-01-18 15:45:44,292 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.7142857142857144) internal successors, (78), 20 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-01-18 15:45:44,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:45:44,301 INFO L225 Difference]: With dead ends: 4024 [2022-01-18 15:45:44,301 INFO L226 Difference]: Without dead ends: 3986 [2022-01-18 15:45:44,301 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 44 SyntacticMatches, 3 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 330 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=230, Invalid=1176, Unknown=0, NotChecked=0, Total=1406 [2022-01-18 15:45:44,301 INFO L933 BasicCegarLoop]: 43 mSDtfsCounter, 550 mSDsluCounter, 1101 mSDsCounter, 0 mSdLazyCounter, 1498 mSolverCounterSat, 75 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 550 SdHoareTripleChecker+Valid, 446 SdHoareTripleChecker+Invalid, 1573 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 1498 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 15:45:44,301 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [550 Valid, 446 Invalid, 1573 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [75 Valid, 1498 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-18 15:45:44,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3986 states. [2022-01-18 15:45:44,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3986 to 2951. [2022-01-18 15:45:44,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2951 states, 2950 states have (on average 4.54271186440678) internal successors, (13401), 2950 states have internal predecessors, (13401), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:45:44,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2951 states to 2951 states and 13401 transitions. [2022-01-18 15:45:44,371 INFO L78 Accepts]: Start accepts. Automaton has 2951 states and 13401 transitions. Word has length 29 [2022-01-18 15:45:44,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:45:44,371 INFO L470 AbstractCegarLoop]: Abstraction has 2951 states and 13401 transitions. [2022-01-18 15:45:44,371 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.7142857142857144) internal successors, (78), 20 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:45:44,371 INFO L276 IsEmpty]: Start isEmpty. Operand 2951 states and 13401 transitions. [2022-01-18 15:45:44,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-01-18 15:45:44,376 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:45:44,376 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:45:44,391 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (98)] Ended with exit code 0 [2022-01-18 15:45:44,576 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101,98 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:45:44,576 INFO L402 AbstractCegarLoop]: === Iteration 103 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-01-18 15:45:44,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:45:44,577 INFO L85 PathProgramCache]: Analyzing trace with hash 215061339, now seen corresponding path program 24 times [2022-01-18 15:45:44,577 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:45:44,577 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1370604222] [2022-01-18 15:45:44,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:45:44,577 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:45:44,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:45:44,652 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:45:44,652 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:45:44,652 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1370604222] [2022-01-18 15:45:44,652 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1370604222] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:45:44,652 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [81233247] [2022-01-18 15:45:44,652 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 15:45:44,652 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:45:44,652 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:45:44,653 INFO L229 MonitoredProcess]: Starting monitored process 99 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:45:44,653 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (99)] Waiting until timeout for monitored process [2022-01-18 15:45:44,681 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-01-18 15:45:44,682 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:45:44,682 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2022-01-18 15:45:44,683 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:45:44,814 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:45:44,814 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-18 15:45:44,967 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:45:44,967 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:45:45,087 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:45:45,087 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [81233247] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:45:45,087 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:45:45,087 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 9] total 18 [2022-01-18 15:45:45,087 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [394936763] [2022-01-18 15:45:45,087 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:45:45,087 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-18 15:45:45,087 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:45:45,087 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-18 15:45:45,087 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2022-01-18 15:45:45,087 INFO L87 Difference]: Start difference. First operand 2951 states and 13401 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 15:45:45,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:45:45,617 INFO L93 Difference]: Finished difference Result 3262 states and 14473 transitions. [2022-01-18 15:45:45,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-01-18 15:45:45,618 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 29 [2022-01-18 15:45:45,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:45:45,625 INFO L225 Difference]: With dead ends: 3262 [2022-01-18 15:45:45,625 INFO L226 Difference]: Without dead ends: 3249 [2022-01-18 15:45:45,625 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 46 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=138, Invalid=564, Unknown=0, NotChecked=0, Total=702 [2022-01-18 15:45:45,625 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 256 mSDsluCounter, 864 mSDsCounter, 0 mSdLazyCounter, 1186 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 256 SdHoareTripleChecker+Valid, 348 SdHoareTripleChecker+Invalid, 1203 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 1186 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 15:45:45,625 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [256 Valid, 348 Invalid, 1203 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 1186 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-18 15:45:45,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3249 states. [2022-01-18 15:45:45,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3249 to 2951. [2022-01-18 15:45:45,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2951 states, 2950 states have (on average 4.541694915254237) internal successors, (13398), 2950 states have internal predecessors, (13398), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:45:45,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2951 states to 2951 states and 13398 transitions. [2022-01-18 15:45:45,667 INFO L78 Accepts]: Start accepts. Automaton has 2951 states and 13398 transitions. Word has length 29 [2022-01-18 15:45:45,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:45:45,668 INFO L470 AbstractCegarLoop]: Abstraction has 2951 states and 13398 transitions. [2022-01-18 15:45:45,668 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 15:45:45,668 INFO L276 IsEmpty]: Start isEmpty. Operand 2951 states and 13398 transitions. [2022-01-18 15:45:45,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-01-18 15:45:45,672 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:45:45,672 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:45:45,689 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 15:45:45,872 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,SelfDestructingSolverStorable102 [2022-01-18 15:45:45,873 INFO L402 AbstractCegarLoop]: === Iteration 104 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-01-18 15:45:45,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:45:45,873 INFO L85 PathProgramCache]: Analyzing trace with hash -684300733, now seen corresponding path program 25 times [2022-01-18 15:45:45,873 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:45:45,873 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [212733511] [2022-01-18 15:45:45,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:45:45,873 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:45:45,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:45:45,960 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:45:45,960 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:45:45,960 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [212733511] [2022-01-18 15:45:45,961 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [212733511] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:45:45,961 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1480434876] [2022-01-18 15:45:45,961 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 15:45:45,961 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:45:45,961 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:45:45,962 INFO L229 MonitoredProcess]: Starting monitored process 100 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:45:45,962 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (100)] Waiting until timeout for monitored process [2022-01-18 15:45:45,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:45:45,990 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2022-01-18 15:45:45,990 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:45:46,146 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2022-01-18 15:45:46,250 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:45:46,250 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:45:46,362 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:45:46,362 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 22 [2022-01-18 15:45:46,370 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:45:46,381 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 7 [2022-01-18 15:45:46,437 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:45:46,437 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1480434876] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:45:46,437 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:45:46,437 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 20 [2022-01-18 15:45:46,437 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1006160124] [2022-01-18 15:45:46,437 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:45:46,437 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 15:45:46,437 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:45:46,437 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 15:45:46,438 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=353, Unknown=0, NotChecked=0, Total=420 [2022-01-18 15:45:46,438 INFO L87 Difference]: Start difference. First operand 2951 states and 13398 transitions. Second operand has 21 states, 21 states have (on average 3.619047619047619) internal successors, (76), 20 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:45:47,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:45:47,514 INFO L93 Difference]: Finished difference Result 4082 states and 17431 transitions. [2022-01-18 15:45:47,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-01-18 15:45:47,514 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.619047619047619) internal successors, (76), 20 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-01-18 15:45:47,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:45:47,523 INFO L225 Difference]: With dead ends: 4082 [2022-01-18 15:45:47,523 INFO L226 Difference]: Without dead ends: 4039 [2022-01-18 15:45:47,523 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 44 SyntacticMatches, 3 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 392 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=238, Invalid=1322, Unknown=0, NotChecked=0, Total=1560 [2022-01-18 15:45:47,523 INFO L933 BasicCegarLoop]: 48 mSDtfsCounter, 408 mSDsluCounter, 1424 mSDsCounter, 0 mSdLazyCounter, 1830 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 408 SdHoareTripleChecker+Valid, 599 SdHoareTripleChecker+Invalid, 1871 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 1830 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-18 15:45:47,524 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [408 Valid, 599 Invalid, 1871 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 1830 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-18 15:45:47,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4039 states. [2022-01-18 15:45:47,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4039 to 2900. [2022-01-18 15:45:47,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2900 states, 2899 states have (on average 4.541911003794412) internal successors, (13167), 2899 states have internal predecessors, (13167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:45:47,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2900 states to 2900 states and 13167 transitions. [2022-01-18 15:45:47,574 INFO L78 Accepts]: Start accepts. Automaton has 2900 states and 13167 transitions. Word has length 29 [2022-01-18 15:45:47,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:45:47,574 INFO L470 AbstractCegarLoop]: Abstraction has 2900 states and 13167 transitions. [2022-01-18 15:45:47,574 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.619047619047619) internal successors, (76), 20 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:45:47,574 INFO L276 IsEmpty]: Start isEmpty. Operand 2900 states and 13167 transitions. [2022-01-18 15:45:47,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-01-18 15:45:47,578 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:45:47,578 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:45:47,594 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (100)] Forceful destruction successful, exit code 0 [2022-01-18 15:45:47,779 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable103 [2022-01-18 15:45:47,780 INFO L402 AbstractCegarLoop]: === Iteration 105 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-01-18 15:45:47,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:45:47,780 INFO L85 PathProgramCache]: Analyzing trace with hash -1544414973, now seen corresponding path program 26 times [2022-01-18 15:45:47,780 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:45:47,780 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2114507979] [2022-01-18 15:45:47,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:45:47,780 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:45:47,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:45:47,873 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 15:45:47,874 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:45:47,874 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2114507979] [2022-01-18 15:45:47,874 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2114507979] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:45:47,874 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [106896230] [2022-01-18 15:45:47,874 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 15:45:47,874 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:45:47,874 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:45:47,875 INFO L229 MonitoredProcess]: Starting monitored process 101 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:45:47,875 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (101)] Waiting until timeout for monitored process [2022-01-18 15:45:47,904 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:45:47,904 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:45:47,904 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2022-01-18 15:45:47,905 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:45:48,043 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:45:48,043 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-18 15:45:48,219 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:45:48,219 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:45:48,345 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:45:48,345 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [106896230] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:45:48,345 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:45:48,345 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 19 [2022-01-18 15:45:48,345 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [739500181] [2022-01-18 15:45:48,345 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:45:48,345 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 15:45:48,345 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:45:48,345 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 15:45:48,345 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=329, Unknown=0, NotChecked=0, Total=380 [2022-01-18 15:45:48,346 INFO L87 Difference]: Start difference. First operand 2900 states and 13167 transitions. Second operand has 20 states, 20 states have (on average 2.75) 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 15:45:48,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:45:48,780 INFO L93 Difference]: Finished difference Result 3123 states and 13925 transitions. [2022-01-18 15:45:48,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-18 15:45:48,780 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.75) 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 29 [2022-01-18 15:45:48,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:45:48,787 INFO L225 Difference]: With dead ends: 3123 [2022-01-18 15:45:48,788 INFO L226 Difference]: Without dead ends: 3108 [2022-01-18 15:45:48,788 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 45 SyntacticMatches, 3 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=99, Invalid=551, Unknown=0, NotChecked=0, Total=650 [2022-01-18 15:45:48,788 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 140 mSDsluCounter, 655 mSDsCounter, 0 mSdLazyCounter, 919 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 140 SdHoareTripleChecker+Valid, 282 SdHoareTripleChecker+Invalid, 922 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 919 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 15:45:48,788 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [140 Valid, 282 Invalid, 922 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 919 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 15:45:48,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3108 states. [2022-01-18 15:45:48,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3108 to 2888. [2022-01-18 15:45:48,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2888 states, 2887 states have (on average 4.545202632490475) internal successors, (13122), 2887 states have internal predecessors, (13122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:45:48,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2888 states to 2888 states and 13122 transitions. [2022-01-18 15:45:48,828 INFO L78 Accepts]: Start accepts. Automaton has 2888 states and 13122 transitions. Word has length 29 [2022-01-18 15:45:48,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:45:48,828 INFO L470 AbstractCegarLoop]: Abstraction has 2888 states and 13122 transitions. [2022-01-18 15:45:48,828 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.75) 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 15:45:48,828 INFO L276 IsEmpty]: Start isEmpty. Operand 2888 states and 13122 transitions. [2022-01-18 15:45:48,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-01-18 15:45:48,832 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:45:48,832 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:45:48,847 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (101)] Forceful destruction successful, exit code 0 [2022-01-18 15:45:49,032 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104,101 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:45:49,033 INFO L402 AbstractCegarLoop]: === Iteration 106 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-01-18 15:45:49,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:45:49,033 INFO L85 PathProgramCache]: Analyzing trace with hash 2042885267, now seen corresponding path program 27 times [2022-01-18 15:45:49,033 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:45:49,033 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2009066303] [2022-01-18 15:45:49,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:45:49,033 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:45:49,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:45:49,116 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:45:49,117 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:45:49,117 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2009066303] [2022-01-18 15:45:49,117 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2009066303] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:45:49,117 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1453233028] [2022-01-18 15:45:49,117 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 15:45:49,117 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:45:49,117 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:45:49,118 INFO L229 MonitoredProcess]: Starting monitored process 102 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:45:49,118 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (102)] Waiting until timeout for monitored process [2022-01-18 15:45:49,146 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-01-18 15:45:49,146 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:45:49,146 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2022-01-18 15:45:49,147 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:45:49,359 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:45:49,359 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-18 15:45:49,447 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:45:49,447 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:45:49,628 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:45:49,628 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1453233028] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:45:49,628 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:45:49,628 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-01-18 15:45:49,628 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1314178174] [2022-01-18 15:45:49,628 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:45:49,628 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-18 15:45:49,628 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:45:49,629 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-18 15:45:49,629 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=442, Unknown=0, NotChecked=0, Total=506 [2022-01-18 15:45:49,629 INFO L87 Difference]: Start difference. First operand 2888 states and 13122 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 15:45:50,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:45:50,430 INFO L93 Difference]: Finished difference Result 3227 states and 14154 transitions. [2022-01-18 15:45:50,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-01-18 15:45:50,430 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 29 [2022-01-18 15:45:50,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:45:50,438 INFO L225 Difference]: With dead ends: 3227 [2022-01-18 15:45:50,438 INFO L226 Difference]: Without dead ends: 3212 [2022-01-18 15:45:50,438 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 42 SyntacticMatches, 3 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 252 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=170, Invalid=952, Unknown=0, NotChecked=0, Total=1122 [2022-01-18 15:45:50,439 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 246 mSDsluCounter, 1132 mSDsCounter, 0 mSdLazyCounter, 1535 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 246 SdHoareTripleChecker+Valid, 445 SdHoareTripleChecker+Invalid, 1560 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 1535 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 15:45:50,439 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [246 Valid, 445 Invalid, 1560 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 1535 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-18 15:45:50,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3212 states. [2022-01-18 15:45:50,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3212 to 2896. [2022-01-18 15:45:50,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2896 states, 2895 states have (on average 4.540241796200346) internal successors, (13144), 2895 states have internal predecessors, (13144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:45:50,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2896 states to 2896 states and 13144 transitions. [2022-01-18 15:45:50,484 INFO L78 Accepts]: Start accepts. Automaton has 2896 states and 13144 transitions. Word has length 29 [2022-01-18 15:45:50,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:45:50,484 INFO L470 AbstractCegarLoop]: Abstraction has 2896 states and 13144 transitions. [2022-01-18 15:45:50,484 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 15:45:50,484 INFO L276 IsEmpty]: Start isEmpty. Operand 2896 states and 13144 transitions. [2022-01-18 15:45:50,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-01-18 15:45:50,489 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:45:50,489 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:45:50,505 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 15:45:50,690 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105,102 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:45:50,690 INFO L402 AbstractCegarLoop]: === Iteration 107 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-01-18 15:45:50,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:45:50,691 INFO L85 PathProgramCache]: Analyzing trace with hash 221849841, now seen corresponding path program 28 times [2022-01-18 15:45:50,691 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:45:50,691 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2042252975] [2022-01-18 15:45:50,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:45:50,691 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:45:50,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:45:50,782 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:45:50,782 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:45:50,783 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2042252975] [2022-01-18 15:45:50,783 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2042252975] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:45:50,783 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1345548178] [2022-01-18 15:45:50,783 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 15:45:50,783 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:45:50,783 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:45:50,784 INFO L229 MonitoredProcess]: Starting monitored process 103 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:45:50,785 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (103)] Waiting until timeout for monitored process [2022-01-18 15:45:50,811 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 15:45:50,812 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:45:50,812 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2022-01-18 15:45:50,813 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:45:50,992 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2022-01-18 15:45:51,072 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:45:51,072 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:45:51,193 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:45:51,194 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 22 [2022-01-18 15:45:51,202 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:45:51,202 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 7 [2022-01-18 15:45:51,259 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 15:45:51,259 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1345548178] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:45:51,259 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:45:51,259 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 21 [2022-01-18 15:45:51,259 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [752795390] [2022-01-18 15:45:51,259 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:45:51,259 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 15:45:51,259 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:45:51,259 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 15:45:51,259 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=405, Unknown=0, NotChecked=0, Total=462 [2022-01-18 15:45:51,260 INFO L87 Difference]: Start difference. First operand 2896 states and 13144 transitions. Second operand has 22 states, 22 states have (on average 3.4545454545454546) internal successors, (76), 21 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:45:52,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:45:52,495 INFO L93 Difference]: Finished difference Result 3822 states and 16496 transitions. [2022-01-18 15:45:52,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-01-18 15:45:52,495 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.4545454545454546) internal successors, (76), 21 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-01-18 15:45:52,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:45:52,503 INFO L225 Difference]: With dead ends: 3822 [2022-01-18 15:45:52,504 INFO L226 Difference]: Without dead ends: 3792 [2022-01-18 15:45:52,504 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 43 SyntacticMatches, 3 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 382 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=220, Invalid=1502, Unknown=0, NotChecked=0, Total=1722 [2022-01-18 15:45:52,504 INFO L933 BasicCegarLoop]: 49 mSDtfsCounter, 338 mSDsluCounter, 1683 mSDsCounter, 0 mSdLazyCounter, 2250 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 338 SdHoareTripleChecker+Valid, 691 SdHoareTripleChecker+Invalid, 2294 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 2250 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-18 15:45:52,504 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [338 Valid, 691 Invalid, 2294 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 2250 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-18 15:45:52,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3792 states. [2022-01-18 15:45:52,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3792 to 2896. [2022-01-18 15:45:52,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2896 states, 2895 states have (on average 4.541278065630397) internal successors, (13147), 2895 states have internal predecessors, (13147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:45:52,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2896 states to 2896 states and 13147 transitions. [2022-01-18 15:45:52,550 INFO L78 Accepts]: Start accepts. Automaton has 2896 states and 13147 transitions. Word has length 29 [2022-01-18 15:45:52,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:45:52,550 INFO L470 AbstractCegarLoop]: Abstraction has 2896 states and 13147 transitions. [2022-01-18 15:45:52,550 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 3.4545454545454546) internal successors, (76), 21 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:45:52,550 INFO L276 IsEmpty]: Start isEmpty. Operand 2896 states and 13147 transitions. [2022-01-18 15:45:52,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-01-18 15:45:52,555 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:45:52,555 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:45:52,570 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (103)] Ended with exit code 0 [2022-01-18 15:45:52,764 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,SelfDestructingSolverStorable106 [2022-01-18 15:45:52,764 INFO L402 AbstractCegarLoop]: === Iteration 108 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-01-18 15:45:52,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:45:52,764 INFO L85 PathProgramCache]: Analyzing trace with hash -1437686031, now seen corresponding path program 15 times [2022-01-18 15:45:52,764 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:45:52,764 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [340190966] [2022-01-18 15:45:52,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:45:52,765 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:45:52,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:45:52,850 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:45:52,850 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:45:52,850 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [340190966] [2022-01-18 15:45:52,850 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [340190966] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:45:52,850 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [471033029] [2022-01-18 15:45:52,850 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 15:45:52,850 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:45:52,851 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:45:52,851 INFO L229 MonitoredProcess]: Starting monitored process 104 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:45:52,852 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (104)] Waiting until timeout for monitored process [2022-01-18 15:45:52,879 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-01-18 15:45:52,880 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:45:52,880 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2022-01-18 15:45:52,881 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:45:53,002 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:45:53,002 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-18 15:45:53,176 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:45:53,176 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:45:53,318 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:45:53,319 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [471033029] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:45:53,319 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:45:53,319 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 19 [2022-01-18 15:45:53,319 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [705288971] [2022-01-18 15:45:53,319 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:45:53,319 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 15:45:53,319 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:45:53,319 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 15:45:53,319 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=319, Unknown=0, NotChecked=0, Total=380 [2022-01-18 15:45:53,319 INFO L87 Difference]: Start difference. First operand 2896 states and 13147 transitions. Second operand has 20 states, 20 states have (on average 2.8) internal successors, (56), 19 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 15:45:53,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:45:53,911 INFO L93 Difference]: Finished difference Result 3431 states and 15157 transitions. [2022-01-18 15:45:53,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-01-18 15:45:53,911 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.8) internal successors, (56), 19 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 29 [2022-01-18 15:45:53,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:45:53,919 INFO L225 Difference]: With dead ends: 3431 [2022-01-18 15:45:53,919 INFO L226 Difference]: Without dead ends: 3412 [2022-01-18 15:45:53,920 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 45 SyntacticMatches, 3 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 213 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=149, Invalid=663, Unknown=0, NotChecked=0, Total=812 [2022-01-18 15:45:53,920 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 326 mSDsluCounter, 851 mSDsCounter, 0 mSdLazyCounter, 1163 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 326 SdHoareTripleChecker+Valid, 332 SdHoareTripleChecker+Invalid, 1176 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 1163 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 15:45:53,920 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [326 Valid, 332 Invalid, 1176 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 1163 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-18 15:45:53,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3412 states. [2022-01-18 15:45:53,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3412 to 2939. [2022-01-18 15:45:53,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2939 states, 2938 states have (on average 4.533356024506467) internal successors, (13319), 2938 states have internal predecessors, (13319), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:45:53,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2939 states to 2939 states and 13319 transitions. [2022-01-18 15:45:53,965 INFO L78 Accepts]: Start accepts. Automaton has 2939 states and 13319 transitions. Word has length 29 [2022-01-18 15:45:53,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:45:53,965 INFO L470 AbstractCegarLoop]: Abstraction has 2939 states and 13319 transitions. [2022-01-18 15:45:53,965 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.8) internal successors, (56), 19 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 15:45:53,965 INFO L276 IsEmpty]: Start isEmpty. Operand 2939 states and 13319 transitions. [2022-01-18 15:45:53,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-01-18 15:45:53,970 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:45:53,970 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:45:53,985 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 15:45:54,170 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107,104 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:45:54,171 INFO L402 AbstractCegarLoop]: === Iteration 109 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-01-18 15:45:54,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:45:54,171 INFO L85 PathProgramCache]: Analyzing trace with hash -15331205, now seen corresponding path program 16 times [2022-01-18 15:45:54,171 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:45:54,171 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [541635175] [2022-01-18 15:45:54,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:45:54,171 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:45:54,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:45:54,253 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:45:54,253 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:45:54,253 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [541635175] [2022-01-18 15:45:54,253 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [541635175] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:45:54,253 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1553770534] [2022-01-18 15:45:54,253 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 15:45:54,253 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:45:54,253 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:45:54,254 INFO L229 MonitoredProcess]: Starting monitored process 105 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:45:54,266 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (105)] Waiting until timeout for monitored process [2022-01-18 15:45:54,293 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 15:45:54,293 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:45:54,294 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2022-01-18 15:45:54,294 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:45:54,425 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2022-01-18 15:45:54,529 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:45:54,529 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:45:54,643 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:45:54,644 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 22 [2022-01-18 15:45:54,652 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:45:54,652 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 7 [2022-01-18 15:45:54,697 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:45:54,697 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1553770534] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:45:54,697 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:45:54,697 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 19 [2022-01-18 15:45:54,697 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [289409446] [2022-01-18 15:45:54,697 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:45:54,697 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 15:45:54,697 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:45:54,697 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 15:45:54,697 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=317, Unknown=0, NotChecked=0, Total=380 [2022-01-18 15:45:54,697 INFO L87 Difference]: Start difference. First operand 2939 states and 13319 transitions. Second operand has 20 states, 20 states have (on average 3.7) internal successors, (74), 19 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:45:55,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:45:55,518 INFO L93 Difference]: Finished difference Result 4321 states and 18515 transitions. [2022-01-18 15:45:55,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-01-18 15:45:55,519 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.7) internal successors, (74), 19 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-01-18 15:45:55,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:45:55,529 INFO L225 Difference]: With dead ends: 4321 [2022-01-18 15:45:55,529 INFO L226 Difference]: Without dead ends: 4293 [2022-01-18 15:45:55,529 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 45 SyntacticMatches, 3 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 245 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=172, Invalid=884, Unknown=0, NotChecked=0, Total=1056 [2022-01-18 15:45:55,529 INFO L933 BasicCegarLoop]: 44 mSDtfsCounter, 414 mSDsluCounter, 1231 mSDsCounter, 0 mSdLazyCounter, 1633 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 414 SdHoareTripleChecker+Valid, 497 SdHoareTripleChecker+Invalid, 1673 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 1633 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 15:45:55,529 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [414 Valid, 497 Invalid, 1673 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 1633 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-18 15:45:55,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4293 states. [2022-01-18 15:45:55,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4293 to 3083. [2022-01-18 15:45:55,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3083 states, 3082 states have (on average 4.540882543802725) internal successors, (13995), 3082 states have internal predecessors, (13995), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:45:55,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3083 states to 3083 states and 13995 transitions. [2022-01-18 15:45:55,587 INFO L78 Accepts]: Start accepts. Automaton has 3083 states and 13995 transitions. Word has length 29 [2022-01-18 15:45:55,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:45:55,587 INFO L470 AbstractCegarLoop]: Abstraction has 3083 states and 13995 transitions. [2022-01-18 15:45:55,587 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.7) internal successors, (74), 19 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:45:55,587 INFO L276 IsEmpty]: Start isEmpty. Operand 3083 states and 13995 transitions. [2022-01-18 15:45:55,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-01-18 15:45:55,592 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:45:55,593 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:45:55,608 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 15:45:55,793 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108,105 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:45:55,793 INFO L402 AbstractCegarLoop]: === Iteration 110 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-01-18 15:45:55,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:45:55,793 INFO L85 PathProgramCache]: Analyzing trace with hash 385542327, now seen corresponding path program 17 times [2022-01-18 15:45:55,793 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:45:55,793 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1751870909] [2022-01-18 15:45:55,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:45:55,794 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:45:55,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:45:55,868 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:45:55,869 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:45:55,869 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1751870909] [2022-01-18 15:45:55,869 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1751870909] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:45:55,869 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1266543862] [2022-01-18 15:45:55,869 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 15:45:55,869 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:45:55,869 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:45:55,870 INFO L229 MonitoredProcess]: Starting monitored process 106 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:45:55,870 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (106)] Waiting until timeout for monitored process [2022-01-18 15:45:55,898 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:45:55,898 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:45:55,898 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2022-01-18 15:45:55,899 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:45:56,030 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2022-01-18 15:45:56,134 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:45:56,135 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:45:56,250 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:45:56,250 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 22 [2022-01-18 15:45:56,259 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:45:56,259 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 7 [2022-01-18 15:45:56,307 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:45:56,308 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1266543862] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:45:56,308 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:45:56,308 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 19 [2022-01-18 15:45:56,308 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1496389764] [2022-01-18 15:45:56,308 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:45:56,308 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 15:45:56,308 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:45:56,308 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 15:45:56,308 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=317, Unknown=0, NotChecked=0, Total=380 [2022-01-18 15:45:56,308 INFO L87 Difference]: Start difference. First operand 3083 states and 13995 transitions. Second operand has 20 states, 20 states have (on average 3.65) internal successors, (73), 19 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:45:57,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:45:57,135 INFO L93 Difference]: Finished difference Result 4335 states and 18554 transitions. [2022-01-18 15:45:57,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-01-18 15:45:57,135 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.65) internal successors, (73), 19 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-01-18 15:45:57,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:45:57,145 INFO L225 Difference]: With dead ends: 4335 [2022-01-18 15:45:57,146 INFO L226 Difference]: Without dead ends: 4302 [2022-01-18 15:45:57,146 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 45 SyntacticMatches, 3 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 241 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=176, Invalid=880, Unknown=0, NotChecked=0, Total=1056 [2022-01-18 15:45:57,146 INFO L933 BasicCegarLoop]: 44 mSDtfsCounter, 395 mSDsluCounter, 1273 mSDsCounter, 0 mSdLazyCounter, 1676 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 395 SdHoareTripleChecker+Valid, 520 SdHoareTripleChecker+Invalid, 1718 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 1676 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 15:45:57,146 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [395 Valid, 520 Invalid, 1718 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 1676 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-18 15:45:57,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4302 states. [2022-01-18 15:45:57,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4302 to 3015. [2022-01-18 15:45:57,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3015 states, 3014 states have (on average 4.542136695421367) internal successors, (13690), 3014 states have internal predecessors, (13690), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:45:57,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3015 states to 3015 states and 13690 transitions. [2022-01-18 15:45:57,200 INFO L78 Accepts]: Start accepts. Automaton has 3015 states and 13690 transitions. Word has length 29 [2022-01-18 15:45:57,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:45:57,201 INFO L470 AbstractCegarLoop]: Abstraction has 3015 states and 13690 transitions. [2022-01-18 15:45:57,201 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.65) internal successors, (73), 19 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:45:57,201 INFO L276 IsEmpty]: Start isEmpty. Operand 3015 states and 13690 transitions. [2022-01-18 15:45:57,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-01-18 15:45:57,205 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:45:57,205 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:45:57,221 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (106)] Forceful destruction successful, exit code 0 [2022-01-18 15:45:57,406 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,SelfDestructingSolverStorable109 [2022-01-18 15:45:57,406 INFO L402 AbstractCegarLoop]: === Iteration 111 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-01-18 15:45:57,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:45:57,406 INFO L85 PathProgramCache]: Analyzing trace with hash 1616862839, now seen corresponding path program 18 times [2022-01-18 15:45:57,406 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:45:57,406 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [274718147] [2022-01-18 15:45:57,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:45:57,406 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:45:57,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:45:57,498 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:45:57,498 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:45:57,498 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [274718147] [2022-01-18 15:45:57,498 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [274718147] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:45:57,498 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [4826438] [2022-01-18 15:45:57,498 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 15:45:57,498 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:45:57,499 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:45:57,499 INFO L229 MonitoredProcess]: Starting monitored process 107 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:45:57,500 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (107)] Waiting until timeout for monitored process [2022-01-18 15:45:57,530 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-01-18 15:45:57,530 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:45:57,531 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2022-01-18 15:45:57,531 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:45:57,656 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:45:57,656 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-18 15:45:57,853 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:45:57,853 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:45:57,985 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:45:57,985 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [4826438] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:45:57,985 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:45:57,985 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 19 [2022-01-18 15:45:57,985 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [856634780] [2022-01-18 15:45:57,985 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:45:57,985 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 15:45:57,985 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:45:57,985 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 15:45:57,985 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=329, Unknown=0, NotChecked=0, Total=380 [2022-01-18 15:45:57,986 INFO L87 Difference]: Start difference. First operand 3015 states and 13690 transitions. Second operand has 20 states, 20 states have (on average 2.75) 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 15:45:58,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:45:58,427 INFO L93 Difference]: Finished difference Result 3287 states and 14668 transitions. [2022-01-18 15:45:58,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-18 15:45:58,428 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.75) 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 29 [2022-01-18 15:45:58,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:45:58,435 INFO L225 Difference]: With dead ends: 3287 [2022-01-18 15:45:58,435 INFO L226 Difference]: Without dead ends: 3272 [2022-01-18 15:45:58,435 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 45 SyntacticMatches, 3 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=99, Invalid=551, Unknown=0, NotChecked=0, Total=650 [2022-01-18 15:45:58,436 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 172 mSDsluCounter, 657 mSDsCounter, 0 mSdLazyCounter, 932 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 172 SdHoareTripleChecker+Valid, 285 SdHoareTripleChecker+Invalid, 935 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 932 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 15:45:58,436 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [172 Valid, 285 Invalid, 935 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 932 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 15:45:58,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3272 states. [2022-01-18 15:45:58,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3272 to 2997. [2022-01-18 15:45:58,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2997 states, 2996 states have (on average 4.54539385847797) internal successors, (13618), 2996 states have internal predecessors, (13618), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:45:58,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2997 states to 2997 states and 13618 transitions. [2022-01-18 15:45:58,481 INFO L78 Accepts]: Start accepts. Automaton has 2997 states and 13618 transitions. Word has length 29 [2022-01-18 15:45:58,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:45:58,481 INFO L470 AbstractCegarLoop]: Abstraction has 2997 states and 13618 transitions. [2022-01-18 15:45:58,481 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.75) 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 15:45:58,482 INFO L276 IsEmpty]: Start isEmpty. Operand 2997 states and 13618 transitions. [2022-01-18 15:45:58,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-01-18 15:45:58,487 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:45:58,487 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:45:58,502 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 15:45:58,687 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110,107 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:45:58,687 INFO L402 AbstractCegarLoop]: === Iteration 112 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-01-18 15:45:58,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:45:58,687 INFO L85 PathProgramCache]: Analyzing trace with hash 1364453939, now seen corresponding path program 19 times [2022-01-18 15:45:58,687 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:45:58,687 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1229121740] [2022-01-18 15:45:58,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:45:58,688 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:45:58,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:45:58,770 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:45:58,770 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:45:58,770 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1229121740] [2022-01-18 15:45:58,770 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1229121740] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:45:58,770 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1678206527] [2022-01-18 15:45:58,770 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 15:45:58,771 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:45:58,771 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:45:58,771 INFO L229 MonitoredProcess]: Starting monitored process 108 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:45:58,772 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (108)] Waiting until timeout for monitored process [2022-01-18 15:45:58,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:45:58,800 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2022-01-18 15:45:58,800 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:45:59,018 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2022-01-18 15:45:59,078 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:45:59,078 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:45:59,216 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:45:59,216 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 22 [2022-01-18 15:45:59,224 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:45:59,225 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 7 [2022-01-18 15:45:59,273 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:45:59,273 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1678206527] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:45:59,273 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:45:59,273 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 21 [2022-01-18 15:45:59,273 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1054084756] [2022-01-18 15:45:59,273 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:45:59,273 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 15:45:59,273 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:45:59,273 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 15:45:59,273 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=407, Unknown=0, NotChecked=0, Total=462 [2022-01-18 15:45:59,273 INFO L87 Difference]: Start difference. First operand 2997 states and 13618 transitions. Second operand has 22 states, 22 states have (on average 3.4545454545454546) internal successors, (76), 21 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:46:00,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:46:00,115 INFO L93 Difference]: Finished difference Result 3324 states and 14803 transitions. [2022-01-18 15:46:00,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-01-18 15:46:00,115 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.4545454545454546) internal successors, (76), 21 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-01-18 15:46:00,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:46:00,123 INFO L225 Difference]: With dead ends: 3324 [2022-01-18 15:46:00,123 INFO L226 Difference]: Without dead ends: 3309 [2022-01-18 15:46:00,123 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 43 SyntacticMatches, 3 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 264 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=184, Invalid=1222, Unknown=0, NotChecked=0, Total=1406 [2022-01-18 15:46:00,123 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 324 mSDsluCounter, 961 mSDsCounter, 0 mSdLazyCounter, 1297 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 324 SdHoareTripleChecker+Valid, 385 SdHoareTripleChecker+Invalid, 1345 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 1297 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 15:46:00,123 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [324 Valid, 385 Invalid, 1345 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 1297 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-18 15:46:00,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3309 states. [2022-01-18 15:46:00,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3309 to 2991. [2022-01-18 15:46:00,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2991 states, 2990 states have (on average 4.548160535117057) internal successors, (13599), 2990 states have internal predecessors, (13599), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:46:00,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2991 states to 2991 states and 13599 transitions. [2022-01-18 15:46:00,166 INFO L78 Accepts]: Start accepts. Automaton has 2991 states and 13599 transitions. Word has length 29 [2022-01-18 15:46:00,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:46:00,166 INFO L470 AbstractCegarLoop]: Abstraction has 2991 states and 13599 transitions. [2022-01-18 15:46:00,166 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 3.4545454545454546) internal successors, (76), 21 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:46:00,166 INFO L276 IsEmpty]: Start isEmpty. Operand 2991 states and 13599 transitions. [2022-01-18 15:46:00,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-01-18 15:46:00,171 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:46:00,171 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:46:00,187 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (108)] Forceful destruction successful, exit code 0 [2022-01-18 15:46:00,386 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 108 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable111 [2022-01-18 15:46:00,386 INFO L402 AbstractCegarLoop]: === Iteration 113 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-01-18 15:46:00,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:46:00,386 INFO L85 PathProgramCache]: Analyzing trace with hash -456581487, now seen corresponding path program 20 times [2022-01-18 15:46:00,386 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:46:00,386 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1438584709] [2022-01-18 15:46:00,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:46:00,386 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:46:00,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:46:00,494 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:46:00,494 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:46:00,494 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1438584709] [2022-01-18 15:46:00,494 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1438584709] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:46:00,494 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1564664554] [2022-01-18 15:46:00,494 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 15:46:00,494 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:46:00,494 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:46:00,495 INFO L229 MonitoredProcess]: Starting monitored process 109 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:46:00,496 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (109)] Waiting until timeout for monitored process [2022-01-18 15:46:00,524 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:46:00,524 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:46:00,524 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2022-01-18 15:46:00,525 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:46:00,708 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:46:00,708 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 21 [2022-01-18 15:46:00,837 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:46:00,837 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:46:00,960 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:46:00,960 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1564664554] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:46:00,961 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:46:00,961 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 19 [2022-01-18 15:46:00,961 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [202761795] [2022-01-18 15:46:00,961 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:46:00,961 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 15:46:00,961 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:46:00,961 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 15:46:00,961 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=329, Unknown=0, NotChecked=0, Total=380 [2022-01-18 15:46:00,961 INFO L87 Difference]: Start difference. First operand 2991 states and 13599 transitions. Second operand has 20 states, 20 states have (on average 2.75) 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 15:46:01,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:46:01,412 INFO L93 Difference]: Finished difference Result 3244 states and 14493 transitions. [2022-01-18 15:46:01,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-18 15:46:01,412 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.75) 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 29 [2022-01-18 15:46:01,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:46:01,420 INFO L225 Difference]: With dead ends: 3244 [2022-01-18 15:46:01,420 INFO L226 Difference]: Without dead ends: 3229 [2022-01-18 15:46:01,420 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 45 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=92, Invalid=508, Unknown=0, NotChecked=0, Total=600 [2022-01-18 15:46:01,420 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 141 mSDsluCounter, 702 mSDsCounter, 0 mSdLazyCounter, 956 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 141 SdHoareTripleChecker+Valid, 304 SdHoareTripleChecker+Invalid, 959 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 956 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 15:46:01,420 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [141 Valid, 304 Invalid, 959 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 956 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 15:46:01,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3229 states. [2022-01-18 15:46:01,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3229 to 2972. [2022-01-18 15:46:01,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2972 states, 2971 states have (on average 4.554022214742511) internal successors, (13530), 2971 states have internal predecessors, (13530), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:46:01,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2972 states to 2972 states and 13530 transitions. [2022-01-18 15:46:01,477 INFO L78 Accepts]: Start accepts. Automaton has 2972 states and 13530 transitions. Word has length 29 [2022-01-18 15:46:01,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:46:01,477 INFO L470 AbstractCegarLoop]: Abstraction has 2972 states and 13530 transitions. [2022-01-18 15:46:01,477 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.75) 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 15:46:01,477 INFO L276 IsEmpty]: Start isEmpty. Operand 2972 states and 13530 transitions. [2022-01-18 15:46:01,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-01-18 15:46:01,481 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:46:01,482 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:46:01,497 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 15:46:01,682 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112,109 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:46:01,683 INFO L402 AbstractCegarLoop]: === Iteration 114 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-01-18 15:46:01,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:46:01,683 INFO L85 PathProgramCache]: Analyzing trace with hash 1831959469, now seen corresponding path program 21 times [2022-01-18 15:46:01,683 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:46:01,683 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [408564443] [2022-01-18 15:46:01,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:46:01,683 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:46:01,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:46:01,788 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:46:01,789 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:46:01,789 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [408564443] [2022-01-18 15:46:01,789 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [408564443] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:46:01,789 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1628364199] [2022-01-18 15:46:01,789 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 15:46:01,789 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:46:01,789 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:46:01,790 INFO L229 MonitoredProcess]: Starting monitored process 110 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:46:01,790 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (110)] Waiting until timeout for monitored process [2022-01-18 15:46:01,822 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-01-18 15:46:01,822 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:46:01,822 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2022-01-18 15:46:01,823 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:46:01,921 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:46:01,922 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2022-01-18 15:46:02,151 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:46:02,151 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:46:02,314 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:46:02,314 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1628364199] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:46:02,314 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:46:02,314 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 20 [2022-01-18 15:46:02,314 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1816145769] [2022-01-18 15:46:02,314 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:46:02,314 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 15:46:02,314 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:46:02,315 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 15:46:02,315 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=349, Unknown=0, NotChecked=0, Total=420 [2022-01-18 15:46:02,315 INFO L87 Difference]: Start difference. First operand 2972 states and 13530 transitions. Second operand has 21 states, 21 states have (on average 2.7142857142857144) 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 15:46:02,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:46:02,985 INFO L93 Difference]: Finished difference Result 3355 states and 14980 transitions. [2022-01-18 15:46:02,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-01-18 15:46:02,985 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.7142857142857144) 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 29 [2022-01-18 15:46:02,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:46:02,994 INFO L225 Difference]: With dead ends: 3355 [2022-01-18 15:46:02,994 INFO L226 Difference]: Without dead ends: 3336 [2022-01-18 15:46:02,994 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 44 SyntacticMatches, 3 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 229 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=178, Invalid=692, Unknown=0, NotChecked=0, Total=870 [2022-01-18 15:46:02,994 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 268 mSDsluCounter, 844 mSDsCounter, 0 mSdLazyCounter, 1207 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 268 SdHoareTripleChecker+Valid, 332 SdHoareTripleChecker+Invalid, 1223 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 1207 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 15:46:02,995 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [268 Valid, 332 Invalid, 1223 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 1207 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-18 15:46:02,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3336 states. [2022-01-18 15:46:03,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3336 to 3012. [2022-01-18 15:46:03,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3012 states, 3011 states have (on average 4.549651278644968) internal successors, (13699), 3011 states have internal predecessors, (13699), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:46:03,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3012 states to 3012 states and 13699 transitions. [2022-01-18 15:46:03,045 INFO L78 Accepts]: Start accepts. Automaton has 3012 states and 13699 transitions. Word has length 29 [2022-01-18 15:46:03,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:46:03,045 INFO L470 AbstractCegarLoop]: Abstraction has 3012 states and 13699 transitions. [2022-01-18 15:46:03,045 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.7142857142857144) 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 15:46:03,046 INFO L276 IsEmpty]: Start isEmpty. Operand 3012 states and 13699 transitions. [2022-01-18 15:46:03,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-01-18 15:46:03,051 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:46:03,051 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:46:03,069 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (110)] Forceful destruction successful, exit code 0 [2022-01-18 15:46:03,266 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,SelfDestructingSolverStorable113 [2022-01-18 15:46:03,266 INFO L402 AbstractCegarLoop]: === Iteration 115 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-01-18 15:46:03,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:46:03,266 INFO L85 PathProgramCache]: Analyzing trace with hash -1040653001, now seen corresponding path program 22 times [2022-01-18 15:46:03,266 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:46:03,266 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1372990698] [2022-01-18 15:46:03,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:46:03,266 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:46:03,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:46:03,352 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:46:03,352 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:46:03,352 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1372990698] [2022-01-18 15:46:03,352 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1372990698] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:46:03,352 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [470353189] [2022-01-18 15:46:03,352 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 15:46:03,353 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:46:03,353 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:46:03,353 INFO L229 MonitoredProcess]: Starting monitored process 111 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:46:03,354 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (111)] Waiting until timeout for monitored process [2022-01-18 15:46:03,381 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 15:46:03,381 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:46:03,382 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2022-01-18 15:46:03,382 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:46:03,489 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-01-18 15:46:03,612 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:46:03,613 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:46:03,724 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:46:03,724 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 22 [2022-01-18 15:46:03,732 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:46:03,732 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 7 [2022-01-18 15:46:03,774 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:46:03,774 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [470353189] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:46:03,774 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:46:03,774 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 19 [2022-01-18 15:46:03,775 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [938156234] [2022-01-18 15:46:03,775 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:46:03,775 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 15:46:03,775 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:46:03,775 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 15:46:03,775 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=311, Unknown=0, NotChecked=0, Total=380 [2022-01-18 15:46:03,775 INFO L87 Difference]: Start difference. First operand 3012 states and 13699 transitions. Second operand has 20 states, 20 states have (on average 3.7) internal successors, (74), 19 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:46:04,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:46:04,513 INFO L93 Difference]: Finished difference Result 4029 states and 17462 transitions. [2022-01-18 15:46:04,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-01-18 15:46:04,513 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.7) internal successors, (74), 19 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-01-18 15:46:04,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:46:04,523 INFO L225 Difference]: With dead ends: 4029 [2022-01-18 15:46:04,523 INFO L226 Difference]: Without dead ends: 4001 [2022-01-18 15:46:04,523 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 45 SyntacticMatches, 3 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 238 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=189, Invalid=803, Unknown=0, NotChecked=0, Total=992 [2022-01-18 15:46:04,523 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 325 mSDsluCounter, 1119 mSDsCounter, 0 mSdLazyCounter, 1446 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 325 SdHoareTripleChecker+Valid, 444 SdHoareTripleChecker+Invalid, 1485 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 1446 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 15:46:04,524 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [325 Valid, 444 Invalid, 1485 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 1446 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-18 15:46:04,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4001 states. [2022-01-18 15:46:04,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4001 to 3137. [2022-01-18 15:46:04,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3137 states, 3136 states have (on average 4.548788265306122) internal successors, (14265), 3136 states have internal predecessors, (14265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:46:04,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3137 states to 3137 states and 14265 transitions. [2022-01-18 15:46:04,578 INFO L78 Accepts]: Start accepts. Automaton has 3137 states and 14265 transitions. Word has length 29 [2022-01-18 15:46:04,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:46:04,578 INFO L470 AbstractCegarLoop]: Abstraction has 3137 states and 14265 transitions. [2022-01-18 15:46:04,578 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.7) internal successors, (74), 19 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:46:04,578 INFO L276 IsEmpty]: Start isEmpty. Operand 3137 states and 14265 transitions. [2022-01-18 15:46:04,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-01-18 15:46:04,583 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:46:04,584 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:46:04,598 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (111)] Forceful destruction successful, exit code 0 [2022-01-18 15:46:04,784 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,SelfDestructingSolverStorable114 [2022-01-18 15:46:04,784 INFO L402 AbstractCegarLoop]: === Iteration 116 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-01-18 15:46:04,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:46:04,784 INFO L85 PathProgramCache]: Analyzing trace with hash -639779469, now seen corresponding path program 23 times [2022-01-18 15:46:04,784 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:46:04,784 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [921634265] [2022-01-18 15:46:04,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:46:04,784 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:46:04,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:46:04,867 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:46:04,867 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:46:04,867 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [921634265] [2022-01-18 15:46:04,867 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [921634265] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:46:04,867 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1399505411] [2022-01-18 15:46:04,868 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 15:46:04,868 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:46:04,868 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:46:04,868 INFO L229 MonitoredProcess]: Starting monitored process 112 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:46:04,869 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (112)] Waiting until timeout for monitored process [2022-01-18 15:46:04,896 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:46:04,897 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:46:04,897 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2022-01-18 15:46:04,897 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:46:05,007 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-01-18 15:46:05,125 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:46:05,125 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:46:05,232 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:46:05,232 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 22 [2022-01-18 15:46:05,241 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:46:05,242 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 7 [2022-01-18 15:46:05,288 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:46:05,288 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1399505411] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:46:05,288 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:46:05,288 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 19 [2022-01-18 15:46:05,288 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1158630433] [2022-01-18 15:46:05,288 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:46:05,289 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 15:46:05,289 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:46:05,289 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 15:46:05,289 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=311, Unknown=0, NotChecked=0, Total=380 [2022-01-18 15:46:05,289 INFO L87 Difference]: Start difference. First operand 3137 states and 14265 transitions. Second operand has 20 states, 20 states have (on average 3.65) internal successors, (73), 19 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:46:06,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:46:06,060 INFO L93 Difference]: Finished difference Result 4043 states and 17501 transitions. [2022-01-18 15:46:06,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-01-18 15:46:06,061 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.65) internal successors, (73), 19 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-01-18 15:46:06,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:46:06,070 INFO L225 Difference]: With dead ends: 4043 [2022-01-18 15:46:06,070 INFO L226 Difference]: Without dead ends: 4010 [2022-01-18 15:46:06,070 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 45 SyntacticMatches, 3 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 253 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=202, Invalid=854, Unknown=0, NotChecked=0, Total=1056 [2022-01-18 15:46:06,070 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 357 mSDsluCounter, 1061 mSDsCounter, 0 mSdLazyCounter, 1373 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 357 SdHoareTripleChecker+Valid, 431 SdHoareTripleChecker+Invalid, 1406 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 1373 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 15:46:06,070 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [357 Valid, 431 Invalid, 1406 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 1373 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-18 15:46:06,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4010 states. [2022-01-18 15:46:06,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4010 to 3038. [2022-01-18 15:46:06,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3038 states, 3037 states have (on average 4.552848205465921) internal successors, (13827), 3037 states have internal predecessors, (13827), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:46:06,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3038 states to 3038 states and 13827 transitions. [2022-01-18 15:46:06,119 INFO L78 Accepts]: Start accepts. Automaton has 3038 states and 13827 transitions. Word has length 29 [2022-01-18 15:46:06,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:46:06,120 INFO L470 AbstractCegarLoop]: Abstraction has 3038 states and 13827 transitions. [2022-01-18 15:46:06,120 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.65) internal successors, (73), 19 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:46:06,120 INFO L276 IsEmpty]: Start isEmpty. Operand 3038 states and 13827 transitions. [2022-01-18 15:46:06,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-01-18 15:46:06,124 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:46:06,124 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:46:06,139 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 15:46:06,326 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,SelfDestructingSolverStorable115 [2022-01-18 15:46:06,326 INFO L402 AbstractCegarLoop]: === Iteration 117 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-01-18 15:46:06,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:46:06,326 INFO L85 PathProgramCache]: Analyzing trace with hash 591541043, now seen corresponding path program 24 times [2022-01-18 15:46:06,327 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:46:06,327 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1150115583] [2022-01-18 15:46:06,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:46:06,327 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:46:06,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:46:06,437 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:46:06,437 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:46:06,437 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1150115583] [2022-01-18 15:46:06,437 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1150115583] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:46:06,437 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [989172555] [2022-01-18 15:46:06,437 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 15:46:06,437 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:46:06,437 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:46:06,438 INFO L229 MonitoredProcess]: Starting monitored process 113 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:46:06,438 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (113)] Waiting until timeout for monitored process [2022-01-18 15:46:06,466 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-01-18 15:46:06,467 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:46:06,467 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2022-01-18 15:46:06,467 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:46:06,566 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:46:06,566 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2022-01-18 15:46:06,795 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:46:06,796 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:46:06,947 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:46:06,947 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [989172555] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:46:06,947 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:46:06,948 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 20 [2022-01-18 15:46:06,948 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [549385794] [2022-01-18 15:46:06,948 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:46:06,948 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 15:46:06,948 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:46:06,948 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 15:46:06,948 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=364, Unknown=0, NotChecked=0, Total=420 [2022-01-18 15:46:06,948 INFO L87 Difference]: Start difference. First operand 3038 states and 13827 transitions. Second operand has 21 states, 21 states have (on average 2.6666666666666665) internal successors, (56), 20 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 15:46:07,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:46:07,386 INFO L93 Difference]: Finished difference Result 3150 states and 14218 transitions. [2022-01-18 15:46:07,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-18 15:46:07,386 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.6666666666666665) internal successors, (56), 20 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 29 [2022-01-18 15:46:07,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:46:07,393 INFO L225 Difference]: With dead ends: 3150 [2022-01-18 15:46:07,393 INFO L226 Difference]: Without dead ends: 3135 [2022-01-18 15:46:07,393 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 44 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=102, Invalid=600, Unknown=0, NotChecked=0, Total=702 [2022-01-18 15:46:07,393 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 128 mSDsluCounter, 648 mSDsCounter, 0 mSdLazyCounter, 927 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 128 SdHoareTripleChecker+Valid, 285 SdHoareTripleChecker+Invalid, 930 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 927 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 15:46:07,393 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [128 Valid, 285 Invalid, 930 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 927 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 15:46:07,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3135 states. [2022-01-18 15:46:07,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3135 to 3017. [2022-01-18 15:46:07,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3017 states, 3016 states have (on average 4.5576923076923075) internal successors, (13746), 3016 states have internal predecessors, (13746), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:46:07,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3017 states to 3017 states and 13746 transitions. [2022-01-18 15:46:07,433 INFO L78 Accepts]: Start accepts. Automaton has 3017 states and 13746 transitions. Word has length 29 [2022-01-18 15:46:07,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:46:07,433 INFO L470 AbstractCegarLoop]: Abstraction has 3017 states and 13746 transitions. [2022-01-18 15:46:07,433 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.6666666666666665) internal successors, (56), 20 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 15:46:07,433 INFO L276 IsEmpty]: Start isEmpty. Operand 3017 states and 13746 transitions. [2022-01-18 15:46:07,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-01-18 15:46:07,438 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:46:07,438 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:46:07,453 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (113)] Ended with exit code 0 [2022-01-18 15:46:07,638 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,SelfDestructingSolverStorable116 [2022-01-18 15:46:07,638 INFO L402 AbstractCegarLoop]: === Iteration 118 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-01-18 15:46:07,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:46:07,638 INFO L85 PathProgramCache]: Analyzing trace with hash -1215097935, now seen corresponding path program 25 times [2022-01-18 15:46:07,639 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:46:07,639 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [736440037] [2022-01-18 15:46:07,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:46:07,639 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:46:07,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:46:07,732 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:46:07,733 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:46:07,733 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [736440037] [2022-01-18 15:46:07,733 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [736440037] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:46:07,733 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [959233559] [2022-01-18 15:46:07,733 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 15:46:07,733 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:46:07,733 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:46:07,734 INFO L229 MonitoredProcess]: Starting monitored process 114 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:46:07,734 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (114)] Waiting until timeout for monitored process [2022-01-18 15:46:07,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:46:07,773 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2022-01-18 15:46:07,773 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:46:07,881 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-01-18 15:46:07,996 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:46:07,997 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:46:08,104 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:46:08,104 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 22 [2022-01-18 15:46:08,112 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:46:08,112 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 7 [2022-01-18 15:46:08,155 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:46:08,155 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [959233559] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:46:08,155 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:46:08,155 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 20 [2022-01-18 15:46:08,155 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [15579927] [2022-01-18 15:46:08,155 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:46:08,155 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 15:46:08,155 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:46:08,155 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 15:46:08,155 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=347, Unknown=0, NotChecked=0, Total=420 [2022-01-18 15:46:08,155 INFO L87 Difference]: Start difference. First operand 3017 states and 13746 transitions. Second operand has 21 states, 21 states have (on average 3.7142857142857144) internal successors, (78), 20 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:46:09,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:46:09,022 INFO L93 Difference]: Finished difference Result 4128 states and 17779 transitions. [2022-01-18 15:46:09,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-01-18 15:46:09,023 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.7142857142857144) internal successors, (78), 20 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-01-18 15:46:09,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:46:09,032 INFO L225 Difference]: With dead ends: 4128 [2022-01-18 15:46:09,032 INFO L226 Difference]: Without dead ends: 4090 [2022-01-18 15:46:09,032 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 44 SyntacticMatches, 3 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 350 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=257, Invalid=1149, Unknown=0, NotChecked=0, Total=1406 [2022-01-18 15:46:09,032 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 515 mSDsluCounter, 1054 mSDsCounter, 0 mSdLazyCounter, 1361 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 515 SdHoareTripleChecker+Valid, 412 SdHoareTripleChecker+Invalid, 1429 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 1361 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 15:46:09,032 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [515 Valid, 412 Invalid, 1429 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 1361 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-18 15:46:09,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4090 states. [2022-01-18 15:46:09,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4090 to 3177. [2022-01-18 15:46:09,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3177 states, 3176 states have (on average 4.554156171284634) internal successors, (14464), 3176 states have internal predecessors, (14464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:46:09,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3177 states to 3177 states and 14464 transitions. [2022-01-18 15:46:09,084 INFO L78 Accepts]: Start accepts. Automaton has 3177 states and 14464 transitions. Word has length 29 [2022-01-18 15:46:09,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:46:09,084 INFO L470 AbstractCegarLoop]: Abstraction has 3177 states and 14464 transitions. [2022-01-18 15:46:09,084 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.7142857142857144) internal successors, (78), 20 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:46:09,085 INFO L276 IsEmpty]: Start isEmpty. Operand 3177 states and 14464 transitions. [2022-01-18 15:46:09,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-01-18 15:46:09,090 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:46:09,090 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:46:09,105 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (114)] Forceful destruction successful, exit code 0 [2022-01-18 15:46:09,290 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117,114 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:46:09,290 INFO L402 AbstractCegarLoop]: === Iteration 119 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-01-18 15:46:09,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:46:09,290 INFO L85 PathProgramCache]: Analyzing trace with hash 207256891, now seen corresponding path program 26 times [2022-01-18 15:46:09,291 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:46:09,291 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1941805976] [2022-01-18 15:46:09,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:46:09,291 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:46:09,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:46:09,375 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:46:09,375 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:46:09,375 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1941805976] [2022-01-18 15:46:09,375 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1941805976] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:46:09,375 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1247241716] [2022-01-18 15:46:09,375 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 15:46:09,375 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:46:09,375 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:46:09,376 INFO L229 MonitoredProcess]: Starting monitored process 115 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:46:09,376 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (115)] Waiting until timeout for monitored process [2022-01-18 15:46:09,404 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:46:09,405 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:46:09,405 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2022-01-18 15:46:09,406 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:46:09,504 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:46:09,504 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2022-01-18 15:46:09,708 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:46:09,708 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:46:09,847 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:46:09,847 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1247241716] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:46:09,847 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:46:09,848 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 9] total 19 [2022-01-18 15:46:09,848 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1839965891] [2022-01-18 15:46:09,848 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:46:09,848 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 15:46:09,848 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:46:09,848 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 15:46:09,848 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=308, Unknown=0, NotChecked=0, Total=380 [2022-01-18 15:46:09,848 INFO L87 Difference]: Start difference. First operand 3177 states and 14464 transitions. Second operand has 20 states, 20 states have (on average 2.8) internal successors, (56), 19 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 15:46:10,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:46:10,331 INFO L93 Difference]: Finished difference Result 3501 states and 15546 transitions. [2022-01-18 15:46:10,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-01-18 15:46:10,331 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.8) internal successors, (56), 19 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 29 [2022-01-18 15:46:10,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:46:10,339 INFO L225 Difference]: With dead ends: 3501 [2022-01-18 15:46:10,339 INFO L226 Difference]: Without dead ends: 3488 [2022-01-18 15:46:10,339 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 45 SyntacticMatches, 3 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 196 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=172, Invalid=584, Unknown=0, NotChecked=0, Total=756 [2022-01-18 15:46:10,339 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 271 mSDsluCounter, 655 mSDsCounter, 0 mSdLazyCounter, 904 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 271 SdHoareTripleChecker+Valid, 263 SdHoareTripleChecker+Invalid, 919 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 904 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 15:46:10,339 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [271 Valid, 263 Invalid, 919 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 904 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 15:46:10,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3488 states. [2022-01-18 15:46:10,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3488 to 3177. [2022-01-18 15:46:10,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3177 states, 3176 states have (on average 4.553211586901763) internal successors, (14461), 3176 states have internal predecessors, (14461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:46:10,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3177 states to 3177 states and 14461 transitions. [2022-01-18 15:46:10,389 INFO L78 Accepts]: Start accepts. Automaton has 3177 states and 14461 transitions. Word has length 29 [2022-01-18 15:46:10,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:46:10,389 INFO L470 AbstractCegarLoop]: Abstraction has 3177 states and 14461 transitions. [2022-01-18 15:46:10,389 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.8) internal successors, (56), 19 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 15:46:10,389 INFO L276 IsEmpty]: Start isEmpty. Operand 3177 states and 14461 transitions. [2022-01-18 15:46:10,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-01-18 15:46:10,395 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:46:10,395 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:46:10,410 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 15:46:10,595 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118,115 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:46:10,595 INFO L402 AbstractCegarLoop]: === Iteration 120 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-01-18 15:46:10,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:46:10,595 INFO L85 PathProgramCache]: Analyzing trace with hash -237845129, now seen corresponding path program 27 times [2022-01-18 15:46:10,595 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:46:10,595 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1801735422] [2022-01-18 15:46:10,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:46:10,595 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:46:10,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:46:10,691 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:46:10,691 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:46:10,691 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1801735422] [2022-01-18 15:46:10,691 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1801735422] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:46:10,691 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1985148732] [2022-01-18 15:46:10,691 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 15:46:10,691 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:46:10,691 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:46:10,692 INFO L229 MonitoredProcess]: Starting monitored process 116 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:46:10,692 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (116)] Waiting until timeout for monitored process [2022-01-18 15:46:10,720 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-01-18 15:46:10,720 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:46:10,721 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2022-01-18 15:46:10,721 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:46:10,836 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:46:10,837 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2022-01-18 15:46:11,068 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:46:11,069 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:46:11,219 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:46:11,219 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1985148732] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:46:11,219 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:46:11,220 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 20 [2022-01-18 15:46:11,220 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1989142222] [2022-01-18 15:46:11,220 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:46:11,220 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 15:46:11,220 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:46:11,220 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 15:46:11,220 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=351, Unknown=0, NotChecked=0, Total=420 [2022-01-18 15:46:11,220 INFO L87 Difference]: Start difference. First operand 3177 states and 14461 transitions. Second operand has 21 states, 21 states have (on average 2.6666666666666665) internal successors, (56), 20 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 15:46:11,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:46:11,866 INFO L93 Difference]: Finished difference Result 3456 states and 15433 transitions. [2022-01-18 15:46:11,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-01-18 15:46:11,866 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.6666666666666665) internal successors, (56), 20 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 29 [2022-01-18 15:46:11,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:46:11,874 INFO L225 Difference]: With dead ends: 3456 [2022-01-18 15:46:11,874 INFO L226 Difference]: Without dead ends: 3428 [2022-01-18 15:46:11,874 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 44 SyntacticMatches, 3 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 198 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=156, Invalid=656, Unknown=0, NotChecked=0, Total=812 [2022-01-18 15:46:11,874 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 205 mSDsluCounter, 903 mSDsCounter, 0 mSdLazyCounter, 1286 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 205 SdHoareTripleChecker+Valid, 349 SdHoareTripleChecker+Invalid, 1299 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 1286 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 15:46:11,875 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [205 Valid, 349 Invalid, 1299 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 1286 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-18 15:46:11,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3428 states. [2022-01-18 15:46:11,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3428 to 3105. [2022-01-18 15:46:11,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3105 states, 3104 states have (on average 4.555412371134021) internal successors, (14140), 3104 states have internal predecessors, (14140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:46:11,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3105 states to 3105 states and 14140 transitions. [2022-01-18 15:46:11,920 INFO L78 Accepts]: Start accepts. Automaton has 3105 states and 14140 transitions. Word has length 29 [2022-01-18 15:46:11,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:46:11,920 INFO L470 AbstractCegarLoop]: Abstraction has 3105 states and 14140 transitions. [2022-01-18 15:46:11,920 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.6666666666666665) internal successors, (56), 20 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 15:46:11,920 INFO L276 IsEmpty]: Start isEmpty. Operand 3105 states and 14140 transitions. [2022-01-18 15:46:11,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-01-18 15:46:11,925 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:46:11,925 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:46:11,946 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (116)] Ended with exit code 0 [2022-01-18 15:46:12,126 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119,116 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:46:12,126 INFO L402 AbstractCegarLoop]: === Iteration 121 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-01-18 15:46:12,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:46:12,126 INFO L85 PathProgramCache]: Analyzing trace with hash -1376425363, now seen corresponding path program 28 times [2022-01-18 15:46:12,126 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:46:12,126 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1618950236] [2022-01-18 15:46:12,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:46:12,126 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:46:12,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:46:12,234 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:46:12,235 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:46:12,235 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1618950236] [2022-01-18 15:46:12,235 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1618950236] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:46:12,235 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2007981404] [2022-01-18 15:46:12,235 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 15:46:12,235 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:46:12,235 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:46:12,236 INFO L229 MonitoredProcess]: Starting monitored process 117 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:46:12,236 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (117)] Waiting until timeout for monitored process [2022-01-18 15:46:12,264 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 15:46:12,264 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:46:12,265 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2022-01-18 15:46:12,265 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:46:12,376 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-01-18 15:46:12,513 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:46:12,513 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:46:12,637 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:46:12,637 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 22 [2022-01-18 15:46:12,646 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:46:12,647 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 7 [2022-01-18 15:46:12,693 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:46:12,693 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2007981404] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:46:12,693 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:46:12,693 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 21 [2022-01-18 15:46:12,693 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1799229648] [2022-01-18 15:46:12,693 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:46:12,694 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 15:46:12,694 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:46:12,694 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 15:46:12,694 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=401, Unknown=0, NotChecked=0, Total=462 [2022-01-18 15:46:12,694 INFO L87 Difference]: Start difference. First operand 3105 states and 14140 transitions. Second operand has 22 states, 22 states have (on average 3.5454545454545454) internal successors, (78), 21 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:46:13,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:46:13,751 INFO L93 Difference]: Finished difference Result 3817 states and 16664 transitions. [2022-01-18 15:46:13,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-01-18 15:46:13,752 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.5454545454545454) internal successors, (78), 21 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-01-18 15:46:13,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:46:13,760 INFO L225 Difference]: With dead ends: 3817 [2022-01-18 15:46:13,760 INFO L226 Difference]: Without dead ends: 3779 [2022-01-18 15:46:13,760 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 43 SyntacticMatches, 3 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 355 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=198, Invalid=1362, Unknown=0, NotChecked=0, Total=1560 [2022-01-18 15:46:13,760 INFO L933 BasicCegarLoop]: 46 mSDtfsCounter, 381 mSDsluCounter, 1392 mSDsCounter, 0 mSdLazyCounter, 1780 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 381 SdHoareTripleChecker+Valid, 542 SdHoareTripleChecker+Invalid, 1841 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 1780 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-18 15:46:13,760 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [381 Valid, 542 Invalid, 1841 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 1780 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-18 15:46:13,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3779 states. [2022-01-18 15:46:13,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3779 to 3105. [2022-01-18 15:46:13,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3105 states, 3104 states have (on average 4.555412371134021) internal successors, (14140), 3104 states have internal predecessors, (14140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:46:13,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3105 states to 3105 states and 14140 transitions. [2022-01-18 15:46:13,805 INFO L78 Accepts]: Start accepts. Automaton has 3105 states and 14140 transitions. Word has length 29 [2022-01-18 15:46:13,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:46:13,805 INFO L470 AbstractCegarLoop]: Abstraction has 3105 states and 14140 transitions. [2022-01-18 15:46:13,806 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 3.5454545454545454) internal successors, (78), 21 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:46:13,806 INFO L276 IsEmpty]: Start isEmpty. Operand 3105 states and 14140 transitions. [2022-01-18 15:46:13,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-01-18 15:46:13,811 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:46:13,811 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:46:13,826 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (117)] Ended with exit code 0 [2022-01-18 15:46:14,011 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120,117 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:46:14,011 INFO L402 AbstractCegarLoop]: === Iteration 122 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-01-18 15:46:14,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:46:14,011 INFO L85 PathProgramCache]: Analyzing trace with hash 1595564283, now seen corresponding path program 29 times [2022-01-18 15:46:14,011 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:46:14,011 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1799309049] [2022-01-18 15:46:14,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:46:14,012 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:46:14,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:46:14,105 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:46:14,105 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:46:14,105 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1799309049] [2022-01-18 15:46:14,105 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1799309049] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:46:14,105 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [561958042] [2022-01-18 15:46:14,105 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 15:46:14,105 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:46:14,105 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:46:14,106 INFO L229 MonitoredProcess]: Starting monitored process 118 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:46:14,107 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (118)] Waiting until timeout for monitored process [2022-01-18 15:46:14,138 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 15:46:14,138 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:46:14,138 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2022-01-18 15:46:14,139 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:46:14,255 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-01-18 15:46:14,386 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:46:14,386 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:46:14,500 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:46:14,500 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 22 [2022-01-18 15:46:14,508 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:46:14,508 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 7 [2022-01-18 15:46:14,550 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:46:14,550 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [561958042] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:46:14,551 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:46:14,551 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 19 [2022-01-18 15:46:14,551 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1035158967] [2022-01-18 15:46:14,551 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:46:14,551 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 15:46:14,551 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:46:14,551 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 15:46:14,551 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=317, Unknown=0, NotChecked=0, Total=380 [2022-01-18 15:46:14,551 INFO L87 Difference]: Start difference. First operand 3105 states and 14140 transitions. Second operand has 20 states, 20 states have (on average 3.7) internal successors, (74), 19 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:46:15,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:46:15,283 INFO L93 Difference]: Finished difference Result 3772 states and 16519 transitions. [2022-01-18 15:46:15,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-01-18 15:46:15,283 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.7) internal successors, (74), 19 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-01-18 15:46:15,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:46:15,292 INFO L225 Difference]: With dead ends: 3772 [2022-01-18 15:46:15,292 INFO L226 Difference]: Without dead ends: 3750 [2022-01-18 15:46:15,292 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 45 SyntacticMatches, 3 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=162, Invalid=830, Unknown=0, NotChecked=0, Total=992 [2022-01-18 15:46:15,293 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 356 mSDsluCounter, 991 mSDsCounter, 0 mSdLazyCounter, 1296 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 356 SdHoareTripleChecker+Valid, 399 SdHoareTripleChecker+Invalid, 1352 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 1296 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 15:46:15,293 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [356 Valid, 399 Invalid, 1352 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 1296 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-18 15:46:15,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3750 states. [2022-01-18 15:46:15,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3750 to 3063. [2022-01-18 15:46:15,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3063 states, 3062 states have (on average 4.561071195297191) internal successors, (13966), 3062 states have internal predecessors, (13966), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:46:15,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3063 states to 3063 states and 13966 transitions. [2022-01-18 15:46:15,340 INFO L78 Accepts]: Start accepts. Automaton has 3063 states and 13966 transitions. Word has length 29 [2022-01-18 15:46:15,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:46:15,341 INFO L470 AbstractCegarLoop]: Abstraction has 3063 states and 13966 transitions. [2022-01-18 15:46:15,341 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.7) internal successors, (74), 19 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:46:15,341 INFO L276 IsEmpty]: Start isEmpty. Operand 3063 states and 13966 transitions. [2022-01-18 15:46:15,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-01-18 15:46:15,346 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:46:15,346 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, 1, 1, 1, 1, 1] [2022-01-18 15:46:15,361 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (118)] Forceful destruction successful, exit code 0 [2022-01-18 15:46:15,546 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121,118 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:46:15,546 INFO L402 AbstractCegarLoop]: === Iteration 123 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-01-18 15:46:15,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:46:15,546 INFO L85 PathProgramCache]: Analyzing trace with hash -1771622066, now seen corresponding path program 30 times [2022-01-18 15:46:15,546 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:46:15,547 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1313013112] [2022-01-18 15:46:15,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:46:15,547 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:46:15,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:46:15,573 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 15:46:15,573 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:46:15,573 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1313013112] [2022-01-18 15:46:15,573 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1313013112] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:46:15,573 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [288939543] [2022-01-18 15:46:15,573 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 15:46:15,573 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:46:15,573 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:46:15,574 INFO L229 MonitoredProcess]: Starting monitored process 119 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:46:15,574 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (119)] Waiting until timeout for monitored process [2022-01-18 15:46:15,603 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 15:46:15,603 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:46:15,603 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-18 15:46:15,604 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:46:15,649 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 15:46:15,649 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:46:15,691 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 15:46:15,691 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [288939543] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:46:15,691 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:46:15,692 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 6] total 7 [2022-01-18 15:46:15,692 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [860151277] [2022-01-18 15:46:15,692 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:46:15,692 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-01-18 15:46:15,692 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:46:15,692 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-01-18 15:46:15,692 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-01-18 15:46:15,692 INFO L87 Difference]: Start difference. First operand 3063 states and 13966 transitions. Second operand has 8 states, 8 states have (on average 5.5) internal successors, (44), 7 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:46:15,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:46:15,817 INFO L93 Difference]: Finished difference Result 4340 states and 18961 transitions. [2022-01-18 15:46:15,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-01-18 15:46:15,817 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.5) internal successors, (44), 7 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 31 [2022-01-18 15:46:15,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:46:15,846 INFO L225 Difference]: With dead ends: 4340 [2022-01-18 15:46:15,847 INFO L226 Difference]: Without dead ends: 4261 [2022-01-18 15:46:15,847 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 58 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2022-01-18 15:46:15,847 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 138 mSDsluCounter, 210 mSDsCounter, 0 mSdLazyCounter, 198 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 138 SdHoareTripleChecker+Valid, 125 SdHoareTripleChecker+Invalid, 231 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 198 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:46:15,847 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [138 Valid, 125 Invalid, 231 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 198 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 15:46:15,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4261 states. [2022-01-18 15:46:15,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4261 to 3845. [2022-01-18 15:46:15,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3845 states, 3844 states have (on average 4.522372528616025) internal successors, (17384), 3844 states have internal predecessors, (17384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:46:15,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3845 states to 3845 states and 17384 transitions. [2022-01-18 15:46:15,906 INFO L78 Accepts]: Start accepts. Automaton has 3845 states and 17384 transitions. Word has length 31 [2022-01-18 15:46:15,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:46:15,906 INFO L470 AbstractCegarLoop]: Abstraction has 3845 states and 17384 transitions. [2022-01-18 15:46:15,906 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.5) internal successors, (44), 7 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:46:15,906 INFO L276 IsEmpty]: Start isEmpty. Operand 3845 states and 17384 transitions. [2022-01-18 15:46:15,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-01-18 15:46:15,913 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:46:15,913 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, 1, 1, 1, 1, 1] [2022-01-18 15:46:15,929 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (119)] Forceful destruction successful, exit code 0 [2022-01-18 15:46:16,113 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable122 [2022-01-18 15:46:16,113 INFO L402 AbstractCegarLoop]: === Iteration 124 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-01-18 15:46:16,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:46:16,114 INFO L85 PathProgramCache]: Analyzing trace with hash 1488366286, now seen corresponding path program 31 times [2022-01-18 15:46:16,114 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:46:16,114 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1868518796] [2022-01-18 15:46:16,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:46:16,114 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:46:16,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:46:16,135 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 15:46:16,135 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:46:16,135 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1868518796] [2022-01-18 15:46:16,135 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1868518796] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:46:16,135 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [982970683] [2022-01-18 15:46:16,135 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 15:46:16,135 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:46:16,135 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:46:16,136 INFO L229 MonitoredProcess]: Starting monitored process 120 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:46:16,136 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (120)] Waiting until timeout for monitored process [2022-01-18 15:46:16,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:46:16,165 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-18 15:46:16,165 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:46:16,208 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 15:46:16,208 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:46:16,252 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 15:46:16,252 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [982970683] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:46:16,252 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:46:16,252 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 7 [2022-01-18 15:46:16,252 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1854968982] [2022-01-18 15:46:16,252 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:46:16,252 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-01-18 15:46:16,252 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:46:16,252 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-01-18 15:46:16,253 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2022-01-18 15:46:16,253 INFO L87 Difference]: Start difference. First operand 3845 states and 17384 transitions. Second operand has 8 states, 8 states have (on average 5.25) internal successors, (42), 7 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:46:16,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:46:16,353 INFO L93 Difference]: Finished difference Result 4766 states and 20563 transitions. [2022-01-18 15:46:16,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-18 15:46:16,353 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.25) internal successors, (42), 7 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2022-01-18 15:46:16,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:46:16,364 INFO L225 Difference]: With dead ends: 4766 [2022-01-18 15:46:16,364 INFO L226 Difference]: Without dead ends: 4649 [2022-01-18 15:46:16,365 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 58 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2022-01-18 15:46:16,365 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 216 mSDsluCounter, 126 mSDsCounter, 0 mSdLazyCounter, 123 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 216 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 143 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 123 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:46:16,365 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [216 Valid, 96 Invalid, 143 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 123 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 15:46:16,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4649 states. [2022-01-18 15:46:16,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4649 to 3802. [2022-01-18 15:46:16,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3802 states, 3801 states have (on average 4.468297816364115) internal successors, (16984), 3801 states have internal predecessors, (16984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:46:16,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3802 states to 3802 states and 16984 transitions. [2022-01-18 15:46:16,440 INFO L78 Accepts]: Start accepts. Automaton has 3802 states and 16984 transitions. Word has length 31 [2022-01-18 15:46:16,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:46:16,441 INFO L470 AbstractCegarLoop]: Abstraction has 3802 states and 16984 transitions. [2022-01-18 15:46:16,441 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.25) internal successors, (42), 7 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:46:16,441 INFO L276 IsEmpty]: Start isEmpty. Operand 3802 states and 16984 transitions. [2022-01-18 15:46:16,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-01-18 15:46:16,448 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:46:16,448 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, 1, 1, 1, 1, 1] [2022-01-18 15:46:16,463 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (120)] Ended with exit code 0 [2022-01-18 15:46:16,648 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 120 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable123 [2022-01-18 15:46:16,648 INFO L402 AbstractCegarLoop]: === Iteration 125 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-01-18 15:46:16,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:46:16,648 INFO L85 PathProgramCache]: Analyzing trace with hash -1280168432, now seen corresponding path program 32 times [2022-01-18 15:46:16,649 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:46:16,649 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1507794136] [2022-01-18 15:46:16,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:46:16,649 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:46:16,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:46:16,674 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 15:46:16,674 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:46:16,674 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1507794136] [2022-01-18 15:46:16,674 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1507794136] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:46:16,674 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [637597191] [2022-01-18 15:46:16,674 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 15:46:16,675 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:46:16,675 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:46:16,675 INFO L229 MonitoredProcess]: Starting monitored process 121 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:46:16,676 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (121)] Waiting until timeout for monitored process [2022-01-18 15:46:16,706 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:46:16,706 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:46:16,707 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-18 15:46:16,707 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:46:16,769 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 15:46:16,769 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:46:16,817 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 15:46:16,817 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [637597191] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:46:16,817 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:46:16,817 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 10 [2022-01-18 15:46:16,817 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [233364885] [2022-01-18 15:46:16,817 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:46:16,817 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-01-18 15:46:16,817 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:46:16,818 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-01-18 15:46:16,818 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2022-01-18 15:46:16,818 INFO L87 Difference]: Start difference. First operand 3802 states and 16984 transitions. Second operand has 11 states, 11 states have (on average 4.545454545454546) internal successors, (50), 10 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:46:17,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:46:17,148 INFO L93 Difference]: Finished difference Result 6625 states and 27941 transitions. [2022-01-18 15:46:17,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-01-18 15:46:17,149 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.545454545454546) internal successors, (50), 10 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2022-01-18 15:46:17,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:46:17,166 INFO L225 Difference]: With dead ends: 6625 [2022-01-18 15:46:17,166 INFO L226 Difference]: Without dead ends: 6329 [2022-01-18 15:46:17,166 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 56 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=117, Invalid=345, Unknown=0, NotChecked=0, Total=462 [2022-01-18 15:46:17,166 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 331 mSDsluCounter, 747 mSDsCounter, 0 mSdLazyCounter, 583 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 331 SdHoareTripleChecker+Valid, 415 SdHoareTripleChecker+Invalid, 630 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 583 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:46:17,166 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [331 Valid, 415 Invalid, 630 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 583 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:46:17,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6329 states. [2022-01-18 15:46:17,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6329 to 5398. [2022-01-18 15:46:17,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5398 states, 5397 states have (on average 4.405039836946452) internal successors, (23774), 5397 states have internal predecessors, (23774), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:46:17,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5398 states to 5398 states and 23774 transitions. [2022-01-18 15:46:17,303 INFO L78 Accepts]: Start accepts. Automaton has 5398 states and 23774 transitions. Word has length 31 [2022-01-18 15:46:17,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:46:17,303 INFO L470 AbstractCegarLoop]: Abstraction has 5398 states and 23774 transitions. [2022-01-18 15:46:17,303 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.545454545454546) internal successors, (50), 10 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:46:17,303 INFO L276 IsEmpty]: Start isEmpty. Operand 5398 states and 23774 transitions. [2022-01-18 15:46:17,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-01-18 15:46:17,312 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:46:17,312 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, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:46:17,335 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (121)] Ended with exit code 0 [2022-01-18 15:46:17,512 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,SelfDestructingSolverStorable124 [2022-01-18 15:46:17,513 INFO L402 AbstractCegarLoop]: === Iteration 126 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-01-18 15:46:17,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:46:17,513 INFO L85 PathProgramCache]: Analyzing trace with hash -1366492460, now seen corresponding path program 33 times [2022-01-18 15:46:17,513 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:46:17,513 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1413210680] [2022-01-18 15:46:17,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:46:17,513 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:46:17,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:46:17,537 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 15:46:17,537 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:46:17,537 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1413210680] [2022-01-18 15:46:17,537 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1413210680] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:46:17,537 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [109644944] [2022-01-18 15:46:17,537 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 15:46:17,537 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:46:17,537 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:46:17,538 INFO L229 MonitoredProcess]: Starting monitored process 122 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:46:17,539 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (122)] Waiting until timeout for monitored process [2022-01-18 15:46:17,570 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-01-18 15:46:17,570 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:46:17,570 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-18 15:46:17,571 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:46:17,619 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 15:46:17,620 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:46:17,666 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 15:46:17,666 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [109644944] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:46:17,666 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:46:17,666 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 7 [2022-01-18 15:46:17,666 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [978852519] [2022-01-18 15:46:17,666 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:46:17,666 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-01-18 15:46:17,666 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:46:17,666 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-01-18 15:46:17,667 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-01-18 15:46:17,667 INFO L87 Difference]: Start difference. First operand 5398 states and 23774 transitions. Second operand has 8 states, 8 states have (on average 5.875) internal successors, (47), 7 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 15:46:17,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:46:17,811 INFO L93 Difference]: Finished difference Result 6291 states and 26930 transitions. [2022-01-18 15:46:17,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-01-18 15:46:17,812 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.875) internal successors, (47), 7 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 31 [2022-01-18 15:46:17,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:46:17,826 INFO L225 Difference]: With dead ends: 6291 [2022-01-18 15:46:17,827 INFO L226 Difference]: Without dead ends: 6219 [2022-01-18 15:46:17,827 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 58 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2022-01-18 15:46:17,827 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 143 mSDsluCounter, 180 mSDsCounter, 0 mSdLazyCounter, 194 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 143 SdHoareTripleChecker+Valid, 119 SdHoareTripleChecker+Invalid, 218 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 194 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:46:17,827 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [143 Valid, 119 Invalid, 218 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 194 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 15:46:17,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6219 states. [2022-01-18 15:46:17,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6219 to 5455. [2022-01-18 15:46:17,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5455 states, 5454 states have (on average 4.364869820315365) internal successors, (23806), 5454 states have internal predecessors, (23806), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:46:17,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5455 states to 5455 states and 23806 transitions. [2022-01-18 15:46:17,923 INFO L78 Accepts]: Start accepts. Automaton has 5455 states and 23806 transitions. Word has length 31 [2022-01-18 15:46:17,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:46:17,923 INFO L470 AbstractCegarLoop]: Abstraction has 5455 states and 23806 transitions. [2022-01-18 15:46:17,923 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.875) internal successors, (47), 7 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 15:46:17,923 INFO L276 IsEmpty]: Start isEmpty. Operand 5455 states and 23806 transitions. [2022-01-18 15:46:17,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-01-18 15:46:17,932 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:46:17,932 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, 1, 1, 1, 1, 1] [2022-01-18 15:46:17,947 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (122)] Ended with exit code 0 [2022-01-18 15:46:18,132 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,SelfDestructingSolverStorable125 [2022-01-18 15:46:18,133 INFO L402 AbstractCegarLoop]: === Iteration 127 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-01-18 15:46:18,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:46:18,133 INFO L85 PathProgramCache]: Analyzing trace with hash -540684862, now seen corresponding path program 34 times [2022-01-18 15:46:18,133 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:46:18,133 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1078994939] [2022-01-18 15:46:18,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:46:18,133 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:46:18,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:46:18,154 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 15:46:18,154 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:46:18,154 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1078994939] [2022-01-18 15:46:18,154 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1078994939] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:46:18,154 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1584782956] [2022-01-18 15:46:18,154 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 15:46:18,155 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:46:18,155 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:46:18,155 INFO L229 MonitoredProcess]: Starting monitored process 123 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:46:18,156 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (123)] Waiting until timeout for monitored process [2022-01-18 15:46:18,188 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 15:46:18,188 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:46:18,188 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-18 15:46:18,189 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:46:18,230 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 15:46:18,230 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:46:18,271 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 15:46:18,271 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1584782956] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:46:18,271 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:46:18,271 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4, 4] total 7 [2022-01-18 15:46:18,271 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [90378890] [2022-01-18 15:46:18,271 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:46:18,271 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-01-18 15:46:18,272 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:46:18,272 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-01-18 15:46:18,272 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2022-01-18 15:46:18,272 INFO L87 Difference]: Start difference. First operand 5455 states and 23806 transitions. Second operand has 8 states, 8 states have (on average 5.5) internal successors, (44), 7 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:46:18,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:46:18,379 INFO L93 Difference]: Finished difference Result 7534 states and 32027 transitions. [2022-01-18 15:46:18,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-18 15:46:18,379 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.5) internal successors, (44), 7 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 31 [2022-01-18 15:46:18,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:46:18,397 INFO L225 Difference]: With dead ends: 7534 [2022-01-18 15:46:18,397 INFO L226 Difference]: Without dead ends: 7474 [2022-01-18 15:46:18,397 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 59 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2022-01-18 15:46:18,397 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 181 mSDsluCounter, 188 mSDsCounter, 0 mSdLazyCounter, 172 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 181 SdHoareTripleChecker+Valid, 125 SdHoareTripleChecker+Invalid, 190 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 172 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:46:18,397 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [181 Valid, 125 Invalid, 190 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 172 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 15:46:18,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7474 states. [2022-01-18 15:46:18,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7474 to 6583. [2022-01-18 15:46:18,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6583 states, 6582 states have (on average 4.39364934670313) internal successors, (28919), 6582 states have internal predecessors, (28919), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:46:18,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6583 states to 6583 states and 28919 transitions. [2022-01-18 15:46:18,549 INFO L78 Accepts]: Start accepts. Automaton has 6583 states and 28919 transitions. Word has length 31 [2022-01-18 15:46:18,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:46:18,549 INFO L470 AbstractCegarLoop]: Abstraction has 6583 states and 28919 transitions. [2022-01-18 15:46:18,549 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.5) internal successors, (44), 7 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:46:18,549 INFO L276 IsEmpty]: Start isEmpty. Operand 6583 states and 28919 transitions. [2022-01-18 15:46:18,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-01-18 15:46:18,561 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:46:18,561 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, 1, 1, 1, 1, 1] [2022-01-18 15:46:18,577 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (123)] Forceful destruction successful, exit code 0 [2022-01-18 15:46:18,762 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126,123 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:46:18,763 INFO L402 AbstractCegarLoop]: === Iteration 128 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-01-18 15:46:18,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:46:18,764 INFO L85 PathProgramCache]: Analyzing trace with hash 552518790, now seen corresponding path program 35 times [2022-01-18 15:46:18,764 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:46:18,764 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1819874310] [2022-01-18 15:46:18,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:46:18,764 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:46:18,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:46:18,785 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 15:46:18,785 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:46:18,785 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1819874310] [2022-01-18 15:46:18,785 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1819874310] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:46:18,785 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1116906595] [2022-01-18 15:46:18,785 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 15:46:18,785 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:46:18,785 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:46:18,786 INFO L229 MonitoredProcess]: Starting monitored process 124 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:46:18,787 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (124)] Waiting until timeout for monitored process [2022-01-18 15:46:18,815 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 15:46:18,815 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:46:18,816 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-18 15:46:18,816 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:46:18,855 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 15:46:18,855 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:46:18,894 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 15:46:18,894 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1116906595] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:46:18,894 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:46:18,894 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 6 [2022-01-18 15:46:18,894 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1998289267] [2022-01-18 15:46:18,894 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:46:18,895 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-01-18 15:46:18,895 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:46:18,895 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-01-18 15:46:18,895 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-01-18 15:46:18,895 INFO L87 Difference]: Start difference. First operand 6583 states and 28919 transitions. Second operand has 7 states, 7 states have (on average 5.571428571428571) internal successors, (39), 6 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:46:19,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:46:19,009 INFO L93 Difference]: Finished difference Result 8243 states and 34954 transitions. [2022-01-18 15:46:19,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-18 15:46:19,009 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.571428571428571) internal successors, (39), 6 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 31 [2022-01-18 15:46:19,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:46:19,030 INFO L225 Difference]: With dead ends: 8243 [2022-01-18 15:46:19,030 INFO L226 Difference]: Without dead ends: 8171 [2022-01-18 15:46:19,030 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 59 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=32, Invalid=40, Unknown=0, NotChecked=0, Total=72 [2022-01-18 15:46:19,031 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 179 mSDsluCounter, 121 mSDsCounter, 0 mSdLazyCounter, 125 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 179 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 162 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 125 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:46:19,031 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [179 Valid, 88 Invalid, 162 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 125 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 15:46:19,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8171 states. [2022-01-18 15:46:19,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8171 to 6493. [2022-01-18 15:46:19,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6493 states, 6492 states have (on average 4.386167590881084) internal successors, (28475), 6492 states have internal predecessors, (28475), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:46:19,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6493 states to 6493 states and 28475 transitions. [2022-01-18 15:46:19,158 INFO L78 Accepts]: Start accepts. Automaton has 6493 states and 28475 transitions. Word has length 31 [2022-01-18 15:46:19,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:46:19,158 INFO L470 AbstractCegarLoop]: Abstraction has 6493 states and 28475 transitions. [2022-01-18 15:46:19,159 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.571428571428571) internal successors, (39), 6 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:46:19,159 INFO L276 IsEmpty]: Start isEmpty. Operand 6493 states and 28475 transitions. [2022-01-18 15:46:19,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-01-18 15:46:19,171 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:46:19,171 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, 1, 1, 1, 1, 1] [2022-01-18 15:46:19,188 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (124)] Ended with exit code 0 [2022-01-18 15:46:19,383 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127,124 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:46:19,383 INFO L402 AbstractCegarLoop]: === Iteration 129 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-01-18 15:46:19,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:46:19,383 INFO L85 PathProgramCache]: Analyzing trace with hash 891076900, now seen corresponding path program 36 times [2022-01-18 15:46:19,383 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:46:19,383 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1963469261] [2022-01-18 15:46:19,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:46:19,383 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:46:19,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:46:19,401 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 15:46:19,401 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:46:19,401 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1963469261] [2022-01-18 15:46:19,401 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1963469261] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:46:19,401 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [442286945] [2022-01-18 15:46:19,401 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 15:46:19,401 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:46:19,401 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:46:19,403 INFO L229 MonitoredProcess]: Starting monitored process 125 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:46:19,404 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (125)] Waiting until timeout for monitored process [2022-01-18 15:46:19,433 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 15:46:19,433 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:46:19,433 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-18 15:46:19,434 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:46:19,478 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 15:46:19,478 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:46:19,520 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 15:46:19,520 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [442286945] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:46:19,520 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:46:19,520 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 6] total 7 [2022-01-18 15:46:19,520 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1462557024] [2022-01-18 15:46:19,520 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:46:19,520 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-01-18 15:46:19,520 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:46:19,520 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-01-18 15:46:19,521 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-01-18 15:46:19,521 INFO L87 Difference]: Start difference. First operand 6493 states and 28475 transitions. Second operand has 8 states, 8 states have (on average 5.25) internal successors, (42), 7 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:46:19,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:46:19,660 INFO L93 Difference]: Finished difference Result 8162 states and 34539 transitions. [2022-01-18 15:46:19,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-01-18 15:46:19,660 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.25) internal successors, (42), 7 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2022-01-18 15:46:19,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:46:19,680 INFO L225 Difference]: With dead ends: 8162 [2022-01-18 15:46:19,680 INFO L226 Difference]: Without dead ends: 8084 [2022-01-18 15:46:19,681 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 58 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2022-01-18 15:46:19,681 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 155 mSDsluCounter, 189 mSDsCounter, 0 mSdLazyCounter, 184 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 155 SdHoareTripleChecker+Valid, 120 SdHoareTripleChecker+Invalid, 214 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 184 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:46:19,681 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [155 Valid, 120 Invalid, 214 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 184 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 15:46:19,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8084 states. [2022-01-18 15:46:19,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8084 to 6864. [2022-01-18 15:46:19,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6864 states, 6863 states have (on average 4.390936908057701) internal successors, (30135), 6863 states have internal predecessors, (30135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:46:19,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6864 states to 6864 states and 30135 transitions. [2022-01-18 15:46:19,836 INFO L78 Accepts]: Start accepts. Automaton has 6864 states and 30135 transitions. Word has length 31 [2022-01-18 15:46:19,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:46:19,836 INFO L470 AbstractCegarLoop]: Abstraction has 6864 states and 30135 transitions. [2022-01-18 15:46:19,836 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.25) internal successors, (42), 7 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:46:19,836 INFO L276 IsEmpty]: Start isEmpty. Operand 6864 states and 30135 transitions. [2022-01-18 15:46:19,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-01-18 15:46:19,849 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:46:19,849 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, 1, 1, 1, 1, 1] [2022-01-18 15:46:19,864 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (125)] Ended with exit code 0 [2022-01-18 15:46:20,049 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,SelfDestructingSolverStorable128 [2022-01-18 15:46:20,049 INFO L402 AbstractCegarLoop]: === Iteration 130 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-01-18 15:46:20,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:46:20,049 INFO L85 PathProgramCache]: Analyzing trace with hash -457763008, now seen corresponding path program 37 times [2022-01-18 15:46:20,049 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:46:20,050 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1211470213] [2022-01-18 15:46:20,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:46:20,050 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:46:20,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:46:20,069 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:46:20,069 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:46:20,069 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1211470213] [2022-01-18 15:46:20,070 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1211470213] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:46:20,070 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2145078368] [2022-01-18 15:46:20,070 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 15:46:20,070 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:46:20,070 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:46:20,070 INFO L229 MonitoredProcess]: Starting monitored process 126 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:46:20,071 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (126)] Waiting until timeout for monitored process [2022-01-18 15:46:20,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:46:20,101 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-18 15:46:20,101 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:46:20,147 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 15:46:20,148 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:46:20,188 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 15:46:20,188 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2145078368] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:46:20,188 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:46:20,188 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 8 [2022-01-18 15:46:20,188 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1452611232] [2022-01-18 15:46:20,188 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:46:20,188 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-01-18 15:46:20,188 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:46:20,189 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-01-18 15:46:20,189 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2022-01-18 15:46:20,189 INFO L87 Difference]: Start difference. First operand 6864 states and 30135 transitions. Second operand has 9 states, 9 states have (on average 4.555555555555555) internal successors, (41), 8 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:46:20,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:46:20,416 INFO L93 Difference]: Finished difference Result 8640 states and 36644 transitions. [2022-01-18 15:46:20,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-18 15:46:20,416 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.555555555555555) internal successors, (41), 8 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 31 [2022-01-18 15:46:20,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:46:20,437 INFO L225 Difference]: With dead ends: 8640 [2022-01-18 15:46:20,437 INFO L226 Difference]: Without dead ends: 8442 [2022-01-18 15:46:20,437 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 57 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=61, Invalid=121, Unknown=0, NotChecked=0, Total=182 [2022-01-18 15:46:20,437 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 165 mSDsluCounter, 480 mSDsCounter, 0 mSdLazyCounter, 408 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 165 SdHoareTripleChecker+Valid, 274 SdHoareTripleChecker+Invalid, 422 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 408 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:46:20,437 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [165 Valid, 274 Invalid, 422 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 408 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:46:20,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8442 states. [2022-01-18 15:46:20,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8442 to 7525. [2022-01-18 15:46:20,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7525 states, 7524 states have (on average 4.365629984051036) internal successors, (32847), 7524 states have internal predecessors, (32847), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:46:20,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7525 states to 7525 states and 32847 transitions. [2022-01-18 15:46:20,656 INFO L78 Accepts]: Start accepts. Automaton has 7525 states and 32847 transitions. Word has length 31 [2022-01-18 15:46:20,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:46:20,656 INFO L470 AbstractCegarLoop]: Abstraction has 7525 states and 32847 transitions. [2022-01-18 15:46:20,656 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.555555555555555) internal successors, (41), 8 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:46:20,656 INFO L276 IsEmpty]: Start isEmpty. Operand 7525 states and 32847 transitions. [2022-01-18 15:46:20,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 15:46:20,679 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:46:20,679 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, 1, 1, 1, 1, 1] [2022-01-18 15:46:20,701 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 15:46:20,879 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,SelfDestructingSolverStorable129 [2022-01-18 15:46:20,879 INFO L402 AbstractCegarLoop]: === Iteration 131 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-01-18 15:46:20,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:46:20,880 INFO L85 PathProgramCache]: Analyzing trace with hash -1383538257, now seen corresponding path program 38 times [2022-01-18 15:46:20,880 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:46:20,880 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [619393837] [2022-01-18 15:46:20,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:46:20,880 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:46:20,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:46:21,074 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 15:46:21,074 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:46:21,074 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [619393837] [2022-01-18 15:46:21,075 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [619393837] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:46:21,075 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1021670274] [2022-01-18 15:46:21,075 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 15:46:21,075 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:46:21,075 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:46:21,076 INFO L229 MonitoredProcess]: Starting monitored process 127 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:46:21,080 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (127)] Waiting until timeout for monitored process [2022-01-18 15:46:21,108 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:46:21,108 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:46:21,109 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2022-01-18 15:46:21,109 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:46:21,504 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:46:21,504 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 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2022-01-18 15:46:22,164 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 15:46:22,164 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:46:22,356 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:46:22,356 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 22 [2022-01-18 15:46:22,365 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:46:22,365 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 7 [2022-01-18 15:46:22,409 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 15:46:22,409 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1021670274] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:46:22,409 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:46:22,409 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 29 [2022-01-18 15:46:22,409 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2025616610] [2022-01-18 15:46:22,409 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:46:22,409 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-01-18 15:46:22,409 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:46:22,409 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-01-18 15:46:22,409 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=792, Unknown=0, NotChecked=0, Total=870 [2022-01-18 15:46:22,410 INFO L87 Difference]: Start difference. First operand 7525 states and 32847 transitions. Second operand has 30 states, 30 states have (on average 2.2666666666666666) 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 15:46:23,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:46:23,972 INFO L93 Difference]: Finished difference Result 8385 states and 36348 transitions. [2022-01-18 15:46:23,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-01-18 15:46:23,972 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.2666666666666666) 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 33 [2022-01-18 15:46:23,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:46:23,996 INFO L225 Difference]: With dead ends: 8385 [2022-01-18 15:46:23,996 INFO L226 Difference]: Without dead ends: 8374 [2022-01-18 15:46:23,996 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 46 SyntacticMatches, 8 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 296 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=176, Invalid=1464, Unknown=0, NotChecked=0, Total=1640 [2022-01-18 15:46:23,996 INFO L933 BasicCegarLoop]: 53 mSDtfsCounter, 278 mSDsluCounter, 2353 mSDsCounter, 0 mSdLazyCounter, 2634 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 278 SdHoareTripleChecker+Valid, 921 SdHoareTripleChecker+Invalid, 2894 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 2634 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 230 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-01-18 15:46:23,996 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [278 Valid, 921 Invalid, 2894 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 2634 Invalid, 0 Unknown, 230 Unchecked, 1.0s Time] [2022-01-18 15:46:24,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8374 states. [2022-01-18 15:46:24,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8374 to 7658. [2022-01-18 15:46:24,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7658 states, 7657 states have (on average 4.354969309128902) internal successors, (33346), 7657 states have internal predecessors, (33346), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:46:24,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7658 states to 7658 states and 33346 transitions. [2022-01-18 15:46:24,142 INFO L78 Accepts]: Start accepts. Automaton has 7658 states and 33346 transitions. Word has length 33 [2022-01-18 15:46:24,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:46:24,142 INFO L470 AbstractCegarLoop]: Abstraction has 7658 states and 33346 transitions. [2022-01-18 15:46:24,142 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.2666666666666666) 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 15:46:24,142 INFO L276 IsEmpty]: Start isEmpty. Operand 7658 states and 33346 transitions. [2022-01-18 15:46:24,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 15:46:24,156 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:46:24,156 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, 1, 1, 1, 1, 1] [2022-01-18 15:46:24,175 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 15:46:24,371 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130,127 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:46:24,371 INFO L402 AbstractCegarLoop]: === Iteration 132 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-01-18 15:46:24,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:46:24,371 INFO L85 PathProgramCache]: Analyzing trace with hash 565140729, now seen corresponding path program 39 times [2022-01-18 15:46:24,371 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:46:24,372 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1761020493] [2022-01-18 15:46:24,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:46:24,372 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:46:24,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:46:24,545 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 15:46:24,545 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:46:24,546 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1761020493] [2022-01-18 15:46:24,546 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1761020493] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:46:24,546 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1759436636] [2022-01-18 15:46:24,546 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 15:46:24,546 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:46:24,546 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:46:24,547 INFO L229 MonitoredProcess]: Starting monitored process 128 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:46:24,548 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (128)] Waiting until timeout for monitored process [2022-01-18 15:46:24,579 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 15:46:24,579 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:46:24,580 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 43 conjunts are in the unsatisfiable core [2022-01-18 15:46:24,581 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:46:24,970 INFO L353 Elim1Store]: treesize reduction 12, result has 74.5 percent of original size [2022-01-18 15:46:24,971 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 26 treesize of output 50 [2022-01-18 15:46:25,120 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 15:46:25,120 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:46:25,534 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 15:46:25,535 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1759436636] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:46:25,535 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:46:25,535 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 35 [2022-01-18 15:46:25,535 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2024155115] [2022-01-18 15:46:25,535 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:46:25,535 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-01-18 15:46:25,535 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:46:25,535 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-01-18 15:46:25,535 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=1155, Unknown=0, NotChecked=0, Total=1260 [2022-01-18 15:46:25,535 INFO L87 Difference]: Start difference. First operand 7658 states and 33346 transitions. Second operand has 36 states, 36 states have (on average 2.3333333333333335) internal successors, (84), 35 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:46:29,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:46:29,389 INFO L93 Difference]: Finished difference Result 9540 states and 40443 transitions. [2022-01-18 15:46:29,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2022-01-18 15:46:29,389 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.3333333333333335) internal successors, (84), 35 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 15:46:29,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:46:29,413 INFO L225 Difference]: With dead ends: 9540 [2022-01-18 15:46:29,413 INFO L226 Difference]: Without dead ends: 9494 [2022-01-18 15:46:29,413 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 41 SyntacticMatches, 3 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1268 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=577, Invalid=6065, Unknown=0, NotChecked=0, Total=6642 [2022-01-18 15:46:29,414 INFO L933 BasicCegarLoop]: 52 mSDtfsCounter, 1049 mSDsluCounter, 3266 mSDsCounter, 0 mSdLazyCounter, 4102 mSolverCounterSat, 163 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1049 SdHoareTripleChecker+Valid, 1221 SdHoareTripleChecker+Invalid, 4265 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 163 IncrementalHoareTripleChecker+Valid, 4102 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-01-18 15:46:29,414 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1049 Valid, 1221 Invalid, 4265 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [163 Valid, 4102 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-01-18 15:46:29,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9494 states. [2022-01-18 15:46:29,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9494 to 7670. [2022-01-18 15:46:29,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7670 states, 7669 states have (on average 4.362759160255575) internal successors, (33458), 7669 states have internal predecessors, (33458), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:46:29,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7670 states to 7670 states and 33458 transitions. [2022-01-18 15:46:29,556 INFO L78 Accepts]: Start accepts. Automaton has 7670 states and 33458 transitions. Word has length 33 [2022-01-18 15:46:29,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:46:29,556 INFO L470 AbstractCegarLoop]: Abstraction has 7670 states and 33458 transitions. [2022-01-18 15:46:29,556 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 2.3333333333333335) internal successors, (84), 35 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:46:29,556 INFO L276 IsEmpty]: Start isEmpty. Operand 7670 states and 33458 transitions. [2022-01-18 15:46:29,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 15:46:29,570 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:46:29,570 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, 1, 1, 1, 1, 1] [2022-01-18 15:46:29,585 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (128)] Ended with exit code 0 [2022-01-18 15:46:29,770 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131,128 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:46:29,770 INFO L402 AbstractCegarLoop]: === Iteration 133 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-01-18 15:46:29,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:46:29,771 INFO L85 PathProgramCache]: Analyzing trace with hash 692613113, now seen corresponding path program 40 times [2022-01-18 15:46:29,771 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:46:29,771 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [768831923] [2022-01-18 15:46:29,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:46:29,771 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:46:29,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:46:29,938 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 15:46:29,939 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:46:29,939 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [768831923] [2022-01-18 15:46:29,939 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [768831923] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:46:29,939 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1576692407] [2022-01-18 15:46:29,939 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 15:46:29,939 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:46:29,939 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:46:29,940 INFO L229 MonitoredProcess]: Starting monitored process 129 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:46:29,941 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (129)] Waiting until timeout for monitored process [2022-01-18 15:46:29,969 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 15:46:29,970 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:46:29,970 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2022-01-18 15:46:29,971 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:46:30,363 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:46:30,364 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 21 [2022-01-18 15:46:30,445 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 15:46:30,445 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:46:30,761 INFO L353 Elim1Store]: treesize reduction 36, result has 50.7 percent of original size [2022-01-18 15:46:30,761 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 27 treesize of output 48 [2022-01-18 15:46:30,843 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:46:30,843 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:46:30,844 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:46:30,844 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:46:30,845 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 27 treesize of output 7 [2022-01-18 15:46:30,890 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 15:46:30,890 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1576692407] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:46:30,890 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:46:30,890 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 32 [2022-01-18 15:46:30,890 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [437161615] [2022-01-18 15:46:30,890 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:46:30,890 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-01-18 15:46:30,890 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:46:30,891 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-01-18 15:46:30,891 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=975, Unknown=0, NotChecked=0, Total=1056 [2022-01-18 15:46:30,891 INFO L87 Difference]: Start difference. First operand 7670 states and 33458 transitions. Second operand has 33 states, 33 states have (on average 2.515151515151515) internal successors, (83), 32 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:46:32,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:46:32,829 INFO L93 Difference]: Finished difference Result 8309 states and 35933 transitions. [2022-01-18 15:46:32,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-01-18 15:46:32,829 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.515151515151515) internal successors, (83), 32 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 15:46:32,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:46:32,850 INFO L225 Difference]: With dead ends: 8309 [2022-01-18 15:46:32,850 INFO L226 Difference]: Without dead ends: 8290 [2022-01-18 15:46:32,851 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 43 SyntacticMatches, 4 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 349 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=202, Invalid=2248, Unknown=0, NotChecked=0, Total=2450 [2022-01-18 15:46:32,851 INFO L933 BasicCegarLoop]: 53 mSDtfsCounter, 326 mSDsluCounter, 2771 mSDsCounter, 0 mSdLazyCounter, 3477 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 326 SdHoareTripleChecker+Valid, 1073 SdHoareTripleChecker+Invalid, 3501 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 3477 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-01-18 15:46:32,851 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [326 Valid, 1073 Invalid, 3501 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 3477 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-01-18 15:46:32,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8290 states. [2022-01-18 15:46:32,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8290 to 7729. [2022-01-18 15:46:32,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7729 states, 7728 states have (on average 4.359989648033126) internal successors, (33694), 7728 states have internal predecessors, (33694), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:46:32,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7729 states to 7729 states and 33694 transitions. [2022-01-18 15:46:32,989 INFO L78 Accepts]: Start accepts. Automaton has 7729 states and 33694 transitions. Word has length 33 [2022-01-18 15:46:32,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:46:32,989 INFO L470 AbstractCegarLoop]: Abstraction has 7729 states and 33694 transitions. [2022-01-18 15:46:32,989 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.515151515151515) internal successors, (83), 32 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:46:32,989 INFO L276 IsEmpty]: Start isEmpty. Operand 7729 states and 33694 transitions. [2022-01-18 15:46:33,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 15:46:33,002 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:46:33,003 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, 1, 1, 1, 1, 1] [2022-01-18 15:46:33,018 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (129)] Ended with exit code 0 [2022-01-18 15:46:33,203 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132,129 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:46:33,203 INFO L402 AbstractCegarLoop]: === Iteration 134 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-01-18 15:46:33,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:46:33,203 INFO L85 PathProgramCache]: Analyzing trace with hash 241367945, now seen corresponding path program 41 times [2022-01-18 15:46:33,203 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:46:33,203 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1747331698] [2022-01-18 15:46:33,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:46:33,203 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:46:33,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:46:33,435 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 15:46:33,435 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:46:33,435 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1747331698] [2022-01-18 15:46:33,435 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1747331698] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:46:33,435 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1738065201] [2022-01-18 15:46:33,435 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 15:46:33,435 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:46:33,435 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:46:33,436 INFO L229 MonitoredProcess]: Starting monitored process 130 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:46:33,437 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (130)] Waiting until timeout for monitored process [2022-01-18 15:46:33,467 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 15:46:33,467 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:46:33,468 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2022-01-18 15:46:33,469 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:46:33,908 INFO L353 Elim1Store]: treesize reduction 48, result has 12.7 percent of original size [2022-01-18 15:46:33,909 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 6 new quantified variables, introduced 6 case distinctions, treesize of input 81 treesize of output 63 [2022-01-18 15:46:33,999 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 15:46:34,000 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:46:34,327 INFO L353 Elim1Store]: treesize reduction 36, result has 50.7 percent of original size [2022-01-18 15:46:34,328 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 27 treesize of output 48 [2022-01-18 15:46:34,393 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:46:34,393 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:46:34,394 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:46:34,394 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:46:34,395 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 27 treesize of output 7 [2022-01-18 15:46:34,443 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 15:46:34,443 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1738065201] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:46:34,443 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:46:34,443 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 32 [2022-01-18 15:46:34,443 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [521200567] [2022-01-18 15:46:34,443 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:46:34,443 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-01-18 15:46:34,443 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:46:34,444 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-01-18 15:46:34,444 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=971, Unknown=0, NotChecked=0, Total=1056 [2022-01-18 15:46:34,444 INFO L87 Difference]: Start difference. First operand 7729 states and 33694 transitions. Second operand has 33 states, 33 states have (on average 2.515151515151515) internal successors, (83), 32 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:46:36,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:46:36,386 INFO L93 Difference]: Finished difference Result 8675 states and 37341 transitions. [2022-01-18 15:46:36,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-01-18 15:46:36,387 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.515151515151515) internal successors, (83), 32 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 15:46:36,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:46:36,408 INFO L225 Difference]: With dead ends: 8675 [2022-01-18 15:46:36,408 INFO L226 Difference]: Without dead ends: 8664 [2022-01-18 15:46:36,408 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 43 SyntacticMatches, 4 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 435 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=219, Invalid=2537, Unknown=0, NotChecked=0, Total=2756 [2022-01-18 15:46:36,408 INFO L933 BasicCegarLoop]: 69 mSDtfsCounter, 399 mSDsluCounter, 3025 mSDsCounter, 0 mSdLazyCounter, 3484 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 399 SdHoareTripleChecker+Valid, 1339 SdHoareTripleChecker+Invalid, 3710 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 3484 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 201 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-01-18 15:46:36,409 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [399 Valid, 1339 Invalid, 3710 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 3484 Invalid, 0 Unknown, 201 Unchecked, 1.3s Time] [2022-01-18 15:46:36,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8664 states. [2022-01-18 15:46:36,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8664 to 7829. [2022-01-18 15:46:36,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7829 states, 7828 states have (on average 4.357051609606541) internal successors, (34107), 7828 states have internal predecessors, (34107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:46:36,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7829 states to 7829 states and 34107 transitions. [2022-01-18 15:46:36,580 INFO L78 Accepts]: Start accepts. Automaton has 7829 states and 34107 transitions. Word has length 33 [2022-01-18 15:46:36,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:46:36,580 INFO L470 AbstractCegarLoop]: Abstraction has 7829 states and 34107 transitions. [2022-01-18 15:46:36,580 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.515151515151515) internal successors, (83), 32 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:46:36,580 INFO L276 IsEmpty]: Start isEmpty. Operand 7829 states and 34107 transitions. [2022-01-18 15:46:36,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 15:46:36,594 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:46:36,594 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, 1, 1, 1, 1, 1] [2022-01-18 15:46:36,609 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (130)] Forceful destruction successful, exit code 0 [2022-01-18 15:46:36,794 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,SelfDestructingSolverStorable133 [2022-01-18 15:46:36,794 INFO L402 AbstractCegarLoop]: === Iteration 135 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-01-18 15:46:36,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:46:36,795 INFO L85 PathProgramCache]: Analyzing trace with hash 1128871626, now seen corresponding path program 1 times [2022-01-18 15:46:36,795 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:46:36,795 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1648181407] [2022-01-18 15:46:36,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:46:36,795 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:46:36,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:46:36,958 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 15:46:36,958 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:46:36,958 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1648181407] [2022-01-18 15:46:36,959 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1648181407] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:46:36,959 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2129336581] [2022-01-18 15:46:36,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:46:36,959 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:46:36,959 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:46:36,960 INFO L229 MonitoredProcess]: Starting monitored process 131 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:46:36,960 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (131)] Waiting until timeout for monitored process [2022-01-18 15:46:36,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:46:36,989 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2022-01-18 15:46:36,989 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:46:37,382 INFO L353 Elim1Store]: treesize reduction 48, result has 12.7 percent of original size [2022-01-18 15:46:37,383 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 6 new quantified variables, introduced 6 case distinctions, treesize of input 81 treesize of output 63 [2022-01-18 15:46:37,459 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 15:46:37,459 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:46:37,762 INFO L353 Elim1Store]: treesize reduction 36, result has 50.7 percent of original size [2022-01-18 15:46:37,762 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 27 treesize of output 48 [2022-01-18 15:46:37,820 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:46:37,821 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:46:37,821 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:46:37,822 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:46:37,822 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 27 treesize of output 7 [2022-01-18 15:46:37,865 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 15:46:37,866 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2129336581] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:46:37,866 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:46:37,866 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 32 [2022-01-18 15:46:37,866 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2058406032] [2022-01-18 15:46:37,866 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:46:37,866 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-01-18 15:46:37,866 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:46:37,866 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-01-18 15:46:37,866 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=971, Unknown=0, NotChecked=0, Total=1056 [2022-01-18 15:46:37,866 INFO L87 Difference]: Start difference. First operand 7829 states and 34107 transitions. Second operand has 33 states, 33 states have (on average 2.515151515151515) internal successors, (83), 32 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:46:39,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:46:39,790 INFO L93 Difference]: Finished difference Result 8629 states and 37111 transitions. [2022-01-18 15:46:39,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-01-18 15:46:39,791 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.515151515151515) internal successors, (83), 32 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 15:46:39,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:46:39,816 INFO L225 Difference]: With dead ends: 8629 [2022-01-18 15:46:39,816 INFO L226 Difference]: Without dead ends: 8616 [2022-01-18 15:46:39,816 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 43 SyntacticMatches, 4 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 439 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=243, Invalid=2619, Unknown=0, NotChecked=0, Total=2862 [2022-01-18 15:46:39,817 INFO L933 BasicCegarLoop]: 62 mSDtfsCounter, 475 mSDsluCounter, 2543 mSDsCounter, 0 mSdLazyCounter, 3137 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 475 SdHoareTripleChecker+Valid, 1064 SdHoareTripleChecker+Invalid, 3194 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 3137 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 24 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:46:39,817 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [475 Valid, 1064 Invalid, 3194 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 3137 Invalid, 0 Unknown, 24 Unchecked, 1.2s Time] [2022-01-18 15:46:39,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8616 states. [2022-01-18 15:46:39,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8616 to 7857. [2022-01-18 15:46:39,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7857 states, 7856 states have (on average 4.355269857433808) internal successors, (34215), 7856 states have internal predecessors, (34215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:46:39,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7857 states to 7857 states and 34215 transitions. [2022-01-18 15:46:39,963 INFO L78 Accepts]: Start accepts. Automaton has 7857 states and 34215 transitions. Word has length 33 [2022-01-18 15:46:39,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:46:39,963 INFO L470 AbstractCegarLoop]: Abstraction has 7857 states and 34215 transitions. [2022-01-18 15:46:39,963 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.515151515151515) internal successors, (83), 32 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:46:39,963 INFO L276 IsEmpty]: Start isEmpty. Operand 7857 states and 34215 transitions. [2022-01-18 15:46:39,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 15:46:39,979 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:46:39,979 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, 1, 1, 1, 1, 1] [2022-01-18 15:46:39,994 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 15:46:40,179 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 131 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable134 [2022-01-18 15:46:40,179 INFO L402 AbstractCegarLoop]: === Iteration 136 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-01-18 15:46:40,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:46:40,179 INFO L85 PathProgramCache]: Analyzing trace with hash 1984178280, now seen corresponding path program 1 times [2022-01-18 15:46:40,179 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:46:40,179 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1658559798] [2022-01-18 15:46:40,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:46:40,180 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:46:40,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:46:40,352 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 15:46:40,352 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:46:40,352 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1658559798] [2022-01-18 15:46:40,352 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1658559798] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:46:40,352 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1781146715] [2022-01-18 15:46:40,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:46:40,352 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:46:40,352 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:46:40,353 INFO L229 MonitoredProcess]: Starting monitored process 132 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:46:40,353 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (132)] Waiting until timeout for monitored process [2022-01-18 15:46:40,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:46:40,384 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2022-01-18 15:46:40,384 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:46:40,829 INFO L353 Elim1Store]: treesize reduction 48, result has 12.7 percent of original size [2022-01-18 15:46:40,830 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 6 new quantified variables, introduced 6 case distinctions, treesize of input 81 treesize of output 63 [2022-01-18 15:46:40,909 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 15:46:40,909 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:46:41,230 INFO L353 Elim1Store]: treesize reduction 36, result has 50.7 percent of original size [2022-01-18 15:46:41,231 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 27 treesize of output 48 [2022-01-18 15:46:41,301 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:46:41,302 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:46:41,302 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:46:41,303 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:46:41,303 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 27 treesize of output 7 [2022-01-18 15:46:41,352 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 15:46:41,352 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1781146715] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:46:41,352 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:46:41,352 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 32 [2022-01-18 15:46:41,352 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [681520297] [2022-01-18 15:46:41,352 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:46:41,352 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-01-18 15:46:41,353 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:46:41,353 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-01-18 15:46:41,353 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=971, Unknown=0, NotChecked=0, Total=1056 [2022-01-18 15:46:41,353 INFO L87 Difference]: Start difference. First operand 7857 states and 34215 transitions. Second operand has 33 states, 33 states have (on average 2.515151515151515) internal successors, (83), 32 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:46:43,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:46:43,427 INFO L93 Difference]: Finished difference Result 8645 states and 37144 transitions. [2022-01-18 15:46:43,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-01-18 15:46:43,428 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.515151515151515) internal successors, (83), 32 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 15:46:43,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:46:43,449 INFO L225 Difference]: With dead ends: 8645 [2022-01-18 15:46:43,449 INFO L226 Difference]: Without dead ends: 8632 [2022-01-18 15:46:43,449 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 43 SyntacticMatches, 4 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 439 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=243, Invalid=2619, Unknown=0, NotChecked=0, Total=2862 [2022-01-18 15:46:43,450 INFO L933 BasicCegarLoop]: 62 mSDtfsCounter, 407 mSDsluCounter, 2942 mSDsCounter, 0 mSdLazyCounter, 3538 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 407 SdHoareTripleChecker+Valid, 1234 SdHoareTripleChecker+Invalid, 3655 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 3538 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 87 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-01-18 15:46:43,450 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [407 Valid, 1234 Invalid, 3655 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 3538 Invalid, 0 Unknown, 87 Unchecked, 1.4s Time] [2022-01-18 15:46:43,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8632 states. [2022-01-18 15:46:43,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8632 to 7849. [2022-01-18 15:46:43,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7849 states, 7848 states have (on average 4.356651376146789) internal successors, (34191), 7848 states have internal predecessors, (34191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:46:43,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7849 states to 7849 states and 34191 transitions. [2022-01-18 15:46:43,601 INFO L78 Accepts]: Start accepts. Automaton has 7849 states and 34191 transitions. Word has length 33 [2022-01-18 15:46:43,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:46:43,601 INFO L470 AbstractCegarLoop]: Abstraction has 7849 states and 34191 transitions. [2022-01-18 15:46:43,601 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.515151515151515) internal successors, (83), 32 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:46:43,601 INFO L276 IsEmpty]: Start isEmpty. Operand 7849 states and 34191 transitions. [2022-01-18 15:46:43,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 15:46:43,616 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:46:43,616 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, 1, 1, 1, 1, 1] [2022-01-18 15:46:43,631 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (132)] Forceful destruction successful, exit code 0 [2022-01-18 15:46:43,816 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 132 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable135 [2022-01-18 15:46:43,816 INFO L402 AbstractCegarLoop]: === Iteration 137 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-01-18 15:46:43,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:46:43,816 INFO L85 PathProgramCache]: Analyzing trace with hash -1423285335, now seen corresponding path program 1 times [2022-01-18 15:46:43,817 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:46:43,817 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1456120084] [2022-01-18 15:46:43,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:46:43,817 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:46:43,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:46:43,980 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 15:46:43,981 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:46:43,981 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1456120084] [2022-01-18 15:46:43,981 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1456120084] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:46:43,981 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1252041818] [2022-01-18 15:46:43,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:46:43,981 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:46:43,981 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:46:43,982 INFO L229 MonitoredProcess]: Starting monitored process 133 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:46:43,982 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (133)] Waiting until timeout for monitored process [2022-01-18 15:46:44,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:46:44,013 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2022-01-18 15:46:44,013 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:46:44,402 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:46:44,403 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 37 treesize of output 21 [2022-01-18 15:46:44,479 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 15:46:44,479 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:46:44,784 INFO L353 Elim1Store]: treesize reduction 36, result has 50.7 percent of original size [2022-01-18 15:46:44,785 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 27 treesize of output 48 [2022-01-18 15:46:44,870 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:46:44,871 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:46:44,871 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:46:44,872 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:46:44,872 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 27 treesize of output 7 [2022-01-18 15:46:44,922 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 15:46:44,922 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1252041818] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:46:44,922 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:46:44,923 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 32 [2022-01-18 15:46:44,923 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1216807520] [2022-01-18 15:46:44,923 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:46:44,923 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-01-18 15:46:44,923 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:46:44,923 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-01-18 15:46:44,923 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=971, Unknown=0, NotChecked=0, Total=1056 [2022-01-18 15:46:44,923 INFO L87 Difference]: Start difference. First operand 7849 states and 34191 transitions. Second operand has 33 states, 33 states have (on average 2.515151515151515) internal successors, (83), 32 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:46:47,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:46:47,409 INFO L93 Difference]: Finished difference Result 8653 states and 37168 transitions. [2022-01-18 15:46:47,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-01-18 15:46:47,409 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.515151515151515) internal successors, (83), 32 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 15:46:47,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:46:47,433 INFO L225 Difference]: With dead ends: 8653 [2022-01-18 15:46:47,433 INFO L226 Difference]: Without dead ends: 8611 [2022-01-18 15:46:47,434 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 43 SyntacticMatches, 4 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 492 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=255, Invalid=2825, Unknown=0, NotChecked=0, Total=3080 [2022-01-18 15:46:47,434 INFO L933 BasicCegarLoop]: 62 mSDtfsCounter, 435 mSDsluCounter, 3318 mSDsCounter, 0 mSdLazyCounter, 4272 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 435 SdHoareTripleChecker+Valid, 1325 SdHoareTripleChecker+Invalid, 4303 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 4272 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-01-18 15:46:47,434 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [435 Valid, 1325 Invalid, 4303 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 4272 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-01-18 15:46:47,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8611 states. [2022-01-18 15:46:47,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8611 to 7789. [2022-01-18 15:46:47,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7789 states, 7788 states have (on average 4.363764766307139) internal successors, (33985), 7788 states have internal predecessors, (33985), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:46:47,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7789 states to 7789 states and 33985 transitions. [2022-01-18 15:46:47,601 INFO L78 Accepts]: Start accepts. Automaton has 7789 states and 33985 transitions. Word has length 33 [2022-01-18 15:46:47,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:46:47,601 INFO L470 AbstractCegarLoop]: Abstraction has 7789 states and 33985 transitions. [2022-01-18 15:46:47,601 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.515151515151515) internal successors, (83), 32 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:46:47,601 INFO L276 IsEmpty]: Start isEmpty. Operand 7789 states and 33985 transitions. [2022-01-18 15:46:47,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 15:46:47,618 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:46:47,618 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, 1, 1, 1, 1, 1] [2022-01-18 15:46:47,639 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (133)] Ended with exit code 0 [2022-01-18 15:46:47,818 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,SelfDestructingSolverStorable136 [2022-01-18 15:46:47,818 INFO L402 AbstractCegarLoop]: === Iteration 138 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-01-18 15:46:47,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:46:47,819 INFO L85 PathProgramCache]: Analyzing trace with hash -1341675749, now seen corresponding path program 42 times [2022-01-18 15:46:47,819 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:46:47,819 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [302962203] [2022-01-18 15:46:47,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:46:47,819 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:46:47,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:46:48,013 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 15:46:48,013 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:46:48,013 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [302962203] [2022-01-18 15:46:48,013 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [302962203] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:46:48,013 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [177072887] [2022-01-18 15:46:48,013 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 15:46:48,014 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:46:48,014 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:46:48,014 INFO L229 MonitoredProcess]: Starting monitored process 134 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:46:48,015 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (134)] Waiting until timeout for monitored process [2022-01-18 15:46:48,049 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 15:46:48,049 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:46:48,050 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2022-01-18 15:46:48,051 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:46:48,421 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:46:48,444 INFO L353 Elim1Store]: treesize reduction 12, result has 76.5 percent of original size [2022-01-18 15:46:48,444 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 29 treesize of output 55 [2022-01-18 15:46:48,652 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 15:46:48,653 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:46:49,101 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 15:46:49,101 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [177072887] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:46:49,101 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:46:49,101 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 34 [2022-01-18 15:46:49,101 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [738696607] [2022-01-18 15:46:49,101 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:46:49,101 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-01-18 15:46:49,101 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:46:49,101 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-01-18 15:46:49,102 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=1086, Unknown=0, NotChecked=0, Total=1190 [2022-01-18 15:46:49,102 INFO L87 Difference]: Start difference. First operand 7789 states and 33985 transitions. Second operand has 35 states, 35 states have (on average 2.342857142857143) internal successors, (82), 34 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:46:53,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:46:53,147 INFO L93 Difference]: Finished difference Result 9429 states and 39923 transitions. [2022-01-18 15:46:53,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2022-01-18 15:46:53,147 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.342857142857143) internal successors, (82), 34 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 15:46:53,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:46:53,171 INFO L225 Difference]: With dead ends: 9429 [2022-01-18 15:46:53,171 INFO L226 Difference]: Without dead ends: 9391 [2022-01-18 15:46:53,172 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 42 SyntacticMatches, 3 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1494 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=630, Invalid=6510, Unknown=0, NotChecked=0, Total=7140 [2022-01-18 15:46:53,172 INFO L933 BasicCegarLoop]: 63 mSDtfsCounter, 1010 mSDsluCounter, 3430 mSDsCounter, 0 mSdLazyCounter, 4241 mSolverCounterSat, 165 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1010 SdHoareTripleChecker+Valid, 1371 SdHoareTripleChecker+Invalid, 4406 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 165 IncrementalHoareTripleChecker+Valid, 4241 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-01-18 15:46:53,172 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1010 Valid, 1371 Invalid, 4406 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [165 Valid, 4241 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-01-18 15:46:53,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9391 states. [2022-01-18 15:46:53,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9391 to 7804. [2022-01-18 15:46:53,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7804 states, 7803 states have (on average 4.362040240932974) internal successors, (34037), 7803 states have internal predecessors, (34037), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:46:53,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7804 states to 7804 states and 34037 transitions. [2022-01-18 15:46:53,393 INFO L78 Accepts]: Start accepts. Automaton has 7804 states and 34037 transitions. Word has length 33 [2022-01-18 15:46:53,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:46:53,394 INFO L470 AbstractCegarLoop]: Abstraction has 7804 states and 34037 transitions. [2022-01-18 15:46:53,394 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.342857142857143) internal successors, (82), 34 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:46:53,394 INFO L276 IsEmpty]: Start isEmpty. Operand 7804 states and 34037 transitions. [2022-01-18 15:46:53,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 15:46:53,408 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:46:53,408 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, 1, 1, 1, 1, 1] [2022-01-18 15:46:53,424 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (134)] Ended with exit code 0 [2022-01-18 15:46:53,609 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable137,134 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:46:53,609 INFO L402 AbstractCegarLoop]: === Iteration 139 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-01-18 15:46:53,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:46:53,609 INFO L85 PathProgramCache]: Analyzing trace with hash -1905273173, now seen corresponding path program 43 times [2022-01-18 15:46:53,609 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:46:53,609 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1654839071] [2022-01-18 15:46:53,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:46:53,610 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:46:53,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:46:53,778 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 15:46:53,778 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:46:53,778 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1654839071] [2022-01-18 15:46:53,778 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1654839071] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:46:53,778 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [235608485] [2022-01-18 15:46:53,778 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 15:46:53,778 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:46:53,778 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:46:53,779 INFO L229 MonitoredProcess]: Starting monitored process 135 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:46:53,780 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (135)] Waiting until timeout for monitored process [2022-01-18 15:46:53,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:46:53,809 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2022-01-18 15:46:53,809 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:46:54,138 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:46:54,139 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 37 treesize of output 21 [2022-01-18 15:46:54,249 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 15:46:54,249 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:46:54,551 INFO L353 Elim1Store]: treesize reduction 36, result has 50.7 percent of original size [2022-01-18 15:46:54,551 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 27 treesize of output 48 [2022-01-18 15:46:54,614 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:46:54,614 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:46:54,615 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:46:54,615 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:46:54,616 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 7 [2022-01-18 15:46:54,659 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 15:46:54,659 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [235608485] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:46:54,659 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:46:54,660 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 32 [2022-01-18 15:46:54,660 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1250205437] [2022-01-18 15:46:54,660 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:46:54,660 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-01-18 15:46:54,660 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:46:54,660 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-01-18 15:46:54,660 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=959, Unknown=0, NotChecked=0, Total=1056 [2022-01-18 15:46:54,660 INFO L87 Difference]: Start difference. First operand 7804 states and 34037 transitions. Second operand has 33 states, 33 states have (on average 2.515151515151515) internal successors, (83), 32 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:46:57,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:46:57,430 INFO L93 Difference]: Finished difference Result 10276 states and 43727 transitions. [2022-01-18 15:46:57,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2022-01-18 15:46:57,430 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.515151515151515) internal successors, (83), 32 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 15:46:57,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:46:57,463 INFO L225 Difference]: With dead ends: 10276 [2022-01-18 15:46:57,463 INFO L226 Difference]: Without dead ends: 10227 [2022-01-18 15:46:57,464 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 45 SyntacticMatches, 4 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1185 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=418, Invalid=4694, Unknown=0, NotChecked=0, Total=5112 [2022-01-18 15:46:57,464 INFO L933 BasicCegarLoop]: 68 mSDtfsCounter, 811 mSDsluCounter, 3595 mSDsCounter, 0 mSdLazyCounter, 4202 mSolverCounterSat, 85 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 811 SdHoareTripleChecker+Valid, 1362 SdHoareTripleChecker+Invalid, 4759 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 85 IncrementalHoareTripleChecker+Valid, 4202 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 472 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-01-18 15:46:57,464 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [811 Valid, 1362 Invalid, 4759 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [85 Valid, 4202 Invalid, 0 Unknown, 472 Unchecked, 1.6s Time] [2022-01-18 15:46:57,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10227 states. [2022-01-18 15:46:57,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10227 to 7888. [2022-01-18 15:46:57,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7888 states, 7887 states have (on average 4.363129199949284) internal successors, (34412), 7887 states have internal predecessors, (34412), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:46:57,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7888 states to 7888 states and 34412 transitions. [2022-01-18 15:46:57,669 INFO L78 Accepts]: Start accepts. Automaton has 7888 states and 34412 transitions. Word has length 33 [2022-01-18 15:46:57,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:46:57,669 INFO L470 AbstractCegarLoop]: Abstraction has 7888 states and 34412 transitions. [2022-01-18 15:46:57,669 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.515151515151515) internal successors, (83), 32 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:46:57,670 INFO L276 IsEmpty]: Start isEmpty. Operand 7888 states and 34412 transitions. [2022-01-18 15:46:57,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 15:46:57,684 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:46:57,684 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, 1, 1, 1, 1, 1] [2022-01-18 15:46:57,699 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (135)] Ended with exit code 0 [2022-01-18 15:46:57,885 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,SelfDestructingSolverStorable138 [2022-01-18 15:46:57,885 INFO L402 AbstractCegarLoop]: === Iteration 140 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-01-18 15:46:57,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:46:57,885 INFO L85 PathProgramCache]: Analyzing trace with hash 2018469117, now seen corresponding path program 44 times [2022-01-18 15:46:57,885 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:46:57,885 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1888531875] [2022-01-18 15:46:57,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:46:57,886 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:46:57,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:46:58,072 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 15:46:58,073 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:46:58,073 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1888531875] [2022-01-18 15:46:58,073 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1888531875] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:46:58,073 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1024855219] [2022-01-18 15:46:58,073 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 15:46:58,073 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:46:58,073 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:46:58,074 INFO L229 MonitoredProcess]: Starting monitored process 136 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:46:58,075 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (136)] Waiting until timeout for monitored process [2022-01-18 15:46:58,106 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:46:58,106 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:46:58,107 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2022-01-18 15:46:58,107 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:46:58,447 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:46:58,447 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 3 new quantified variables, introduced 3 case distinctions, treesize of input 29 treesize of output 45 [2022-01-18 15:46:58,822 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 15:46:58,822 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:46:58,994 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:46:58,994 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 22 [2022-01-18 15:46:59,003 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:46:59,003 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 7 [2022-01-18 15:46:59,048 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 15:46:59,048 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1024855219] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:46:59,048 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:46:59,048 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 29 [2022-01-18 15:46:59,048 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [734458050] [2022-01-18 15:46:59,048 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:46:59,049 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-01-18 15:46:59,049 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:46:59,049 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-01-18 15:46:59,049 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=780, Unknown=0, NotChecked=0, Total=870 [2022-01-18 15:46:59,049 INFO L87 Difference]: Start difference. First operand 7888 states and 34412 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 15:47:00,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:47:00,280 INFO L93 Difference]: Finished difference Result 8300 states and 35943 transitions. [2022-01-18 15:47:00,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-01-18 15:47:00,280 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 33 [2022-01-18 15:47:00,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:47:00,303 INFO L225 Difference]: With dead ends: 8300 [2022-01-18 15:47:00,303 INFO L226 Difference]: Without dead ends: 8289 [2022-01-18 15:47:00,303 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 47 SyntacticMatches, 6 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 408 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=203, Invalid=1603, Unknown=0, NotChecked=0, Total=1806 [2022-01-18 15:47:00,303 INFO L933 BasicCegarLoop]: 44 mSDtfsCounter, 343 mSDsluCounter, 1705 mSDsCounter, 0 mSdLazyCounter, 2173 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 343 SdHoareTripleChecker+Valid, 678 SdHoareTripleChecker+Invalid, 2266 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 2173 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 54 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-18 15:47:00,303 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [343 Valid, 678 Invalid, 2266 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 2173 Invalid, 0 Unknown, 54 Unchecked, 0.8s Time] [2022-01-18 15:47:00,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8289 states. [2022-01-18 15:47:00,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8289 to 7894. [2022-01-18 15:47:00,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7894 states, 7893 states have (on average 4.362219688331433) internal successors, (34431), 7893 states have internal predecessors, (34431), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:47:00,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7894 states to 7894 states and 34431 transitions. [2022-01-18 15:47:00,535 INFO L78 Accepts]: Start accepts. Automaton has 7894 states and 34431 transitions. Word has length 33 [2022-01-18 15:47:00,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:47:00,535 INFO L470 AbstractCegarLoop]: Abstraction has 7894 states and 34431 transitions. [2022-01-18 15:47:00,535 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 15:47:00,535 INFO L276 IsEmpty]: Start isEmpty. Operand 7894 states and 34431 transitions. [2022-01-18 15:47:00,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 15:47:00,551 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:47:00,551 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, 1, 1, 1, 1, 1] [2022-01-18 15:47:00,566 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (136)] Ended with exit code 0 [2022-01-18 15:47:00,752 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable139,136 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:47:00,752 INFO L402 AbstractCegarLoop]: === Iteration 141 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-01-18 15:47:00,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:47:00,753 INFO L85 PathProgramCache]: Analyzing trace with hash 1821955612, now seen corresponding path program 2 times [2022-01-18 15:47:00,753 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:47:00,753 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1721921764] [2022-01-18 15:47:00,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:47:00,753 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:47:00,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:47:00,923 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 15:47:00,923 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:47:00,923 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1721921764] [2022-01-18 15:47:00,924 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1721921764] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:47:00,924 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1692904533] [2022-01-18 15:47:00,924 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 15:47:00,924 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:47:00,924 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:47:00,925 INFO L229 MonitoredProcess]: Starting monitored process 137 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:47:00,925 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (137)] Waiting until timeout for monitored process [2022-01-18 15:47:00,956 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:47:00,957 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:47:00,957 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2022-01-18 15:47:00,958 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:47:01,308 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:47:01,308 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 3 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 49 [2022-01-18 15:47:01,652 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 15:47:01,652 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:47:01,841 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:47:01,841 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 22 [2022-01-18 15:47:01,850 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:47:01,850 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 7 [2022-01-18 15:47:01,895 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 15:47:01,895 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1692904533] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:47:01,895 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:47:01,895 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 29 [2022-01-18 15:47:01,895 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1036472411] [2022-01-18 15:47:01,895 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:47:01,896 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-01-18 15:47:01,896 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:47:01,896 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-01-18 15:47:01,896 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=780, Unknown=0, NotChecked=0, Total=870 [2022-01-18 15:47:01,896 INFO L87 Difference]: Start difference. First operand 7894 states and 34431 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 15:47:03,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:47:03,389 INFO L93 Difference]: Finished difference Result 8300 states and 35942 transitions. [2022-01-18 15:47:03,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-01-18 15:47:03,389 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 33 [2022-01-18 15:47:03,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:47:03,411 INFO L225 Difference]: With dead ends: 8300 [2022-01-18 15:47:03,411 INFO L226 Difference]: Without dead ends: 8287 [2022-01-18 15:47:03,411 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 47 SyntacticMatches, 6 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 416 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=202, Invalid=1604, Unknown=0, NotChecked=0, Total=1806 [2022-01-18 15:47:03,412 INFO L933 BasicCegarLoop]: 44 mSDtfsCounter, 272 mSDsluCounter, 2328 mSDsCounter, 0 mSdLazyCounter, 2787 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 272 SdHoareTripleChecker+Valid, 892 SdHoareTripleChecker+Invalid, 3096 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 2787 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 279 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-01-18 15:47:03,412 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [272 Valid, 892 Invalid, 3096 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 2787 Invalid, 0 Unknown, 279 Unchecked, 1.0s Time] [2022-01-18 15:47:03,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8287 states. [2022-01-18 15:47:03,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8287 to 7881. [2022-01-18 15:47:03,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7881 states, 7880 states have (on average 4.364213197969543) internal successors, (34390), 7880 states have internal predecessors, (34390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:47:03,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7881 states to 7881 states and 34390 transitions. [2022-01-18 15:47:03,658 INFO L78 Accepts]: Start accepts. Automaton has 7881 states and 34390 transitions. Word has length 33 [2022-01-18 15:47:03,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:47:03,658 INFO L470 AbstractCegarLoop]: Abstraction has 7881 states and 34390 transitions. [2022-01-18 15:47:03,658 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 15:47:03,659 INFO L276 IsEmpty]: Start isEmpty. Operand 7881 states and 34390 transitions. [2022-01-18 15:47:03,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 15:47:03,675 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:47:03,675 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, 1, 1, 1, 1, 1] [2022-01-18 15:47:03,690 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (137)] Ended with exit code 0 [2022-01-18 15:47:03,875 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140,137 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:47:03,875 INFO L402 AbstractCegarLoop]: === Iteration 142 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-01-18 15:47:03,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:47:03,876 INFO L85 PathProgramCache]: Analyzing trace with hash -300920175, now seen corresponding path program 45 times [2022-01-18 15:47:03,876 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:47:03,876 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2031295382] [2022-01-18 15:47:03,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:47:03,876 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:47:03,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:47:04,076 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 15:47:04,076 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:47:04,076 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2031295382] [2022-01-18 15:47:04,076 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2031295382] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:47:04,076 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [967578497] [2022-01-18 15:47:04,077 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 15:47:04,077 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:47:04,077 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:47:04,077 INFO L229 MonitoredProcess]: Starting monitored process 138 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:47:04,078 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (138)] Waiting until timeout for monitored process [2022-01-18 15:47:04,108 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 15:47:04,108 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:47:04,108 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 43 conjunts are in the unsatisfiable core [2022-01-18 15:47:04,109 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:47:04,450 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:47:04,469 INFO L353 Elim1Store]: treesize reduction 12, result has 76.5 percent of original size [2022-01-18 15:47:04,470 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 29 treesize of output 55 [2022-01-18 15:47:04,672 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 15:47:04,672 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:47:05,051 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 15:47:05,052 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [967578497] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:47:05,052 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:47:05,052 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 34 [2022-01-18 15:47:05,052 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1190240415] [2022-01-18 15:47:05,052 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:47:05,052 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-01-18 15:47:05,052 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:47:05,052 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-01-18 15:47:05,052 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=1085, Unknown=0, NotChecked=0, Total=1190 [2022-01-18 15:47:05,052 INFO L87 Difference]: Start difference. First operand 7881 states and 34390 transitions. Second operand has 35 states, 35 states have (on average 2.342857142857143) internal successors, (82), 34 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:47:09,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:47:09,834 INFO L93 Difference]: Finished difference Result 10866 states and 45556 transitions. [2022-01-18 15:47:09,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2022-01-18 15:47:09,834 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.342857142857143) internal successors, (82), 34 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 15:47:09,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:47:09,863 INFO L225 Difference]: With dead ends: 10866 [2022-01-18 15:47:09,863 INFO L226 Difference]: Without dead ends: 10828 [2022-01-18 15:47:09,864 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 42 SyntacticMatches, 3 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2099 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=753, Invalid=8177, Unknown=0, NotChecked=0, Total=8930 [2022-01-18 15:47:09,864 INFO L933 BasicCegarLoop]: 76 mSDtfsCounter, 1115 mSDsluCounter, 4261 mSDsCounter, 0 mSdLazyCounter, 5170 mSolverCounterSat, 186 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1115 SdHoareTripleChecker+Valid, 1682 SdHoareTripleChecker+Invalid, 5356 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 186 IncrementalHoareTripleChecker+Valid, 5170 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:47:09,864 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1115 Valid, 1682 Invalid, 5356 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [186 Valid, 5170 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2022-01-18 15:47:09,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10828 states. [2022-01-18 15:47:10,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10828 to 7959. [2022-01-18 15:47:10,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7959 states, 7958 states have (on average 4.369188238250817) internal successors, (34770), 7958 states have internal predecessors, (34770), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:47:10,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7959 states to 7959 states and 34770 transitions. [2022-01-18 15:47:10,054 INFO L78 Accepts]: Start accepts. Automaton has 7959 states and 34770 transitions. Word has length 33 [2022-01-18 15:47:10,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:47:10,054 INFO L470 AbstractCegarLoop]: Abstraction has 7959 states and 34770 transitions. [2022-01-18 15:47:10,054 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.342857142857143) internal successors, (82), 34 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:47:10,054 INFO L276 IsEmpty]: Start isEmpty. Operand 7959 states and 34770 transitions. [2022-01-18 15:47:10,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 15:47:10,070 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:47:10,070 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, 1, 1, 1, 1, 1] [2022-01-18 15:47:10,085 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (138)] Ended with exit code 0 [2022-01-18 15:47:10,270 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141,138 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:47:10,270 INFO L402 AbstractCegarLoop]: === Iteration 143 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-01-18 15:47:10,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:47:10,271 INFO L85 PathProgramCache]: Analyzing trace with hash -1235742605, now seen corresponding path program 46 times [2022-01-18 15:47:10,271 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:47:10,271 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1930297907] [2022-01-18 15:47:10,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:47:10,271 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:47:10,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:47:10,435 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 15:47:10,435 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:47:10,436 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1930297907] [2022-01-18 15:47:10,436 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1930297907] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:47:10,436 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2098197429] [2022-01-18 15:47:10,436 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 15:47:10,436 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:47:10,436 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:47:10,437 INFO L229 MonitoredProcess]: Starting monitored process 139 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:47:10,437 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (139)] Waiting until timeout for monitored process [2022-01-18 15:47:10,466 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 15:47:10,466 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:47:10,467 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2022-01-18 15:47:10,468 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:47:10,818 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:47:10,819 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 37 treesize of output 21 [2022-01-18 15:47:10,930 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 15:47:10,930 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:47:11,207 INFO L353 Elim1Store]: treesize reduction 36, result has 50.7 percent of original size [2022-01-18 15:47:11,208 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 27 treesize of output 48 [2022-01-18 15:47:11,266 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:47:11,267 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:47:11,267 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:47:11,268 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:47:11,268 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 27 treesize of output 7 [2022-01-18 15:47:11,312 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 15:47:11,313 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2098197429] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:47:11,313 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:47:11,313 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 31 [2022-01-18 15:47:11,313 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [775988883] [2022-01-18 15:47:11,313 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:47:11,313 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-01-18 15:47:11,313 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:47:11,313 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-01-18 15:47:11,313 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=899, Unknown=0, NotChecked=0, Total=992 [2022-01-18 15:47:11,313 INFO L87 Difference]: Start difference. First operand 7959 states and 34770 transitions. Second operand has 32 states, 32 states have (on average 2.46875) internal successors, (79), 31 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:47:13,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:47:13,382 INFO L93 Difference]: Finished difference Result 9194 states and 39385 transitions. [2022-01-18 15:47:13,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-01-18 15:47:13,382 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.46875) internal successors, (79), 31 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 15:47:13,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:47:13,406 INFO L225 Difference]: With dead ends: 9194 [2022-01-18 15:47:13,407 INFO L226 Difference]: Without dead ends: 9166 [2022-01-18 15:47:13,407 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 45 SyntacticMatches, 4 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 457 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=211, Invalid=2239, Unknown=0, NotChecked=0, Total=2450 [2022-01-18 15:47:13,407 INFO L933 BasicCegarLoop]: 66 mSDtfsCounter, 515 mSDsluCounter, 3073 mSDsCounter, 0 mSdLazyCounter, 4005 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 515 SdHoareTripleChecker+Valid, 1257 SdHoareTripleChecker+Invalid, 4130 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 4005 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 81 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-01-18 15:47:13,407 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [515 Valid, 1257 Invalid, 4130 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 4005 Invalid, 0 Unknown, 81 Unchecked, 1.5s Time] [2022-01-18 15:47:13,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9166 states. [2022-01-18 15:47:13,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9166 to 8022. [2022-01-18 15:47:13,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8022 states, 8021 states have (on average 4.364792419897769) internal successors, (35010), 8021 states have internal predecessors, (35010), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:47:13,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8022 states to 8022 states and 35010 transitions. [2022-01-18 15:47:13,581 INFO L78 Accepts]: Start accepts. Automaton has 8022 states and 35010 transitions. Word has length 33 [2022-01-18 15:47:13,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:47:13,581 INFO L470 AbstractCegarLoop]: Abstraction has 8022 states and 35010 transitions. [2022-01-18 15:47:13,582 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.46875) internal successors, (79), 31 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:47:13,582 INFO L276 IsEmpty]: Start isEmpty. Operand 8022 states and 35010 transitions. [2022-01-18 15:47:13,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 15:47:13,598 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:47:13,598 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, 1, 1, 1, 1, 1] [2022-01-18 15:47:13,619 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (139)] Ended with exit code 0 [2022-01-18 15:47:13,798 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142,139 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:47:13,798 INFO L402 AbstractCegarLoop]: === Iteration 144 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-01-18 15:47:13,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:47:13,798 INFO L85 PathProgramCache]: Analyzing trace with hash -1432256110, now seen corresponding path program 3 times [2022-01-18 15:47:13,799 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:47:13,799 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1120590718] [2022-01-18 15:47:13,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:47:13,799 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:47:13,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:47:13,968 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 15:47:13,969 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:47:13,969 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1120590718] [2022-01-18 15:47:13,969 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1120590718] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:47:13,969 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [755071163] [2022-01-18 15:47:13,969 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 15:47:13,969 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:47:13,969 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:47:13,970 INFO L229 MonitoredProcess]: Starting monitored process 140 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:47:13,970 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (140)] Waiting until timeout for monitored process [2022-01-18 15:47:13,999 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 15:47:13,999 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:47:14,000 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 43 conjunts are in the unsatisfiable core [2022-01-18 15:47:14,000 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:47:14,350 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:47:14,370 INFO L353 Elim1Store]: treesize reduction 14, result has 72.5 percent of original size [2022-01-18 15:47:14,370 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 33 treesize of output 57 [2022-01-18 15:47:14,531 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 15:47:14,531 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:47:14,881 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 15:47:14,881 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [755071163] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:47:14,882 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:47:14,882 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 13] total 33 [2022-01-18 15:47:14,882 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1515013015] [2022-01-18 15:47:14,882 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:47:14,882 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-01-18 15:47:14,882 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:47:14,882 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-01-18 15:47:14,882 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=1013, Unknown=0, NotChecked=0, Total=1122 [2022-01-18 15:47:14,882 INFO L87 Difference]: Start difference. First operand 8022 states and 35010 transitions. Second operand has 34 states, 34 states have (on average 2.3823529411764706) internal successors, (81), 33 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:47:18,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:47:18,773 INFO L93 Difference]: Finished difference Result 10657 states and 44581 transitions. [2022-01-18 15:47:18,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2022-01-18 15:47:18,773 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.3823529411764706) internal successors, (81), 33 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 15:47:18,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:47:18,801 INFO L225 Difference]: With dead ends: 10657 [2022-01-18 15:47:18,801 INFO L226 Difference]: Without dead ends: 10631 [2022-01-18 15:47:18,802 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 43 SyntacticMatches, 3 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1745 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=672, Invalid=6638, Unknown=0, NotChecked=0, Total=7310 [2022-01-18 15:47:18,802 INFO L933 BasicCegarLoop]: 68 mSDtfsCounter, 1118 mSDsluCounter, 3640 mSDsCounter, 0 mSdLazyCounter, 4572 mSolverCounterSat, 186 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1118 SdHoareTripleChecker+Valid, 1422 SdHoareTripleChecker+Invalid, 4758 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 186 IncrementalHoareTripleChecker+Valid, 4572 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-01-18 15:47:18,802 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1118 Valid, 1422 Invalid, 4758 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [186 Valid, 4572 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2022-01-18 15:47:18,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10631 states. [2022-01-18 15:47:18,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10631 to 7990. [2022-01-18 15:47:18,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7990 states, 7989 states have (on average 4.365127049693329) internal successors, (34873), 7989 states have internal predecessors, (34873), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:47:18,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7990 states to 7990 states and 34873 transitions. [2022-01-18 15:47:18,974 INFO L78 Accepts]: Start accepts. Automaton has 7990 states and 34873 transitions. Word has length 33 [2022-01-18 15:47:18,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:47:18,974 INFO L470 AbstractCegarLoop]: Abstraction has 7990 states and 34873 transitions. [2022-01-18 15:47:18,974 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 2.3823529411764706) internal successors, (81), 33 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:47:18,974 INFO L276 IsEmpty]: Start isEmpty. Operand 7990 states and 34873 transitions. [2022-01-18 15:47:18,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 15:47:18,989 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:47:18,989 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, 1, 1, 1, 1, 1] [2022-01-18 15:47:19,004 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (140)] Ended with exit code 0 [2022-01-18 15:47:19,189 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 140 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable143 [2022-01-18 15:47:19,189 INFO L402 AbstractCegarLoop]: === Iteration 145 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-01-18 15:47:19,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:47:19,189 INFO L85 PathProgramCache]: Analyzing trace with hash 1876450095, now seen corresponding path program 47 times [2022-01-18 15:47:19,189 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:47:19,189 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1823678651] [2022-01-18 15:47:19,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:47:19,190 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:47:19,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:47:19,371 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 15:47:19,371 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:47:19,371 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1823678651] [2022-01-18 15:47:19,371 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1823678651] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:47:19,371 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [443402929] [2022-01-18 15:47:19,372 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 15:47:19,372 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:47:19,372 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:47:19,372 INFO L229 MonitoredProcess]: Starting monitored process 141 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:47:19,373 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (141)] Waiting until timeout for monitored process [2022-01-18 15:47:19,403 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 15:47:19,404 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:47:19,404 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2022-01-18 15:47:19,405 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:47:19,763 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:47:19,763 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 21 [2022-01-18 15:47:19,868 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 15:47:19,868 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:47:20,176 INFO L353 Elim1Store]: treesize reduction 36, result has 50.7 percent of original size [2022-01-18 15:47:20,176 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 27 treesize of output 48 [2022-01-18 15:47:20,242 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:47:20,242 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:47:20,243 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:47:20,243 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:47:20,244 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 27 treesize of output 7 [2022-01-18 15:47:20,291 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 15:47:20,291 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [443402929] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:47:20,291 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:47:20,291 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 32 [2022-01-18 15:47:20,291 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [315748942] [2022-01-18 15:47:20,291 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:47:20,291 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-01-18 15:47:20,292 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:47:20,292 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-01-18 15:47:20,292 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=961, Unknown=0, NotChecked=0, Total=1056 [2022-01-18 15:47:20,292 INFO L87 Difference]: Start difference. First operand 7990 states and 34873 transitions. Second operand has 33 states, 33 states have (on average 2.515151515151515) internal successors, (83), 32 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:47:22,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:47:22,690 INFO L93 Difference]: Finished difference Result 9092 states and 39166 transitions. [2022-01-18 15:47:22,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-01-18 15:47:22,690 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.515151515151515) internal successors, (83), 32 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 15:47:22,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:47:22,714 INFO L225 Difference]: With dead ends: 9092 [2022-01-18 15:47:22,714 INFO L226 Difference]: Without dead ends: 9054 [2022-01-18 15:47:22,715 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 43 SyntacticMatches, 4 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 648 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=307, Invalid=2999, Unknown=0, NotChecked=0, Total=3306 [2022-01-18 15:47:22,715 INFO L933 BasicCegarLoop]: 62 mSDtfsCounter, 565 mSDsluCounter, 3104 mSDsCounter, 0 mSdLazyCounter, 4065 mSolverCounterSat, 77 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 565 SdHoareTripleChecker+Valid, 1223 SdHoareTripleChecker+Invalid, 4142 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 4065 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-01-18 15:47:22,715 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [565 Valid, 1223 Invalid, 4142 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [77 Valid, 4065 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-01-18 15:47:22,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9054 states. [2022-01-18 15:47:22,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9054 to 8053. [2022-01-18 15:47:22,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8053 states, 8052 states have (on average 4.3691008445106805) internal successors, (35180), 8052 states have internal predecessors, (35180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:47:22,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8053 states to 8053 states and 35180 transitions. [2022-01-18 15:47:22,869 INFO L78 Accepts]: Start accepts. Automaton has 8053 states and 35180 transitions. Word has length 33 [2022-01-18 15:47:22,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:47:22,869 INFO L470 AbstractCegarLoop]: Abstraction has 8053 states and 35180 transitions. [2022-01-18 15:47:22,869 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.515151515151515) internal successors, (83), 32 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:47:22,869 INFO L276 IsEmpty]: Start isEmpty. Operand 8053 states and 35180 transitions. [2022-01-18 15:47:22,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 15:47:22,884 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:47:22,884 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, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:47:22,899 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (141)] Ended with exit code 0 [2022-01-18 15:47:23,084 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 141 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable144 [2022-01-18 15:47:23,085 INFO L402 AbstractCegarLoop]: === Iteration 146 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-01-18 15:47:23,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:47:23,085 INFO L85 PathProgramCache]: Analyzing trace with hash 745114160, now seen corresponding path program 4 times [2022-01-18 15:47:23,085 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:47:23,085 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [45612342] [2022-01-18 15:47:23,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:47:23,085 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:47:23,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:47:23,261 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 15:47:23,261 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:47:23,261 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [45612342] [2022-01-18 15:47:23,261 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [45612342] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:47:23,261 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1151077597] [2022-01-18 15:47:23,261 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 15:47:23,261 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:47:23,261 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:47:23,262 INFO L229 MonitoredProcess]: Starting monitored process 142 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:47:23,262 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (142)] Waiting until timeout for monitored process [2022-01-18 15:47:23,291 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 15:47:23,291 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:47:23,292 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2022-01-18 15:47:23,292 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:47:23,691 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:47:23,691 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 21 [2022-01-18 15:47:23,824 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 15:47:23,824 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:47:24,086 INFO L353 Elim1Store]: treesize reduction 36, result has 50.7 percent of original size [2022-01-18 15:47:24,086 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 27 treesize of output 48 [2022-01-18 15:47:24,166 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:47:24,166 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:47:24,167 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:47:24,168 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:47:24,168 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 27 treesize of output 7 [2022-01-18 15:47:24,221 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 15:47:24,221 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1151077597] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:47:24,221 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:47:24,221 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 31 [2022-01-18 15:47:24,222 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2127999971] [2022-01-18 15:47:24,222 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:47:24,222 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-01-18 15:47:24,222 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:47:24,222 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-01-18 15:47:24,222 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=891, Unknown=0, NotChecked=0, Total=992 [2022-01-18 15:47:24,222 INFO L87 Difference]: Start difference. First operand 8053 states and 35180 transitions. Second operand has 32 states, 32 states have (on average 2.46875) internal successors, (79), 31 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:47:26,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:47:26,465 INFO L93 Difference]: Finished difference Result 9208 states and 39560 transitions. [2022-01-18 15:47:26,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-01-18 15:47:26,465 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.46875) internal successors, (79), 31 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 15:47:26,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:47:26,489 INFO L225 Difference]: With dead ends: 9208 [2022-01-18 15:47:26,489 INFO L226 Difference]: Without dead ends: 9160 [2022-01-18 15:47:26,489 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 44 SyntacticMatches, 4 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 633 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=277, Invalid=2693, Unknown=0, NotChecked=0, Total=2970 [2022-01-18 15:47:26,490 INFO L933 BasicCegarLoop]: 61 mSDtfsCounter, 616 mSDsluCounter, 3046 mSDsCounter, 0 mSdLazyCounter, 4076 mSolverCounterSat, 81 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 616 SdHoareTripleChecker+Valid, 1184 SdHoareTripleChecker+Invalid, 4157 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 81 IncrementalHoareTripleChecker+Valid, 4076 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-01-18 15:47:26,490 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [616 Valid, 1184 Invalid, 4157 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [81 Valid, 4076 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-01-18 15:47:26,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9160 states. [2022-01-18 15:47:26,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9160 to 7980. [2022-01-18 15:47:26,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7980 states, 7979 states have (on average 4.374232359944855) internal successors, (34902), 7979 states have internal predecessors, (34902), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:47:26,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7980 states to 7980 states and 34902 transitions. [2022-01-18 15:47:26,639 INFO L78 Accepts]: Start accepts. Automaton has 7980 states and 34902 transitions. Word has length 33 [2022-01-18 15:47:26,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:47:26,640 INFO L470 AbstractCegarLoop]: Abstraction has 7980 states and 34902 transitions. [2022-01-18 15:47:26,640 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.46875) internal successors, (79), 31 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:47:26,640 INFO L276 IsEmpty]: Start isEmpty. Operand 7980 states and 34902 transitions. [2022-01-18 15:47:26,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 15:47:26,654 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:47:26,654 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, 1, 1, 1, 1, 1] [2022-01-18 15:47:26,669 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (142)] Ended with exit code 0 [2022-01-18 15:47:26,854 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable145,142 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:47:26,854 INFO L402 AbstractCegarLoop]: === Iteration 147 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-01-18 15:47:26,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:47:26,855 INFO L85 PathProgramCache]: Analyzing trace with hash 1631151711, now seen corresponding path program 48 times [2022-01-18 15:47:26,855 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:47:26,855 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1553055955] [2022-01-18 15:47:26,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:47:26,855 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:47:26,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:47:27,065 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 15:47:27,066 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:47:27,066 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1553055955] [2022-01-18 15:47:27,066 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1553055955] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:47:27,066 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [567684466] [2022-01-18 15:47:27,066 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 15:47:27,066 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:47:27,066 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:47:27,067 INFO L229 MonitoredProcess]: Starting monitored process 143 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:47:27,068 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (143)] Waiting until timeout for monitored process [2022-01-18 15:47:27,100 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-01-18 15:47:27,100 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:47:27,101 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 43 conjunts are in the unsatisfiable core [2022-01-18 15:47:27,101 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:47:27,390 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:47:27,409 INFO L353 Elim1Store]: treesize reduction 14, result has 72.5 percent of original size [2022-01-18 15:47:27,410 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 31 treesize of output 55 [2022-01-18 15:47:27,682 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 15:47:27,682 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:47:28,008 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 15:47:28,008 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [567684466] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:47:28,008 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:47:28,008 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 33 [2022-01-18 15:47:28,008 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1723819983] [2022-01-18 15:47:28,009 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:47:28,009 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-01-18 15:47:28,009 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:47:28,009 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-01-18 15:47:28,009 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=1003, Unknown=0, NotChecked=0, Total=1122 [2022-01-18 15:47:28,009 INFO L87 Difference]: Start difference. First operand 7980 states and 34902 transitions. Second operand has 34 states, 34 states have (on average 2.323529411764706) internal successors, (79), 33 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:47:33,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:47:33,214 INFO L93 Difference]: Finished difference Result 11257 states and 48216 transitions. [2022-01-18 15:47:33,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2022-01-18 15:47:33,214 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.323529411764706) internal successors, (79), 33 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 15:47:33,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:47:33,287 INFO L225 Difference]: With dead ends: 11257 [2022-01-18 15:47:33,287 INFO L226 Difference]: Without dead ends: 11187 [2022-01-18 15:47:33,288 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 43 SyntacticMatches, 3 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2920 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=1015, Invalid=9085, Unknown=0, NotChecked=0, Total=10100 [2022-01-18 15:47:33,288 INFO L933 BasicCegarLoop]: 77 mSDtfsCounter, 1185 mSDsluCounter, 4530 mSDsCounter, 0 mSdLazyCounter, 6253 mSolverCounterSat, 240 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1185 SdHoareTripleChecker+Valid, 1800 SdHoareTripleChecker+Invalid, 6493 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 240 IncrementalHoareTripleChecker+Valid, 6253 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2022-01-18 15:47:33,288 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1185 Valid, 1800 Invalid, 6493 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [240 Valid, 6253 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2022-01-18 15:47:33,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11187 states. [2022-01-18 15:47:33,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11187 to 8331. [2022-01-18 15:47:33,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8331 states, 8330 states have (on average 4.3984393757503) internal successors, (36639), 8330 states have internal predecessors, (36639), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:47:33,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8331 states to 8331 states and 36639 transitions. [2022-01-18 15:47:33,452 INFO L78 Accepts]: Start accepts. Automaton has 8331 states and 36639 transitions. Word has length 33 [2022-01-18 15:47:33,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:47:33,452 INFO L470 AbstractCegarLoop]: Abstraction has 8331 states and 36639 transitions. [2022-01-18 15:47:33,452 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 2.323529411764706) internal successors, (79), 33 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:47:33,452 INFO L276 IsEmpty]: Start isEmpty. Operand 8331 states and 36639 transitions. [2022-01-18 15:47:33,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 15:47:33,468 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:47:33,468 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, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:47:33,483 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (143)] Ended with exit code 0 [2022-01-18 15:47:33,668 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,SelfDestructingSolverStorable146 [2022-01-18 15:47:33,669 INFO L402 AbstractCegarLoop]: === Iteration 148 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-01-18 15:47:33,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:47:33,669 INFO L85 PathProgramCache]: Analyzing trace with hash -1360542979, now seen corresponding path program 49 times [2022-01-18 15:47:33,669 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:47:33,669 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1370017179] [2022-01-18 15:47:33,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:47:33,670 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:47:33,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:47:33,838 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 15:47:33,839 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:47:33,839 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1370017179] [2022-01-18 15:47:33,839 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1370017179] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:47:33,839 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [909406433] [2022-01-18 15:47:33,839 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 15:47:33,839 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:47:33,839 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:47:33,840 INFO L229 MonitoredProcess]: Starting monitored process 144 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:47:33,840 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (144)] Waiting until timeout for monitored process [2022-01-18 15:47:33,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:47:33,869 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2022-01-18 15:47:33,869 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:47:34,132 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:47:34,133 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 21 [2022-01-18 15:47:34,264 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 15:47:34,264 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:47:34,510 INFO L353 Elim1Store]: treesize reduction 36, result has 50.7 percent of original size [2022-01-18 15:47:34,510 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 27 treesize of output 48 [2022-01-18 15:47:34,575 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:47:34,575 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:47:34,576 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:47:34,577 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:47:34,577 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 27 treesize of output 7 [2022-01-18 15:47:34,633 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 15:47:34,633 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [909406433] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:47:34,633 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:47:34,633 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 31 [2022-01-18 15:47:34,633 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [141206446] [2022-01-18 15:47:34,634 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:47:34,634 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-01-18 15:47:34,634 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:47:34,634 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-01-18 15:47:34,634 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=872, Unknown=0, NotChecked=0, Total=992 [2022-01-18 15:47:34,634 INFO L87 Difference]: Start difference. First operand 8331 states and 36639 transitions. Second operand has 32 states, 32 states have (on average 2.46875) internal successors, (79), 31 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:47:37,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:47:37,298 INFO L93 Difference]: Finished difference Result 10514 states and 45131 transitions. [2022-01-18 15:47:37,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-01-18 15:47:37,298 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.46875) internal successors, (79), 31 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 15:47:37,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:47:37,326 INFO L225 Difference]: With dead ends: 10514 [2022-01-18 15:47:37,326 INFO L226 Difference]: Without dead ends: 10463 [2022-01-18 15:47:37,326 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 44 SyntacticMatches, 4 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 933 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=464, Invalid=3318, Unknown=0, NotChecked=0, Total=3782 [2022-01-18 15:47:37,326 INFO L933 BasicCegarLoop]: 76 mSDtfsCounter, 555 mSDsluCounter, 3606 mSDsCounter, 0 mSdLazyCounter, 4672 mSolverCounterSat, 84 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 555 SdHoareTripleChecker+Valid, 1433 SdHoareTripleChecker+Invalid, 4756 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 84 IncrementalHoareTripleChecker+Valid, 4672 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-01-18 15:47:37,326 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [555 Valid, 1433 Invalid, 4756 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [84 Valid, 4672 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-01-18 15:47:37,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10463 states. [2022-01-18 15:47:37,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10463 to 8720. [2022-01-18 15:47:37,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8720 states, 8719 states have (on average 4.40910654891616) internal successors, (38443), 8719 states have internal predecessors, (38443), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:47:37,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8720 states to 8720 states and 38443 transitions. [2022-01-18 15:47:37,507 INFO L78 Accepts]: Start accepts. Automaton has 8720 states and 38443 transitions. Word has length 33 [2022-01-18 15:47:37,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:47:37,507 INFO L470 AbstractCegarLoop]: Abstraction has 8720 states and 38443 transitions. [2022-01-18 15:47:37,507 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.46875) internal successors, (79), 31 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:47:37,507 INFO L276 IsEmpty]: Start isEmpty. Operand 8720 states and 38443 transitions. [2022-01-18 15:47:37,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 15:47:37,524 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:47:37,524 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, 1, 1, 1, 1, 1] [2022-01-18 15:47:37,539 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (144)] Ended with exit code 0 [2022-01-18 15:47:37,724 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,SelfDestructingSolverStorable147 [2022-01-18 15:47:37,724 INFO L402 AbstractCegarLoop]: === Iteration 149 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-01-18 15:47:37,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:47:37,724 INFO L85 PathProgramCache]: Analyzing trace with hash -1413929499, now seen corresponding path program 50 times [2022-01-18 15:47:37,724 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:47:37,725 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1582719486] [2022-01-18 15:47:37,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:47:37,725 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:47:37,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:47:37,989 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 15:47:37,989 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:47:37,990 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1582719486] [2022-01-18 15:47:37,990 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1582719486] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:47:37,990 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [347430144] [2022-01-18 15:47:37,990 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 15:47:37,990 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:47:37,990 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:47:37,991 INFO L229 MonitoredProcess]: Starting monitored process 145 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:47:37,991 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (145)] Waiting until timeout for monitored process [2022-01-18 15:47:38,021 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:47:38,021 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:47:38,022 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2022-01-18 15:47:38,022 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:47:38,301 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:47:38,301 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 3 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 49 [2022-01-18 15:47:38,791 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 15:47:38,791 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:47:39,059 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:47:39,060 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 22 [2022-01-18 15:47:39,068 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:47:39,068 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 7 [2022-01-18 15:47:39,112 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 15:47:39,112 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [347430144] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:47:39,112 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:47:39,112 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 34 [2022-01-18 15:47:39,112 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1268117003] [2022-01-18 15:47:39,113 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:47:39,113 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-01-18 15:47:39,113 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:47:39,113 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-01-18 15:47:39,113 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=1065, Unknown=0, NotChecked=0, Total=1190 [2022-01-18 15:47:39,113 INFO L87 Difference]: Start difference. First operand 8720 states and 38443 transitions. Second operand has 35 states, 35 states have (on average 2.2) internal successors, (77), 34 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:47:42,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:47:42,462 INFO L93 Difference]: Finished difference Result 10869 states and 46150 transitions. [2022-01-18 15:47:42,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-01-18 15:47:42,463 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.2) internal successors, (77), 34 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 15:47:42,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:47:42,491 INFO L225 Difference]: With dead ends: 10869 [2022-01-18 15:47:42,491 INFO L226 Difference]: Without dead ends: 10839 [2022-01-18 15:47:42,491 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 44 SyntacticMatches, 4 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1230 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=572, Invalid=4258, Unknown=0, NotChecked=0, Total=4830 [2022-01-18 15:47:42,492 INFO L933 BasicCegarLoop]: 64 mSDtfsCounter, 1075 mSDsluCounter, 3202 mSDsCounter, 0 mSdLazyCounter, 3926 mSolverCounterSat, 155 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1075 SdHoareTripleChecker+Valid, 1284 SdHoareTripleChecker+Invalid, 4499 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 155 IncrementalHoareTripleChecker+Valid, 3926 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 418 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-01-18 15:47:42,492 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1075 Valid, 1284 Invalid, 4499 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [155 Valid, 3926 Invalid, 0 Unknown, 418 Unchecked, 1.6s Time] [2022-01-18 15:47:42,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10839 states. [2022-01-18 15:47:42,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10839 to 8986. [2022-01-18 15:47:42,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8986 states, 8985 states have (on average 4.415358931552587) internal successors, (39672), 8985 states have internal predecessors, (39672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:47:42,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8986 states to 8986 states and 39672 transitions. [2022-01-18 15:47:42,677 INFO L78 Accepts]: Start accepts. Automaton has 8986 states and 39672 transitions. Word has length 33 [2022-01-18 15:47:42,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:47:42,677 INFO L470 AbstractCegarLoop]: Abstraction has 8986 states and 39672 transitions. [2022-01-18 15:47:42,677 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.2) internal successors, (77), 34 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:47:42,677 INFO L276 IsEmpty]: Start isEmpty. Operand 8986 states and 39672 transitions. [2022-01-18 15:47:42,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 15:47:42,693 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:47:42,694 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, 1, 1, 1, 1, 1] [2022-01-18 15:47:42,708 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (145)] Ended with exit code 0 [2022-01-18 15:47:42,894 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,SelfDestructingSolverStorable148 [2022-01-18 15:47:42,894 INFO L402 AbstractCegarLoop]: === Iteration 150 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-01-18 15:47:42,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:47:42,894 INFO L85 PathProgramCache]: Analyzing trace with hash -1951256657, now seen corresponding path program 51 times [2022-01-18 15:47:42,894 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:47:42,894 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1089192535] [2022-01-18 15:47:42,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:47:42,894 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:47:42,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:47:43,132 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 15:47:43,133 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:47:43,133 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1089192535] [2022-01-18 15:47:43,133 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1089192535] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:47:43,133 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [666056318] [2022-01-18 15:47:43,133 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 15:47:43,133 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:47:43,133 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:47:43,134 INFO L229 MonitoredProcess]: Starting monitored process 146 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:47:43,134 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (146)] Waiting until timeout for monitored process [2022-01-18 15:47:43,163 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-01-18 15:47:43,163 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:47:43,164 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 43 conjunts are in the unsatisfiable core [2022-01-18 15:47:43,164 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:47:43,418 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:47:43,437 INFO L353 Elim1Store]: treesize reduction 12, result has 76.5 percent of original size [2022-01-18 15:47:43,437 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 31 treesize of output 57 [2022-01-18 15:47:43,739 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 15:47:43,739 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:47:44,047 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 15:47:44,047 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [666056318] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:47:44,047 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:47:44,047 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 13] total 34 [2022-01-18 15:47:44,047 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1099031183] [2022-01-18 15:47:44,047 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:47:44,047 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-01-18 15:47:44,047 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:47:44,047 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-01-18 15:47:44,048 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=1072, Unknown=0, NotChecked=0, Total=1190 [2022-01-18 15:47:44,048 INFO L87 Difference]: Start difference. First operand 8986 states and 39672 transitions. Second operand has 35 states, 35 states have (on average 2.3714285714285714) internal successors, (83), 34 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:47:47,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:47:47,781 INFO L93 Difference]: Finished difference Result 10851 states and 46437 transitions. [2022-01-18 15:47:47,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-01-18 15:47:47,781 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.3714285714285714) internal successors, (83), 34 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 15:47:47,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:47:47,812 INFO L225 Difference]: With dead ends: 10851 [2022-01-18 15:47:47,812 INFO L226 Difference]: Without dead ends: 10821 [2022-01-18 15:47:47,812 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 42 SyntacticMatches, 3 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1299 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=585, Invalid=4527, Unknown=0, NotChecked=0, Total=5112 [2022-01-18 15:47:47,812 INFO L933 BasicCegarLoop]: 59 mSDtfsCounter, 1094 mSDsluCounter, 3612 mSDsCounter, 0 mSdLazyCounter, 4858 mSolverCounterSat, 155 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1094 SdHoareTripleChecker+Valid, 1359 SdHoareTripleChecker+Invalid, 5013 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 155 IncrementalHoareTripleChecker+Valid, 4858 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-01-18 15:47:47,813 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1094 Valid, 1359 Invalid, 5013 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [155 Valid, 4858 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2022-01-18 15:47:47,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10821 states. [2022-01-18 15:47:47,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10821 to 9150. [2022-01-18 15:47:48,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9150 states, 9149 states have (on average 4.4194993988414035) internal successors, (40434), 9149 states have internal predecessors, (40434), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:47:48,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9150 states to 9150 states and 40434 transitions. [2022-01-18 15:47:48,030 INFO L78 Accepts]: Start accepts. Automaton has 9150 states and 40434 transitions. Word has length 33 [2022-01-18 15:47:48,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:47:48,030 INFO L470 AbstractCegarLoop]: Abstraction has 9150 states and 40434 transitions. [2022-01-18 15:47:48,030 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.3714285714285714) internal successors, (83), 34 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:47:48,030 INFO L276 IsEmpty]: Start isEmpty. Operand 9150 states and 40434 transitions. [2022-01-18 15:47:48,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 15:47:48,049 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:47:48,049 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, 1, 1, 1, 1, 1] [2022-01-18 15:47:48,064 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (146)] Ended with exit code 0 [2022-01-18 15:47:48,249 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable149,146 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:47:48,249 INFO L402 AbstractCegarLoop]: === Iteration 151 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-01-18 15:47:48,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:47:48,250 INFO L85 PathProgramCache]: Analyzing trace with hash 648899597, now seen corresponding path program 52 times [2022-01-18 15:47:48,250 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:47:48,250 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1789914591] [2022-01-18 15:47:48,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:47:48,250 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:47:48,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:47:48,477 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 15:47:48,477 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:47:48,477 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1789914591] [2022-01-18 15:47:48,477 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1789914591] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:47:48,477 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1347438003] [2022-01-18 15:47:48,477 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 15:47:48,477 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:47:48,477 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:47:48,478 INFO L229 MonitoredProcess]: Starting monitored process 147 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:47:48,478 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (147)] Waiting until timeout for monitored process [2022-01-18 15:47:48,507 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 15:47:48,507 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:47:48,508 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2022-01-18 15:47:48,508 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:47:48,843 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:47:48,843 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 19 [2022-01-18 15:47:48,985 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 15:47:48,985 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:47:49,279 INFO L353 Elim1Store]: treesize reduction 36, result has 50.7 percent of original size [2022-01-18 15:47:49,279 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 27 treesize of output 48 [2022-01-18 15:47:49,335 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:47:49,335 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:47:49,336 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:47:49,336 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:47:49,336 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 27 treesize of output 7 [2022-01-18 15:47:49,380 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 15:47:49,380 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1347438003] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:47:49,380 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:47:49,380 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 32 [2022-01-18 15:47:49,380 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [463125616] [2022-01-18 15:47:49,380 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:47:49,380 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-01-18 15:47:49,380 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:47:49,381 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-01-18 15:47:49,381 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=965, Unknown=0, NotChecked=0, Total=1056 [2022-01-18 15:47:49,381 INFO L87 Difference]: Start difference. First operand 9150 states and 40434 transitions. Second operand has 33 states, 33 states have (on average 2.4545454545454546) internal successors, (81), 32 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:47:53,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:47:53,442 INFO L93 Difference]: Finished difference Result 11007 states and 47193 transitions. [2022-01-18 15:47:53,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2022-01-18 15:47:53,442 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.4545454545454546) internal successors, (81), 32 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 15:47:53,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:47:53,472 INFO L225 Difference]: With dead ends: 11007 [2022-01-18 15:47:53,472 INFO L226 Difference]: Without dead ends: 10992 [2022-01-18 15:47:53,473 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 43 SyntacticMatches, 4 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1321 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=534, Invalid=5016, Unknown=0, NotChecked=0, Total=5550 [2022-01-18 15:47:53,473 INFO L933 BasicCegarLoop]: 75 mSDtfsCounter, 731 mSDsluCounter, 3602 mSDsCounter, 0 mSdLazyCounter, 4797 mSolverCounterSat, 133 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 731 SdHoareTripleChecker+Valid, 1480 SdHoareTripleChecker+Invalid, 4930 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 133 IncrementalHoareTripleChecker+Valid, 4797 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-01-18 15:47:53,473 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [731 Valid, 1480 Invalid, 4930 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [133 Valid, 4797 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2022-01-18 15:47:53,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10992 states. [2022-01-18 15:47:53,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10992 to 9150. [2022-01-18 15:47:53,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9150 states, 9149 states have (on average 4.4194993988414035) internal successors, (40434), 9149 states have internal predecessors, (40434), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:47:53,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9150 states to 9150 states and 40434 transitions. [2022-01-18 15:47:53,707 INFO L78 Accepts]: Start accepts. Automaton has 9150 states and 40434 transitions. Word has length 33 [2022-01-18 15:47:53,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:47:53,707 INFO L470 AbstractCegarLoop]: Abstraction has 9150 states and 40434 transitions. [2022-01-18 15:47:53,707 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.4545454545454546) internal successors, (81), 32 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:47:53,707 INFO L276 IsEmpty]: Start isEmpty. Operand 9150 states and 40434 transitions. [2022-01-18 15:47:53,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 15:47:53,724 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:47:53,724 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, 1, 1, 1, 1, 1] [2022-01-18 15:47:53,739 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (147)] Ended with exit code 0 [2022-01-18 15:47:53,924 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable150,147 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:47:53,925 INFO L402 AbstractCegarLoop]: === Iteration 152 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-01-18 15:47:53,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:47:53,925 INFO L85 PathProgramCache]: Analyzing trace with hash -1561474901, now seen corresponding path program 53 times [2022-01-18 15:47:53,925 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:47:53,925 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1130957129] [2022-01-18 15:47:53,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:47:53,925 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:47:53,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:47:54,143 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 15:47:54,143 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:47:54,143 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1130957129] [2022-01-18 15:47:54,143 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1130957129] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:47:54,143 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [163304120] [2022-01-18 15:47:54,143 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 15:47:54,144 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:47:54,144 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:47:54,144 INFO L229 MonitoredProcess]: Starting monitored process 148 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:47:54,145 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (148)] Waiting until timeout for monitored process [2022-01-18 15:47:54,179 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-01-18 15:47:54,179 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:47:54,180 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2022-01-18 15:47:54,180 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:47:54,477 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:47:54,477 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 19 [2022-01-18 15:47:54,624 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 15:47:54,624 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:47:54,890 INFO L353 Elim1Store]: treesize reduction 36, result has 50.7 percent of original size [2022-01-18 15:47:54,890 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 27 treesize of output 48 [2022-01-18 15:47:54,936 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:47:54,936 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:47:54,937 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:47:54,939 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:47:54,939 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 27 treesize of output 7 [2022-01-18 15:47:54,987 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 15:47:54,987 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [163304120] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:47:54,987 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:47:54,988 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 31 [2022-01-18 15:47:54,988 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [402490616] [2022-01-18 15:47:54,988 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:47:54,988 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-01-18 15:47:54,988 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:47:54,988 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-01-18 15:47:54,988 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=891, Unknown=0, NotChecked=0, Total=992 [2022-01-18 15:47:54,989 INFO L87 Difference]: Start difference. First operand 9150 states and 40434 transitions. Second operand has 32 states, 32 states have (on average 2.4375) internal successors, (78), 31 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:47:59,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:47:59,184 INFO L93 Difference]: Finished difference Result 11316 states and 48188 transitions. [2022-01-18 15:47:59,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2022-01-18 15:47:59,184 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.4375) internal successors, (78), 31 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 15:47:59,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:47:59,215 INFO L225 Difference]: With dead ends: 11316 [2022-01-18 15:47:59,215 INFO L226 Difference]: Without dead ends: 11292 [2022-01-18 15:47:59,215 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 44 SyntacticMatches, 4 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1402 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=569, Invalid=4981, Unknown=0, NotChecked=0, Total=5550 [2022-01-18 15:47:59,215 INFO L933 BasicCegarLoop]: 80 mSDtfsCounter, 773 mSDsluCounter, 3986 mSDsCounter, 0 mSdLazyCounter, 5379 mSolverCounterSat, 145 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 773 SdHoareTripleChecker+Valid, 1699 SdHoareTripleChecker+Invalid, 5524 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 145 IncrementalHoareTripleChecker+Valid, 5379 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:47:59,215 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [773 Valid, 1699 Invalid, 5524 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [145 Valid, 5379 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2022-01-18 15:47:59,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11292 states. [2022-01-18 15:47:59,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11292 to 9150. [2022-01-18 15:47:59,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9150 states, 9149 states have (on average 4.4194993988414035) internal successors, (40434), 9149 states have internal predecessors, (40434), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:47:59,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9150 states to 9150 states and 40434 transitions. [2022-01-18 15:47:59,413 INFO L78 Accepts]: Start accepts. Automaton has 9150 states and 40434 transitions. Word has length 33 [2022-01-18 15:47:59,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:47:59,413 INFO L470 AbstractCegarLoop]: Abstraction has 9150 states and 40434 transitions. [2022-01-18 15:47:59,413 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.4375) internal successors, (78), 31 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:47:59,413 INFO L276 IsEmpty]: Start isEmpty. Operand 9150 states and 40434 transitions. [2022-01-18 15:47:59,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 15:47:59,429 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:47:59,429 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, 1, 1, 1, 1, 1] [2022-01-18 15:47:59,445 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (148)] Ended with exit code 0 [2022-01-18 15:47:59,630 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151,148 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:47:59,630 INFO L402 AbstractCegarLoop]: === Iteration 153 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-01-18 15:47:59,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:47:59,630 INFO L85 PathProgramCache]: Analyzing trace with hash -399872805, now seen corresponding path program 54 times [2022-01-18 15:47:59,630 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:47:59,630 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1266835706] [2022-01-18 15:47:59,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:47:59,631 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:47:59,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:47:59,924 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 15:47:59,924 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:47:59,924 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1266835706] [2022-01-18 15:47:59,924 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1266835706] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:47:59,924 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1876290025] [2022-01-18 15:47:59,924 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 15:47:59,924 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:47:59,924 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:47:59,925 INFO L229 MonitoredProcess]: Starting monitored process 149 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:47:59,925 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (149)] Waiting until timeout for monitored process [2022-01-18 15:47:59,955 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-01-18 15:47:59,955 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:47:59,956 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2022-01-18 15:47:59,956 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:48:00,209 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:48:00,223 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 3 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 49 [2022-01-18 15:48:01,027 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 15:48:01,028 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:48:01,276 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:48:01,276 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 22 [2022-01-18 15:48:01,286 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:48:01,286 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 7 [2022-01-18 15:48:01,332 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 15:48:01,332 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1876290025] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:48:01,332 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:48:01,333 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 32 [2022-01-18 15:48:01,333 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1452834837] [2022-01-18 15:48:01,333 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:48:01,333 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-01-18 15:48:01,333 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:48:01,333 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-01-18 15:48:01,333 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=937, Unknown=0, NotChecked=0, Total=1056 [2022-01-18 15:48:01,333 INFO L87 Difference]: Start difference. First operand 9150 states and 40434 transitions. Second operand has 33 states, 33 states have (on average 2.1818181818181817) internal successors, (72), 32 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:48:03,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:48:03,767 INFO L93 Difference]: Finished difference Result 10442 states and 45297 transitions. [2022-01-18 15:48:03,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-01-18 15:48:03,768 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.1818181818181817) internal successors, (72), 32 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 15:48:03,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:48:03,795 INFO L225 Difference]: With dead ends: 10442 [2022-01-18 15:48:03,795 INFO L226 Difference]: Without dead ends: 10412 [2022-01-18 15:48:03,796 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 46 SyntacticMatches, 7 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1094 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=485, Invalid=3547, Unknown=0, NotChecked=0, Total=4032 [2022-01-18 15:48:03,797 INFO L933 BasicCegarLoop]: 61 mSDtfsCounter, 734 mSDsluCounter, 2760 mSDsCounter, 0 mSdLazyCounter, 2827 mSolverCounterSat, 113 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 734 SdHoareTripleChecker+Valid, 1066 SdHoareTripleChecker+Invalid, 3604 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 113 IncrementalHoareTripleChecker+Valid, 2827 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 664 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:48:03,797 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [734 Valid, 1066 Invalid, 3604 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [113 Valid, 2827 Invalid, 0 Unknown, 664 Unchecked, 1.2s Time] [2022-01-18 15:48:03,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10412 states. [2022-01-18 15:48:03,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10412 to 9389. [2022-01-18 15:48:03,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9389 states, 9388 states have (on average 4.415636983383042) internal successors, (41454), 9388 states have internal predecessors, (41454), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:48:03,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9389 states to 9389 states and 41454 transitions. [2022-01-18 15:48:03,978 INFO L78 Accepts]: Start accepts. Automaton has 9389 states and 41454 transitions. Word has length 33 [2022-01-18 15:48:03,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:48:03,978 INFO L470 AbstractCegarLoop]: Abstraction has 9389 states and 41454 transitions. [2022-01-18 15:48:03,978 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.1818181818181817) internal successors, (72), 32 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:48:03,978 INFO L276 IsEmpty]: Start isEmpty. Operand 9389 states and 41454 transitions. [2022-01-18 15:48:03,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 15:48:03,996 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:48:03,996 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, 1, 1, 1, 1, 1] [2022-01-18 15:48:04,011 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (149)] Forceful destruction successful, exit code 0 [2022-01-18 15:48:04,196 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable152,149 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:48:04,196 INFO L402 AbstractCegarLoop]: === Iteration 154 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-01-18 15:48:04,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:48:04,198 INFO L85 PathProgramCache]: Analyzing trace with hash 487630876, now seen corresponding path program 5 times [2022-01-18 15:48:04,198 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:48:04,198 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2142383769] [2022-01-18 15:48:04,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:48:04,198 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:48:04,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:48:04,396 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 15:48:04,397 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:48:04,397 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2142383769] [2022-01-18 15:48:04,397 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2142383769] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:48:04,397 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [387569932] [2022-01-18 15:48:04,397 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 15:48:04,397 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:48:04,397 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:48:04,398 INFO L229 MonitoredProcess]: Starting monitored process 150 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:48:04,399 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (150)] Waiting until timeout for monitored process [2022-01-18 15:48:04,430 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-01-18 15:48:04,431 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:48:04,431 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2022-01-18 15:48:04,432 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:48:04,698 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:48:04,699 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 21 [2022-01-18 15:48:04,834 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 15:48:04,834 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:48:05,098 INFO L353 Elim1Store]: treesize reduction 36, result has 50.7 percent of original size [2022-01-18 15:48:05,098 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 27 treesize of output 48 [2022-01-18 15:48:05,160 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:48:05,160 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:48:05,161 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:48:05,161 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:48:05,161 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 27 treesize of output 7 [2022-01-18 15:48:05,209 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 15:48:05,209 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [387569932] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:48:05,209 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:48:05,209 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 32 [2022-01-18 15:48:05,209 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [941556460] [2022-01-18 15:48:05,209 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:48:05,209 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-01-18 15:48:05,209 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:48:05,209 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-01-18 15:48:05,210 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=927, Unknown=0, NotChecked=0, Total=1056 [2022-01-18 15:48:05,210 INFO L87 Difference]: Start difference. First operand 9389 states and 41454 transitions. Second operand has 33 states, 33 states have (on average 2.515151515151515) internal successors, (83), 32 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:48:07,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:48:07,979 INFO L93 Difference]: Finished difference Result 11328 states and 48701 transitions. [2022-01-18 15:48:07,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2022-01-18 15:48:07,979 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.515151515151515) internal successors, (83), 32 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 15:48:07,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:48:08,008 INFO L225 Difference]: With dead ends: 11328 [2022-01-18 15:48:08,008 INFO L226 Difference]: Without dead ends: 11198 [2022-01-18 15:48:08,008 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 43 SyntacticMatches, 4 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1403 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=641, Invalid=4615, Unknown=0, NotChecked=0, Total=5256 [2022-01-18 15:48:08,009 INFO L933 BasicCegarLoop]: 62 mSDtfsCounter, 696 mSDsluCounter, 2913 mSDsCounter, 0 mSdLazyCounter, 4054 mSolverCounterSat, 123 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 696 SdHoareTripleChecker+Valid, 1146 SdHoareTripleChecker+Invalid, 4177 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 123 IncrementalHoareTripleChecker+Valid, 4054 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-01-18 15:48:08,009 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [696 Valid, 1146 Invalid, 4177 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [123 Valid, 4054 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-01-18 15:48:08,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11198 states. [2022-01-18 15:48:08,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11198 to 9157. [2022-01-18 15:48:08,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9157 states, 9156 states have (on average 4.424639580602883) internal successors, (40512), 9156 states have internal predecessors, (40512), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:48:08,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9157 states to 9157 states and 40512 transitions. [2022-01-18 15:48:08,195 INFO L78 Accepts]: Start accepts. Automaton has 9157 states and 40512 transitions. Word has length 33 [2022-01-18 15:48:08,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:48:08,195 INFO L470 AbstractCegarLoop]: Abstraction has 9157 states and 40512 transitions. [2022-01-18 15:48:08,195 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.515151515151515) internal successors, (83), 32 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:48:08,195 INFO L276 IsEmpty]: Start isEmpty. Operand 9157 states and 40512 transitions. [2022-01-18 15:48:08,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 15:48:08,211 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:48:08,211 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, 1, 1, 1, 1, 1] [2022-01-18 15:48:08,233 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (150)] Ended with exit code 0 [2022-01-18 15:48:08,412 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable153,150 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:48:08,412 INFO L402 AbstractCegarLoop]: === Iteration 155 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-01-18 15:48:08,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:48:08,412 INFO L85 PathProgramCache]: Analyzing trace with hash 119359515, now seen corresponding path program 55 times [2022-01-18 15:48:08,412 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:48:08,412 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1499949547] [2022-01-18 15:48:08,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:48:08,412 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:48:08,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:48:08,614 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 15:48:08,614 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:48:08,614 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1499949547] [2022-01-18 15:48:08,614 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1499949547] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:48:08,614 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1275371665] [2022-01-18 15:48:08,614 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 15:48:08,615 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:48:08,615 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:48:08,615 INFO L229 MonitoredProcess]: Starting monitored process 151 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:48:08,616 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (151)] Waiting until timeout for monitored process [2022-01-18 15:48:08,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:48:08,646 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2022-01-18 15:48:08,646 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:48:08,916 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:48:08,916 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 21 [2022-01-18 15:48:09,048 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 15:48:09,048 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:48:09,331 INFO L353 Elim1Store]: treesize reduction 36, result has 50.7 percent of original size [2022-01-18 15:48:09,331 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 27 treesize of output 48 [2022-01-18 15:48:09,429 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:48:09,430 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:48:09,430 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:48:09,431 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:48:09,431 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 27 treesize of output 7 [2022-01-18 15:48:09,477 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 15:48:09,478 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1275371665] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:48:09,478 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:48:09,478 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 32 [2022-01-18 15:48:09,478 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [475446315] [2022-01-18 15:48:09,478 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:48:09,478 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-01-18 15:48:09,478 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:48:09,478 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-01-18 15:48:09,478 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=953, Unknown=0, NotChecked=0, Total=1056 [2022-01-18 15:48:09,479 INFO L87 Difference]: Start difference. First operand 9157 states and 40512 transitions. Second operand has 33 states, 33 states have (on average 2.515151515151515) internal successors, (83), 32 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:48:12,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:48:12,496 INFO L93 Difference]: Finished difference Result 10339 states and 45035 transitions. [2022-01-18 15:48:12,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-01-18 15:48:12,496 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.515151515151515) internal successors, (83), 32 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 15:48:12,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:48:12,524 INFO L225 Difference]: With dead ends: 10339 [2022-01-18 15:48:12,524 INFO L226 Difference]: Without dead ends: 10261 [2022-01-18 15:48:12,525 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 43 SyntacticMatches, 4 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1261 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=473, Invalid=4497, Unknown=0, NotChecked=0, Total=4970 [2022-01-18 15:48:12,525 INFO L933 BasicCegarLoop]: 64 mSDtfsCounter, 541 mSDsluCounter, 3622 mSDsCounter, 0 mSdLazyCounter, 4968 mSolverCounterSat, 95 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 541 SdHoareTripleChecker+Valid, 1396 SdHoareTripleChecker+Invalid, 5063 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 95 IncrementalHoareTripleChecker+Valid, 4968 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-01-18 15:48:12,525 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [541 Valid, 1396 Invalid, 5063 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [95 Valid, 4968 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-01-18 15:48:12,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10261 states. [2022-01-18 15:48:12,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10261 to 9142. [2022-01-18 15:48:12,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9142 states, 9141 states have (on average 4.4254457936768405) internal successors, (40453), 9141 states have internal predecessors, (40453), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:48:12,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9142 states to 9142 states and 40453 transitions. [2022-01-18 15:48:12,700 INFO L78 Accepts]: Start accepts. Automaton has 9142 states and 40453 transitions. Word has length 33 [2022-01-18 15:48:12,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:48:12,700 INFO L470 AbstractCegarLoop]: Abstraction has 9142 states and 40453 transitions. [2022-01-18 15:48:12,700 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.515151515151515) internal successors, (83), 32 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:48:12,700 INFO L276 IsEmpty]: Start isEmpty. Operand 9142 states and 40453 transitions. [2022-01-18 15:48:12,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 15:48:12,717 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:48:12,717 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, 1, 1, 1, 1, 1] [2022-01-18 15:48:12,735 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (151)] Forceful destruction successful, exit code 0 [2022-01-18 15:48:12,917 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable154,151 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:48:12,917 INFO L402 AbstractCegarLoop]: === Iteration 156 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-01-18 15:48:12,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:48:12,917 INFO L85 PathProgramCache]: Analyzing trace with hash -1984743527, now seen corresponding path program 56 times [2022-01-18 15:48:12,917 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:48:12,917 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [886707427] [2022-01-18 15:48:12,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:48:12,918 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:48:12,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:48:13,082 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 15:48:13,082 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:48:13,082 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [886707427] [2022-01-18 15:48:13,082 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [886707427] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:48:13,082 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [142258421] [2022-01-18 15:48:13,082 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 15:48:13,082 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:48:13,082 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:48:13,083 INFO L229 MonitoredProcess]: Starting monitored process 152 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:48:13,084 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (152)] Waiting until timeout for monitored process [2022-01-18 15:48:13,115 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:48:13,115 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:48:13,116 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2022-01-18 15:48:13,116 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:48:13,539 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:48:13,561 INFO L353 Elim1Store]: treesize reduction 14, result has 72.5 percent of original size [2022-01-18 15:48:13,561 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 36 treesize of output 60 [2022-01-18 15:48:13,710 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 15:48:13,710 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:48:14,055 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 15:48:14,055 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [142258421] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:48:14,055 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:48:14,055 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 34 [2022-01-18 15:48:14,055 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [69215813] [2022-01-18 15:48:14,055 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:48:14,055 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-01-18 15:48:14,055 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:48:14,056 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-01-18 15:48:14,056 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=1082, Unknown=0, NotChecked=0, Total=1190 [2022-01-18 15:48:14,056 INFO L87 Difference]: Start difference. First operand 9142 states and 40453 transitions. Second operand has 35 states, 35 states have (on average 2.4285714285714284) internal successors, (85), 34 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:48:17,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:48:17,569 INFO L93 Difference]: Finished difference Result 11651 states and 50339 transitions. [2022-01-18 15:48:17,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2022-01-18 15:48:17,570 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.4285714285714284) internal successors, (85), 34 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 15:48:17,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:48:17,600 INFO L225 Difference]: With dead ends: 11651 [2022-01-18 15:48:17,600 INFO L226 Difference]: Without dead ends: 11586 [2022-01-18 15:48:17,601 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 42 SyntacticMatches, 3 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1462 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=573, Invalid=5907, Unknown=0, NotChecked=0, Total=6480 [2022-01-18 15:48:17,601 INFO L933 BasicCegarLoop]: 62 mSDtfsCounter, 983 mSDsluCounter, 3217 mSDsCounter, 0 mSdLazyCounter, 4125 mSolverCounterSat, 181 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 983 SdHoareTripleChecker+Valid, 1302 SdHoareTripleChecker+Invalid, 4306 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 181 IncrementalHoareTripleChecker+Valid, 4125 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-01-18 15:48:17,601 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [983 Valid, 1302 Invalid, 4306 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [181 Valid, 4125 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-01-18 15:48:17,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11586 states. [2022-01-18 15:48:17,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11586 to 9220. [2022-01-18 15:48:17,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9220 states, 9219 states have (on average 4.428354485302093) internal successors, (40825), 9219 states have internal predecessors, (40825), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:48:17,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9220 states to 9220 states and 40825 transitions. [2022-01-18 15:48:17,845 INFO L78 Accepts]: Start accepts. Automaton has 9220 states and 40825 transitions. Word has length 33 [2022-01-18 15:48:17,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:48:17,845 INFO L470 AbstractCegarLoop]: Abstraction has 9220 states and 40825 transitions. [2022-01-18 15:48:17,845 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.4285714285714284) internal successors, (85), 34 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:48:17,845 INFO L276 IsEmpty]: Start isEmpty. Operand 9220 states and 40825 transitions. [2022-01-18 15:48:17,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 15:48:17,862 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:48:17,862 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, 1, 1, 1, 1, 1] [2022-01-18 15:48:17,877 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (152)] Ended with exit code 0 [2022-01-18 15:48:18,062 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 152 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable155 [2022-01-18 15:48:18,063 INFO L402 AbstractCegarLoop]: === Iteration 157 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-01-18 15:48:18,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:48:18,063 INFO L85 PathProgramCache]: Analyzing trace with hash 51101753, now seen corresponding path program 57 times [2022-01-18 15:48:18,063 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:48:18,063 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [849129358] [2022-01-18 15:48:18,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:48:18,063 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:48:18,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:48:18,227 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 15:48:18,227 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:48:18,227 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [849129358] [2022-01-18 15:48:18,227 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [849129358] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:48:18,227 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [739797582] [2022-01-18 15:48:18,227 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 15:48:18,227 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:48:18,227 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:48:18,228 INFO L229 MonitoredProcess]: Starting monitored process 153 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:48:18,229 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (153)] Waiting until timeout for monitored process [2022-01-18 15:48:18,258 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 15:48:18,258 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:48:18,259 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2022-01-18 15:48:18,259 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:48:18,536 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:48:18,556 INFO L353 Elim1Store]: treesize reduction 12, result has 76.5 percent of original size [2022-01-18 15:48:18,556 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 33 treesize of output 59 [2022-01-18 15:48:18,796 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 15:48:18,796 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:48:19,073 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 15:48:19,073 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [739797582] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:48:19,074 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:48:19,074 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 32 [2022-01-18 15:48:19,074 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1001983636] [2022-01-18 15:48:19,074 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:48:19,074 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-01-18 15:48:19,074 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:48:19,074 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-01-18 15:48:19,074 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=949, Unknown=0, NotChecked=0, Total=1056 [2022-01-18 15:48:19,074 INFO L87 Difference]: Start difference. First operand 9220 states and 40825 transitions. Second operand has 33 states, 33 states have (on average 2.393939393939394) internal successors, (79), 32 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:48:23,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:48:23,554 INFO L93 Difference]: Finished difference Result 13656 states and 58400 transitions. [2022-01-18 15:48:23,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2022-01-18 15:48:23,554 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.393939393939394) internal successors, (79), 32 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 15:48:23,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:48:23,591 INFO L225 Difference]: With dead ends: 13656 [2022-01-18 15:48:23,591 INFO L226 Difference]: Without dead ends: 13606 [2022-01-18 15:48:23,592 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 44 SyntacticMatches, 3 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2498 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=873, Invalid=8057, Unknown=0, NotChecked=0, Total=8930 [2022-01-18 15:48:23,592 INFO L933 BasicCegarLoop]: 82 mSDtfsCounter, 1391 mSDsluCounter, 4263 mSDsCounter, 0 mSdLazyCounter, 5693 mSolverCounterSat, 270 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1391 SdHoareTripleChecker+Valid, 1693 SdHoareTripleChecker+Invalid, 5963 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 270 IncrementalHoareTripleChecker+Valid, 5693 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2022-01-18 15:48:23,592 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1391 Valid, 1693 Invalid, 5963 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [270 Valid, 5693 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2022-01-18 15:48:23,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13606 states. [2022-01-18 15:48:23,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13606 to 9526. [2022-01-18 15:48:23,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9526 states, 9525 states have (on average 4.4503937007874015) internal successors, (42390), 9525 states have internal predecessors, (42390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:48:23,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9526 states to 9526 states and 42390 transitions. [2022-01-18 15:48:23,819 INFO L78 Accepts]: Start accepts. Automaton has 9526 states and 42390 transitions. Word has length 33 [2022-01-18 15:48:23,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:48:23,819 INFO L470 AbstractCegarLoop]: Abstraction has 9526 states and 42390 transitions. [2022-01-18 15:48:23,819 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.393939393939394) internal successors, (79), 32 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:48:23,819 INFO L276 IsEmpty]: Start isEmpty. Operand 9526 states and 42390 transitions. [2022-01-18 15:48:23,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 15:48:23,837 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:48:23,837 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, 1, 1, 1, 1, 1] [2022-01-18 15:48:23,853 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (153)] Ended with exit code 0 [2022-01-18 15:48:24,038 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 153 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable156 [2022-01-18 15:48:24,038 INFO L402 AbstractCegarLoop]: === Iteration 158 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-01-18 15:48:24,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:48:24,038 INFO L85 PathProgramCache]: Analyzing trace with hash 1354374359, now seen corresponding path program 58 times [2022-01-18 15:48:24,038 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:48:24,038 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1098487991] [2022-01-18 15:48:24,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:48:24,038 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:48:24,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:48:24,201 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 15:48:24,201 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:48:24,201 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1098487991] [2022-01-18 15:48:24,201 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1098487991] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:48:24,201 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [323349360] [2022-01-18 15:48:24,201 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 15:48:24,201 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:48:24,202 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:48:24,202 INFO L229 MonitoredProcess]: Starting monitored process 154 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:48:24,203 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (154)] Waiting until timeout for monitored process [2022-01-18 15:48:24,233 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 15:48:24,234 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:48:24,234 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2022-01-18 15:48:24,235 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:48:24,535 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:48:24,535 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 21 [2022-01-18 15:48:24,650 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 15:48:24,651 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:48:24,904 INFO L353 Elim1Store]: treesize reduction 36, result has 50.7 percent of original size [2022-01-18 15:48:24,904 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 27 treesize of output 48 [2022-01-18 15:48:24,978 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:48:24,979 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:48:24,979 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:48:24,980 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:48:24,980 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 7 [2022-01-18 15:48:25,029 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 15:48:25,030 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [323349360] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:48:25,030 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:48:25,030 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 31 [2022-01-18 15:48:25,030 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [218580959] [2022-01-18 15:48:25,030 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:48:25,030 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-01-18 15:48:25,030 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:48:25,030 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-01-18 15:48:25,030 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=880, Unknown=0, NotChecked=0, Total=992 [2022-01-18 15:48:25,030 INFO L87 Difference]: Start difference. First operand 9526 states and 42390 transitions. Second operand has 32 states, 32 states have (on average 2.46875) internal successors, (79), 31 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:48:26,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:48:26,852 INFO L93 Difference]: Finished difference Result 11176 states and 48742 transitions. [2022-01-18 15:48:26,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-01-18 15:48:26,852 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.46875) internal successors, (79), 31 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 15:48:26,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:48:26,882 INFO L225 Difference]: With dead ends: 11176 [2022-01-18 15:48:26,882 INFO L226 Difference]: Without dead ends: 11140 [2022-01-18 15:48:26,882 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 44 SyntacticMatches, 4 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 637 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=288, Invalid=2468, Unknown=0, NotChecked=0, Total=2756 [2022-01-18 15:48:26,882 INFO L933 BasicCegarLoop]: 55 mSDtfsCounter, 648 mSDsluCounter, 2376 mSDsCounter, 0 mSdLazyCounter, 3238 mSolverCounterSat, 85 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 648 SdHoareTripleChecker+Valid, 922 SdHoareTripleChecker+Invalid, 3323 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 85 IncrementalHoareTripleChecker+Valid, 3238 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:48:26,882 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [648 Valid, 922 Invalid, 3323 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [85 Valid, 3238 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-01-18 15:48:26,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11140 states. [2022-01-18 15:48:27,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11140 to 9777. [2022-01-18 15:48:27,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9777 states, 9776 states have (on average 4.457037643207856) internal successors, (43572), 9776 states have internal predecessors, (43572), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:48:27,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9777 states to 9777 states and 43572 transitions. [2022-01-18 15:48:27,094 INFO L78 Accepts]: Start accepts. Automaton has 9777 states and 43572 transitions. Word has length 33 [2022-01-18 15:48:27,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:48:27,094 INFO L470 AbstractCegarLoop]: Abstraction has 9777 states and 43572 transitions. [2022-01-18 15:48:27,094 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.46875) internal successors, (79), 31 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:48:27,094 INFO L276 IsEmpty]: Start isEmpty. Operand 9777 states and 43572 transitions. [2022-01-18 15:48:27,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 15:48:27,113 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:48:27,113 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, 1, 1, 1, 1, 1] [2022-01-18 15:48:27,128 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (154)] Ended with exit code 0 [2022-01-18 15:48:27,313 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 154 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable157 [2022-01-18 15:48:27,314 INFO L402 AbstractCegarLoop]: === Iteration 159 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-01-18 15:48:27,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:48:27,314 INFO L85 PathProgramCache]: Analyzing trace with hash 1300987839, now seen corresponding path program 59 times [2022-01-18 15:48:27,314 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:48:27,314 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [145390344] [2022-01-18 15:48:27,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:48:27,314 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:48:27,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:48:27,526 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 15:48:27,526 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:48:27,526 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [145390344] [2022-01-18 15:48:27,526 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [145390344] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:48:27,526 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [41579725] [2022-01-18 15:48:27,527 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 15:48:27,527 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:48:27,527 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:48:27,528 INFO L229 MonitoredProcess]: Starting monitored process 155 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:48:27,529 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (155)] Waiting until timeout for monitored process [2022-01-18 15:48:27,558 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 15:48:27,558 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:48:27,559 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 44 conjunts are in the unsatisfiable core [2022-01-18 15:48:27,559 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:48:27,874 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:48:27,875 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 35 treesize of output 21 [2022-01-18 15:48:28,031 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 15:48:28,032 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:48:28,348 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:48:28,355 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:48:28,356 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:48:28,366 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:48:28,366 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 27 treesize of output 48 [2022-01-18 15:48:28,390 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:48:28,391 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:48:28,391 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:48:28,392 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:48:28,392 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 27 treesize of output 7 [2022-01-18 15:48:28,460 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 15:48:28,461 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [41579725] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:48:28,461 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:48:28,461 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 34 [2022-01-18 15:48:28,461 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1077036912] [2022-01-18 15:48:28,461 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:48:28,461 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-01-18 15:48:28,461 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:48:28,461 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-01-18 15:48:28,461 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=148, Invalid=1042, Unknown=0, NotChecked=0, Total=1190 [2022-01-18 15:48:28,462 INFO L87 Difference]: Start difference. First operand 9777 states and 43572 transitions. Second operand has 35 states, 35 states have (on average 2.4285714285714284) internal successors, (85), 34 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:48:36,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:48:36,196 INFO L93 Difference]: Finished difference Result 13528 states and 57066 transitions. [2022-01-18 15:48:36,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 105 states. [2022-01-18 15:48:36,196 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.4285714285714284) internal successors, (85), 34 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 15:48:36,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:48:36,233 INFO L225 Difference]: With dead ends: 13528 [2022-01-18 15:48:36,233 INFO L226 Difference]: Without dead ends: 13439 [2022-01-18 15:48:36,234 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 42 SyntacticMatches, 3 SemanticMatches, 117 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4692 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=1813, Invalid=12229, Unknown=0, NotChecked=0, Total=14042 [2022-01-18 15:48:36,234 INFO L933 BasicCegarLoop]: 86 mSDtfsCounter, 1737 mSDsluCounter, 4563 mSDsCounter, 0 mSdLazyCounter, 6214 mSolverCounterSat, 297 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1737 SdHoareTripleChecker+Valid, 1787 SdHoareTripleChecker+Invalid, 6511 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 297 IncrementalHoareTripleChecker+Valid, 6214 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2022-01-18 15:48:36,234 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1737 Valid, 1787 Invalid, 6511 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [297 Valid, 6214 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2022-01-18 15:48:36,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13439 states. [2022-01-18 15:48:36,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13439 to 9963. [2022-01-18 15:48:36,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9963 states, 9962 states have (on average 4.463260389480024) internal successors, (44463), 9962 states have internal predecessors, (44463), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:48:36,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9963 states to 9963 states and 44463 transitions. [2022-01-18 15:48:36,462 INFO L78 Accepts]: Start accepts. Automaton has 9963 states and 44463 transitions. Word has length 33 [2022-01-18 15:48:36,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:48:36,462 INFO L470 AbstractCegarLoop]: Abstraction has 9963 states and 44463 transitions. [2022-01-18 15:48:36,462 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.4285714285714284) internal successors, (85), 34 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:48:36,462 INFO L276 IsEmpty]: Start isEmpty. Operand 9963 states and 44463 transitions. [2022-01-18 15:48:36,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 15:48:36,481 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:48:36,481 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, 1, 1, 1, 1, 1] [2022-01-18 15:48:36,496 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (155)] Ended with exit code 0 [2022-01-18 15:48:36,681 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable158,155 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:48:36,682 INFO L402 AbstractCegarLoop]: === Iteration 160 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-01-18 15:48:36,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:48:36,682 INFO L85 PathProgramCache]: Analyzing trace with hash 570334073, now seen corresponding path program 60 times [2022-01-18 15:48:36,682 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:48:36,682 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [699681931] [2022-01-18 15:48:36,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:48:36,682 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:48:36,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:48:36,854 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 15:48:36,854 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:48:36,854 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [699681931] [2022-01-18 15:48:36,854 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [699681931] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:48:36,854 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [511948068] [2022-01-18 15:48:36,854 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 15:48:36,854 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:48:36,855 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:48:36,855 INFO L229 MonitoredProcess]: Starting monitored process 156 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:48:36,856 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (156)] Waiting until timeout for monitored process [2022-01-18 15:48:36,885 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 15:48:36,885 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:48:36,886 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2022-01-18 15:48:36,886 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:48:37,174 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:48:37,194 INFO L353 Elim1Store]: treesize reduction 12, result has 76.5 percent of original size [2022-01-18 15:48:37,194 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 33 treesize of output 59 [2022-01-18 15:48:37,449 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 15:48:37,449 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:48:37,774 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 15:48:37,774 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [511948068] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:48:37,774 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:48:37,774 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 13] total 32 [2022-01-18 15:48:37,774 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1471995010] [2022-01-18 15:48:37,774 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:48:37,774 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-01-18 15:48:37,774 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:48:37,775 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-01-18 15:48:37,775 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=954, Unknown=0, NotChecked=0, Total=1056 [2022-01-18 15:48:37,775 INFO L87 Difference]: Start difference. First operand 9963 states and 44463 transitions. Second operand has 33 states, 33 states have (on average 2.393939393939394) internal successors, (79), 32 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:48:42,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:48:42,710 INFO L93 Difference]: Finished difference Result 14892 states and 64988 transitions. [2022-01-18 15:48:42,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2022-01-18 15:48:42,710 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.393939393939394) internal successors, (79), 32 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 15:48:42,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:48:42,750 INFO L225 Difference]: With dead ends: 14892 [2022-01-18 15:48:42,751 INFO L226 Difference]: Without dead ends: 14824 [2022-01-18 15:48:42,751 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 43 SyntacticMatches, 4 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2423 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=804, Invalid=8126, Unknown=0, NotChecked=0, Total=8930 [2022-01-18 15:48:42,752 INFO L933 BasicCegarLoop]: 87 mSDtfsCounter, 1077 mSDsluCounter, 4734 mSDsCounter, 0 mSdLazyCounter, 6071 mSolverCounterSat, 216 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1077 SdHoareTripleChecker+Valid, 1873 SdHoareTripleChecker+Invalid, 6287 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 216 IncrementalHoareTripleChecker+Valid, 6071 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2022-01-18 15:48:42,752 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1077 Valid, 1873 Invalid, 6287 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [216 Valid, 6071 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2022-01-18 15:48:42,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14824 states. [2022-01-18 15:48:43,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14824 to 11016. [2022-01-18 15:48:43,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11016 states, 11015 states have (on average 4.552156150703586) internal successors, (50142), 11015 states have internal predecessors, (50142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:48:43,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11016 states to 11016 states and 50142 transitions. [2022-01-18 15:48:43,050 INFO L78 Accepts]: Start accepts. Automaton has 11016 states and 50142 transitions. Word has length 33 [2022-01-18 15:48:43,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:48:43,050 INFO L470 AbstractCegarLoop]: Abstraction has 11016 states and 50142 transitions. [2022-01-18 15:48:43,051 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.393939393939394) internal successors, (79), 32 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:48:43,051 INFO L276 IsEmpty]: Start isEmpty. Operand 11016 states and 50142 transitions. [2022-01-18 15:48:43,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 15:48:43,071 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:48:43,071 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, 1, 1, 1, 1, 1] [2022-01-18 15:48:43,086 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (156)] Ended with exit code 0 [2022-01-18 15:48:43,271 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable159,156 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:48:43,272 INFO L402 AbstractCegarLoop]: === Iteration 161 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-01-18 15:48:43,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:48:43,272 INFO L85 PathProgramCache]: Analyzing trace with hash 326417503, now seen corresponding path program 61 times [2022-01-18 15:48:43,272 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:48:43,272 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1493308025] [2022-01-18 15:48:43,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:48:43,272 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:48:43,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:48:43,434 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 15:48:43,435 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:48:43,435 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1493308025] [2022-01-18 15:48:43,435 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1493308025] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:48:43,435 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1679803333] [2022-01-18 15:48:43,435 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 15:48:43,435 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:48:43,435 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:48:43,436 INFO L229 MonitoredProcess]: Starting monitored process 157 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:48:43,436 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (157)] Waiting until timeout for monitored process [2022-01-18 15:48:43,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:48:43,466 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2022-01-18 15:48:43,467 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:48:43,866 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:48:43,866 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 21 [2022-01-18 15:48:43,939 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 15:48:43,939 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:48:44,248 INFO L353 Elim1Store]: treesize reduction 36, result has 50.7 percent of original size [2022-01-18 15:48:44,248 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 27 treesize of output 48 [2022-01-18 15:48:44,312 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:48:44,312 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:48:44,313 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:48:44,313 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:48:44,314 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 27 treesize of output 7 [2022-01-18 15:48:44,358 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 15:48:44,359 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1679803333] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:48:44,359 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:48:44,359 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 32 [2022-01-18 15:48:44,359 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1577451712] [2022-01-18 15:48:44,359 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:48:44,359 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-01-18 15:48:44,359 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:48:44,359 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-01-18 15:48:44,360 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=969, Unknown=0, NotChecked=0, Total=1056 [2022-01-18 15:48:44,360 INFO L87 Difference]: Start difference. First operand 11016 states and 50142 transitions. Second operand has 33 states, 33 states have (on average 2.515151515151515) internal successors, (83), 32 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:48:46,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:48:46,484 INFO L93 Difference]: Finished difference Result 12046 states and 53910 transitions. [2022-01-18 15:48:46,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-01-18 15:48:46,484 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.515151515151515) internal successors, (83), 32 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 15:48:46,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:48:46,581 INFO L225 Difference]: With dead ends: 12046 [2022-01-18 15:48:46,582 INFO L226 Difference]: Without dead ends: 11981 [2022-01-18 15:48:46,582 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 43 SyntacticMatches, 4 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 498 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=249, Invalid=2721, Unknown=0, NotChecked=0, Total=2970 [2022-01-18 15:48:46,582 INFO L933 BasicCegarLoop]: 58 mSDtfsCounter, 433 mSDsluCounter, 2646 mSDsCounter, 0 mSdLazyCounter, 3567 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 433 SdHoareTripleChecker+Valid, 1070 SdHoareTripleChecker+Invalid, 3606 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 3567 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-01-18 15:48:46,582 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [433 Valid, 1070 Invalid, 3606 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 3567 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-01-18 15:48:46,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11981 states. [2022-01-18 15:48:46,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11981 to 11016. [2022-01-18 15:48:46,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11016 states, 11015 states have (on average 4.552156150703586) internal successors, (50142), 11015 states have internal predecessors, (50142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:48:46,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11016 states to 11016 states and 50142 transitions. [2022-01-18 15:48:46,854 INFO L78 Accepts]: Start accepts. Automaton has 11016 states and 50142 transitions. Word has length 33 [2022-01-18 15:48:46,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:48:46,854 INFO L470 AbstractCegarLoop]: Abstraction has 11016 states and 50142 transitions. [2022-01-18 15:48:46,854 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.515151515151515) internal successors, (83), 32 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:48:46,854 INFO L276 IsEmpty]: Start isEmpty. Operand 11016 states and 50142 transitions. [2022-01-18 15:48:46,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 15:48:46,876 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:48:46,876 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, 1, 1, 1, 1, 1] [2022-01-18 15:48:46,893 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (157)] Ended with exit code 0 [2022-01-18 15:48:47,077 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable160,157 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:48:47,077 INFO L402 AbstractCegarLoop]: === Iteration 162 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-01-18 15:48:47,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:48:47,077 INFO L85 PathProgramCache]: Analyzing trace with hash -1256626191, now seen corresponding path program 62 times [2022-01-18 15:48:47,077 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:48:47,077 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [151739106] [2022-01-18 15:48:47,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:48:47,077 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:48:47,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:48:47,256 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 15:48:47,256 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:48:47,256 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [151739106] [2022-01-18 15:48:47,256 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [151739106] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:48:47,256 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2064802058] [2022-01-18 15:48:47,256 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 15:48:47,256 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:48:47,257 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:48:47,257 INFO L229 MonitoredProcess]: Starting monitored process 158 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:48:47,258 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (158)] Waiting until timeout for monitored process [2022-01-18 15:48:47,287 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:48:47,288 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:48:47,288 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2022-01-18 15:48:47,289 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:48:47,625 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:48:47,625 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 3 new quantified variables, introduced 3 case distinctions, treesize of input 29 treesize of output 45 [2022-01-18 15:48:48,044 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 15:48:48,044 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:48:48,248 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:48:48,248 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 22 [2022-01-18 15:48:48,257 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:48:48,257 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 7 [2022-01-18 15:48:48,361 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 15:48:48,361 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2064802058] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:48:48,362 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:48:48,362 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 30 [2022-01-18 15:48:48,362 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1322374829] [2022-01-18 15:48:48,362 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:48:48,362 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-01-18 15:48:48,362 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:48:48,362 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-01-18 15:48:48,362 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=845, Unknown=0, NotChecked=0, Total=930 [2022-01-18 15:48:48,362 INFO L87 Difference]: Start difference. First operand 11016 states and 50142 transitions. Second operand has 31 states, 31 states have (on average 2.2580645161290325) internal successors, (70), 30 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 15:48:50,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:48:50,636 INFO L93 Difference]: Finished difference Result 12337 states and 55335 transitions. [2022-01-18 15:48:50,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-01-18 15:48:50,636 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.2580645161290325) internal successors, (70), 30 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 33 [2022-01-18 15:48:50,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:48:50,679 INFO L225 Difference]: With dead ends: 12337 [2022-01-18 15:48:50,679 INFO L226 Difference]: Without dead ends: 12319 [2022-01-18 15:48:50,680 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 45 SyntacticMatches, 8 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 640 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=307, Invalid=2555, Unknown=0, NotChecked=0, Total=2862 [2022-01-18 15:48:50,680 INFO L933 BasicCegarLoop]: 61 mSDtfsCounter, 486 mSDsluCounter, 2486 mSDsCounter, 0 mSdLazyCounter, 3141 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 486 SdHoareTripleChecker+Valid, 999 SdHoareTripleChecker+Invalid, 3429 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 3141 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 212 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-01-18 15:48:50,680 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [486 Valid, 999 Invalid, 3429 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 3141 Invalid, 0 Unknown, 212 Unchecked, 1.3s Time] [2022-01-18 15:48:50,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12319 states. [2022-01-18 15:48:50,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12319 to 11064. [2022-01-18 15:48:50,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11064 states, 11063 states have (on average 4.544969718882762) internal successors, (50281), 11063 states have internal predecessors, (50281), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:48:51,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11064 states to 11064 states and 50281 transitions. [2022-01-18 15:48:51,010 INFO L78 Accepts]: Start accepts. Automaton has 11064 states and 50281 transitions. Word has length 33 [2022-01-18 15:48:51,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:48:51,011 INFO L470 AbstractCegarLoop]: Abstraction has 11064 states and 50281 transitions. [2022-01-18 15:48:51,011 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.2580645161290325) internal successors, (70), 30 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 15:48:51,011 INFO L276 IsEmpty]: Start isEmpty. Operand 11064 states and 50281 transitions. [2022-01-18 15:48:51,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 15:48:51,034 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:48:51,034 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, 1, 1, 1, 1, 1] [2022-01-18 15:48:51,055 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (158)] Ended with exit code 0 [2022-01-18 15:48:51,235 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 158 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable161 [2022-01-18 15:48:51,235 INFO L402 AbstractCegarLoop]: === Iteration 163 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-01-18 15:48:51,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:48:51,235 INFO L85 PathProgramCache]: Analyzing trace with hash 1806628815, now seen corresponding path program 63 times [2022-01-18 15:48:51,235 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:48:51,235 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1811573234] [2022-01-18 15:48:51,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:48:51,235 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:48:51,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:48:51,412 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 15:48:51,412 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:48:51,412 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1811573234] [2022-01-18 15:48:51,412 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1811573234] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:48:51,412 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [878343879] [2022-01-18 15:48:51,412 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 15:48:51,412 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:48:51,412 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:48:51,413 INFO L229 MonitoredProcess]: Starting monitored process 159 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:48:51,414 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (159)] Waiting until timeout for monitored process [2022-01-18 15:48:51,445 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 15:48:51,445 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:48:51,446 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2022-01-18 15:48:51,447 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:48:51,824 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:48:51,846 INFO L353 Elim1Store]: treesize reduction 12, result has 76.5 percent of original size [2022-01-18 15:48:51,846 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 33 treesize of output 59 [2022-01-18 15:48:52,038 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 15:48:52,038 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:48:52,357 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 15:48:52,357 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [878343879] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:48:52,357 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:48:52,357 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 33 [2022-01-18 15:48:52,357 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [853301653] [2022-01-18 15:48:52,357 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:48:52,358 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-01-18 15:48:52,358 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:48:52,358 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-01-18 15:48:52,358 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=1023, Unknown=0, NotChecked=0, Total=1122 [2022-01-18 15:48:52,358 INFO L87 Difference]: Start difference. First operand 11064 states and 50281 transitions. Second operand has 34 states, 34 states have (on average 2.411764705882353) internal successors, (82), 33 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:48:56,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:48:56,109 INFO L93 Difference]: Finished difference Result 13285 states and 58444 transitions. [2022-01-18 15:48:56,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2022-01-18 15:48:56,109 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.411764705882353) internal successors, (82), 33 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 15:48:56,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:48:56,147 INFO L225 Difference]: With dead ends: 13285 [2022-01-18 15:48:56,148 INFO L226 Difference]: Without dead ends: 13211 [2022-01-18 15:48:56,148 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 43 SyntacticMatches, 3 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1411 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=544, Invalid=5776, Unknown=0, NotChecked=0, Total=6320 [2022-01-18 15:48:56,148 INFO L933 BasicCegarLoop]: 75 mSDtfsCounter, 850 mSDsluCounter, 4043 mSDsCounter, 0 mSdLazyCounter, 5116 mSolverCounterSat, 150 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 850 SdHoareTripleChecker+Valid, 1669 SdHoareTripleChecker+Invalid, 5266 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 150 IncrementalHoareTripleChecker+Valid, 5116 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:48:56,148 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [850 Valid, 1669 Invalid, 5266 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [150 Valid, 5116 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2022-01-18 15:48:56,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13211 states. [2022-01-18 15:48:56,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13211 to 11058. [2022-01-18 15:48:56,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11058 states, 11057 states have (on average 4.553585963642941) internal successors, (50349), 11057 states have internal predecessors, (50349), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:48:56,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11058 states to 11058 states and 50349 transitions. [2022-01-18 15:48:56,451 INFO L78 Accepts]: Start accepts. Automaton has 11058 states and 50349 transitions. Word has length 33 [2022-01-18 15:48:56,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:48:56,451 INFO L470 AbstractCegarLoop]: Abstraction has 11058 states and 50349 transitions. [2022-01-18 15:48:56,451 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 2.411764705882353) internal successors, (82), 33 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:48:56,451 INFO L276 IsEmpty]: Start isEmpty. Operand 11058 states and 50349 transitions. [2022-01-18 15:48:56,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 15:48:56,471 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:48:56,471 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, 1, 1, 1, 1, 1] [2022-01-18 15:48:56,486 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (159)] Ended with exit code 0 [2022-01-18 15:48:56,671 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable162,159 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:48:56,672 INFO L402 AbstractCegarLoop]: === Iteration 164 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-01-18 15:48:56,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:48:56,672 INFO L85 PathProgramCache]: Analyzing trace with hash -1813873799, now seen corresponding path program 64 times [2022-01-18 15:48:56,672 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:48:56,672 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1212188681] [2022-01-18 15:48:56,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:48:56,672 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:48:56,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:48:56,855 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 15:48:56,855 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:48:56,855 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1212188681] [2022-01-18 15:48:56,855 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1212188681] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:48:56,855 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1806180783] [2022-01-18 15:48:56,855 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 15:48:56,855 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:48:56,855 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:48:56,856 INFO L229 MonitoredProcess]: Starting monitored process 160 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:48:56,857 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (160)] Waiting until timeout for monitored process [2022-01-18 15:48:56,887 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 15:48:56,887 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:48:56,888 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2022-01-18 15:48:56,888 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:48:57,295 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:48:57,296 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 21 [2022-01-18 15:48:57,381 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 15:48:57,381 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:48:57,696 INFO L353 Elim1Store]: treesize reduction 36, result has 50.7 percent of original size [2022-01-18 15:48:57,696 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 27 treesize of output 48 [2022-01-18 15:48:57,766 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:48:57,766 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:48:57,766 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:48:57,767 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:48:57,767 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 27 treesize of output 7 [2022-01-18 15:48:57,811 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 15:48:57,812 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1806180783] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:48:57,812 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:48:57,812 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 32 [2022-01-18 15:48:57,812 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [242894022] [2022-01-18 15:48:57,812 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:48:57,812 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-01-18 15:48:57,812 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:48:57,812 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-01-18 15:48:57,812 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=975, Unknown=0, NotChecked=0, Total=1056 [2022-01-18 15:48:57,813 INFO L87 Difference]: Start difference. First operand 11058 states and 50349 transitions. Second operand has 33 states, 33 states have (on average 2.515151515151515) internal successors, (83), 32 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:48:59,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:48:59,306 INFO L93 Difference]: Finished difference Result 11637 states and 52576 transitions. [2022-01-18 15:48:59,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-01-18 15:48:59,306 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.515151515151515) internal successors, (83), 32 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 15:48:59,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:48:59,414 INFO L225 Difference]: With dead ends: 11637 [2022-01-18 15:48:59,414 INFO L226 Difference]: Without dead ends: 11626 [2022-01-18 15:48:59,414 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 43 SyntacticMatches, 4 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 295 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=177, Invalid=1985, Unknown=0, NotChecked=0, Total=2162 [2022-01-18 15:48:59,415 INFO L933 BasicCegarLoop]: 51 mSDtfsCounter, 326 mSDsluCounter, 2090 mSDsCounter, 0 mSdLazyCounter, 2684 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 326 SdHoareTripleChecker+Valid, 863 SdHoareTripleChecker+Invalid, 2735 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 2684 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 25 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-01-18 15:48:59,415 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [326 Valid, 863 Invalid, 2735 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 2684 Invalid, 0 Unknown, 25 Unchecked, 1.0s Time] [2022-01-18 15:48:59,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11626 states. [2022-01-18 15:48:59,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11626 to 11149. [2022-01-18 15:48:59,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11149 states, 11148 states have (on average 4.540545389307499) internal successors, (50618), 11148 states have internal predecessors, (50618), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:48:59,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11149 states to 11149 states and 50618 transitions. [2022-01-18 15:48:59,618 INFO L78 Accepts]: Start accepts. Automaton has 11149 states and 50618 transitions. Word has length 33 [2022-01-18 15:48:59,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:48:59,618 INFO L470 AbstractCegarLoop]: Abstraction has 11149 states and 50618 transitions. [2022-01-18 15:48:59,618 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.515151515151515) internal successors, (83), 32 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:48:59,618 INFO L276 IsEmpty]: Start isEmpty. Operand 11149 states and 50618 transitions. [2022-01-18 15:48:59,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 15:48:59,639 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:48:59,639 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, 1, 1, 1, 1, 1] [2022-01-18 15:48:59,655 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (160)] Forceful destruction successful, exit code 0 [2022-01-18 15:48:59,839 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable163,160 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:48:59,839 INFO L402 AbstractCegarLoop]: === Iteration 165 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-01-18 15:48:59,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:48:59,840 INFO L85 PathProgramCache]: Analyzing trace with hash -926370118, now seen corresponding path program 6 times [2022-01-18 15:48:59,840 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:48:59,840 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1805034504] [2022-01-18 15:48:59,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:48:59,840 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:48:59,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:49:00,004 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 15:49:00,004 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:49:00,004 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1805034504] [2022-01-18 15:49:00,004 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1805034504] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:49:00,004 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1978750576] [2022-01-18 15:49:00,004 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 15:49:00,004 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:49:00,004 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:49:00,005 INFO L229 MonitoredProcess]: Starting monitored process 161 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:49:00,006 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (161)] Waiting until timeout for monitored process [2022-01-18 15:49:00,036 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 15:49:00,036 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:49:00,036 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2022-01-18 15:49:00,037 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:49:00,440 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:49:00,459 INFO L353 Elim1Store]: treesize reduction 12, result has 76.5 percent of original size [2022-01-18 15:49:00,460 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 31 treesize of output 57 [2022-01-18 15:49:00,594 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 15:49:00,594 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:49:01,007 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 15:49:01,008 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1978750576] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:49:01,008 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:49:01,008 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 35 [2022-01-18 15:49:01,008 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [907605580] [2022-01-18 15:49:01,008 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:49:01,008 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-01-18 15:49:01,008 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:49:01,008 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-01-18 15:49:01,008 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=1156, Unknown=0, NotChecked=0, Total=1260 [2022-01-18 15:49:01,008 INFO L87 Difference]: Start difference. First operand 11149 states and 50618 transitions. Second operand has 36 states, 36 states have (on average 2.361111111111111) internal successors, (85), 35 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:49:06,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:49:06,113 INFO L93 Difference]: Finished difference Result 14471 states and 63309 transitions. [2022-01-18 15:49:06,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2022-01-18 15:49:06,113 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.361111111111111) internal successors, (85), 35 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 15:49:06,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:49:06,212 INFO L225 Difference]: With dead ends: 14471 [2022-01-18 15:49:06,213 INFO L226 Difference]: Without dead ends: 14376 [2022-01-18 15:49:06,213 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 41 SyntacticMatches, 3 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2148 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=755, Invalid=8557, Unknown=0, NotChecked=0, Total=9312 [2022-01-18 15:49:06,213 INFO L933 BasicCegarLoop]: 57 mSDtfsCounter, 1022 mSDsluCounter, 3921 mSDsCounter, 0 mSdLazyCounter, 5062 mSolverCounterSat, 206 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1022 SdHoareTripleChecker+Valid, 1473 SdHoareTripleChecker+Invalid, 5268 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 206 IncrementalHoareTripleChecker+Valid, 5062 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:49:06,213 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1022 Valid, 1473 Invalid, 5268 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [206 Valid, 5062 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2022-01-18 15:49:06,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14376 states. [2022-01-18 15:49:06,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14376 to 11127. [2022-01-18 15:49:06,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11127 states, 11126 states have (on average 4.554287255078195) internal successors, (50671), 11126 states have internal predecessors, (50671), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:49:06,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11127 states to 11127 states and 50671 transitions. [2022-01-18 15:49:06,440 INFO L78 Accepts]: Start accepts. Automaton has 11127 states and 50671 transitions. Word has length 33 [2022-01-18 15:49:06,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:49:06,441 INFO L470 AbstractCegarLoop]: Abstraction has 11127 states and 50671 transitions. [2022-01-18 15:49:06,441 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 2.361111111111111) internal successors, (85), 35 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:49:06,441 INFO L276 IsEmpty]: Start isEmpty. Operand 11127 states and 50671 transitions. [2022-01-18 15:49:06,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 15:49:06,462 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:49:06,462 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, 1, 1, 1, 1, 1] [2022-01-18 15:49:06,478 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (161)] Ended with exit code 0 [2022-01-18 15:49:06,663 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable164,161 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:49:06,664 INFO L402 AbstractCegarLoop]: === Iteration 166 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-01-18 15:49:06,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:49:06,664 INFO L85 PathProgramCache]: Analyzing trace with hash 446804635, now seen corresponding path program 65 times [2022-01-18 15:49:06,664 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:49:06,664 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [996685066] [2022-01-18 15:49:06,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:49:06,664 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:49:06,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:49:06,829 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 15:49:06,829 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:49:06,829 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [996685066] [2022-01-18 15:49:06,829 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [996685066] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:49:06,830 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1713302633] [2022-01-18 15:49:06,830 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 15:49:06,830 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:49:06,830 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:49:06,830 INFO L229 MonitoredProcess]: Starting monitored process 162 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:49:06,831 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (162)] Waiting until timeout for monitored process [2022-01-18 15:49:06,860 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 15:49:06,861 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:49:06,861 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2022-01-18 15:49:06,862 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:49:07,206 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:49:07,206 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 37 treesize of output 21 [2022-01-18 15:49:07,307 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 15:49:07,307 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:49:07,589 INFO L353 Elim1Store]: treesize reduction 36, result has 50.7 percent of original size [2022-01-18 15:49:07,589 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 27 treesize of output 48 [2022-01-18 15:49:07,644 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:49:07,645 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:49:07,645 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:49:07,645 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:49:07,646 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 27 treesize of output 7 [2022-01-18 15:49:07,689 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 15:49:07,689 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1713302633] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:49:07,689 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:49:07,689 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 32 [2022-01-18 15:49:07,689 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [703793754] [2022-01-18 15:49:07,689 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:49:07,689 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-01-18 15:49:07,689 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:49:07,690 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-01-18 15:49:07,690 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=964, Unknown=0, NotChecked=0, Total=1056 [2022-01-18 15:49:07,690 INFO L87 Difference]: Start difference. First operand 11127 states and 50671 transitions. Second operand has 33 states, 33 states have (on average 2.515151515151515) internal successors, (83), 32 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:49:09,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:49:09,946 INFO L93 Difference]: Finished difference Result 12144 states and 54457 transitions. [2022-01-18 15:49:09,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-01-18 15:49:09,947 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.515151515151515) internal successors, (83), 32 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 15:49:09,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:49:09,981 INFO L225 Difference]: With dead ends: 12144 [2022-01-18 15:49:09,981 INFO L226 Difference]: Without dead ends: 12133 [2022-01-18 15:49:09,981 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 43 SyntacticMatches, 4 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 558 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=263, Invalid=2707, Unknown=0, NotChecked=0, Total=2970 [2022-01-18 15:49:09,982 INFO L933 BasicCegarLoop]: 69 mSDtfsCounter, 401 mSDsluCounter, 3348 mSDsCounter, 0 mSdLazyCounter, 4260 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 401 SdHoareTripleChecker+Valid, 1373 SdHoareTripleChecker+Invalid, 4551 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 4260 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 240 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-01-18 15:49:09,982 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [401 Valid, 1373 Invalid, 4551 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 4260 Invalid, 0 Unknown, 240 Unchecked, 1.5s Time] [2022-01-18 15:49:09,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12133 states. [2022-01-18 15:49:10,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12133 to 11201. [2022-01-18 15:49:10,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11201 states, 11200 states have (on average 4.5441071428571425) internal successors, (50894), 11200 states have internal predecessors, (50894), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:49:10,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11201 states to 11201 states and 50894 transitions. [2022-01-18 15:49:10,323 INFO L78 Accepts]: Start accepts. Automaton has 11201 states and 50894 transitions. Word has length 33 [2022-01-18 15:49:10,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:49:10,323 INFO L470 AbstractCegarLoop]: Abstraction has 11201 states and 50894 transitions. [2022-01-18 15:49:10,323 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.515151515151515) internal successors, (83), 32 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:49:10,323 INFO L276 IsEmpty]: Start isEmpty. Operand 11201 states and 50894 transitions. [2022-01-18 15:49:10,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 15:49:10,343 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:49:10,343 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, 1, 1, 1, 1, 1] [2022-01-18 15:49:10,359 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (162)] Ended with exit code 0 [2022-01-18 15:49:10,544 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable165,162 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:49:10,544 INFO L402 AbstractCegarLoop]: === Iteration 167 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-01-18 15:49:10,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:49:10,544 INFO L85 PathProgramCache]: Analyzing trace with hash -1671487815, now seen corresponding path program 66 times [2022-01-18 15:49:10,544 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:49:10,544 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [379463146] [2022-01-18 15:49:10,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:49:10,545 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:49:10,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:49:10,737 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 15:49:10,738 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:49:10,738 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [379463146] [2022-01-18 15:49:10,738 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [379463146] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:49:10,738 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [348160537] [2022-01-18 15:49:10,738 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 15:49:10,738 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:49:10,738 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:49:10,739 INFO L229 MonitoredProcess]: Starting monitored process 163 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:49:10,740 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (163)] Waiting until timeout for monitored process [2022-01-18 15:49:10,770 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 15:49:10,771 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:49:10,771 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2022-01-18 15:49:10,772 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:49:11,136 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:49:11,156 INFO L353 Elim1Store]: treesize reduction 12, result has 76.5 percent of original size [2022-01-18 15:49:11,156 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 33 treesize of output 59 [2022-01-18 15:49:11,338 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 15:49:11,338 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:49:11,708 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 15:49:11,708 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [348160537] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:49:11,708 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:49:11,708 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 34 [2022-01-18 15:49:11,708 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [294389389] [2022-01-18 15:49:11,708 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:49:11,708 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-01-18 15:49:11,708 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:49:11,709 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-01-18 15:49:11,709 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=1086, Unknown=0, NotChecked=0, Total=1190 [2022-01-18 15:49:11,709 INFO L87 Difference]: Start difference. First operand 11201 states and 50894 transitions. Second operand has 35 states, 35 states have (on average 2.3142857142857145) internal successors, (81), 34 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:49:16,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:49:16,088 INFO L93 Difference]: Finished difference Result 13953 states and 60809 transitions. [2022-01-18 15:49:16,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2022-01-18 15:49:16,089 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.3142857142857145) internal successors, (81), 34 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 15:49:16,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:49:16,126 INFO L225 Difference]: With dead ends: 13953 [2022-01-18 15:49:16,126 INFO L226 Difference]: Without dead ends: 13892 [2022-01-18 15:49:16,127 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 42 SyntacticMatches, 3 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1773 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=675, Invalid=7157, Unknown=0, NotChecked=0, Total=7832 [2022-01-18 15:49:16,127 INFO L933 BasicCegarLoop]: 64 mSDtfsCounter, 1012 mSDsluCounter, 3542 mSDsCounter, 0 mSdLazyCounter, 4531 mSolverCounterSat, 196 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1012 SdHoareTripleChecker+Valid, 1388 SdHoareTripleChecker+Invalid, 4727 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 196 IncrementalHoareTripleChecker+Valid, 4531 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-01-18 15:49:16,127 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1012 Valid, 1388 Invalid, 4727 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [196 Valid, 4531 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-01-18 15:49:16,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13892 states. [2022-01-18 15:49:16,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13892 to 11145. [2022-01-18 15:49:16,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11145 states, 11144 states have (on average 4.552045944005743) internal successors, (50728), 11144 states have internal predecessors, (50728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:49:16,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11145 states to 11145 states and 50728 transitions. [2022-01-18 15:49:16,375 INFO L78 Accepts]: Start accepts. Automaton has 11145 states and 50728 transitions. Word has length 33 [2022-01-18 15:49:16,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:49:16,375 INFO L470 AbstractCegarLoop]: Abstraction has 11145 states and 50728 transitions. [2022-01-18 15:49:16,375 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.3142857142857145) internal successors, (81), 34 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:49:16,376 INFO L276 IsEmpty]: Start isEmpty. Operand 11145 states and 50728 transitions. [2022-01-18 15:49:16,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 15:49:16,396 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:49:16,396 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, 1, 1, 1, 1, 1] [2022-01-18 15:49:16,412 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (163)] Ended with exit code 0 [2022-01-18 15:49:16,597 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 163 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable166 [2022-01-18 15:49:16,598 INFO L402 AbstractCegarLoop]: === Iteration 168 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-01-18 15:49:16,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:49:16,598 INFO L85 PathProgramCache]: Analyzing trace with hash -523288529, now seen corresponding path program 67 times [2022-01-18 15:49:16,598 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:49:16,598 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [998678600] [2022-01-18 15:49:16,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:49:16,598 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:49:16,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:49:16,774 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 15:49:16,774 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:49:16,774 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [998678600] [2022-01-18 15:49:16,774 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [998678600] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:49:16,774 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1992786187] [2022-01-18 15:49:16,775 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 15:49:16,775 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:49:16,775 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:49:16,776 INFO L229 MonitoredProcess]: Starting monitored process 164 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:49:16,776 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (164)] Waiting until timeout for monitored process [2022-01-18 15:49:16,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:49:16,810 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2022-01-18 15:49:16,811 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:49:17,136 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:49:17,137 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 21 [2022-01-18 15:49:17,254 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 15:49:17,254 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:49:17,521 INFO L353 Elim1Store]: treesize reduction 36, result has 50.7 percent of original size [2022-01-18 15:49:17,521 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 27 treesize of output 48 [2022-01-18 15:49:17,581 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:49:17,582 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:49:17,582 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:49:17,583 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:49:17,583 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 27 treesize of output 7 [2022-01-18 15:49:17,631 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 15:49:17,631 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1992786187] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:49:17,631 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:49:17,631 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 31 [2022-01-18 15:49:17,631 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1816140531] [2022-01-18 15:49:17,631 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:49:17,631 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-01-18 15:49:17,631 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:49:17,631 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-01-18 15:49:17,632 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=873, Unknown=0, NotChecked=0, Total=992 [2022-01-18 15:49:17,632 INFO L87 Difference]: Start difference. First operand 11145 states and 50728 transitions. Second operand has 32 states, 32 states have (on average 2.59375) internal successors, (83), 31 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:49:20,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:49:20,203 INFO L93 Difference]: Finished difference Result 14490 states and 64069 transitions. [2022-01-18 15:49:20,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-01-18 15:49:20,204 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.59375) internal successors, (83), 31 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 15:49:20,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:49:20,251 INFO L225 Difference]: With dead ends: 14490 [2022-01-18 15:49:20,252 INFO L226 Difference]: Without dead ends: 14399 [2022-01-18 15:49:20,252 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 51 SyntacticMatches, 4 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1353 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=517, Invalid=4313, Unknown=0, NotChecked=0, Total=4830 [2022-01-18 15:49:20,252 INFO L933 BasicCegarLoop]: 88 mSDtfsCounter, 701 mSDsluCounter, 3959 mSDsCounter, 0 mSdLazyCounter, 4371 mSolverCounterSat, 113 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 701 SdHoareTripleChecker+Valid, 1604 SdHoareTripleChecker+Invalid, 5277 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 113 IncrementalHoareTripleChecker+Valid, 4371 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 793 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-01-18 15:49:20,253 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [701 Valid, 1604 Invalid, 5277 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [113 Valid, 4371 Invalid, 0 Unknown, 793 Unchecked, 1.7s Time] [2022-01-18 15:49:20,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14399 states. [2022-01-18 15:49:20,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14399 to 11502. [2022-01-18 15:49:20,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11502 states, 11501 states have (on average 4.563777062864099) internal successors, (52488), 11501 states have internal predecessors, (52488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:49:20,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11502 states to 11502 states and 52488 transitions. [2022-01-18 15:49:20,633 INFO L78 Accepts]: Start accepts. Automaton has 11502 states and 52488 transitions. Word has length 33 [2022-01-18 15:49:20,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:49:20,634 INFO L470 AbstractCegarLoop]: Abstraction has 11502 states and 52488 transitions. [2022-01-18 15:49:20,634 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.59375) internal successors, (83), 31 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:49:20,634 INFO L276 IsEmpty]: Start isEmpty. Operand 11502 states and 52488 transitions. [2022-01-18 15:49:20,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 15:49:20,657 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:49:20,657 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, 1, 1, 1, 1, 1] [2022-01-18 15:49:20,677 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (164)] Ended with exit code 0 [2022-01-18 15:49:20,857 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable167,164 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:49:20,857 INFO L402 AbstractCegarLoop]: === Iteration 169 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-01-18 15:49:20,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:49:20,858 INFO L85 PathProgramCache]: Analyzing trace with hash 779984077, now seen corresponding path program 68 times [2022-01-18 15:49:20,858 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:49:20,858 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [270574614] [2022-01-18 15:49:20,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:49:20,858 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:49:20,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:49:21,031 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 15:49:21,031 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:49:21,031 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [270574614] [2022-01-18 15:49:21,031 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [270574614] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:49:21,031 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1045211268] [2022-01-18 15:49:21,032 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 15:49:21,032 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:49:21,032 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:49:21,032 INFO L229 MonitoredProcess]: Starting monitored process 165 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:49:21,033 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (165)] Waiting until timeout for monitored process [2022-01-18 15:49:21,063 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:49:21,063 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:49:21,063 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2022-01-18 15:49:21,064 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:49:21,366 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:49:21,366 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 3 new quantified variables, introduced 3 case distinctions, treesize of input 31 treesize of output 47 [2022-01-18 15:49:22,047 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 15:49:22,047 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:49:22,224 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:49:22,224 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 22 [2022-01-18 15:49:22,233 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:49:22,233 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 7 [2022-01-18 15:49:22,278 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 15:49:22,278 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1045211268] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:49:22,278 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:49:22,278 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14, 13] total 28 [2022-01-18 15:49:22,278 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1493972983] [2022-01-18 15:49:22,278 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:49:22,278 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-01-18 15:49:22,278 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:49:22,278 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-01-18 15:49:22,279 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=704, Unknown=1, NotChecked=0, Total=812 [2022-01-18 15:49:22,279 INFO L87 Difference]: Start difference. First operand 11502 states and 52488 transitions. Second operand has 29 states, 29 states have (on average 2.3793103448275863) 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 15:49:23,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:49:23,831 INFO L93 Difference]: Finished difference Result 12534 states and 56539 transitions. [2022-01-18 15:49:23,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-01-18 15:49:23,831 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.3793103448275863) 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 33 [2022-01-18 15:49:23,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:49:23,866 INFO L225 Difference]: With dead ends: 12534 [2022-01-18 15:49:23,866 INFO L226 Difference]: Without dead ends: 12523 [2022-01-18 15:49:23,867 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 48 SyntacticMatches, 4 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 510 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=262, Invalid=1807, Unknown=1, NotChecked=0, Total=2070 [2022-01-18 15:49:23,867 INFO L933 BasicCegarLoop]: 68 mSDtfsCounter, 519 mSDsluCounter, 2563 mSDsCounter, 0 mSdLazyCounter, 2807 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 519 SdHoareTripleChecker+Valid, 1065 SdHoareTripleChecker+Invalid, 3568 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 2807 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 701 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-01-18 15:49:23,867 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [519 Valid, 1065 Invalid, 3568 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 2807 Invalid, 0 Unknown, 701 Unchecked, 1.0s Time] [2022-01-18 15:49:23,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12523 states. [2022-01-18 15:49:24,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12523 to 11538. [2022-01-18 15:49:24,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11538 states, 11537 states have (on average 4.5602843026783395) internal successors, (52612), 11537 states have internal predecessors, (52612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:49:24,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11538 states to 11538 states and 52612 transitions. [2022-01-18 15:49:24,096 INFO L78 Accepts]: Start accepts. Automaton has 11538 states and 52612 transitions. Word has length 33 [2022-01-18 15:49:24,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:49:24,096 INFO L470 AbstractCegarLoop]: Abstraction has 11538 states and 52612 transitions. [2022-01-18 15:49:24,096 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.3793103448275863) 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 15:49:24,096 INFO L276 IsEmpty]: Start isEmpty. Operand 11538 states and 52612 transitions. [2022-01-18 15:49:24,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 15:49:24,119 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:49:24,119 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, 1, 1, 1, 1, 1] [2022-01-18 15:49:24,134 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (165)] Forceful destruction successful, exit code 0 [2022-01-18 15:49:24,319 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 165 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable168 [2022-01-18 15:49:24,320 INFO L402 AbstractCegarLoop]: === Iteration 170 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-01-18 15:49:24,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:49:24,320 INFO L85 PathProgramCache]: Analyzing trace with hash 583470572, now seen corresponding path program 7 times [2022-01-18 15:49:24,320 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:49:24,320 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [183019878] [2022-01-18 15:49:24,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:49:24,320 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:49:24,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:49:24,478 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 15:49:24,478 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:49:24,478 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [183019878] [2022-01-18 15:49:24,478 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [183019878] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:49:24,478 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1774217972] [2022-01-18 15:49:24,478 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 15:49:24,478 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:49:24,478 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:49:24,479 INFO L229 MonitoredProcess]: Starting monitored process 166 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:49:24,479 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (166)] Waiting until timeout for monitored process [2022-01-18 15:49:24,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:49:24,510 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2022-01-18 15:49:24,511 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:49:24,824 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:49:24,824 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 17 [2022-01-18 15:49:24,931 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 15:49:24,931 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:49:25,190 INFO L353 Elim1Store]: treesize reduction 36, result has 50.7 percent of original size [2022-01-18 15:49:25,190 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 27 treesize of output 48 [2022-01-18 15:49:25,248 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:49:25,249 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:49:25,249 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:49:25,250 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:49:25,250 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 7 [2022-01-18 15:49:25,296 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 15:49:25,296 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1774217972] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:49:25,296 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:49:25,296 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 30 [2022-01-18 15:49:25,296 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1469266616] [2022-01-18 15:49:25,296 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:49:25,296 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-01-18 15:49:25,296 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:49:25,297 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-01-18 15:49:25,297 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=815, Unknown=0, NotChecked=0, Total=930 [2022-01-18 15:49:25,297 INFO L87 Difference]: Start difference. First operand 11538 states and 52612 transitions. Second operand has 31 states, 31 states have (on average 2.5483870967741935) internal successors, (79), 30 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:49:27,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:49:27,737 INFO L93 Difference]: Finished difference Result 14425 states and 63648 transitions. [2022-01-18 15:49:27,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-01-18 15:49:27,738 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.5483870967741935) internal successors, (79), 30 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 15:49:27,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:49:27,859 INFO L225 Difference]: With dead ends: 14425 [2022-01-18 15:49:27,859 INFO L226 Difference]: Without dead ends: 14274 [2022-01-18 15:49:27,859 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 45 SyntacticMatches, 4 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1099 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=450, Invalid=3582, Unknown=0, NotChecked=0, Total=4032 [2022-01-18 15:49:27,859 INFO L933 BasicCegarLoop]: 84 mSDtfsCounter, 756 mSDsluCounter, 3232 mSDsCounter, 0 mSdLazyCounter, 4186 mSolverCounterSat, 99 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 756 SdHoareTripleChecker+Valid, 1349 SdHoareTripleChecker+Invalid, 4285 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 99 IncrementalHoareTripleChecker+Valid, 4186 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-01-18 15:49:27,859 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [756 Valid, 1349 Invalid, 4285 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [99 Valid, 4186 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-01-18 15:49:27,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14274 states. [2022-01-18 15:49:28,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14274 to 11508. [2022-01-18 15:49:28,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11508 states, 11507 states have (on average 4.561745024767533) internal successors, (52492), 11507 states have internal predecessors, (52492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:49:28,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11508 states to 11508 states and 52492 transitions. [2022-01-18 15:49:28,102 INFO L78 Accepts]: Start accepts. Automaton has 11508 states and 52492 transitions. Word has length 33 [2022-01-18 15:49:28,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:49:28,102 INFO L470 AbstractCegarLoop]: Abstraction has 11508 states and 52492 transitions. [2022-01-18 15:49:28,102 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.5483870967741935) internal successors, (79), 30 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:49:28,102 INFO L276 IsEmpty]: Start isEmpty. Operand 11508 states and 52492 transitions. [2022-01-18 15:49:28,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 15:49:28,123 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:49:28,123 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, 1, 1, 1, 1, 1] [2022-01-18 15:49:28,139 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (166)] Forceful destruction successful, exit code 0 [2022-01-18 15:49:28,324 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 166 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable169 [2022-01-18 15:49:28,324 INFO L402 AbstractCegarLoop]: === Iteration 171 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-01-18 15:49:28,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:49:28,325 INFO L85 PathProgramCache]: Analyzing trace with hash -1505540643, now seen corresponding path program 69 times [2022-01-18 15:49:28,325 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:49:28,325 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [37648218] [2022-01-18 15:49:28,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:49:28,325 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:49:28,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:49:28,501 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 15:49:28,502 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:49:28,502 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [37648218] [2022-01-18 15:49:28,502 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [37648218] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:49:28,502 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [268263698] [2022-01-18 15:49:28,502 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 15:49:28,502 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:49:28,502 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:49:28,503 INFO L229 MonitoredProcess]: Starting monitored process 167 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:49:28,503 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (167)] Waiting until timeout for monitored process [2022-01-18 15:49:28,533 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-01-18 15:49:28,533 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:49:28,534 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 43 conjunts are in the unsatisfiable core [2022-01-18 15:49:28,535 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:49:28,830 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:49:28,849 INFO L353 Elim1Store]: treesize reduction 14, result has 72.5 percent of original size [2022-01-18 15:49:28,849 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 31 treesize of output 55 [2022-01-18 15:49:29,070 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 15:49:29,070 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:49:29,361 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 15:49:29,362 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [268263698] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:49:29,362 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:49:29,362 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 32 [2022-01-18 15:49:29,362 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [862909552] [2022-01-18 15:49:29,362 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:49:29,362 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-01-18 15:49:29,362 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:49:29,362 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-01-18 15:49:29,362 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=951, Unknown=0, NotChecked=0, Total=1056 [2022-01-18 15:49:29,362 INFO L87 Difference]: Start difference. First operand 11508 states and 52492 transitions. Second operand has 33 states, 33 states have (on average 2.393939393939394) internal successors, (79), 32 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:49:34,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:49:34,119 INFO L93 Difference]: Finished difference Result 15526 states and 68442 transitions. [2022-01-18 15:49:34,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2022-01-18 15:49:34,120 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.393939393939394) internal successors, (79), 32 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 15:49:34,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:49:34,161 INFO L225 Difference]: With dead ends: 15526 [2022-01-18 15:49:34,161 INFO L226 Difference]: Without dead ends: 15462 [2022-01-18 15:49:34,163 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 44 SyntacticMatches, 3 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2848 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=809, Invalid=9091, Unknown=0, NotChecked=0, Total=9900 [2022-01-18 15:49:34,163 INFO L933 BasicCegarLoop]: 106 mSDtfsCounter, 1141 mSDsluCounter, 5019 mSDsCounter, 0 mSdLazyCounter, 6419 mSolverCounterSat, 228 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1141 SdHoareTripleChecker+Valid, 2129 SdHoareTripleChecker+Invalid, 6647 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 228 IncrementalHoareTripleChecker+Valid, 6419 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2022-01-18 15:49:34,163 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1141 Valid, 2129 Invalid, 6647 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [228 Valid, 6419 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2022-01-18 15:49:34,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15462 states. [2022-01-18 15:49:34,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15462 to 11922. [2022-01-18 15:49:34,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11922 states, 11921 states have (on average 4.589212314403154) internal successors, (54708), 11921 states have internal predecessors, (54708), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:49:34,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11922 states to 11922 states and 54708 transitions. [2022-01-18 15:49:34,422 INFO L78 Accepts]: Start accepts. Automaton has 11922 states and 54708 transitions. Word has length 33 [2022-01-18 15:49:34,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:49:34,422 INFO L470 AbstractCegarLoop]: Abstraction has 11922 states and 54708 transitions. [2022-01-18 15:49:34,422 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.393939393939394) internal successors, (79), 32 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:49:34,422 INFO L276 IsEmpty]: Start isEmpty. Operand 11922 states and 54708 transitions. [2022-01-18 15:49:34,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 15:49:34,444 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:49:34,444 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, 1, 1, 1, 1, 1] [2022-01-18 15:49:34,461 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (167)] Forceful destruction successful, exit code 0 [2022-01-18 15:49:34,644 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable170,167 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:49:34,645 INFO L402 AbstractCegarLoop]: === Iteration 172 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-01-18 15:49:34,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:49:34,645 INFO L85 PathProgramCache]: Analyzing trace with hash 569915123, now seen corresponding path program 70 times [2022-01-18 15:49:34,645 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:49:34,645 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1441072175] [2022-01-18 15:49:34,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:49:34,645 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:49:34,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:49:34,811 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 15:49:34,811 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:49:34,811 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1441072175] [2022-01-18 15:49:34,811 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1441072175] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:49:34,811 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [140284868] [2022-01-18 15:49:34,811 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 15:49:34,811 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:49:34,812 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:49:34,812 INFO L229 MonitoredProcess]: Starting monitored process 168 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:49:34,813 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (168)] Waiting until timeout for monitored process [2022-01-18 15:49:34,841 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 15:49:34,842 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:49:34,842 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2022-01-18 15:49:34,843 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:49:35,283 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:49:35,283 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 33 treesize of output 17 [2022-01-18 15:49:35,354 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 15:49:35,355 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:49:35,652 INFO L353 Elim1Store]: treesize reduction 36, result has 50.7 percent of original size [2022-01-18 15:49:35,652 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 27 treesize of output 48 [2022-01-18 15:49:35,710 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:49:35,711 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:49:35,711 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:49:35,712 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:49:35,712 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 27 treesize of output 7 [2022-01-18 15:49:35,757 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 15:49:35,757 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [140284868] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:49:35,757 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:49:35,757 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 32 [2022-01-18 15:49:35,757 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2082917648] [2022-01-18 15:49:35,757 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:49:35,757 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-01-18 15:49:35,757 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:49:35,757 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-01-18 15:49:35,758 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=964, Unknown=0, NotChecked=0, Total=1056 [2022-01-18 15:49:35,758 INFO L87 Difference]: Start difference. First operand 11922 states and 54708 transitions. Second operand has 33 states, 33 states have (on average 2.4545454545454546) internal successors, (81), 32 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:49:38,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:49:38,258 INFO L93 Difference]: Finished difference Result 13028 states and 59162 transitions. [2022-01-18 15:49:38,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-01-18 15:49:38,259 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.4545454545454546) internal successors, (81), 32 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 15:49:38,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:49:38,304 INFO L225 Difference]: With dead ends: 13028 [2022-01-18 15:49:38,305 INFO L226 Difference]: Without dead ends: 12998 [2022-01-18 15:49:38,305 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 43 SyntacticMatches, 4 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1056 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=375, Invalid=4047, Unknown=0, NotChecked=0, Total=4422 [2022-01-18 15:49:38,306 INFO L933 BasicCegarLoop]: 65 mSDtfsCounter, 484 mSDsluCounter, 3200 mSDsCounter, 0 mSdLazyCounter, 4281 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 484 SdHoareTripleChecker+Valid, 1356 SdHoareTripleChecker+Invalid, 4348 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 4281 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-01-18 15:49:38,306 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [484 Valid, 1356 Invalid, 4348 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 4281 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-01-18 15:49:38,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12998 states. [2022-01-18 15:49:38,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12998 to 11924. [2022-01-18 15:49:38,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11924 states, 11923 states have (on average 4.589197349660321) internal successors, (54717), 11923 states have internal predecessors, (54717), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:49:38,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11924 states to 11924 states and 54717 transitions. [2022-01-18 15:49:38,553 INFO L78 Accepts]: Start accepts. Automaton has 11924 states and 54717 transitions. Word has length 33 [2022-01-18 15:49:38,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:49:38,553 INFO L470 AbstractCegarLoop]: Abstraction has 11924 states and 54717 transitions. [2022-01-18 15:49:38,553 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.4545454545454546) internal successors, (81), 32 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:49:38,553 INFO L276 IsEmpty]: Start isEmpty. Operand 11924 states and 54717 transitions. [2022-01-18 15:49:38,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 15:49:38,576 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:49:38,576 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, 1, 1, 1, 1, 1] [2022-01-18 15:49:38,591 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (168)] Forceful destruction successful, exit code 0 [2022-01-18 15:49:38,776 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 168 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable171 [2022-01-18 15:49:38,776 INFO L402 AbstractCegarLoop]: === Iteration 173 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-01-18 15:49:38,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:49:38,776 INFO L85 PathProgramCache]: Analyzing trace with hash 1003944469, now seen corresponding path program 71 times [2022-01-18 15:49:38,777 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:49:38,777 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [687555474] [2022-01-18 15:49:38,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:49:38,777 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:49:38,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:49:38,963 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 15:49:38,963 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:49:38,963 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [687555474] [2022-01-18 15:49:38,963 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [687555474] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:49:38,963 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1180765749] [2022-01-18 15:49:38,963 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 15:49:38,963 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:49:38,963 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:49:38,964 INFO L229 MonitoredProcess]: Starting monitored process 169 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:49:38,965 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (169)] Waiting until timeout for monitored process [2022-01-18 15:49:38,994 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-01-18 15:49:38,994 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:49:38,995 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2022-01-18 15:49:38,995 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:49:39,350 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:49:39,350 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 21 [2022-01-18 15:49:39,443 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 15:49:39,443 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:49:39,741 INFO L353 Elim1Store]: treesize reduction 36, result has 50.7 percent of original size [2022-01-18 15:49:39,742 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 27 treesize of output 48 [2022-01-18 15:49:39,788 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:49:39,788 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:49:39,789 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:49:39,789 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:49:39,789 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 7 [2022-01-18 15:49:39,834 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 15:49:39,834 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1180765749] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:49:39,834 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:49:39,834 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 32 [2022-01-18 15:49:39,834 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1255374383] [2022-01-18 15:49:39,834 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:49:39,835 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-01-18 15:49:39,835 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:49:39,835 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-01-18 15:49:39,835 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=962, Unknown=0, NotChecked=0, Total=1056 [2022-01-18 15:49:39,835 INFO L87 Difference]: Start difference. First operand 11924 states and 54717 transitions. Second operand has 33 states, 33 states have (on average 2.4545454545454546) internal successors, (81), 32 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:49:42,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:49:42,977 INFO L93 Difference]: Finished difference Result 14210 states and 63649 transitions. [2022-01-18 15:49:42,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2022-01-18 15:49:42,977 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.4545454545454546) internal successors, (81), 32 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 15:49:42,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:49:43,017 INFO L225 Difference]: With dead ends: 14210 [2022-01-18 15:49:43,017 INFO L226 Difference]: Without dead ends: 14151 [2022-01-18 15:49:43,018 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 43 SyntacticMatches, 4 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1342 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=431, Invalid=4681, Unknown=0, NotChecked=0, Total=5112 [2022-01-18 15:49:43,018 INFO L933 BasicCegarLoop]: 84 mSDtfsCounter, 595 mSDsluCounter, 4139 mSDsCounter, 0 mSdLazyCounter, 5535 mSolverCounterSat, 84 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 595 SdHoareTripleChecker+Valid, 1726 SdHoareTripleChecker+Invalid, 5619 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 84 IncrementalHoareTripleChecker+Valid, 5535 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:49:43,019 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [595 Valid, 1726 Invalid, 5619 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [84 Valid, 5535 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2022-01-18 15:49:43,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14151 states. [2022-01-18 15:49:43,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14151 to 11925. [2022-01-18 15:49:43,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11925 states, 11924 states have (on average 4.589483394833948) internal successors, (54725), 11924 states have internal predecessors, (54725), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:49:43,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11925 states to 11925 states and 54725 transitions. [2022-01-18 15:49:43,344 INFO L78 Accepts]: Start accepts. Automaton has 11925 states and 54725 transitions. Word has length 33 [2022-01-18 15:49:43,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:49:43,344 INFO L470 AbstractCegarLoop]: Abstraction has 11925 states and 54725 transitions. [2022-01-18 15:49:43,344 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.4545454545454546) internal successors, (81), 32 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:49:43,344 INFO L276 IsEmpty]: Start isEmpty. Operand 11925 states and 54725 transitions. [2022-01-18 15:49:43,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 15:49:43,367 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:49:43,367 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, 1, 1, 1, 1, 1] [2022-01-18 15:49:43,382 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (169)] Forceful destruction successful, exit code 0 [2022-01-18 15:49:43,567 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable172,169 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:49:43,567 INFO L402 AbstractCegarLoop]: === Iteration 174 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-01-18 15:49:43,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:49:43,568 INFO L85 PathProgramCache]: Analyzing trace with hash 1425999091, now seen corresponding path program 72 times [2022-01-18 15:49:43,568 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:49:43,568 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2138538911] [2022-01-18 15:49:43,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:49:43,568 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:49:43,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:49:43,749 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 15:49:43,749 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:49:43,749 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2138538911] [2022-01-18 15:49:43,749 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2138538911] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:49:43,749 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [517992722] [2022-01-18 15:49:43,749 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 15:49:43,749 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:49:43,749 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:49:43,750 INFO L229 MonitoredProcess]: Starting monitored process 170 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:49:43,751 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (170)] Waiting until timeout for monitored process [2022-01-18 15:49:43,782 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-01-18 15:49:43,782 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:49:43,783 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2022-01-18 15:49:43,783 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:49:44,024 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:49:44,043 INFO L353 Elim1Store]: treesize reduction 14, result has 72.5 percent of original size [2022-01-18 15:49:44,043 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 31 treesize of output 55 [2022-01-18 15:49:44,315 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 15:49:44,315 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:49:44,566 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 15:49:44,567 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [517992722] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:49:44,567 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:49:44,567 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 13] total 31 [2022-01-18 15:49:44,567 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [309055865] [2022-01-18 15:49:44,567 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:49:44,567 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-01-18 15:49:44,567 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:49:44,567 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-01-18 15:49:44,567 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=880, Unknown=0, NotChecked=0, Total=992 [2022-01-18 15:49:44,568 INFO L87 Difference]: Start difference. First operand 11925 states and 54725 transitions. Second operand has 32 states, 32 states have (on average 2.46875) internal successors, (79), 31 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:49:48,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:49:48,798 INFO L93 Difference]: Finished difference Result 15371 states and 68303 transitions. [2022-01-18 15:49:48,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2022-01-18 15:49:48,798 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.46875) internal successors, (79), 31 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 15:49:48,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:49:48,840 INFO L225 Difference]: With dead ends: 15371 [2022-01-18 15:49:48,840 INFO L226 Difference]: Without dead ends: 15301 [2022-01-18 15:49:48,841 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 44 SyntacticMatches, 4 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2150 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=827, Invalid=6829, Unknown=0, NotChecked=0, Total=7656 [2022-01-18 15:49:48,841 INFO L933 BasicCegarLoop]: 79 mSDtfsCounter, 1188 mSDsluCounter, 3777 mSDsCounter, 0 mSdLazyCounter, 4986 mSolverCounterSat, 249 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1188 SdHoareTripleChecker+Valid, 1531 SdHoareTripleChecker+Invalid, 5235 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 249 IncrementalHoareTripleChecker+Valid, 4986 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-01-18 15:49:48,841 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1188 Valid, 1531 Invalid, 5235 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [249 Valid, 4986 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2022-01-18 15:49:48,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15301 states. [2022-01-18 15:49:49,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15301 to 12325. [2022-01-18 15:49:49,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12325 states, 12324 states have (on average 4.600048685491723) internal successors, (56691), 12324 states have internal predecessors, (56691), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:49:49,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12325 states to 12325 states and 56691 transitions. [2022-01-18 15:49:49,115 INFO L78 Accepts]: Start accepts. Automaton has 12325 states and 56691 transitions. Word has length 33 [2022-01-18 15:49:49,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:49:49,115 INFO L470 AbstractCegarLoop]: Abstraction has 12325 states and 56691 transitions. [2022-01-18 15:49:49,115 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.46875) internal successors, (79), 31 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:49:49,115 INFO L276 IsEmpty]: Start isEmpty. Operand 12325 states and 56691 transitions. [2022-01-18 15:49:49,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 15:49:49,140 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:49:49,140 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, 1, 1, 1, 1, 1] [2022-01-18 15:49:49,155 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (170)] Ended with exit code 0 [2022-01-18 15:49:49,340 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable173,170 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:49:49,340 INFO L402 AbstractCegarLoop]: === Iteration 175 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-01-18 15:49:49,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:49:49,340 INFO L85 PathProgramCache]: Analyzing trace with hash -1565695599, now seen corresponding path program 73 times [2022-01-18 15:49:49,340 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:49:49,341 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [884813378] [2022-01-18 15:49:49,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:49:49,341 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:49:49,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:49:49,503 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 15:49:49,503 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:49:49,503 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [884813378] [2022-01-18 15:49:49,503 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [884813378] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:49:49,503 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1980481178] [2022-01-18 15:49:49,503 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 15:49:49,503 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:49:49,503 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:49:49,504 INFO L229 MonitoredProcess]: Starting monitored process 171 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:49:49,504 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (171)] Waiting until timeout for monitored process [2022-01-18 15:49:49,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:49:49,533 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2022-01-18 15:49:49,533 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:49:49,794 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:49:49,794 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 21 [2022-01-18 15:49:49,932 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 15:49:49,932 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:49:50,166 INFO L353 Elim1Store]: treesize reduction 36, result has 50.7 percent of original size [2022-01-18 15:49:50,167 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 27 treesize of output 48 [2022-01-18 15:49:50,225 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:49:50,226 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:49:50,226 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:49:50,227 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:49:50,227 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 7 [2022-01-18 15:49:50,277 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 15:49:50,277 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1980481178] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:49:50,277 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:49:50,277 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 30 [2022-01-18 15:49:50,277 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1782543157] [2022-01-18 15:49:50,277 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:49:50,277 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-01-18 15:49:50,277 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:49:50,278 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-01-18 15:49:50,278 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=807, Unknown=0, NotChecked=0, Total=930 [2022-01-18 15:49:50,278 INFO L87 Difference]: Start difference. First operand 12325 states and 56691 transitions. Second operand has 31 states, 31 states have (on average 2.5483870967741935) internal successors, (79), 30 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:49:52,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:49:52,439 INFO L93 Difference]: Finished difference Result 15305 states and 68662 transitions. [2022-01-18 15:49:52,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2022-01-18 15:49:52,439 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.5483870967741935) internal successors, (79), 30 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 15:49:52,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:49:52,484 INFO L225 Difference]: With dead ends: 15305 [2022-01-18 15:49:52,484 INFO L226 Difference]: Without dead ends: 15253 [2022-01-18 15:49:52,484 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 50 SyntacticMatches, 4 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1234 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=547, Invalid=3743, Unknown=0, NotChecked=0, Total=4290 [2022-01-18 15:49:52,484 INFO L933 BasicCegarLoop]: 72 mSDtfsCounter, 759 mSDsluCounter, 2512 mSDsCounter, 0 mSdLazyCounter, 2860 mSolverCounterSat, 133 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 759 SdHoareTripleChecker+Valid, 994 SdHoareTripleChecker+Invalid, 3492 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 133 IncrementalHoareTripleChecker+Valid, 2860 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 499 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:49:52,484 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [759 Valid, 994 Invalid, 3492 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [133 Valid, 2860 Invalid, 0 Unknown, 499 Unchecked, 1.2s Time] [2022-01-18 15:49:52,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15253 states. [2022-01-18 15:49:52,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15253 to 12871. [2022-01-18 15:49:52,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12871 states, 12870 states have (on average 4.6015540015540015) internal successors, (59222), 12870 states have internal predecessors, (59222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:49:52,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12871 states to 12871 states and 59222 transitions. [2022-01-18 15:49:52,795 INFO L78 Accepts]: Start accepts. Automaton has 12871 states and 59222 transitions. Word has length 33 [2022-01-18 15:49:52,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:49:52,795 INFO L470 AbstractCegarLoop]: Abstraction has 12871 states and 59222 transitions. [2022-01-18 15:49:52,795 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.5483870967741935) internal successors, (79), 30 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:49:52,795 INFO L276 IsEmpty]: Start isEmpty. Operand 12871 states and 59222 transitions. [2022-01-18 15:49:52,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 15:49:52,821 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:49:52,821 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, 1, 1, 1, 1, 1] [2022-01-18 15:49:52,836 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (171)] Forceful destruction successful, exit code 0 [2022-01-18 15:49:53,021 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable174,171 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:49:53,022 INFO L402 AbstractCegarLoop]: === Iteration 176 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-01-18 15:49:53,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:49:53,022 INFO L85 PathProgramCache]: Analyzing trace with hash -1619082119, now seen corresponding path program 74 times [2022-01-18 15:49:53,022 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:49:53,022 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [269342603] [2022-01-18 15:49:53,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:49:53,022 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:49:53,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:49:53,193 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 15:49:53,193 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:49:53,193 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [269342603] [2022-01-18 15:49:53,193 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [269342603] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:49:53,193 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1819823634] [2022-01-18 15:49:53,193 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 15:49:53,193 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:49:53,193 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:49:53,194 INFO L229 MonitoredProcess]: Starting monitored process 172 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:49:53,196 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (172)] Waiting until timeout for monitored process [2022-01-18 15:49:53,227 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:49:53,227 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:49:53,228 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2022-01-18 15:49:53,228 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:49:53,474 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:49:53,474 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 3 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 49 [2022-01-18 15:49:53,949 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 15:49:53,949 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:49:54,134 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:49:54,134 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 22 [2022-01-18 15:49:54,142 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:49:54,143 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 7 [2022-01-18 15:49:54,189 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 15:49:54,189 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1819823634] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:49:54,189 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:49:54,189 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14, 13] total 29 [2022-01-18 15:49:54,189 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [228880038] [2022-01-18 15:49:54,189 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:49:54,190 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-01-18 15:49:54,190 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:49:54,190 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-01-18 15:49:54,190 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=751, Unknown=0, NotChecked=0, Total=870 [2022-01-18 15:49:54,190 INFO L87 Difference]: Start difference. First operand 12871 states and 59222 transitions. Second operand has 30 states, 30 states have (on average 2.3) internal successors, (69), 29 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 15:49:55,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:49:55,842 INFO L93 Difference]: Finished difference Result 13881 states and 63291 transitions. [2022-01-18 15:49:55,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-01-18 15:49:55,842 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.3) internal successors, (69), 29 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 33 [2022-01-18 15:49:55,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:49:55,881 INFO L225 Difference]: With dead ends: 13881 [2022-01-18 15:49:55,881 INFO L226 Difference]: Without dead ends: 13860 [2022-01-18 15:49:55,882 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 48 SyntacticMatches, 4 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 659 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=372, Invalid=2280, Unknown=0, NotChecked=0, Total=2652 [2022-01-18 15:49:55,882 INFO L933 BasicCegarLoop]: 51 mSDtfsCounter, 614 mSDsluCounter, 2066 mSDsCounter, 0 mSdLazyCounter, 2222 mSolverCounterSat, 97 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 614 SdHoareTripleChecker+Valid, 808 SdHoareTripleChecker+Invalid, 2927 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 97 IncrementalHoareTripleChecker+Valid, 2222 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 608 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-18 15:49:55,882 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [614 Valid, 808 Invalid, 2927 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [97 Valid, 2222 Invalid, 0 Unknown, 608 Unchecked, 0.8s Time] [2022-01-18 15:49:55,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13860 states. [2022-01-18 15:49:56,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13860 to 12916. [2022-01-18 15:49:56,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12916 states, 12915 states have (on average 4.598915989159892) internal successors, (59395), 12915 states have internal predecessors, (59395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:49:56,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12916 states to 12916 states and 59395 transitions. [2022-01-18 15:49:56,138 INFO L78 Accepts]: Start accepts. Automaton has 12916 states and 59395 transitions. Word has length 33 [2022-01-18 15:49:56,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:49:56,138 INFO L470 AbstractCegarLoop]: Abstraction has 12916 states and 59395 transitions. [2022-01-18 15:49:56,139 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.3) internal successors, (69), 29 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 15:49:56,139 INFO L276 IsEmpty]: Start isEmpty. Operand 12916 states and 59395 transitions. [2022-01-18 15:49:56,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 15:49:56,165 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:49:56,165 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, 1, 1, 1, 1, 1] [2022-01-18 15:49:56,181 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (172)] Ended with exit code 0 [2022-01-18 15:49:56,365 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 172 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable175 [2022-01-18 15:49:56,365 INFO L402 AbstractCegarLoop]: === Iteration 177 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-01-18 15:49:56,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:49:56,366 INFO L85 PathProgramCache]: Analyzing trace with hash -1912485126, now seen corresponding path program 1 times [2022-01-18 15:49:56,366 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:49:56,366 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [256823303] [2022-01-18 15:49:56,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:49:56,366 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:49:56,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:49:56,543 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 15:49:56,543 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:49:56,543 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [256823303] [2022-01-18 15:49:56,543 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [256823303] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:49:56,543 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [865347975] [2022-01-18 15:49:56,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:49:56,544 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:49:56,544 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:49:56,544 INFO L229 MonitoredProcess]: Starting monitored process 173 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:49:56,545 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (173)] Waiting until timeout for monitored process [2022-01-18 15:49:56,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:49:56,578 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2022-01-18 15:49:56,578 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:49:56,853 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:49:56,853 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 21 [2022-01-18 15:49:56,987 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 15:49:56,988 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:49:57,224 INFO L353 Elim1Store]: treesize reduction 36, result has 50.7 percent of original size [2022-01-18 15:49:57,224 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 27 treesize of output 48 [2022-01-18 15:49:57,284 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:49:57,284 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:49:57,285 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:49:57,285 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:49:57,286 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 27 treesize of output 7 [2022-01-18 15:49:57,331 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 15:49:57,332 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [865347975] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:49:57,332 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:49:57,332 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 30 [2022-01-18 15:49:57,332 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [30993096] [2022-01-18 15:49:57,332 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:49:57,332 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-01-18 15:49:57,332 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:49:57,332 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-01-18 15:49:57,332 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=807, Unknown=0, NotChecked=0, Total=930 [2022-01-18 15:49:57,332 INFO L87 Difference]: Start difference. First operand 12916 states and 59395 transitions. Second operand has 31 states, 31 states have (on average 2.5161290322580645) internal successors, (78), 30 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:49:59,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:49:59,598 INFO L93 Difference]: Finished difference Result 15368 states and 68891 transitions. [2022-01-18 15:49:59,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-01-18 15:49:59,598 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.5161290322580645) internal successors, (78), 30 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 15:49:59,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:49:59,642 INFO L225 Difference]: With dead ends: 15368 [2022-01-18 15:49:59,642 INFO L226 Difference]: Without dead ends: 15311 [2022-01-18 15:49:59,645 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 48 SyntacticMatches, 4 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1196 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=544, Invalid=3616, Unknown=0, NotChecked=0, Total=4160 [2022-01-18 15:49:59,646 INFO L933 BasicCegarLoop]: 70 mSDtfsCounter, 615 mSDsluCounter, 3027 mSDsCounter, 0 mSdLazyCounter, 3292 mSolverCounterSat, 124 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 615 SdHoareTripleChecker+Valid, 1215 SdHoareTripleChecker+Invalid, 3991 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 124 IncrementalHoareTripleChecker+Valid, 3292 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 575 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-01-18 15:49:59,646 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [615 Valid, 1215 Invalid, 3991 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [124 Valid, 3292 Invalid, 0 Unknown, 575 Unchecked, 1.3s Time] [2022-01-18 15:49:59,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15311 states. [2022-01-18 15:49:59,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15311 to 12960. [2022-01-18 15:49:59,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12960 states, 12959 states have (on average 4.5935643182344315) internal successors, (59528), 12959 states have internal predecessors, (59528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:49:59,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12960 states to 12960 states and 59528 transitions. [2022-01-18 15:49:59,949 INFO L78 Accepts]: Start accepts. Automaton has 12960 states and 59528 transitions. Word has length 33 [2022-01-18 15:49:59,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:49:59,949 INFO L470 AbstractCegarLoop]: Abstraction has 12960 states and 59528 transitions. [2022-01-18 15:49:59,950 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.5161290322580645) internal successors, (78), 30 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:49:59,950 INFO L276 IsEmpty]: Start isEmpty. Operand 12960 states and 59528 transitions. [2022-01-18 15:49:59,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 15:49:59,976 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:49:59,976 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, 1, 1, 1, 1, 1] [2022-01-18 15:49:59,992 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (173)] Forceful destruction successful, exit code 0 [2022-01-18 15:50:00,177 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable176,173 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:50:00,177 INFO L402 AbstractCegarLoop]: === Iteration 178 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-01-18 15:50:00,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:50:00,177 INFO L85 PathProgramCache]: Analyzing trace with hash 501733676, now seen corresponding path program 8 times [2022-01-18 15:50:00,177 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:50:00,177 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1707686764] [2022-01-18 15:50:00,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:50:00,177 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:50:00,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:50:00,334 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 15:50:00,334 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:50:00,334 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1707686764] [2022-01-18 15:50:00,334 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1707686764] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:50:00,334 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [841632028] [2022-01-18 15:50:00,334 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 15:50:00,334 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:50:00,335 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:50:00,335 INFO L229 MonitoredProcess]: Starting monitored process 174 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:50:00,336 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (174)] Waiting until timeout for monitored process [2022-01-18 15:50:00,364 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:50:00,365 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:50:00,365 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2022-01-18 15:50:00,366 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:50:00,621 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:50:00,621 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 3 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 49 [2022-01-18 15:50:01,187 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 15:50:01,187 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:50:01,373 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:50:01,374 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 22 [2022-01-18 15:50:01,383 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:50:01,384 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 7 [2022-01-18 15:50:01,429 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 15:50:01,430 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [841632028] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:50:01,430 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:50:01,430 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14, 13] total 29 [2022-01-18 15:50:01,430 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [49484837] [2022-01-18 15:50:01,430 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:50:01,430 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-01-18 15:50:01,430 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:50:01,430 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-01-18 15:50:01,430 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=749, Unknown=0, NotChecked=0, Total=870 [2022-01-18 15:50:01,430 INFO L87 Difference]: Start difference. First operand 12960 states and 59528 transitions. Second operand has 30 states, 30 states have (on average 2.3333333333333335) 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 15:50:03,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:50:03,331 INFO L93 Difference]: Finished difference Result 14238 states and 64285 transitions. [2022-01-18 15:50:03,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-01-18 15:50:03,332 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.3333333333333335) 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 33 [2022-01-18 15:50:03,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:50:03,370 INFO L225 Difference]: With dead ends: 14238 [2022-01-18 15:50:03,370 INFO L226 Difference]: Without dead ends: 14219 [2022-01-18 15:50:03,371 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 48 SyntacticMatches, 6 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 833 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=402, Invalid=2568, Unknown=0, NotChecked=0, Total=2970 [2022-01-18 15:50:03,371 INFO L933 BasicCegarLoop]: 66 mSDtfsCounter, 739 mSDsluCounter, 2466 mSDsCounter, 0 mSdLazyCounter, 2646 mSolverCounterSat, 100 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 739 SdHoareTripleChecker+Valid, 940 SdHoareTripleChecker+Invalid, 3332 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 100 IncrementalHoareTripleChecker+Valid, 2646 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 586 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-01-18 15:50:03,371 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [739 Valid, 940 Invalid, 3332 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [100 Valid, 2646 Invalid, 0 Unknown, 586 Unchecked, 1.0s Time] [2022-01-18 15:50:03,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14219 states. [2022-01-18 15:50:03,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14219 to 12999. [2022-01-18 15:50:03,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12999 states, 12998 states have (on average 4.589936913371288) internal successors, (59660), 12998 states have internal predecessors, (59660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:50:03,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12999 states to 12999 states and 59660 transitions. [2022-01-18 15:50:03,661 INFO L78 Accepts]: Start accepts. Automaton has 12999 states and 59660 transitions. Word has length 33 [2022-01-18 15:50:03,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:50:03,661 INFO L470 AbstractCegarLoop]: Abstraction has 12999 states and 59660 transitions. [2022-01-18 15:50:03,662 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.3333333333333335) 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 15:50:03,662 INFO L276 IsEmpty]: Start isEmpty. Operand 12999 states and 59660 transitions. [2022-01-18 15:50:03,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 15:50:03,688 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:50:03,688 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, 1, 1, 1, 1, 1] [2022-01-18 15:50:03,703 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (174)] Forceful destruction successful, exit code 0 [2022-01-18 15:50:03,888 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable177,174 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:50:03,888 INFO L402 AbstractCegarLoop]: === Iteration 179 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-01-18 15:50:03,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:50:03,888 INFO L85 PathProgramCache]: Analyzing trace with hash 644860661, now seen corresponding path program 75 times [2022-01-18 15:50:03,888 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:50:03,888 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1111463881] [2022-01-18 15:50:03,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:50:03,889 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:50:03,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:50:04,064 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 15:50:04,064 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:50:04,064 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1111463881] [2022-01-18 15:50:04,064 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1111463881] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:50:04,064 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1363854560] [2022-01-18 15:50:04,064 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 15:50:04,064 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:50:04,064 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:50:04,065 INFO L229 MonitoredProcess]: Starting monitored process 175 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:50:04,065 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (175)] Waiting until timeout for monitored process [2022-01-18 15:50:04,095 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-01-18 15:50:04,095 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:50:04,095 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2022-01-18 15:50:04,096 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:50:04,373 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:50:04,392 INFO L353 Elim1Store]: treesize reduction 12, result has 76.5 percent of original size [2022-01-18 15:50:04,392 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 31 treesize of output 57 [2022-01-18 15:50:04,645 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 15:50:04,645 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:50:04,856 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 15:50:04,857 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1363854560] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:50:04,857 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:50:04,857 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14, 11] total 29 [2022-01-18 15:50:04,857 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [903288904] [2022-01-18 15:50:04,857 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:50:04,857 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-01-18 15:50:04,857 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:50:04,857 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-01-18 15:50:04,857 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=762, Unknown=0, NotChecked=0, Total=870 [2022-01-18 15:50:04,857 INFO L87 Difference]: Start difference. First operand 12999 states and 59660 transitions. Second operand has 30 states, 30 states have (on average 2.533333333333333) internal successors, (76), 29 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:50:08,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:50:08,212 INFO L93 Difference]: Finished difference Result 15716 states and 70456 transitions. [2022-01-18 15:50:08,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2022-01-18 15:50:08,212 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.533333333333333) internal successors, (76), 29 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 15:50:08,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:50:08,257 INFO L225 Difference]: With dead ends: 15716 [2022-01-18 15:50:08,257 INFO L226 Difference]: Without dead ends: 15684 [2022-01-18 15:50:08,258 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 46 SyntacticMatches, 4 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1594 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=717, Invalid=5289, Unknown=0, NotChecked=0, Total=6006 [2022-01-18 15:50:08,259 INFO L933 BasicCegarLoop]: 78 mSDtfsCounter, 895 mSDsluCounter, 3552 mSDsCounter, 0 mSdLazyCounter, 4844 mSolverCounterSat, 187 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 895 SdHoareTripleChecker+Valid, 1482 SdHoareTripleChecker+Invalid, 5031 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 187 IncrementalHoareTripleChecker+Valid, 4844 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-01-18 15:50:08,259 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [895 Valid, 1482 Invalid, 5031 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [187 Valid, 4844 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-01-18 15:50:08,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15684 states. [2022-01-18 15:50:08,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15684 to 13483. [2022-01-18 15:50:08,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13483 states, 13482 states have (on average 4.60354546803145) internal successors, (62065), 13482 states have internal predecessors, (62065), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:50:08,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13483 states to 13483 states and 62065 transitions. [2022-01-18 15:50:08,560 INFO L78 Accepts]: Start accepts. Automaton has 13483 states and 62065 transitions. Word has length 33 [2022-01-18 15:50:08,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:50:08,560 INFO L470 AbstractCegarLoop]: Abstraction has 13483 states and 62065 transitions. [2022-01-18 15:50:08,561 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.533333333333333) internal successors, (76), 29 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:50:08,561 INFO L276 IsEmpty]: Start isEmpty. Operand 13483 states and 62065 transitions. [2022-01-18 15:50:08,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 15:50:08,589 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:50:08,589 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, 1, 1, 1, 1, 1] [2022-01-18 15:50:08,604 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (175)] Ended with exit code 0 [2022-01-18 15:50:08,789 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 175 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable178 [2022-01-18 15:50:08,789 INFO L402 AbstractCegarLoop]: === Iteration 180 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-01-18 15:50:08,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:50:08,790 INFO L85 PathProgramCache]: Analyzing trace with hash -1998066250, now seen corresponding path program 9 times [2022-01-18 15:50:08,790 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:50:08,790 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1813271518] [2022-01-18 15:50:08,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:50:08,790 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:50:08,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:50:08,980 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 15:50:08,980 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:50:08,980 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1813271518] [2022-01-18 15:50:08,980 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1813271518] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:50:08,980 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1727348985] [2022-01-18 15:50:08,980 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 15:50:08,980 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:50:08,980 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:50:08,981 INFO L229 MonitoredProcess]: Starting monitored process 176 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:50:08,982 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (176)] Waiting until timeout for monitored process [2022-01-18 15:50:09,010 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-01-18 15:50:09,010 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:50:09,011 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2022-01-18 15:50:09,011 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:50:09,250 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:50:09,269 INFO L353 Elim1Store]: treesize reduction 14, result has 72.5 percent of original size [2022-01-18 15:50:09,269 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 31 treesize of output 55 [2022-01-18 15:50:09,550 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 15:50:09,551 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:50:09,786 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 15:50:09,786 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1727348985] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:50:09,786 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:50:09,786 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 12] total 30 [2022-01-18 15:50:09,786 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1548549379] [2022-01-18 15:50:09,786 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:50:09,786 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-01-18 15:50:09,786 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:50:09,787 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-01-18 15:50:09,787 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=822, Unknown=0, NotChecked=0, Total=930 [2022-01-18 15:50:09,787 INFO L87 Difference]: Start difference. First operand 13483 states and 62065 transitions. Second operand has 31 states, 31 states have (on average 2.4838709677419355) internal successors, (77), 30 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:50:13,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:50:13,429 INFO L93 Difference]: Finished difference Result 15794 states and 70966 transitions. [2022-01-18 15:50:13,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2022-01-18 15:50:13,430 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.4838709677419355) internal successors, (77), 30 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 15:50:13,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:50:13,472 INFO L225 Difference]: With dead ends: 15794 [2022-01-18 15:50:13,472 INFO L226 Difference]: Without dead ends: 15717 [2022-01-18 15:50:13,473 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 45 SyntacticMatches, 4 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1911 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=738, Invalid=6068, Unknown=0, NotChecked=0, Total=6806 [2022-01-18 15:50:13,473 INFO L933 BasicCegarLoop]: 80 mSDtfsCounter, 996 mSDsluCounter, 3484 mSDsCounter, 0 mSdLazyCounter, 4654 mSolverCounterSat, 234 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 996 SdHoareTripleChecker+Valid, 1439 SdHoareTripleChecker+Invalid, 4888 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 234 IncrementalHoareTripleChecker+Valid, 4654 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-01-18 15:50:13,473 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [996 Valid, 1439 Invalid, 4888 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [234 Valid, 4654 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-01-18 15:50:13,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15717 states. [2022-01-18 15:50:13,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15717 to 13475. [2022-01-18 15:50:13,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13475 states, 13474 states have (on average 4.60397803176488) internal successors, (62034), 13474 states have internal predecessors, (62034), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:50:13,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13475 states to 13475 states and 62034 transitions. [2022-01-18 15:50:13,769 INFO L78 Accepts]: Start accepts. Automaton has 13475 states and 62034 transitions. Word has length 33 [2022-01-18 15:50:13,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:50:13,769 INFO L470 AbstractCegarLoop]: Abstraction has 13475 states and 62034 transitions. [2022-01-18 15:50:13,769 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.4838709677419355) internal successors, (77), 30 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:50:13,769 INFO L276 IsEmpty]: Start isEmpty. Operand 13475 states and 62034 transitions. [2022-01-18 15:50:13,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 15:50:13,795 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:50:13,795 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, 1, 1, 1, 1, 1] [2022-01-18 15:50:13,811 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (176)] Forceful destruction successful, exit code 0 [2022-01-18 15:50:13,996 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 176 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable179 [2022-01-18 15:50:13,996 INFO L402 AbstractCegarLoop]: === Iteration 181 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-01-18 15:50:13,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:50:13,996 INFO L85 PathProgramCache]: Analyzing trace with hash 404844174, now seen corresponding path program 2 times [2022-01-18 15:50:13,996 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:50:13,996 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [9452429] [2022-01-18 15:50:13,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:50:13,996 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:50:13,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:50:14,162 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 15:50:14,162 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:50:14,163 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [9452429] [2022-01-18 15:50:14,163 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [9452429] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:50:14,163 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [40488371] [2022-01-18 15:50:14,163 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 15:50:14,163 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:50:14,163 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:50:14,164 INFO L229 MonitoredProcess]: Starting monitored process 177 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:50:14,164 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (177)] Waiting until timeout for monitored process [2022-01-18 15:50:14,194 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:50:14,194 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:50:14,195 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2022-01-18 15:50:14,196 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:50:14,434 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:50:14,435 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 3 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 49 [2022-01-18 15:50:15,018 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 15:50:15,018 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:50:15,199 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:50:15,200 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 22 [2022-01-18 15:50:15,210 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:50:15,210 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 7 [2022-01-18 15:50:15,255 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 15:50:15,255 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [40488371] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:50:15,255 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:50:15,255 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14, 13] total 29 [2022-01-18 15:50:15,255 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1756870974] [2022-01-18 15:50:15,255 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:50:15,255 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-01-18 15:50:15,255 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:50:15,256 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-01-18 15:50:15,256 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=749, Unknown=0, NotChecked=0, Total=870 [2022-01-18 15:50:15,256 INFO L87 Difference]: Start difference. First operand 13475 states and 62034 transitions. Second operand has 30 states, 30 states have (on average 2.3333333333333335) 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 15:50:17,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:50:17,167 INFO L93 Difference]: Finished difference Result 14582 states and 66324 transitions. [2022-01-18 15:50:17,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-01-18 15:50:17,168 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.3333333333333335) 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 33 [2022-01-18 15:50:17,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:50:17,211 INFO L225 Difference]: With dead ends: 14582 [2022-01-18 15:50:17,211 INFO L226 Difference]: Without dead ends: 14545 [2022-01-18 15:50:17,212 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 48 SyntacticMatches, 6 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 818 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=416, Invalid=2554, Unknown=0, NotChecked=0, Total=2970 [2022-01-18 15:50:17,212 INFO L933 BasicCegarLoop]: 61 mSDtfsCounter, 636 mSDsluCounter, 2472 mSDsCounter, 0 mSdLazyCounter, 2699 mSolverCounterSat, 87 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 636 SdHoareTripleChecker+Valid, 946 SdHoareTripleChecker+Invalid, 3483 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 87 IncrementalHoareTripleChecker+Valid, 2699 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 697 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-01-18 15:50:17,212 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [636 Valid, 946 Invalid, 3483 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [87 Valid, 2699 Invalid, 0 Unknown, 697 Unchecked, 1.0s Time] [2022-01-18 15:50:17,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14545 states. [2022-01-18 15:50:17,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14545 to 13439. [2022-01-18 15:50:17,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13439 states, 13438 states have (on average 4.605968150022325) internal successors, (61895), 13438 states have internal predecessors, (61895), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:50:17,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13439 states to 13439 states and 61895 transitions. [2022-01-18 15:50:17,509 INFO L78 Accepts]: Start accepts. Automaton has 13439 states and 61895 transitions. Word has length 33 [2022-01-18 15:50:17,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:50:17,509 INFO L470 AbstractCegarLoop]: Abstraction has 13439 states and 61895 transitions. [2022-01-18 15:50:17,509 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.3333333333333335) 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 15:50:17,509 INFO L276 IsEmpty]: Start isEmpty. Operand 13439 states and 61895 transitions. [2022-01-18 15:50:17,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 15:50:17,537 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:50:17,538 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, 1, 1, 1, 1, 1] [2022-01-18 15:50:17,553 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (177)] Ended with exit code 0 [2022-01-18 15:50:17,738 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable180,177 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:50:17,738 INFO L402 AbstractCegarLoop]: === Iteration 182 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-01-18 15:50:17,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:50:17,738 INFO L85 PathProgramCache]: Analyzing trace with hash -85793105, now seen corresponding path program 76 times [2022-01-18 15:50:17,738 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:50:17,738 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1661763417] [2022-01-18 15:50:17,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:50:17,739 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:50:17,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:50:17,921 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 15:50:17,921 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:50:17,921 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1661763417] [2022-01-18 15:50:17,921 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1661763417] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:50:17,921 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2018531216] [2022-01-18 15:50:17,921 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 15:50:17,922 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:50:17,922 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:50:17,922 INFO L229 MonitoredProcess]: Starting monitored process 178 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:50:17,923 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (178)] Waiting until timeout for monitored process [2022-01-18 15:50:17,952 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 15:50:17,952 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:50:17,953 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2022-01-18 15:50:17,954 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:50:18,244 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:50:18,245 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 21 [2022-01-18 15:50:18,377 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 15:50:18,377 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:50:18,647 INFO L353 Elim1Store]: treesize reduction 36, result has 50.7 percent of original size [2022-01-18 15:50:18,648 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 27 treesize of output 48 [2022-01-18 15:50:18,721 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:50:18,721 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:50:18,722 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:50:18,723 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:50:18,723 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 27 treesize of output 7 [2022-01-18 15:50:18,775 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 15:50:18,776 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2018531216] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:50:18,776 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:50:18,776 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 31 [2022-01-18 15:50:18,776 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2021378411] [2022-01-18 15:50:18,776 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:50:18,776 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-01-18 15:50:18,776 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:50:18,776 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-01-18 15:50:18,777 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=886, Unknown=0, NotChecked=0, Total=992 [2022-01-18 15:50:18,777 INFO L87 Difference]: Start difference. First operand 13439 states and 61895 transitions. Second operand has 32 states, 32 states have (on average 2.59375) internal successors, (83), 31 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:50:21,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:50:21,919 INFO L93 Difference]: Finished difference Result 15258 states and 69034 transitions. [2022-01-18 15:50:21,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2022-01-18 15:50:21,920 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.59375) internal successors, (83), 31 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 15:50:21,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:50:21,965 INFO L225 Difference]: With dead ends: 15258 [2022-01-18 15:50:21,965 INFO L226 Difference]: Without dead ends: 15188 [2022-01-18 15:50:21,966 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 44 SyntacticMatches, 4 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1846 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=605, Invalid=5557, Unknown=0, NotChecked=0, Total=6162 [2022-01-18 15:50:21,966 INFO L933 BasicCegarLoop]: 77 mSDtfsCounter, 682 mSDsluCounter, 3470 mSDsCounter, 0 mSdLazyCounter, 4498 mSolverCounterSat, 150 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 682 SdHoareTripleChecker+Valid, 1390 SdHoareTripleChecker+Invalid, 4648 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 150 IncrementalHoareTripleChecker+Valid, 4498 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-01-18 15:50:21,966 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [682 Valid, 1390 Invalid, 4648 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [150 Valid, 4498 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-01-18 15:50:21,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15188 states. [2022-01-18 15:50:22,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15188 to 13495. [2022-01-18 15:50:22,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13495 states, 13494 states have (on average 4.607899807321773) internal successors, (62179), 13494 states have internal predecessors, (62179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:50:22,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13495 states to 13495 states and 62179 transitions. [2022-01-18 15:50:22,268 INFO L78 Accepts]: Start accepts. Automaton has 13495 states and 62179 transitions. Word has length 33 [2022-01-18 15:50:22,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:50:22,268 INFO L470 AbstractCegarLoop]: Abstraction has 13495 states and 62179 transitions. [2022-01-18 15:50:22,268 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.59375) internal successors, (83), 31 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:50:22,268 INFO L276 IsEmpty]: Start isEmpty. Operand 13495 states and 62179 transitions. [2022-01-18 15:50:22,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 15:50:22,295 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:50:22,295 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, 1, 1, 1, 1, 1] [2022-01-18 15:50:22,310 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (178)] Forceful destruction successful, exit code 0 [2022-01-18 15:50:22,496 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable181,178 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:50:22,496 INFO L402 AbstractCegarLoop]: === Iteration 183 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-01-18 15:50:22,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:50:22,496 INFO L85 PathProgramCache]: Analyzing trace with hash -1217129040, now seen corresponding path program 10 times [2022-01-18 15:50:22,496 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:50:22,496 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [889115283] [2022-01-18 15:50:22,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:50:22,496 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:50:22,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:50:22,656 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 15:50:22,656 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:50:22,656 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [889115283] [2022-01-18 15:50:22,656 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [889115283] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:50:22,656 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [581745875] [2022-01-18 15:50:22,656 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 15:50:22,656 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:50:22,657 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:50:22,657 INFO L229 MonitoredProcess]: Starting monitored process 179 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:50:22,658 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (179)] Waiting until timeout for monitored process [2022-01-18 15:50:22,687 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 15:50:22,687 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:50:22,687 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2022-01-18 15:50:22,688 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:50:22,945 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:50:22,947 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 35 treesize of output 19 [2022-01-18 15:50:23,070 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 15:50:23,070 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:50:23,283 INFO L353 Elim1Store]: treesize reduction 36, result has 50.7 percent of original size [2022-01-18 15:50:23,283 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 27 treesize of output 48 [2022-01-18 15:50:23,340 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:50:23,341 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:50:23,341 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:50:23,342 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:50:23,345 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 27 treesize of output 7 [2022-01-18 15:50:23,389 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 15:50:23,389 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [581745875] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:50:23,389 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:50:23,389 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 29 [2022-01-18 15:50:23,389 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1317254171] [2022-01-18 15:50:23,389 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:50:23,390 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-01-18 15:50:23,390 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:50:23,390 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-01-18 15:50:23,390 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=757, Unknown=0, NotChecked=0, Total=870 [2022-01-18 15:50:23,390 INFO L87 Difference]: Start difference. First operand 13495 states and 62179 transitions. Second operand has 30 states, 30 states have (on average 2.6) internal successors, (78), 29 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:50:25,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:50:25,629 INFO L93 Difference]: Finished difference Result 15253 states and 68928 transitions. [2022-01-18 15:50:25,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-01-18 15:50:25,629 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.6) internal successors, (78), 29 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 15:50:25,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:50:25,674 INFO L225 Difference]: With dead ends: 15253 [2022-01-18 15:50:25,674 INFO L226 Difference]: Without dead ends: 15117 [2022-01-18 15:50:25,675 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 46 SyntacticMatches, 4 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1377 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=544, Invalid=4148, Unknown=0, NotChecked=0, Total=4692 [2022-01-18 15:50:25,675 INFO L933 BasicCegarLoop]: 68 mSDtfsCounter, 714 mSDsluCounter, 2597 mSDsCounter, 0 mSdLazyCounter, 3290 mSolverCounterSat, 143 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 714 SdHoareTripleChecker+Valid, 1056 SdHoareTripleChecker+Invalid, 3433 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 143 IncrementalHoareTripleChecker+Valid, 3290 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:50:25,675 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [714 Valid, 1056 Invalid, 3433 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [143 Valid, 3290 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-01-18 15:50:25,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15117 states. [2022-01-18 15:50:25,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15117 to 13368. [2022-01-18 15:50:25,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13368 states, 13367 states have (on average 4.613451036133762) internal successors, (61668), 13367 states have internal predecessors, (61668), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:50:25,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13368 states to 13368 states and 61668 transitions. [2022-01-18 15:50:25,964 INFO L78 Accepts]: Start accepts. Automaton has 13368 states and 61668 transitions. Word has length 33 [2022-01-18 15:50:25,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:50:25,965 INFO L470 AbstractCegarLoop]: Abstraction has 13368 states and 61668 transitions. [2022-01-18 15:50:25,965 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.6) internal successors, (78), 29 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:50:25,965 INFO L276 IsEmpty]: Start isEmpty. Operand 13368 states and 61668 transitions. [2022-01-18 15:50:26,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 15:50:26,045 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:50:26,045 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, 1, 1, 1, 1, 1] [2022-01-18 15:50:26,061 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (179)] Ended with exit code 0 [2022-01-18 15:50:26,247 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable182,179 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:50:26,247 INFO L402 AbstractCegarLoop]: === Iteration 184 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-01-18 15:50:26,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:50:26,247 INFO L85 PathProgramCache]: Analyzing trace with hash -1950848000, now seen corresponding path program 11 times [2022-01-18 15:50:26,248 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:50:26,248 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1805899938] [2022-01-18 15:50:26,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:50:26,248 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:50:26,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:50:26,483 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 15:50:26,484 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:50:26,484 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1805899938] [2022-01-18 15:50:26,484 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1805899938] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:50:26,484 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2069969079] [2022-01-18 15:50:26,484 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 15:50:26,484 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:50:26,484 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:50:26,485 INFO L229 MonitoredProcess]: Starting monitored process 180 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:50:26,485 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (180)] Waiting until timeout for monitored process [2022-01-18 15:50:26,513 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-01-18 15:50:26,514 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:50:26,515 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2022-01-18 15:50:26,515 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:50:26,773 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:50:26,774 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 21 [2022-01-18 15:50:26,900 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 15:50:26,901 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:50:27,162 INFO L353 Elim1Store]: treesize reduction 36, result has 50.7 percent of original size [2022-01-18 15:50:27,162 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 27 treesize of output 48 [2022-01-18 15:50:27,215 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:50:27,215 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:50:27,216 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:50:27,216 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:50:27,218 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 27 treesize of output 7 [2022-01-18 15:50:27,261 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 15:50:27,261 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2069969079] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:50:27,261 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:50:27,261 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 32 [2022-01-18 15:50:27,261 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [115384496] [2022-01-18 15:50:27,261 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:50:27,262 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-01-18 15:50:27,262 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:50:27,262 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-01-18 15:50:27,262 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=918, Unknown=0, NotChecked=0, Total=1056 [2022-01-18 15:50:27,262 INFO L87 Difference]: Start difference. First operand 13368 states and 61668 transitions. Second operand has 33 states, 33 states have (on average 2.4545454545454546) internal successors, (81), 32 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:50:31,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:50:31,754 INFO L93 Difference]: Finished difference Result 17311 states and 76331 transitions. [2022-01-18 15:50:31,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2022-01-18 15:50:31,755 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.4545454545454546) internal successors, (81), 32 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 15:50:31,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:50:31,807 INFO L225 Difference]: With dead ends: 17311 [2022-01-18 15:50:31,807 INFO L226 Difference]: Without dead ends: 17195 [2022-01-18 15:50:31,808 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 43 SyntacticMatches, 4 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3001 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=1134, Invalid=8178, Unknown=0, NotChecked=0, Total=9312 [2022-01-18 15:50:31,808 INFO L933 BasicCegarLoop]: 72 mSDtfsCounter, 1187 mSDsluCounter, 3533 mSDsCounter, 0 mSdLazyCounter, 4445 mSolverCounterSat, 268 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1187 SdHoareTripleChecker+Valid, 1403 SdHoareTripleChecker+Invalid, 4713 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 268 IncrementalHoareTripleChecker+Valid, 4445 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-01-18 15:50:31,808 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1187 Valid, 1403 Invalid, 4713 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [268 Valid, 4445 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-01-18 15:50:31,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17195 states. [2022-01-18 15:50:32,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17195 to 13877. [2022-01-18 15:50:32,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13877 states, 13876 states have (on average 4.615451138656673) internal successors, (64044), 13876 states have internal predecessors, (64044), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:50:32,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13877 states to 13877 states and 64044 transitions. [2022-01-18 15:50:32,184 INFO L78 Accepts]: Start accepts. Automaton has 13877 states and 64044 transitions. Word has length 33 [2022-01-18 15:50:32,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:50:32,184 INFO L470 AbstractCegarLoop]: Abstraction has 13877 states and 64044 transitions. [2022-01-18 15:50:32,184 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.4545454545454546) internal successors, (81), 32 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:50:32,184 INFO L276 IsEmpty]: Start isEmpty. Operand 13877 states and 64044 transitions. [2022-01-18 15:50:32,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 15:50:32,212 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:50:32,212 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, 1, 1, 1, 1, 1] [2022-01-18 15:50:32,228 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (180)] Ended with exit code 0 [2022-01-18 15:50:32,413 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 180 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable183 [2022-01-18 15:50:32,413 INFO L402 AbstractCegarLoop]: === Iteration 185 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-01-18 15:50:32,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:50:32,413 INFO L85 PathProgramCache]: Analyzing trace with hash 154751753, now seen corresponding path program 77 times [2022-01-18 15:50:32,413 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:50:32,413 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [392954217] [2022-01-18 15:50:32,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:50:32,413 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:50:32,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:50:32,651 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 15:50:32,651 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:50:32,651 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [392954217] [2022-01-18 15:50:32,651 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [392954217] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:50:32,651 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [147604391] [2022-01-18 15:50:32,651 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 15:50:32,651 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:50:32,651 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:50:32,652 INFO L229 MonitoredProcess]: Starting monitored process 181 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:50:32,653 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (181)] Waiting until timeout for monitored process [2022-01-18 15:50:32,681 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-01-18 15:50:32,682 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:50:32,682 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2022-01-18 15:50:32,683 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:50:32,957 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:50:32,957 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 37 treesize of output 21 [2022-01-18 15:50:33,097 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 15:50:33,097 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:50:33,450 INFO L353 Elim1Store]: treesize reduction 36, result has 50.7 percent of original size [2022-01-18 15:50:33,451 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 27 treesize of output 48 [2022-01-18 15:50:33,520 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:50:33,521 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:50:33,521 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:50:33,522 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:50:33,522 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 27 treesize of output 7 [2022-01-18 15:50:33,568 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 15:50:33,568 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [147604391] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:50:33,568 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:50:33,568 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 31 [2022-01-18 15:50:33,568 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1666709313] [2022-01-18 15:50:33,569 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:50:33,569 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-01-18 15:50:33,569 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:50:33,569 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-01-18 15:50:33,569 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=858, Unknown=0, NotChecked=0, Total=992 [2022-01-18 15:50:33,569 INFO L87 Difference]: Start difference. First operand 13877 states and 64044 transitions. Second operand has 32 states, 32 states have (on average 2.4375) internal successors, (78), 31 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:50:37,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:50:37,330 INFO L93 Difference]: Finished difference Result 16887 states and 74647 transitions. [2022-01-18 15:50:37,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2022-01-18 15:50:37,331 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.4375) internal successors, (78), 31 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 15:50:37,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:50:37,379 INFO L225 Difference]: With dead ends: 16887 [2022-01-18 15:50:37,380 INFO L226 Difference]: Without dead ends: 16688 [2022-01-18 15:50:37,380 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 44 SyntacticMatches, 4 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2231 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=922, Invalid=6218, Unknown=0, NotChecked=0, Total=7140 [2022-01-18 15:50:37,381 INFO L933 BasicCegarLoop]: 75 mSDtfsCounter, 922 mSDsluCounter, 3156 mSDsCounter, 0 mSdLazyCounter, 3909 mSolverCounterSat, 208 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 922 SdHoareTripleChecker+Valid, 1310 SdHoareTripleChecker+Invalid, 4117 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 208 IncrementalHoareTripleChecker+Valid, 3909 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-01-18 15:50:37,381 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [922 Valid, 1310 Invalid, 4117 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [208 Valid, 3909 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-01-18 15:50:37,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16688 states. [2022-01-18 15:50:37,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16688 to 13644. [2022-01-18 15:50:37,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13644 states, 13643 states have (on average 4.622590339368174) internal successors, (63066), 13643 states have internal predecessors, (63066), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:50:37,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13644 states to 13644 states and 63066 transitions. [2022-01-18 15:50:37,728 INFO L78 Accepts]: Start accepts. Automaton has 13644 states and 63066 transitions. Word has length 33 [2022-01-18 15:50:37,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:50:37,728 INFO L470 AbstractCegarLoop]: Abstraction has 13644 states and 63066 transitions. [2022-01-18 15:50:37,728 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.4375) internal successors, (78), 31 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:50:37,728 INFO L276 IsEmpty]: Start isEmpty. Operand 13644 states and 63066 transitions. [2022-01-18 15:50:37,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 15:50:37,756 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:50:37,756 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, 1, 1, 1, 1, 1] [2022-01-18 15:50:37,771 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (181)] Ended with exit code 0 [2022-01-18 15:50:37,957 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable184,181 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:50:37,957 INFO L402 AbstractCegarLoop]: === Iteration 186 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-01-18 15:50:37,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:50:37,957 INFO L85 PathProgramCache]: Analyzing trace with hash -1957996389, now seen corresponding path program 78 times [2022-01-18 15:50:37,957 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:50:37,957 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1962437568] [2022-01-18 15:50:37,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:50:37,957 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:50:37,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:50:38,219 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 15:50:38,219 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:50:38,219 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1962437568] [2022-01-18 15:50:38,220 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1962437568] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:50:38,220 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [579036091] [2022-01-18 15:50:38,220 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 15:50:38,220 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:50:38,220 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:50:38,222 INFO L229 MonitoredProcess]: Starting monitored process 182 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:50:38,223 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (182)] Waiting until timeout for monitored process [2022-01-18 15:50:38,252 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-01-18 15:50:38,252 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:50:38,253 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2022-01-18 15:50:38,253 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:50:38,511 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:50:38,512 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 3 new quantified variables, introduced 3 case distinctions, treesize of input 31 treesize of output 47 [2022-01-18 15:50:39,273 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 15:50:39,273 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:50:39,556 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:50:39,556 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 22 [2022-01-18 15:50:39,566 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:50:39,566 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 7 [2022-01-18 15:50:39,613 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 15:50:39,613 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [579036091] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:50:39,613 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:50:39,613 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 34 [2022-01-18 15:50:39,613 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1666882732] [2022-01-18 15:50:39,613 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:50:39,613 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-01-18 15:50:39,613 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:50:39,613 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-01-18 15:50:39,614 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=1072, Unknown=1, NotChecked=0, Total=1190 [2022-01-18 15:50:39,614 INFO L87 Difference]: Start difference. First operand 13644 states and 63066 transitions. Second operand has 35 states, 35 states have (on average 2.2285714285714286) internal successors, (78), 34 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:50:43,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:50:43,738 INFO L93 Difference]: Finished difference Result 16340 states and 72549 transitions. [2022-01-18 15:50:43,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2022-01-18 15:50:43,738 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.2285714285714286) internal successors, (78), 34 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 15:50:43,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:50:43,783 INFO L225 Difference]: With dead ends: 16340 [2022-01-18 15:50:43,783 INFO L226 Difference]: Without dead ends: 16295 [2022-01-18 15:50:43,783 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 50 SyntacticMatches, 14 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1774 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=617, Invalid=5234, Unknown=1, NotChecked=0, Total=5852 [2022-01-18 15:50:43,783 INFO L933 BasicCegarLoop]: 64 mSDtfsCounter, 870 mSDsluCounter, 3755 mSDsCounter, 0 mSdLazyCounter, 3871 mSolverCounterSat, 113 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 870 SdHoareTripleChecker+Valid, 1527 SdHoareTripleChecker+Invalid, 4814 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 113 IncrementalHoareTripleChecker+Valid, 3871 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 830 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-01-18 15:50:43,783 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [870 Valid, 1527 Invalid, 4814 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [113 Valid, 3871 Invalid, 0 Unknown, 830 Unchecked, 1.6s Time] [2022-01-18 15:50:43,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16295 states. [2022-01-18 15:50:44,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16295 to 13990. [2022-01-18 15:50:44,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13990 states, 13989 states have (on average 4.611480448924155) internal successors, (64510), 13989 states have internal predecessors, (64510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:50:44,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13990 states to 13990 states and 64510 transitions. [2022-01-18 15:50:44,086 INFO L78 Accepts]: Start accepts. Automaton has 13990 states and 64510 transitions. Word has length 33 [2022-01-18 15:50:44,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:50:44,086 INFO L470 AbstractCegarLoop]: Abstraction has 13990 states and 64510 transitions. [2022-01-18 15:50:44,087 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.2285714285714286) internal successors, (78), 34 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:50:44,087 INFO L276 IsEmpty]: Start isEmpty. Operand 13990 states and 64510 transitions. [2022-01-18 15:50:44,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 15:50:44,116 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:50:44,116 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, 1, 1, 1, 1, 1] [2022-01-18 15:50:44,132 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (182)] Ended with exit code 0 [2022-01-18 15:50:44,316 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 182 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable185 [2022-01-18 15:50:44,317 INFO L402 AbstractCegarLoop]: === Iteration 187 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-01-18 15:50:44,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:50:44,317 INFO L85 PathProgramCache]: Analyzing trace with hash 556372605, now seen corresponding path program 79 times [2022-01-18 15:50:44,317 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:50:44,317 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [511218648] [2022-01-18 15:50:44,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:50:44,317 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:50:44,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:50:44,542 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 15:50:44,543 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:50:44,543 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [511218648] [2022-01-18 15:50:44,543 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [511218648] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:50:44,543 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1069273133] [2022-01-18 15:50:44,543 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 15:50:44,543 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:50:44,543 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:50:44,544 INFO L229 MonitoredProcess]: Starting monitored process 183 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:50:44,544 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (183)] Waiting until timeout for monitored process [2022-01-18 15:50:44,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:50:44,573 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2022-01-18 15:50:44,573 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:50:44,840 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:50:44,840 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 19 [2022-01-18 15:50:44,974 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 15:50:44,974 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:50:45,215 INFO L353 Elim1Store]: treesize reduction 36, result has 50.7 percent of original size [2022-01-18 15:50:45,215 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 27 treesize of output 48 [2022-01-18 15:50:45,271 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:50:45,272 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:50:45,272 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:50:45,273 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:50:45,273 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 27 treesize of output 7 [2022-01-18 15:50:45,316 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 15:50:45,317 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1069273133] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:50:45,317 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:50:45,317 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 31 [2022-01-18 15:50:45,317 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [658590992] [2022-01-18 15:50:45,317 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:50:45,317 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-01-18 15:50:45,317 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:50:45,317 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-01-18 15:50:45,317 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=877, Unknown=0, NotChecked=0, Total=992 [2022-01-18 15:50:45,317 INFO L87 Difference]: Start difference. First operand 13990 states and 64510 transitions. Second operand has 32 states, 32 states have (on average 2.46875) internal successors, (79), 31 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:50:50,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:50:50,149 INFO L93 Difference]: Finished difference Result 17717 states and 77823 transitions. [2022-01-18 15:50:50,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2022-01-18 15:50:50,149 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.46875) internal successors, (79), 31 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 15:50:50,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:50:50,198 INFO L225 Difference]: With dead ends: 17717 [2022-01-18 15:50:50,198 INFO L226 Difference]: Without dead ends: 17624 [2022-01-18 15:50:50,200 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 44 SyntacticMatches, 4 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3103 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=976, Invalid=8726, Unknown=0, NotChecked=0, Total=9702 [2022-01-18 15:50:50,200 INFO L933 BasicCegarLoop]: 82 mSDtfsCounter, 1025 mSDsluCounter, 4238 mSDsCounter, 0 mSdLazyCounter, 5401 mSolverCounterSat, 213 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1025 SdHoareTripleChecker+Valid, 1638 SdHoareTripleChecker+Invalid, 5614 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 213 IncrementalHoareTripleChecker+Valid, 5401 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:50:50,200 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1025 Valid, 1638 Invalid, 5614 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [213 Valid, 5401 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2022-01-18 15:50:50,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17624 states. [2022-01-18 15:50:50,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17624 to 14382. [2022-01-18 15:50:50,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14382 states, 14381 states have (on average 4.611640358806759) internal successors, (66320), 14381 states have internal predecessors, (66320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:50:50,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14382 states to 14382 states and 66320 transitions. [2022-01-18 15:50:50,681 INFO L78 Accepts]: Start accepts. Automaton has 14382 states and 66320 transitions. Word has length 33 [2022-01-18 15:50:50,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:50:50,681 INFO L470 AbstractCegarLoop]: Abstraction has 14382 states and 66320 transitions. [2022-01-18 15:50:50,681 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.46875) internal successors, (79), 31 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:50:50,681 INFO L276 IsEmpty]: Start isEmpty. Operand 14382 states and 66320 transitions. [2022-01-18 15:50:50,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 15:50:50,714 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:50:50,714 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, 1, 1, 1, 1, 1] [2022-01-18 15:50:50,729 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (183)] Ended with exit code 0 [2022-01-18 15:50:50,914 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable186,183 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:50:50,914 INFO L402 AbstractCegarLoop]: === Iteration 188 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-01-18 15:50:50,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:50:50,915 INFO L85 PathProgramCache]: Analyzing trace with hash -1649347995, now seen corresponding path program 80 times [2022-01-18 15:50:50,915 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:50:50,915 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1270103258] [2022-01-18 15:50:50,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:50:50,915 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:50:50,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:50:51,147 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 15:50:51,147 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:50:51,147 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1270103258] [2022-01-18 15:50:51,147 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1270103258] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:50:51,147 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [221259187] [2022-01-18 15:50:51,147 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 15:50:51,147 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:50:51,147 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:50:51,148 INFO L229 MonitoredProcess]: Starting monitored process 184 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:50:51,149 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (184)] Waiting until timeout for monitored process [2022-01-18 15:50:51,181 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:50:51,182 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:50:51,182 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2022-01-18 15:50:51,183 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:50:51,437 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:50:51,437 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 3 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 49 [2022-01-18 15:50:51,911 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 15:50:51,912 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:50:52,202 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:50:52,202 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 22 [2022-01-18 15:50:52,216 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:50:52,216 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 7 [2022-01-18 15:50:52,266 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 15:50:52,266 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [221259187] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:50:52,266 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:50:52,266 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 34 [2022-01-18 15:50:52,267 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1421672184] [2022-01-18 15:50:52,267 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:50:52,267 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-01-18 15:50:52,267 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:50:52,267 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-01-18 15:50:52,267 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=1060, Unknown=0, NotChecked=0, Total=1190 [2022-01-18 15:50:52,267 INFO L87 Difference]: Start difference. First operand 14382 states and 66320 transitions. Second operand has 35 states, 35 states have (on average 2.1714285714285713) internal successors, (76), 34 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:50:55,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:50:55,884 INFO L93 Difference]: Finished difference Result 17214 states and 75992 transitions. [2022-01-18 15:50:55,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2022-01-18 15:50:55,884 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.1714285714285713) internal successors, (76), 34 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 15:50:55,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:50:55,933 INFO L225 Difference]: With dead ends: 17214 [2022-01-18 15:50:55,933 INFO L226 Difference]: Without dead ends: 17120 [2022-01-18 15:50:55,934 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 43 SyntacticMatches, 4 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1483 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=654, Invalid=4896, Unknown=0, NotChecked=0, Total=5550 [2022-01-18 15:50:55,934 INFO L933 BasicCegarLoop]: 60 mSDtfsCounter, 1151 mSDsluCounter, 3133 mSDsCounter, 0 mSdLazyCounter, 3385 mSolverCounterSat, 159 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1151 SdHoareTripleChecker+Valid, 1131 SdHoareTripleChecker+Invalid, 4475 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 159 IncrementalHoareTripleChecker+Valid, 3385 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 931 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-01-18 15:50:55,934 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1151 Valid, 1131 Invalid, 4475 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [159 Valid, 3385 Invalid, 0 Unknown, 931 Unchecked, 1.5s Time] [2022-01-18 15:50:55,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17120 states. [2022-01-18 15:50:56,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17120 to 14420. [2022-01-18 15:50:56,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14420 states, 14419 states have (on average 4.612871905125182) internal successors, (66513), 14419 states have internal predecessors, (66513), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:50:56,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14420 states to 14420 states and 66513 transitions. [2022-01-18 15:50:56,293 INFO L78 Accepts]: Start accepts. Automaton has 14420 states and 66513 transitions. Word has length 33 [2022-01-18 15:50:56,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:50:56,293 INFO L470 AbstractCegarLoop]: Abstraction has 14420 states and 66513 transitions. [2022-01-18 15:50:56,294 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.1714285714285713) internal successors, (76), 34 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:50:56,294 INFO L276 IsEmpty]: Start isEmpty. Operand 14420 states and 66513 transitions. [2022-01-18 15:50:56,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 15:50:56,323 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:50:56,323 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, 1, 1, 1, 1, 1] [2022-01-18 15:50:56,337 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (184)] Ended with exit code 0 [2022-01-18 15:50:56,523 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable187,184 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:50:56,523 INFO L402 AbstractCegarLoop]: === Iteration 189 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-01-18 15:50:56,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:50:56,523 INFO L85 PathProgramCache]: Analyzing trace with hash 950808259, now seen corresponding path program 81 times [2022-01-18 15:50:56,523 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:50:56,523 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [776857821] [2022-01-18 15:50:56,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:50:56,524 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:50:56,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:50:56,775 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 15:50:56,775 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:50:56,775 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [776857821] [2022-01-18 15:50:56,775 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [776857821] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:50:56,775 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2046532979] [2022-01-18 15:50:56,775 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 15:50:56,775 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:50:56,776 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:50:56,779 INFO L229 MonitoredProcess]: Starting monitored process 185 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:50:56,780 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (185)] Waiting until timeout for monitored process [2022-01-18 15:50:56,809 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-01-18 15:50:56,809 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:50:56,810 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 45 conjunts are in the unsatisfiable core [2022-01-18 15:50:56,810 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:50:57,129 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:50:57,129 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 33 treesize of output 21 [2022-01-18 15:50:57,358 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 15:50:57,358 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:50:57,693 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 15:50:57,693 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2046532979] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:50:57,693 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:50:57,693 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 13] total 33 [2022-01-18 15:50:57,693 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [187282104] [2022-01-18 15:50:57,693 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:50:57,693 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-01-18 15:50:57,694 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:50:57,694 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-01-18 15:50:57,694 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=154, Invalid=968, Unknown=0, NotChecked=0, Total=1122 [2022-01-18 15:50:57,694 INFO L87 Difference]: Start difference. First operand 14420 states and 66513 transitions. Second operand has 34 states, 34 states have (on average 2.411764705882353) internal successors, (82), 33 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:51:03,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:51:03,614 INFO L93 Difference]: Finished difference Result 20636 states and 90422 transitions. [2022-01-18 15:51:03,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2022-01-18 15:51:03,614 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.411764705882353) internal successors, (82), 33 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 15:51:03,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:51:03,672 INFO L225 Difference]: With dead ends: 20636 [2022-01-18 15:51:03,672 INFO L226 Difference]: Without dead ends: 20566 [2022-01-18 15:51:03,674 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 43 SyntacticMatches, 3 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3343 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=1426, Invalid=8876, Unknown=0, NotChecked=0, Total=10302 [2022-01-18 15:51:03,674 INFO L933 BasicCegarLoop]: 72 mSDtfsCounter, 1319 mSDsluCounter, 4232 mSDsCounter, 0 mSdLazyCounter, 5252 mSolverCounterSat, 344 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1319 SdHoareTripleChecker+Valid, 1638 SdHoareTripleChecker+Invalid, 5596 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 344 IncrementalHoareTripleChecker+Valid, 5252 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-01-18 15:51:03,674 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1319 Valid, 1638 Invalid, 5596 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [344 Valid, 5252 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2022-01-18 15:51:03,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20566 states. [2022-01-18 15:51:04,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20566 to 15044. [2022-01-18 15:51:04,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15044 states, 15043 states have (on average 4.6553878880542445) internal successors, (70031), 15043 states have internal predecessors, (70031), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:51:04,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15044 states to 15044 states and 70031 transitions. [2022-01-18 15:51:04,095 INFO L78 Accepts]: Start accepts. Automaton has 15044 states and 70031 transitions. Word has length 33 [2022-01-18 15:51:04,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:51:04,095 INFO L470 AbstractCegarLoop]: Abstraction has 15044 states and 70031 transitions. [2022-01-18 15:51:04,095 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 2.411764705882353) internal successors, (82), 33 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:51:04,095 INFO L276 IsEmpty]: Start isEmpty. Operand 15044 states and 70031 transitions. [2022-01-18 15:51:04,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 15:51:04,126 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:51:04,126 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, 1, 1, 1, 1, 1] [2022-01-18 15:51:04,141 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (185)] Forceful destruction successful, exit code 0 [2022-01-18 15:51:04,326 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 185 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable188 [2022-01-18 15:51:04,326 INFO L402 AbstractCegarLoop]: === Iteration 190 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-01-18 15:51:04,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:51:04,326 INFO L85 PathProgramCache]: Analyzing trace with hash -1259566239, now seen corresponding path program 82 times [2022-01-18 15:51:04,326 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:51:04,327 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [276327791] [2022-01-18 15:51:04,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:51:04,327 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:51:04,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:51:04,542 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 15:51:04,543 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:51:04,543 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [276327791] [2022-01-18 15:51:04,543 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [276327791] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:51:04,543 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [845001680] [2022-01-18 15:51:04,543 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 15:51:04,543 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:51:04,543 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:51:04,544 INFO L229 MonitoredProcess]: Starting monitored process 186 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:51:04,544 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (186)] Waiting until timeout for monitored process [2022-01-18 15:51:04,572 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 15:51:04,572 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:51:04,573 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2022-01-18 15:51:04,573 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:51:04,847 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:51:04,847 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 19 [2022-01-18 15:51:04,987 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 15:51:04,987 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:51:05,244 INFO L353 Elim1Store]: treesize reduction 36, result has 50.7 percent of original size [2022-01-18 15:51:05,244 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 27 treesize of output 48 [2022-01-18 15:51:05,293 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:51:05,293 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:51:05,293 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:51:05,294 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:51:05,294 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 27 treesize of output 7 [2022-01-18 15:51:05,339 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 15:51:05,340 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [845001680] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:51:05,340 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:51:05,340 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 31 [2022-01-18 15:51:05,340 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1266723957] [2022-01-18 15:51:05,340 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:51:05,340 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-01-18 15:51:05,340 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:51:05,340 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-01-18 15:51:05,340 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=884, Unknown=0, NotChecked=0, Total=992 [2022-01-18 15:51:05,341 INFO L87 Difference]: Start difference. First operand 15044 states and 70031 transitions. Second operand has 32 states, 32 states have (on average 2.4375) internal successors, (78), 31 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:51:10,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:51:10,168 INFO L93 Difference]: Finished difference Result 17637 states and 79021 transitions. [2022-01-18 15:51:10,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2022-01-18 15:51:10,168 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.4375) internal successors, (78), 31 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 15:51:10,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:51:10,217 INFO L225 Difference]: With dead ends: 17637 [2022-01-18 15:51:10,217 INFO L226 Difference]: Without dead ends: 17500 [2022-01-18 15:51:10,218 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 46 SyntacticMatches, 4 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2771 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=865, Invalid=8065, Unknown=0, NotChecked=0, Total=8930 [2022-01-18 15:51:10,218 INFO L933 BasicCegarLoop]: 85 mSDtfsCounter, 1038 mSDsluCounter, 4251 mSDsCounter, 0 mSdLazyCounter, 5254 mSolverCounterSat, 236 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1038 SdHoareTripleChecker+Valid, 1634 SdHoareTripleChecker+Invalid, 5655 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 236 IncrementalHoareTripleChecker+Valid, 5254 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 165 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:51:10,218 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1038 Valid, 1634 Invalid, 5655 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [236 Valid, 5254 Invalid, 0 Unknown, 165 Unchecked, 2.2s Time] [2022-01-18 15:51:10,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17500 states. [2022-01-18 15:51:10,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17500 to 15001. [2022-01-18 15:51:10,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15001 states, 15000 states have (on average 4.658066666666667) internal successors, (69871), 15000 states have internal predecessors, (69871), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:51:10,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15001 states to 15001 states and 69871 transitions. [2022-01-18 15:51:10,570 INFO L78 Accepts]: Start accepts. Automaton has 15001 states and 69871 transitions. Word has length 33 [2022-01-18 15:51:10,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:51:10,570 INFO L470 AbstractCegarLoop]: Abstraction has 15001 states and 69871 transitions. [2022-01-18 15:51:10,570 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.4375) internal successors, (78), 31 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:51:10,570 INFO L276 IsEmpty]: Start isEmpty. Operand 15001 states and 69871 transitions. [2022-01-18 15:51:10,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 15:51:10,600 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:51:10,600 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, 1, 1, 1, 1, 1] [2022-01-18 15:51:10,615 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (186)] Ended with exit code 0 [2022-01-18 15:51:10,800 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 186 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable189 [2022-01-18 15:51:10,800 INFO L402 AbstractCegarLoop]: === Iteration 191 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-01-18 15:51:10,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:51:10,800 INFO L85 PathProgramCache]: Analyzing trace with hash 1205308463, now seen corresponding path program 83 times [2022-01-18 15:51:10,800 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:51:10,801 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1112087265] [2022-01-18 15:51:10,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:51:10,801 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:51:10,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:51:10,965 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 15:51:10,965 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:51:10,965 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1112087265] [2022-01-18 15:51:10,965 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1112087265] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:51:10,965 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [341276815] [2022-01-18 15:51:10,965 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 15:51:10,965 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:51:10,966 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:51:10,966 INFO L229 MonitoredProcess]: Starting monitored process 187 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:51:10,967 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (187)] Waiting until timeout for monitored process [2022-01-18 15:51:10,996 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-01-18 15:51:10,996 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:51:10,996 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2022-01-18 15:51:10,997 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:51:11,258 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:51:11,258 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 21 [2022-01-18 15:51:11,382 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 15:51:11,382 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:51:11,597 INFO L353 Elim1Store]: treesize reduction 36, result has 50.7 percent of original size [2022-01-18 15:51:11,598 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 27 treesize of output 48 [2022-01-18 15:51:11,655 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:51:11,656 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:51:11,656 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:51:11,657 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:51:11,657 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 27 treesize of output 7 [2022-01-18 15:51:11,700 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 15:51:11,700 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [341276815] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:51:11,700 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:51:11,700 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 30 [2022-01-18 15:51:11,701 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [608532671] [2022-01-18 15:51:11,701 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:51:11,701 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-01-18 15:51:11,701 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:51:11,701 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-01-18 15:51:11,701 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=803, Unknown=0, NotChecked=0, Total=930 [2022-01-18 15:51:11,701 INFO L87 Difference]: Start difference. First operand 15001 states and 69871 transitions. Second operand has 31 states, 31 states have (on average 2.5483870967741935) internal successors, (79), 30 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:51:14,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:51:14,091 INFO L93 Difference]: Finished difference Result 16718 states and 76386 transitions. [2022-01-18 15:51:14,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2022-01-18 15:51:14,091 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.5483870967741935) internal successors, (79), 30 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 15:51:14,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:51:14,146 INFO L225 Difference]: With dead ends: 16718 [2022-01-18 15:51:14,146 INFO L226 Difference]: Without dead ends: 16614 [2022-01-18 15:51:14,147 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 45 SyntacticMatches, 4 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1739 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=678, Invalid=5022, Unknown=0, NotChecked=0, Total=5700 [2022-01-18 15:51:14,147 INFO L933 BasicCegarLoop]: 59 mSDtfsCounter, 746 mSDsluCounter, 2443 mSDsCounter, 0 mSdLazyCounter, 3184 mSolverCounterSat, 146 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 746 SdHoareTripleChecker+Valid, 998 SdHoareTripleChecker+Invalid, 3330 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 146 IncrementalHoareTripleChecker+Valid, 3184 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:51:14,147 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [746 Valid, 998 Invalid, 3330 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [146 Valid, 3184 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-01-18 15:51:14,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16614 states. [2022-01-18 15:51:14,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16614 to 15258. [2022-01-18 15:51:14,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15258 states, 15257 states have (on average 4.659041751327259) internal successors, (71083), 15257 states have internal predecessors, (71083), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:51:14,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15258 states to 15258 states and 71083 transitions. [2022-01-18 15:51:14,576 INFO L78 Accepts]: Start accepts. Automaton has 15258 states and 71083 transitions. Word has length 33 [2022-01-18 15:51:14,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:51:14,576 INFO L470 AbstractCegarLoop]: Abstraction has 15258 states and 71083 transitions. [2022-01-18 15:51:14,576 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.5483870967741935) internal successors, (79), 30 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:51:14,577 INFO L276 IsEmpty]: Start isEmpty. Operand 15258 states and 71083 transitions. [2022-01-18 15:51:14,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 15:51:14,607 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:51:14,608 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, 1, 1, 1, 1, 1] [2022-01-18 15:51:14,623 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (187)] Forceful destruction successful, exit code 0 [2022-01-18 15:51:14,811 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable190,187 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:51:14,811 INFO L402 AbstractCegarLoop]: === Iteration 192 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-01-18 15:51:14,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:51:14,812 INFO L85 PathProgramCache]: Analyzing trace with hash 1151921943, now seen corresponding path program 84 times [2022-01-18 15:51:14,812 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:51:14,812 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [344822644] [2022-01-18 15:51:14,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:51:14,812 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:51:14,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:51:15,034 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 15:51:15,034 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:51:15,034 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [344822644] [2022-01-18 15:51:15,034 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [344822644] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:51:15,034 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1243646277] [2022-01-18 15:51:15,034 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 15:51:15,034 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:51:15,034 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:51:15,035 INFO L229 MonitoredProcess]: Starting monitored process 188 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:51:15,035 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (188)] Waiting until timeout for monitored process [2022-01-18 15:51:15,064 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-01-18 15:51:15,064 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:51:15,065 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 43 conjunts are in the unsatisfiable core [2022-01-18 15:51:15,065 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:51:15,307 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:51:15,326 INFO L353 Elim1Store]: treesize reduction 14, result has 72.5 percent of original size [2022-01-18 15:51:15,326 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 33 treesize of output 57 [2022-01-18 15:51:15,583 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 15:51:15,584 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:51:15,892 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 15:51:15,892 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1243646277] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:51:15,892 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:51:15,892 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 11] total 32 [2022-01-18 15:51:15,892 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [582591056] [2022-01-18 15:51:15,892 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:51:15,892 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-01-18 15:51:15,892 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:51:15,893 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-01-18 15:51:15,893 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=937, Unknown=0, NotChecked=0, Total=1056 [2022-01-18 15:51:15,893 INFO L87 Difference]: Start difference. First operand 15258 states and 71083 transitions. Second operand has 33 states, 33 states have (on average 2.5454545454545454) internal successors, (84), 32 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:51:19,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:51:19,513 INFO L93 Difference]: Finished difference Result 18861 states and 84076 transitions. [2022-01-18 15:51:19,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2022-01-18 15:51:19,514 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.5454545454545454) internal successors, (84), 32 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 15:51:19,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:51:19,566 INFO L225 Difference]: With dead ends: 18861 [2022-01-18 15:51:19,566 INFO L226 Difference]: Without dead ends: 18759 [2022-01-18 15:51:19,567 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 42 SyntacticMatches, 5 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1580 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=676, Invalid=4874, Unknown=0, NotChecked=0, Total=5550 [2022-01-18 15:51:19,567 INFO L933 BasicCegarLoop]: 75 mSDtfsCounter, 1317 mSDsluCounter, 3482 mSDsCounter, 0 mSdLazyCounter, 4344 mSolverCounterSat, 189 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1317 SdHoareTripleChecker+Valid, 1375 SdHoareTripleChecker+Invalid, 4533 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 189 IncrementalHoareTripleChecker+Valid, 4344 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-01-18 15:51:19,568 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1317 Valid, 1375 Invalid, 4533 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [189 Valid, 4344 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-01-18 15:51:19,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18759 states. [2022-01-18 15:51:19,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18759 to 15447. [2022-01-18 15:51:19,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15447 states, 15446 states have (on average 4.659264534507316) internal successors, (71967), 15446 states have internal predecessors, (71967), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:51:20,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15447 states to 15447 states and 71967 transitions. [2022-01-18 15:51:20,118 INFO L78 Accepts]: Start accepts. Automaton has 15447 states and 71967 transitions. Word has length 33 [2022-01-18 15:51:20,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:51:20,118 INFO L470 AbstractCegarLoop]: Abstraction has 15447 states and 71967 transitions. [2022-01-18 15:51:20,118 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.5454545454545454) internal successors, (84), 32 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:51:20,118 INFO L276 IsEmpty]: Start isEmpty. Operand 15447 states and 71967 transitions. [2022-01-18 15:51:20,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 15:51:20,151 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:51:20,151 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, 1, 1, 1, 1, 1] [2022-01-18 15:51:20,166 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (188)] Forceful destruction successful, exit code 0 [2022-01-18 15:51:20,351 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 188 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable191 [2022-01-18 15:51:20,352 INFO L402 AbstractCegarLoop]: === Iteration 193 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-01-18 15:51:20,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:51:20,352 INFO L85 PathProgramCache]: Analyzing trace with hash -142329247, now seen corresponding path program 85 times [2022-01-18 15:51:20,352 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:51:20,352 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [998828753] [2022-01-18 15:51:20,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:51:20,353 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:51:20,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:51:20,527 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 15:51:20,527 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:51:20,527 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [998828753] [2022-01-18 15:51:20,527 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [998828753] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:51:20,527 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1392100089] [2022-01-18 15:51:20,527 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 15:51:20,527 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:51:20,527 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:51:20,528 INFO L229 MonitoredProcess]: Starting monitored process 189 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:51:20,529 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (189)] Waiting until timeout for monitored process [2022-01-18 15:51:20,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:51:20,559 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2022-01-18 15:51:20,560 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:51:20,830 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:51:20,830 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 21 [2022-01-18 15:51:20,952 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 15:51:20,952 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:51:21,184 INFO L353 Elim1Store]: treesize reduction 36, result has 50.7 percent of original size [2022-01-18 15:51:21,184 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 27 treesize of output 48 [2022-01-18 15:51:21,238 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:51:21,238 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:51:21,239 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:51:21,239 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:51:21,239 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 27 treesize of output 7 [2022-01-18 15:51:21,282 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 15:51:21,282 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1392100089] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:51:21,283 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:51:21,283 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 31 [2022-01-18 15:51:21,283 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1756450463] [2022-01-18 15:51:21,283 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:51:21,283 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-01-18 15:51:21,283 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:51:21,283 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-01-18 15:51:21,283 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=868, Unknown=0, NotChecked=0, Total=992 [2022-01-18 15:51:21,283 INFO L87 Difference]: Start difference. First operand 15447 states and 71967 transitions. Second operand has 32 states, 32 states have (on average 2.59375) internal successors, (83), 31 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:51:23,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:51:23,967 INFO L93 Difference]: Finished difference Result 16976 states and 77789 transitions. [2022-01-18 15:51:23,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2022-01-18 15:51:23,967 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.59375) internal successors, (83), 31 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 15:51:23,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:51:24,018 INFO L225 Difference]: With dead ends: 16976 [2022-01-18 15:51:24,018 INFO L226 Difference]: Without dead ends: 16789 [2022-01-18 15:51:24,019 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 44 SyntacticMatches, 4 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2134 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=754, Invalid=6052, Unknown=0, NotChecked=0, Total=6806 [2022-01-18 15:51:24,019 INFO L933 BasicCegarLoop]: 60 mSDtfsCounter, 778 mSDsluCounter, 2541 mSDsCounter, 0 mSdLazyCounter, 3301 mSolverCounterSat, 162 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 778 SdHoareTripleChecker+Valid, 1038 SdHoareTripleChecker+Invalid, 3463 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 162 IncrementalHoareTripleChecker+Valid, 3301 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-01-18 15:51:24,019 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [778 Valid, 1038 Invalid, 3463 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [162 Valid, 3301 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-01-18 15:51:24,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16789 states. [2022-01-18 15:51:24,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16789 to 15392. [2022-01-18 15:51:24,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15392 states, 15391 states have (on average 4.659866155545449) internal successors, (71720), 15391 states have internal predecessors, (71720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:51:24,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15392 states to 15392 states and 71720 transitions. [2022-01-18 15:51:24,372 INFO L78 Accepts]: Start accepts. Automaton has 15392 states and 71720 transitions. Word has length 33 [2022-01-18 15:51:24,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:51:24,373 INFO L470 AbstractCegarLoop]: Abstraction has 15392 states and 71720 transitions. [2022-01-18 15:51:24,373 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.59375) internal successors, (83), 31 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:51:24,373 INFO L276 IsEmpty]: Start isEmpty. Operand 15392 states and 71720 transitions. [2022-01-18 15:51:24,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 15:51:24,408 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:51:24,408 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, 1, 1, 1, 1, 1] [2022-01-18 15:51:24,423 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (189)] Forceful destruction successful, exit code 0 [2022-01-18 15:51:24,608 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable192,189 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:51:24,608 INFO L402 AbstractCegarLoop]: === Iteration 194 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-01-18 15:51:24,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:51:24,609 INFO L85 PathProgramCache]: Analyzing trace with hash -654878009, now seen corresponding path program 86 times [2022-01-18 15:51:24,609 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:51:24,609 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [129659339] [2022-01-18 15:51:24,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:51:24,609 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:51:24,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:51:24,769 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 15:51:24,769 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:51:24,769 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [129659339] [2022-01-18 15:51:24,769 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [129659339] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:51:24,769 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1423098692] [2022-01-18 15:51:24,769 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 15:51:24,769 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:51:24,769 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:51:24,770 INFO L229 MonitoredProcess]: Starting monitored process 190 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:51:24,775 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (190)] Waiting until timeout for monitored process [2022-01-18 15:51:24,802 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:51:24,802 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:51:24,803 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2022-01-18 15:51:24,803 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:51:25,084 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:51:25,085 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 3 new quantified variables, introduced 3 case distinctions, treesize of input 29 treesize of output 45 [2022-01-18 15:51:25,621 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 15:51:25,621 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:51:25,802 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:51:25,803 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 22 [2022-01-18 15:51:25,812 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:51:25,812 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 7 [2022-01-18 15:51:25,859 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 15:51:25,859 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1423098692] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:51:25,859 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:51:25,859 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 30 [2022-01-18 15:51:25,859 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [630821708] [2022-01-18 15:51:25,859 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:51:25,859 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-01-18 15:51:25,859 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:51:25,860 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-01-18 15:51:25,860 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=811, Unknown=0, NotChecked=0, Total=930 [2022-01-18 15:51:25,860 INFO L87 Difference]: Start difference. First operand 15392 states and 71720 transitions. Second operand has 31 states, 31 states have (on average 2.2580645161290325) internal successors, (70), 30 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 15:51:27,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:51:27,484 INFO L93 Difference]: Finished difference Result 16443 states and 75671 transitions. [2022-01-18 15:51:27,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-01-18 15:51:27,485 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.2580645161290325) internal successors, (70), 30 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 33 [2022-01-18 15:51:27,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:51:27,534 INFO L225 Difference]: With dead ends: 16443 [2022-01-18 15:51:27,534 INFO L226 Difference]: Without dead ends: 16426 [2022-01-18 15:51:27,535 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 47 SyntacticMatches, 5 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 732 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=318, Invalid=2232, Unknown=0, NotChecked=0, Total=2550 [2022-01-18 15:51:27,535 INFO L933 BasicCegarLoop]: 61 mSDtfsCounter, 527 mSDsluCounter, 2256 mSDsCounter, 0 mSdLazyCounter, 2602 mSolverCounterSat, 73 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 527 SdHoareTripleChecker+Valid, 884 SdHoareTripleChecker+Invalid, 3211 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 2602 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 536 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-18 15:51:27,535 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [527 Valid, 884 Invalid, 3211 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 2602 Invalid, 0 Unknown, 536 Unchecked, 0.9s Time] [2022-01-18 15:51:27,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16426 states. [2022-01-18 15:51:27,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16426 to 15399. [2022-01-18 15:51:27,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15399 states, 15398 states have (on average 4.660085725418885) internal successors, (71756), 15398 states have internal predecessors, (71756), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:51:27,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15399 states to 15399 states and 71756 transitions. [2022-01-18 15:51:27,850 INFO L78 Accepts]: Start accepts. Automaton has 15399 states and 71756 transitions. Word has length 33 [2022-01-18 15:51:27,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:51:27,850 INFO L470 AbstractCegarLoop]: Abstraction has 15399 states and 71756 transitions. [2022-01-18 15:51:27,850 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.2580645161290325) internal successors, (70), 30 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 15:51:27,850 INFO L276 IsEmpty]: Start isEmpty. Operand 15399 states and 71756 transitions. [2022-01-18 15:51:27,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 15:51:27,880 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:51:27,880 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, 1, 1, 1, 1, 1] [2022-01-18 15:51:27,895 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (190)] Ended with exit code 0 [2022-01-18 15:51:28,081 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable193,190 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:51:28,081 INFO L402 AbstractCegarLoop]: === Iteration 195 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-01-18 15:51:28,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:51:28,081 INFO L85 PathProgramCache]: Analyzing trace with hash -1554240081, now seen corresponding path program 87 times [2022-01-18 15:51:28,081 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:51:28,081 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [405922987] [2022-01-18 15:51:28,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:51:28,081 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:51:28,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:51:28,294 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 15:51:28,295 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:51:28,295 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [405922987] [2022-01-18 15:51:28,295 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [405922987] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:51:28,295 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [46856306] [2022-01-18 15:51:28,295 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 15:51:28,295 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:51:28,295 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:51:28,296 INFO L229 MonitoredProcess]: Starting monitored process 191 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:51:28,297 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (191)] Waiting until timeout for monitored process [2022-01-18 15:51:28,325 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 15:51:28,325 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:51:28,326 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2022-01-18 15:51:28,326 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:51:28,609 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:51:28,609 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 3 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 49 [2022-01-18 15:51:31,288 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 15:51:31,288 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:51:31,560 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:51:31,560 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 22 [2022-01-18 15:51:31,569 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:51:31,570 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 7 [2022-01-18 15:51:31,618 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 15:51:31,618 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [46856306] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:51:31,618 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:51:31,618 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 34 [2022-01-18 15:51:31,618 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1769043135] [2022-01-18 15:51:31,618 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:51:31,618 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-01-18 15:51:31,618 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:51:31,619 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-01-18 15:51:31,619 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=1063, Unknown=1, NotChecked=0, Total=1190 [2022-01-18 15:51:31,619 INFO L87 Difference]: Start difference. First operand 15399 states and 71756 transitions. Second operand has 35 states, 35 states have (on average 2.2285714285714286) internal successors, (78), 34 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:51:35,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:51:35,288 INFO L93 Difference]: Finished difference Result 18711 states and 83306 transitions. [2022-01-18 15:51:35,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2022-01-18 15:51:35,289 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.2285714285714286) internal successors, (78), 34 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 15:51:35,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:51:35,345 INFO L225 Difference]: With dead ends: 18711 [2022-01-18 15:51:35,345 INFO L226 Difference]: Without dead ends: 18689 [2022-01-18 15:51:35,346 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 45 SyntacticMatches, 5 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2042 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=595, Invalid=5884, Unknown=1, NotChecked=0, Total=6480 [2022-01-18 15:51:35,346 INFO L933 BasicCegarLoop]: 85 mSDtfsCounter, 878 mSDsluCounter, 4037 mSDsCounter, 0 mSdLazyCounter, 4363 mSolverCounterSat, 88 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 878 SdHoareTripleChecker+Valid, 1700 SdHoareTripleChecker+Invalid, 5305 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 88 IncrementalHoareTripleChecker+Valid, 4363 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 854 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-01-18 15:51:35,346 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [878 Valid, 1700 Invalid, 5305 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [88 Valid, 4363 Invalid, 0 Unknown, 854 Unchecked, 1.8s Time] [2022-01-18 15:51:35,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18689 states. [2022-01-18 15:51:35,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18689 to 15678. [2022-01-18 15:51:35,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15678 states, 15677 states have (on average 4.658671939784398) internal successors, (73034), 15677 states have internal predecessors, (73034), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:51:35,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15678 states to 15678 states and 73034 transitions. [2022-01-18 15:51:35,840 INFO L78 Accepts]: Start accepts. Automaton has 15678 states and 73034 transitions. Word has length 33 [2022-01-18 15:51:35,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:51:35,840 INFO L470 AbstractCegarLoop]: Abstraction has 15678 states and 73034 transitions. [2022-01-18 15:51:35,841 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.2285714285714286) internal successors, (78), 34 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:51:35,841 INFO L276 IsEmpty]: Start isEmpty. Operand 15678 states and 73034 transitions. [2022-01-18 15:51:35,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 15:51:35,872 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:51:35,872 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, 1, 1, 1, 1, 1] [2022-01-18 15:51:35,887 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (191)] Ended with exit code 0 [2022-01-18 15:51:36,072 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable194,191 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:51:36,072 INFO L402 AbstractCegarLoop]: === Iteration 196 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-01-18 15:51:36,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:51:36,073 INFO L85 PathProgramCache]: Analyzing trace with hash 960128913, now seen corresponding path program 88 times [2022-01-18 15:51:36,073 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:51:36,074 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1320207923] [2022-01-18 15:51:36,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:51:36,074 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:51:36,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:51:36,311 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 15:51:36,311 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:51:36,311 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1320207923] [2022-01-18 15:51:36,311 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1320207923] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:51:36,311 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1639504865] [2022-01-18 15:51:36,311 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 15:51:36,311 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:51:36,311 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:51:36,313 INFO L229 MonitoredProcess]: Starting monitored process 192 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:51:36,313 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (192)] Waiting until timeout for monitored process [2022-01-18 15:51:36,344 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 15:51:36,344 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:51:36,345 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2022-01-18 15:51:36,345 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:51:36,655 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:51:36,656 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 21 [2022-01-18 15:51:36,765 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 15:51:36,765 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:51:37,012 INFO L353 Elim1Store]: treesize reduction 36, result has 50.7 percent of original size [2022-01-18 15:51:37,012 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 27 treesize of output 48 [2022-01-18 15:51:37,071 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:51:37,071 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:51:37,072 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:51:37,072 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:51:37,073 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 27 treesize of output 7 [2022-01-18 15:51:37,116 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 15:51:37,116 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1639504865] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:51:37,117 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:51:37,117 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 31 [2022-01-18 15:51:37,117 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1512602579] [2022-01-18 15:51:37,117 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:51:37,117 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-01-18 15:51:37,117 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:51:37,117 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-01-18 15:51:37,117 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=868, Unknown=0, NotChecked=0, Total=992 [2022-01-18 15:51:37,117 INFO L87 Difference]: Start difference. First operand 15678 states and 73034 transitions. Second operand has 32 states, 32 states have (on average 2.46875) internal successors, (79), 31 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:51:42,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:51:42,015 INFO L93 Difference]: Finished difference Result 19928 states and 88107 transitions. [2022-01-18 15:51:42,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2022-01-18 15:51:42,015 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.46875) internal successors, (79), 31 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 15:51:42,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:51:42,076 INFO L225 Difference]: With dead ends: 19928 [2022-01-18 15:51:42,076 INFO L226 Difference]: Without dead ends: 19813 [2022-01-18 15:51:42,077 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 44 SyntacticMatches, 4 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3509 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=1047, Invalid=9459, Unknown=0, NotChecked=0, Total=10506 [2022-01-18 15:51:42,077 INFO L933 BasicCegarLoop]: 82 mSDtfsCounter, 1207 mSDsluCounter, 3820 mSDsCounter, 0 mSdLazyCounter, 4897 mSolverCounterSat, 198 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1207 SdHoareTripleChecker+Valid, 1482 SdHoareTripleChecker+Invalid, 5095 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 198 IncrementalHoareTripleChecker+Valid, 4897 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:51:42,077 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1207 Valid, 1482 Invalid, 5095 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [198 Valid, 4897 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2022-01-18 15:51:42,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19813 states. [2022-01-18 15:51:42,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19813 to 16009. [2022-01-18 15:51:42,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16009 states, 16008 states have (on average 4.664730134932534) internal successors, (74673), 16008 states have internal predecessors, (74673), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:51:42,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16009 states to 16009 states and 74673 transitions. [2022-01-18 15:51:42,547 INFO L78 Accepts]: Start accepts. Automaton has 16009 states and 74673 transitions. Word has length 33 [2022-01-18 15:51:42,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:51:42,547 INFO L470 AbstractCegarLoop]: Abstraction has 16009 states and 74673 transitions. [2022-01-18 15:51:42,548 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.46875) internal successors, (79), 31 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:51:42,548 INFO L276 IsEmpty]: Start isEmpty. Operand 16009 states and 74673 transitions. [2022-01-18 15:51:42,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 15:51:42,646 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:51:42,647 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, 1, 1, 1, 1, 1] [2022-01-18 15:51:42,661 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (192)] Forceful destruction successful, exit code 0 [2022-01-18 15:51:42,847 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable195,192 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:51:42,847 INFO L402 AbstractCegarLoop]: === Iteration 197 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-01-18 15:51:42,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:51:42,848 INFO L85 PathProgramCache]: Analyzing trace with hash -2002515719, now seen corresponding path program 89 times [2022-01-18 15:51:42,848 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:51:42,848 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1264173027] [2022-01-18 15:51:42,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:51:42,848 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:51:42,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:51:43,013 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 15:51:43,013 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:51:43,013 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1264173027] [2022-01-18 15:51:43,013 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1264173027] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:51:43,013 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1830935350] [2022-01-18 15:51:43,013 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 15:51:43,013 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:51:43,013 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:51:43,014 INFO L229 MonitoredProcess]: Starting monitored process 193 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:51:43,015 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (193)] Waiting until timeout for monitored process [2022-01-18 15:51:43,043 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 15:51:43,043 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:51:43,044 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2022-01-18 15:51:43,044 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:51:43,338 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:51:43,338 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 21 [2022-01-18 15:51:43,447 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 15:51:43,447 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:51:43,713 INFO L353 Elim1Store]: treesize reduction 36, result has 50.7 percent of original size [2022-01-18 15:51:43,713 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 27 treesize of output 48 [2022-01-18 15:51:43,770 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:51:43,770 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:51:43,771 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:51:43,771 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:51:43,772 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 27 treesize of output 7 [2022-01-18 15:51:43,816 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 15:51:43,816 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1830935350] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:51:43,816 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:51:43,816 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 31 [2022-01-18 15:51:43,816 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1701488488] [2022-01-18 15:51:43,816 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:51:43,816 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-01-18 15:51:43,816 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:51:43,817 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-01-18 15:51:43,817 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=869, Unknown=0, NotChecked=0, Total=992 [2022-01-18 15:51:43,817 INFO L87 Difference]: Start difference. First operand 16009 states and 74673 transitions. Second operand has 32 states, 32 states have (on average 2.59375) internal successors, (83), 31 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:51:46,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:51:46,436 INFO L93 Difference]: Finished difference Result 17781 states and 81478 transitions. [2022-01-18 15:51:46,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2022-01-18 15:51:46,437 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.59375) internal successors, (83), 31 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 15:51:46,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:51:46,488 INFO L225 Difference]: With dead ends: 17781 [2022-01-18 15:51:46,488 INFO L226 Difference]: Without dead ends: 17651 [2022-01-18 15:51:46,489 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 45 SyntacticMatches, 4 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1735 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=572, Invalid=5280, Unknown=0, NotChecked=0, Total=5852 [2022-01-18 15:51:46,489 INFO L933 BasicCegarLoop]: 70 mSDtfsCounter, 700 mSDsluCounter, 2984 mSDsCounter, 0 mSdLazyCounter, 3379 mSolverCounterSat, 145 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 700 SdHoareTripleChecker+Valid, 1209 SdHoareTripleChecker+Invalid, 4016 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 145 IncrementalHoareTripleChecker+Valid, 3379 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 492 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-01-18 15:51:46,489 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [700 Valid, 1209 Invalid, 4016 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [145 Valid, 3379 Invalid, 0 Unknown, 492 Unchecked, 1.4s Time] [2022-01-18 15:51:46,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17651 states. [2022-01-18 15:51:46,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17651 to 15985. [2022-01-18 15:51:46,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15985 states, 15984 states have (on average 4.662787787787788) internal successors, (74530), 15984 states have internal predecessors, (74530), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:51:46,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15985 states to 15985 states and 74530 transitions. [2022-01-18 15:51:46,857 INFO L78 Accepts]: Start accepts. Automaton has 15985 states and 74530 transitions. Word has length 33 [2022-01-18 15:51:46,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:51:46,857 INFO L470 AbstractCegarLoop]: Abstraction has 15985 states and 74530 transitions. [2022-01-18 15:51:46,857 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.59375) internal successors, (83), 31 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:51:46,857 INFO L276 IsEmpty]: Start isEmpty. Operand 15985 states and 74530 transitions. [2022-01-18 15:51:46,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 15:51:46,890 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:51:46,890 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, 1, 1, 1, 1, 1] [2022-01-18 15:51:46,905 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (193)] Ended with exit code 0 [2022-01-18 15:51:47,090 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable196,193 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:51:47,090 INFO L402 AbstractCegarLoop]: === Iteration 198 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-01-18 15:51:47,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:51:47,090 INFO L85 PathProgramCache]: Analyzing trace with hash -1115012038, now seen corresponding path program 12 times [2022-01-18 15:51:47,090 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:51:47,090 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [230154084] [2022-01-18 15:51:47,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:51:47,091 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:51:47,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:51:47,261 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 15:51:47,262 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:51:47,262 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [230154084] [2022-01-18 15:51:47,262 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [230154084] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:51:47,262 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [857875107] [2022-01-18 15:51:47,262 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 15:51:47,262 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:51:47,262 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:51:47,263 INFO L229 MonitoredProcess]: Starting monitored process 194 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:51:47,263 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (194)] Waiting until timeout for monitored process [2022-01-18 15:51:47,292 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 15:51:47,292 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:51:47,293 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2022-01-18 15:51:47,293 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:51:47,571 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:51:47,591 INFO L353 Elim1Store]: treesize reduction 14, result has 72.5 percent of original size [2022-01-18 15:51:47,592 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 32 treesize of output 56 [2022-01-18 15:51:47,812 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 15:51:47,812 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:51:48,077 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 15:51:48,077 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [857875107] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:51:48,078 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:51:48,078 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 11] total 30 [2022-01-18 15:51:48,078 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1748546441] [2022-01-18 15:51:48,078 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:51:48,078 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-01-18 15:51:48,078 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:51:48,078 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-01-18 15:51:48,078 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=825, Unknown=0, NotChecked=0, Total=930 [2022-01-18 15:51:48,078 INFO L87 Difference]: Start difference. First operand 15985 states and 74530 transitions. Second operand has 31 states, 31 states have (on average 2.4838709677419355) internal successors, (77), 30 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:51:51,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:51:51,091 INFO L93 Difference]: Finished difference Result 18228 states and 83086 transitions. [2022-01-18 15:51:51,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2022-01-18 15:51:51,091 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.4838709677419355) internal successors, (77), 30 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 15:51:51,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:51:51,144 INFO L225 Difference]: With dead ends: 18228 [2022-01-18 15:51:51,144 INFO L226 Difference]: Without dead ends: 18148 [2022-01-18 15:51:51,144 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 45 SyntacticMatches, 4 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1581 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=555, Invalid=4995, Unknown=0, NotChecked=0, Total=5550 [2022-01-18 15:51:51,144 INFO L933 BasicCegarLoop]: 84 mSDtfsCounter, 918 mSDsluCounter, 2979 mSDsCounter, 0 mSdLazyCounter, 3923 mSolverCounterSat, 177 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 918 SdHoareTripleChecker+Valid, 1229 SdHoareTripleChecker+Invalid, 4100 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 177 IncrementalHoareTripleChecker+Valid, 3923 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-01-18 15:51:51,144 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [918 Valid, 1229 Invalid, 4100 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [177 Valid, 3923 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-01-18 15:51:51,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18148 states. [2022-01-18 15:51:51,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18148 to 16027. [2022-01-18 15:51:51,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16027 states, 16026 states have (on average 4.663234743541745) internal successors, (74733), 16026 states have internal predecessors, (74733), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:51:51,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16027 states to 16027 states and 74733 transitions. [2022-01-18 15:51:51,491 INFO L78 Accepts]: Start accepts. Automaton has 16027 states and 74733 transitions. Word has length 33 [2022-01-18 15:51:51,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:51:51,491 INFO L470 AbstractCegarLoop]: Abstraction has 16027 states and 74733 transitions. [2022-01-18 15:51:51,491 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.4838709677419355) internal successors, (77), 30 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:51:51,492 INFO L276 IsEmpty]: Start isEmpty. Operand 16027 states and 74733 transitions. [2022-01-18 15:51:51,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 15:51:51,524 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:51:51,524 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, 1, 1, 1, 1, 1] [2022-01-18 15:51:51,539 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (194)] Ended with exit code 0 [2022-01-18 15:51:51,724 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable197,194 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:51:51,724 INFO L402 AbstractCegarLoop]: === Iteration 199 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-01-18 15:51:51,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:51:51,724 INFO L85 PathProgramCache]: Analyzing trace with hash 1352994994, now seen corresponding path program 13 times [2022-01-18 15:51:51,724 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:51:51,725 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [338441257] [2022-01-18 15:51:51,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:51:51,725 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:51:51,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:51:51,888 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 15:51:51,888 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:51:51,888 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [338441257] [2022-01-18 15:51:51,888 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [338441257] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:51:51,888 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [477952647] [2022-01-18 15:51:51,888 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 15:51:51,888 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:51:51,888 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:51:51,889 INFO L229 MonitoredProcess]: Starting monitored process 195 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:51:51,890 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (195)] Waiting until timeout for monitored process [2022-01-18 15:51:51,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:51:51,919 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2022-01-18 15:51:51,920 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:51:52,251 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:51:52,251 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 21 [2022-01-18 15:51:52,342 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 15:51:52,342 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:51:52,592 INFO L353 Elim1Store]: treesize reduction 36, result has 50.7 percent of original size [2022-01-18 15:51:52,592 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 27 treesize of output 48 [2022-01-18 15:51:52,649 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:51:52,649 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:51:52,650 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:51:52,650 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:51:52,651 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 27 treesize of output 7 [2022-01-18 15:51:52,695 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 15:51:52,695 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [477952647] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:51:52,695 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:51:52,695 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 31 [2022-01-18 15:51:52,695 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1037590618] [2022-01-18 15:51:52,695 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:51:52,695 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-01-18 15:51:52,696 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:51:52,696 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-01-18 15:51:52,696 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=879, Unknown=0, NotChecked=0, Total=992 [2022-01-18 15:51:52,696 INFO L87 Difference]: Start difference. First operand 16027 states and 74733 transitions. Second operand has 32 states, 32 states have (on average 2.59375) internal successors, (83), 31 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:51:55,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:51:55,170 INFO L93 Difference]: Finished difference Result 17634 states and 81016 transitions. [2022-01-18 15:51:55,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2022-01-18 15:51:55,170 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.59375) internal successors, (83), 31 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 15:51:55,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:51:55,224 INFO L225 Difference]: With dead ends: 17634 [2022-01-18 15:51:55,224 INFO L226 Difference]: Without dead ends: 17555 [2022-01-18 15:51:55,225 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 44 SyntacticMatches, 4 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1635 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=544, Invalid=5156, Unknown=0, NotChecked=0, Total=5700 [2022-01-18 15:51:55,225 INFO L933 BasicCegarLoop]: 60 mSDtfsCounter, 694 mSDsluCounter, 2326 mSDsCounter, 0 mSdLazyCounter, 3028 mSolverCounterSat, 124 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 694 SdHoareTripleChecker+Valid, 972 SdHoareTripleChecker+Invalid, 3152 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 124 IncrementalHoareTripleChecker+Valid, 3028 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-01-18 15:51:55,225 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [694 Valid, 972 Invalid, 3152 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [124 Valid, 3028 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-01-18 15:51:55,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17555 states. [2022-01-18 15:51:55,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17555 to 15990. [2022-01-18 15:51:55,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15990 states, 15989 states have (on average 4.667396334980299) internal successors, (74627), 15989 states have internal predecessors, (74627), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:51:55,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15990 states to 15990 states and 74627 transitions. [2022-01-18 15:51:55,590 INFO L78 Accepts]: Start accepts. Automaton has 15990 states and 74627 transitions. Word has length 33 [2022-01-18 15:51:55,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:51:55,590 INFO L470 AbstractCegarLoop]: Abstraction has 15990 states and 74627 transitions. [2022-01-18 15:51:55,590 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.59375) internal successors, (83), 31 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:51:55,590 INFO L276 IsEmpty]: Start isEmpty. Operand 15990 states and 74627 transitions. [2022-01-18 15:51:55,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 15:51:55,623 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:51:55,623 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, 1, 1, 1, 1, 1] [2022-01-18 15:51:55,638 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (195)] Forceful destruction successful, exit code 0 [2022-01-18 15:51:55,823 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 195 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable198 [2022-01-18 15:51:55,824 INFO L402 AbstractCegarLoop]: === Iteration 200 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-01-18 15:51:55,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:51:55,824 INFO L85 PathProgramCache]: Analyzing trace with hash 756920949, now seen corresponding path program 90 times [2022-01-18 15:51:55,824 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:51:55,824 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [780239483] [2022-01-18 15:51:55,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:51:55,824 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:51:55,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:51:56,062 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 15:51:56,062 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:51:56,062 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [780239483] [2022-01-18 15:51:56,062 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [780239483] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:51:56,062 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [210149635] [2022-01-18 15:51:56,062 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 15:51:56,062 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:51:56,062 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:51:56,063 INFO L229 MonitoredProcess]: Starting monitored process 196 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:51:56,064 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (196)] Waiting until timeout for monitored process [2022-01-18 15:51:56,092 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 15:51:56,092 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:51:56,093 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2022-01-18 15:51:56,093 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:51:56,383 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:51:56,404 INFO L353 Elim1Store]: treesize reduction 14, result has 72.5 percent of original size [2022-01-18 15:51:56,404 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 29 treesize of output 53 [2022-01-18 15:51:56,691 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 15:51:56,691 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:51:57,035 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 15:51:57,035 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [210149635] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:51:57,035 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:51:57,035 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 12] total 33 [2022-01-18 15:51:57,035 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2093057089] [2022-01-18 15:51:57,035 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:51:57,035 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-01-18 15:51:57,035 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:51:57,036 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-01-18 15:51:57,036 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=1002, Unknown=0, NotChecked=0, Total=1122 [2022-01-18 15:51:57,036 INFO L87 Difference]: Start difference. First operand 15990 states and 74627 transitions. Second operand has 34 states, 34 states have (on average 2.4705882352941178) internal successors, (84), 33 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:52:01,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:52:01,824 INFO L93 Difference]: Finished difference Result 19522 states and 86559 transitions. [2022-01-18 15:52:01,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2022-01-18 15:52:01,824 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.4705882352941178) internal successors, (84), 33 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 15:52:01,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:52:01,883 INFO L225 Difference]: With dead ends: 19522 [2022-01-18 15:52:01,883 INFO L226 Difference]: Without dead ends: 19461 [2022-01-18 15:52:01,884 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 41 SyntacticMatches, 5 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2636 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=948, Invalid=7424, Unknown=0, NotChecked=0, Total=8372 [2022-01-18 15:52:01,884 INFO L933 BasicCegarLoop]: 81 mSDtfsCounter, 1570 mSDsluCounter, 4214 mSDsCounter, 0 mSdLazyCounter, 5289 mSolverCounterSat, 211 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1570 SdHoareTripleChecker+Valid, 1623 SdHoareTripleChecker+Invalid, 5500 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 211 IncrementalHoareTripleChecker+Valid, 5289 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:52:01,884 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1570 Valid, 1623 Invalid, 5500 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [211 Valid, 5289 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2022-01-18 15:52:01,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19461 states. [2022-01-18 15:52:02,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19461 to 16114. [2022-01-18 15:52:02,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16114 states, 16113 states have (on average 4.663749767268665) internal successors, (75147), 16113 states have internal predecessors, (75147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:52:02,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16114 states to 16114 states and 75147 transitions. [2022-01-18 15:52:02,338 INFO L78 Accepts]: Start accepts. Automaton has 16114 states and 75147 transitions. Word has length 33 [2022-01-18 15:52:02,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:52:02,338 INFO L470 AbstractCegarLoop]: Abstraction has 16114 states and 75147 transitions. [2022-01-18 15:52:02,338 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 2.4705882352941178) internal successors, (84), 33 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:52:02,338 INFO L276 IsEmpty]: Start isEmpty. Operand 16114 states and 75147 transitions. [2022-01-18 15:52:02,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 15:52:02,371 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:52:02,372 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, 1, 1, 1, 1, 1] [2022-01-18 15:52:02,394 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (196)] Forceful destruction successful, exit code 0 [2022-01-18 15:52:02,572 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 196 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable199 [2022-01-18 15:52:02,572 INFO L402 AbstractCegarLoop]: === Iteration 201 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-01-18 15:52:02,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:52:02,572 INFO L85 PathProgramCache]: Analyzing trace with hash 1602896501, now seen corresponding path program 91 times [2022-01-18 15:52:02,572 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:52:02,572 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1828317988] [2022-01-18 15:52:02,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:52:02,572 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:52:02,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:52:02,809 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 15:52:02,809 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:52:02,809 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1828317988] [2022-01-18 15:52:02,809 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1828317988] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:52:02,809 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1933662155] [2022-01-18 15:52:02,809 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 15:52:02,809 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:52:02,809 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:52:02,810 INFO L229 MonitoredProcess]: Starting monitored process 197 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:52:02,813 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (197)] Waiting until timeout for monitored process [2022-01-18 15:52:02,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:52:02,850 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2022-01-18 15:52:02,851 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:52:03,148 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:52:03,148 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 21 [2022-01-18 15:52:03,263 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 15:52:03,263 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:52:03,507 INFO L353 Elim1Store]: treesize reduction 36, result has 50.7 percent of original size [2022-01-18 15:52:03,508 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 27 treesize of output 48 [2022-01-18 15:52:03,578 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:52:03,580 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:52:03,580 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:52:03,581 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:52:03,581 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 27 treesize of output 7 [2022-01-18 15:52:03,627 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 15:52:03,627 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1933662155] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:52:03,627 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:52:03,627 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 31 [2022-01-18 15:52:03,627 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [29561260] [2022-01-18 15:52:03,627 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:52:03,627 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-01-18 15:52:03,627 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:52:03,628 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-01-18 15:52:03,628 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=869, Unknown=0, NotChecked=0, Total=992 [2022-01-18 15:52:03,628 INFO L87 Difference]: Start difference. First operand 16114 states and 75147 transitions. Second operand has 32 states, 32 states have (on average 2.4375) internal successors, (78), 31 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:52:09,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:52:09,181 INFO L93 Difference]: Finished difference Result 20429 states and 90191 transitions. [2022-01-18 15:52:09,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2022-01-18 15:52:09,181 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.4375) internal successors, (78), 31 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 15:52:09,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:52:09,242 INFO L225 Difference]: With dead ends: 20429 [2022-01-18 15:52:09,243 INFO L226 Difference]: Without dead ends: 20249 [2022-01-18 15:52:09,244 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 44 SyntacticMatches, 4 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3783 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=1160, Invalid=9970, Unknown=0, NotChecked=0, Total=11130 [2022-01-18 15:52:09,244 INFO L933 BasicCegarLoop]: 87 mSDtfsCounter, 1240 mSDsluCounter, 4113 mSDsCounter, 0 mSdLazyCounter, 4950 mSolverCounterSat, 199 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1240 SdHoareTripleChecker+Valid, 1523 SdHoareTripleChecker+Invalid, 5675 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 199 IncrementalHoareTripleChecker+Valid, 4950 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 526 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-01-18 15:52:09,244 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1240 Valid, 1523 Invalid, 5675 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [199 Valid, 4950 Invalid, 0 Unknown, 526 Unchecked, 2.3s Time] [2022-01-18 15:52:09,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20249 states. [2022-01-18 15:52:09,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20249 to 16303. [2022-01-18 15:52:09,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16303 states, 16302 states have (on average 4.6705312231628024) internal successors, (76139), 16302 states have internal predecessors, (76139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:52:09,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16303 states to 16303 states and 76139 transitions. [2022-01-18 15:52:09,701 INFO L78 Accepts]: Start accepts. Automaton has 16303 states and 76139 transitions. Word has length 33 [2022-01-18 15:52:09,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:52:09,701 INFO L470 AbstractCegarLoop]: Abstraction has 16303 states and 76139 transitions. [2022-01-18 15:52:09,701 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.4375) internal successors, (78), 31 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:52:09,701 INFO L276 IsEmpty]: Start isEmpty. Operand 16303 states and 76139 transitions. [2022-01-18 15:52:09,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 15:52:09,733 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:52:09,733 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, 1, 1, 1, 1, 1] [2022-01-18 15:52:09,748 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (197)] Ended with exit code 0 [2022-01-18 15:52:09,933 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable200,197 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:52:09,933 INFO L402 AbstractCegarLoop]: === Iteration 202 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-01-18 15:52:09,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:52:09,934 INFO L85 PathProgramCache]: Analyzing trace with hash -62579695, now seen corresponding path program 92 times [2022-01-18 15:52:09,934 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:52:09,934 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [236886494] [2022-01-18 15:52:09,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:52:09,934 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:52:09,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:52:10,105 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 15:52:10,106 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:52:10,106 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [236886494] [2022-01-18 15:52:10,106 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [236886494] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:52:10,106 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1259833293] [2022-01-18 15:52:10,106 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 15:52:10,106 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:52:10,106 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:52:10,107 INFO L229 MonitoredProcess]: Starting monitored process 198 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:52:10,107 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (198)] Waiting until timeout for monitored process [2022-01-18 15:52:10,135 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:52:10,135 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:52:10,136 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2022-01-18 15:52:10,136 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:52:10,412 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:52:10,412 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 29 treesize of output 45 [2022-01-18 15:52:10,825 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 15:52:10,825 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:52:10,996 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:52:10,996 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 22 [2022-01-18 15:52:11,004 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:52:11,005 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 7 [2022-01-18 15:52:11,050 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 15:52:11,050 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1259833293] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:52:11,050 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:52:11,050 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 29 [2022-01-18 15:52:11,050 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1167329333] [2022-01-18 15:52:11,050 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:52:11,050 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-01-18 15:52:11,050 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:52:11,051 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-01-18 15:52:11,051 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=769, Unknown=0, NotChecked=0, Total=870 [2022-01-18 15:52:11,051 INFO L87 Difference]: Start difference. First operand 16303 states and 76139 transitions. Second operand has 30 states, 30 states have (on average 2.3) internal successors, (69), 29 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 15:52:13,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:52:13,088 INFO L93 Difference]: Finished difference Result 16950 states and 78639 transitions. [2022-01-18 15:52:13,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-01-18 15:52:13,088 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.3) internal successors, (69), 29 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 33 [2022-01-18 15:52:13,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:52:13,140 INFO L225 Difference]: With dead ends: 16950 [2022-01-18 15:52:13,140 INFO L226 Difference]: Without dead ends: 16921 [2022-01-18 15:52:13,141 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 47 SyntacticMatches, 6 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 690 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=285, Invalid=2165, Unknown=0, NotChecked=0, Total=2450 [2022-01-18 15:52:13,141 INFO L933 BasicCegarLoop]: 56 mSDtfsCounter, 503 mSDsluCounter, 2616 mSDsCounter, 0 mSdLazyCounter, 3298 mSolverCounterSat, 100 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 503 SdHoareTripleChecker+Valid, 1009 SdHoareTripleChecker+Invalid, 3772 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 100 IncrementalHoareTripleChecker+Valid, 3298 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 374 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-01-18 15:52:13,141 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [503 Valid, 1009 Invalid, 3772 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [100 Valid, 3298 Invalid, 0 Unknown, 374 Unchecked, 1.3s Time] [2022-01-18 15:52:13,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16921 states. [2022-01-18 15:52:13,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16921 to 16303. [2022-01-18 15:52:13,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16303 states, 16302 states have (on average 4.6696110906637225) internal successors, (76124), 16302 states have internal predecessors, (76124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:52:13,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16303 states to 16303 states and 76124 transitions. [2022-01-18 15:52:13,529 INFO L78 Accepts]: Start accepts. Automaton has 16303 states and 76124 transitions. Word has length 33 [2022-01-18 15:52:13,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:52:13,529 INFO L470 AbstractCegarLoop]: Abstraction has 16303 states and 76124 transitions. [2022-01-18 15:52:13,529 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.3) internal successors, (69), 29 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 15:52:13,529 INFO L276 IsEmpty]: Start isEmpty. Operand 16303 states and 76124 transitions. [2022-01-18 15:52:13,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 15:52:13,571 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:52:13,571 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, 1, 1, 1, 1, 1] [2022-01-18 15:52:13,591 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (198)] Ended with exit code 0 [2022-01-18 15:52:13,774 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 198 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable201 [2022-01-18 15:52:13,775 INFO L402 AbstractCegarLoop]: === Iteration 203 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-01-18 15:52:13,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:52:13,775 INFO L85 PathProgramCache]: Analyzing trace with hash -1889539959, now seen corresponding path program 93 times [2022-01-18 15:52:13,775 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:52:13,775 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1354378713] [2022-01-18 15:52:13,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:52:13,775 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:52:13,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:52:13,933 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 15:52:13,934 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:52:13,934 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1354378713] [2022-01-18 15:52:13,934 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1354378713] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:52:13,934 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1667364539] [2022-01-18 15:52:13,934 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 15:52:13,934 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:52:13,934 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:52:13,935 INFO L229 MonitoredProcess]: Starting monitored process 199 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:52:13,935 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (199)] Waiting until timeout for monitored process [2022-01-18 15:52:13,964 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 15:52:13,964 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:52:13,965 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2022-01-18 15:52:13,965 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:52:14,299 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:52:14,299 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 3 new quantified variables, introduced 3 case distinctions, treesize of input 29 treesize of output 45 [2022-01-18 15:52:14,625 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 15:52:14,625 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:52:14,790 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:52:14,790 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 22 [2022-01-18 15:52:14,798 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:52:14,798 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 7 [2022-01-18 15:52:14,842 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 15:52:14,842 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1667364539] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:52:14,842 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:52:14,842 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 29 [2022-01-18 15:52:14,842 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [450773541] [2022-01-18 15:52:14,842 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:52:14,843 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-01-18 15:52:14,843 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:52:14,843 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-01-18 15:52:14,843 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=775, Unknown=0, NotChecked=0, Total=870 [2022-01-18 15:52:14,843 INFO L87 Difference]: Start difference. First operand 16303 states and 76124 transitions. Second operand has 30 states, 30 states have (on average 2.3) internal successors, (69), 29 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 15:52:16,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:52:16,354 INFO L93 Difference]: Finished difference Result 16888 states and 78327 transitions. [2022-01-18 15:52:16,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-01-18 15:52:16,355 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.3) internal successors, (69), 29 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 33 [2022-01-18 15:52:16,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:52:16,402 INFO L225 Difference]: With dead ends: 16888 [2022-01-18 15:52:16,403 INFO L226 Difference]: Without dead ends: 16860 [2022-01-18 15:52:16,403 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 47 SyntacticMatches, 5 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 541 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=234, Invalid=1836, Unknown=0, NotChecked=0, Total=2070 [2022-01-18 15:52:16,403 INFO L933 BasicCegarLoop]: 53 mSDtfsCounter, 406 mSDsluCounter, 1987 mSDsCounter, 0 mSdLazyCounter, 2602 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 406 SdHoareTripleChecker+Valid, 808 SdHoareTripleChecker+Invalid, 2883 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 2602 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 235 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-01-18 15:52:16,403 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [406 Valid, 808 Invalid, 2883 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 2602 Invalid, 0 Unknown, 235 Unchecked, 1.0s Time] [2022-01-18 15:52:16,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16860 states. [2022-01-18 15:52:16,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16860 to 16288. [2022-01-18 15:52:16,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16288 states, 16287 states have (on average 4.670043593049671) internal successors, (76061), 16287 states have internal predecessors, (76061), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:52:16,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16288 states to 16288 states and 76061 transitions. [2022-01-18 15:52:16,770 INFO L78 Accepts]: Start accepts. Automaton has 16288 states and 76061 transitions. Word has length 33 [2022-01-18 15:52:16,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:52:16,770 INFO L470 AbstractCegarLoop]: Abstraction has 16288 states and 76061 transitions. [2022-01-18 15:52:16,770 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.3) internal successors, (69), 29 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 15:52:16,770 INFO L276 IsEmpty]: Start isEmpty. Operand 16288 states and 76061 transitions. [2022-01-18 15:52:16,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 15:52:16,806 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:52:16,806 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, 1, 1, 1, 1, 1] [2022-01-18 15:52:16,822 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (199)] Ended with exit code 0 [2022-01-18 15:52:17,006 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 199 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable202 [2022-01-18 15:52:17,006 INFO L402 AbstractCegarLoop]: === Iteration 204 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-01-18 15:52:17,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:52:17,007 INFO L85 PathProgramCache]: Analyzing trace with hash -1963210305, now seen corresponding path program 94 times [2022-01-18 15:52:17,007 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:52:17,007 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [336354313] [2022-01-18 15:52:17,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:52:17,007 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:52:17,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:52:17,193 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 15:52:17,193 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:52:17,193 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [336354313] [2022-01-18 15:52:17,193 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [336354313] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:52:17,193 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1638017598] [2022-01-18 15:52:17,193 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 15:52:17,193 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:52:17,193 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:52:17,194 INFO L229 MonitoredProcess]: Starting monitored process 200 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:52:17,195 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (200)] Waiting until timeout for monitored process [2022-01-18 15:52:17,223 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 15:52:17,223 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:52:17,224 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2022-01-18 15:52:17,224 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:52:17,637 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:52:17,638 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 21 [2022-01-18 15:52:17,713 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 15:52:17,713 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:52:18,037 INFO L353 Elim1Store]: treesize reduction 36, result has 50.7 percent of original size [2022-01-18 15:52:18,037 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 27 treesize of output 48 [2022-01-18 15:52:18,096 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:52:18,097 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:52:18,097 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:52:18,098 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:52:18,098 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 27 treesize of output 7 [2022-01-18 15:52:18,144 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 15:52:18,144 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1638017598] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:52:18,144 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:52:18,144 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 32 [2022-01-18 15:52:18,145 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1891034744] [2022-01-18 15:52:18,145 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:52:18,145 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-01-18 15:52:18,145 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:52:18,145 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-01-18 15:52:18,145 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=970, Unknown=0, NotChecked=0, Total=1056 [2022-01-18 15:52:18,145 INFO L87 Difference]: Start difference. First operand 16288 states and 76061 transitions. Second operand has 33 states, 33 states have (on average 2.515151515151515) internal successors, (83), 32 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:52:20,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:52:20,973 INFO L93 Difference]: Finished difference Result 17247 states and 79590 transitions. [2022-01-18 15:52:20,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-01-18 15:52:20,973 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.515151515151515) internal successors, (83), 32 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 15:52:20,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:52:21,027 INFO L225 Difference]: With dead ends: 17247 [2022-01-18 15:52:21,027 INFO L226 Difference]: Without dead ends: 17104 [2022-01-18 15:52:21,028 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 43 SyntacticMatches, 4 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1095 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=375, Invalid=4455, Unknown=0, NotChecked=0, Total=4830 [2022-01-18 15:52:21,028 INFO L933 BasicCegarLoop]: 63 mSDtfsCounter, 457 mSDsluCounter, 3243 mSDsCounter, 0 mSdLazyCounter, 4258 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 457 SdHoareTripleChecker+Valid, 1341 SdHoareTripleChecker+Invalid, 4325 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 4258 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-01-18 15:52:21,028 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [457 Valid, 1341 Invalid, 4325 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 4258 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-01-18 15:52:21,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17104 states. [2022-01-18 15:52:21,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17104 to 16294. [2022-01-18 15:52:21,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16294 states, 16293 states have (on average 4.669367212913521) internal successors, (76078), 16293 states have internal predecessors, (76078), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:52:21,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16294 states to 16294 states and 76078 transitions. [2022-01-18 15:52:21,398 INFO L78 Accepts]: Start accepts. Automaton has 16294 states and 76078 transitions. Word has length 33 [2022-01-18 15:52:21,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:52:21,398 INFO L470 AbstractCegarLoop]: Abstraction has 16294 states and 76078 transitions. [2022-01-18 15:52:21,398 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.515151515151515) internal successors, (83), 32 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:52:21,398 INFO L276 IsEmpty]: Start isEmpty. Operand 16294 states and 76078 transitions. [2022-01-18 15:52:21,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 15:52:21,431 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:52:21,431 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, 1, 1, 1, 1, 1] [2022-01-18 15:52:21,446 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (200)] Ended with exit code 0 [2022-01-18 15:52:21,631 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable203,200 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:52:21,631 INFO L402 AbstractCegarLoop]: === Iteration 205 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-01-18 15:52:21,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:52:21,631 INFO L85 PathProgramCache]: Analyzing trace with hash -186109133, now seen corresponding path program 95 times [2022-01-18 15:52:21,632 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:52:21,632 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [16997712] [2022-01-18 15:52:21,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:52:21,632 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:52:21,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:52:21,792 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 15:52:21,792 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:52:21,792 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [16997712] [2022-01-18 15:52:21,792 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [16997712] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:52:21,792 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [595871105] [2022-01-18 15:52:21,792 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 15:52:21,792 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:52:21,792 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:52:21,793 INFO L229 MonitoredProcess]: Starting monitored process 201 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:52:21,795 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (201)] Waiting until timeout for monitored process [2022-01-18 15:52:21,823 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 15:52:21,823 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:52:21,823 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2022-01-18 15:52:21,824 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:52:22,167 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:52:22,168 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 37 treesize of output 21 [2022-01-18 15:52:22,274 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 15:52:22,275 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:52:22,521 INFO L353 Elim1Store]: treesize reduction 36, result has 50.7 percent of original size [2022-01-18 15:52:22,521 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 27 treesize of output 48 [2022-01-18 15:52:22,582 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:52:22,582 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:52:22,583 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:52:22,583 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:52:22,584 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 27 treesize of output 7 [2022-01-18 15:52:22,628 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 15:52:22,628 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [595871105] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:52:22,628 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:52:22,629 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 30 [2022-01-18 15:52:22,629 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2014327721] [2022-01-18 15:52:22,629 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:52:22,629 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-01-18 15:52:22,629 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:52:22,629 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-01-18 15:52:22,629 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=833, Unknown=0, NotChecked=0, Total=930 [2022-01-18 15:52:22,629 INFO L87 Difference]: Start difference. First operand 16294 states and 76078 transitions. Second operand has 31 states, 31 states have (on average 2.5483870967741935) internal successors, (79), 30 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:52:24,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:52:24,767 INFO L93 Difference]: Finished difference Result 17444 states and 80518 transitions. [2022-01-18 15:52:24,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-01-18 15:52:24,767 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.5483870967741935) internal successors, (79), 30 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 15:52:24,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:52:24,816 INFO L225 Difference]: With dead ends: 17444 [2022-01-18 15:52:24,817 INFO L226 Difference]: Without dead ends: 17339 [2022-01-18 15:52:24,817 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 45 SyntacticMatches, 4 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 875 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=316, Invalid=3224, Unknown=0, NotChecked=0, Total=3540 [2022-01-18 15:52:24,817 INFO L933 BasicCegarLoop]: 60 mSDtfsCounter, 550 mSDsluCounter, 2796 mSDsCounter, 0 mSdLazyCounter, 3603 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 550 SdHoareTripleChecker+Valid, 1114 SdHoareTripleChecker+Invalid, 3674 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 3603 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-01-18 15:52:24,817 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [550 Valid, 1114 Invalid, 3674 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 3603 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-01-18 15:52:24,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17339 states. [2022-01-18 15:52:25,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17339 to 16250. [2022-01-18 15:52:25,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16250 states, 16249 states have (on average 4.669641208689765) internal successors, (75877), 16249 states have internal predecessors, (75877), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:52:25,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16250 states to 16250 states and 75877 transitions. [2022-01-18 15:52:25,297 INFO L78 Accepts]: Start accepts. Automaton has 16250 states and 75877 transitions. Word has length 33 [2022-01-18 15:52:25,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:52:25,297 INFO L470 AbstractCegarLoop]: Abstraction has 16250 states and 75877 transitions. [2022-01-18 15:52:25,297 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.5483870967741935) internal successors, (79), 30 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:52:25,297 INFO L276 IsEmpty]: Start isEmpty. Operand 16250 states and 75877 transitions. [2022-01-18 15:52:25,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 15:52:25,331 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:52:25,331 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, 1, 1, 1, 1, 1] [2022-01-18 15:52:25,346 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (201)] Ended with exit code 0 [2022-01-18 15:52:25,531 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 201 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable204 [2022-01-18 15:52:25,531 INFO L402 AbstractCegarLoop]: === Iteration 206 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-01-18 15:52:25,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:52:25,532 INFO L85 PathProgramCache]: Analyzing trace with hash 1517085983, now seen corresponding path program 96 times [2022-01-18 15:52:25,532 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:52:25,532 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [365979369] [2022-01-18 15:52:25,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:52:25,532 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:52:25,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:52:25,698 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 15:52:25,698 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:52:25,698 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [365979369] [2022-01-18 15:52:25,699 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [365979369] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:52:25,699 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [296313082] [2022-01-18 15:52:25,699 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 15:52:25,699 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:52:25,699 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:52:25,700 INFO L229 MonitoredProcess]: Starting monitored process 202 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:52:25,700 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (202)] Waiting until timeout for monitored process [2022-01-18 15:52:25,728 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-01-18 15:52:25,729 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:52:25,729 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2022-01-18 15:52:25,730 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:52:26,034 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:52:26,054 INFO L353 Elim1Store]: treesize reduction 14, result has 72.5 percent of original size [2022-01-18 15:52:26,055 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 31 treesize of output 55 [2022-01-18 15:52:26,260 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 15:52:26,260 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:52:26,559 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 15:52:26,559 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [296313082] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:52:26,559 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:52:26,559 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 13] total 32 [2022-01-18 15:52:26,559 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2056229512] [2022-01-18 15:52:26,559 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:52:26,559 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-01-18 15:52:26,559 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:52:26,559 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-01-18 15:52:26,560 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=940, Unknown=0, NotChecked=0, Total=1056 [2022-01-18 15:52:26,560 INFO L87 Difference]: Start difference. First operand 16250 states and 75877 transitions. Second operand has 33 states, 33 states have (on average 2.4242424242424243) internal successors, (80), 32 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:52:31,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:52:31,146 INFO L93 Difference]: Finished difference Result 19660 states and 89347 transitions. [2022-01-18 15:52:31,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2022-01-18 15:52:31,147 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.4242424242424243) internal successors, (80), 32 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 15:52:31,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:52:31,207 INFO L225 Difference]: With dead ends: 19660 [2022-01-18 15:52:31,207 INFO L226 Difference]: Without dead ends: 19622 [2022-01-18 15:52:31,209 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 43 SyntacticMatches, 4 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2590 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=987, Invalid=7943, Unknown=0, NotChecked=0, Total=8930 [2022-01-18 15:52:31,209 INFO L933 BasicCegarLoop]: 75 mSDtfsCounter, 1188 mSDsluCounter, 4051 mSDsCounter, 0 mSdLazyCounter, 5578 mSolverCounterSat, 216 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1188 SdHoareTripleChecker+Valid, 1637 SdHoareTripleChecker+Invalid, 5794 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 216 IncrementalHoareTripleChecker+Valid, 5578 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-01-18 15:52:31,209 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1188 Valid, 1637 Invalid, 5794 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [216 Valid, 5578 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2022-01-18 15:52:31,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19622 states. [2022-01-18 15:52:31,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19622 to 16466. [2022-01-18 15:52:31,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16466 states, 16465 states have (on average 4.677862131794716) internal successors, (77021), 16465 states have internal predecessors, (77021), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:52:31,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16466 states to 16466 states and 77021 transitions. [2022-01-18 15:52:31,647 INFO L78 Accepts]: Start accepts. Automaton has 16466 states and 77021 transitions. Word has length 33 [2022-01-18 15:52:31,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:52:31,647 INFO L470 AbstractCegarLoop]: Abstraction has 16466 states and 77021 transitions. [2022-01-18 15:52:31,647 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.4242424242424243) internal successors, (80), 32 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:52:31,647 INFO L276 IsEmpty]: Start isEmpty. Operand 16466 states and 77021 transitions. [2022-01-18 15:52:31,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 15:52:31,683 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:52:31,683 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, 1, 1, 1, 1, 1] [2022-01-18 15:52:31,700 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (202)] Ended with exit code 0 [2022-01-18 15:52:31,883 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable205,202 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:52:31,884 INFO L402 AbstractCegarLoop]: === Iteration 207 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-01-18 15:52:31,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:52:31,884 INFO L85 PathProgramCache]: Analyzing trace with hash -1474608707, now seen corresponding path program 97 times [2022-01-18 15:52:31,884 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:52:31,884 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [577939563] [2022-01-18 15:52:31,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:52:31,884 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:52:31,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:52:32,063 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 15:52:32,064 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:52:32,064 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [577939563] [2022-01-18 15:52:32,064 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [577939563] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:52:32,064 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [6240555] [2022-01-18 15:52:32,064 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 15:52:32,064 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:52:32,064 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:52:32,065 INFO L229 MonitoredProcess]: Starting monitored process 203 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:52:32,065 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (203)] Waiting until timeout for monitored process [2022-01-18 15:52:32,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:52:32,096 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2022-01-18 15:52:32,097 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:52:32,515 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:52:32,515 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 37 treesize of output 21 [2022-01-18 15:52:32,630 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 15:52:32,630 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:52:32,866 INFO L353 Elim1Store]: treesize reduction 36, result has 50.7 percent of original size [2022-01-18 15:52:32,867 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 27 treesize of output 48 [2022-01-18 15:52:32,917 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:52:32,917 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:52:32,918 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:52:32,918 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:52:32,918 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 27 treesize of output 7 [2022-01-18 15:52:32,963 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 15:52:32,963 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [6240555] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:52:32,963 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:52:32,963 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 30 [2022-01-18 15:52:32,963 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [24557899] [2022-01-18 15:52:32,963 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:52:32,964 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-01-18 15:52:32,964 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:52:32,964 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-01-18 15:52:32,964 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=818, Unknown=0, NotChecked=0, Total=930 [2022-01-18 15:52:32,964 INFO L87 Difference]: Start difference. First operand 16466 states and 77021 transitions. Second operand has 31 states, 31 states have (on average 2.5483870967741935) internal successors, (79), 30 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:52:35,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:52:35,145 INFO L93 Difference]: Finished difference Result 18802 states and 86234 transitions. [2022-01-18 15:52:35,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-01-18 15:52:35,145 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.5483870967741935) internal successors, (79), 30 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 15:52:35,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:52:35,203 INFO L225 Difference]: With dead ends: 18802 [2022-01-18 15:52:35,204 INFO L226 Difference]: Without dead ends: 18773 [2022-01-18 15:52:35,204 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 45 SyntacticMatches, 4 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 856 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=360, Invalid=2946, Unknown=0, NotChecked=0, Total=3306 [2022-01-18 15:52:35,204 INFO L933 BasicCegarLoop]: 64 mSDtfsCounter, 685 mSDsluCounter, 2960 mSDsCounter, 0 mSdLazyCounter, 3471 mSolverCounterSat, 114 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 685 SdHoareTripleChecker+Valid, 1274 SdHoareTripleChecker+Invalid, 3936 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 114 IncrementalHoareTripleChecker+Valid, 3471 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 351 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-01-18 15:52:35,204 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [685 Valid, 1274 Invalid, 3936 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [114 Valid, 3471 Invalid, 0 Unknown, 351 Unchecked, 1.4s Time] [2022-01-18 15:52:35,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18773 states. [2022-01-18 15:52:35,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18773 to 16847. [2022-01-18 15:52:35,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16847 states, 16846 states have (on average 4.678499347026) internal successors, (78814), 16846 states have internal predecessors, (78814), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:52:35,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16847 states to 16847 states and 78814 transitions. [2022-01-18 15:52:35,622 INFO L78 Accepts]: Start accepts. Automaton has 16847 states and 78814 transitions. Word has length 33 [2022-01-18 15:52:35,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:52:35,622 INFO L470 AbstractCegarLoop]: Abstraction has 16847 states and 78814 transitions. [2022-01-18 15:52:35,622 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.5483870967741935) internal successors, (79), 30 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:52:35,622 INFO L276 IsEmpty]: Start isEmpty. Operand 16847 states and 78814 transitions. [2022-01-18 15:52:35,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 15:52:35,658 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:52:35,658 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, 1, 1, 1, 1, 1] [2022-01-18 15:52:35,673 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (203)] Ended with exit code 0 [2022-01-18 15:52:35,858 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 203 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable206 [2022-01-18 15:52:35,858 INFO L402 AbstractCegarLoop]: === Iteration 208 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-01-18 15:52:35,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:52:35,858 INFO L85 PathProgramCache]: Analyzing trace with hash -1527995227, now seen corresponding path program 98 times [2022-01-18 15:52:35,858 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:52:35,858 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [841114097] [2022-01-18 15:52:35,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:52:35,859 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:52:35,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:52:36,025 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 15:52:36,025 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:52:36,025 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [841114097] [2022-01-18 15:52:36,025 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [841114097] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:52:36,025 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1035411489] [2022-01-18 15:52:36,025 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 15:52:36,025 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:52:36,025 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:52:36,026 INFO L229 MonitoredProcess]: Starting monitored process 204 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:52:36,026 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (204)] Waiting until timeout for monitored process [2022-01-18 15:52:36,055 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:52:36,055 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:52:36,056 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2022-01-18 15:52:36,056 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:52:36,355 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:52:36,355 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 3 new quantified variables, introduced 3 case distinctions, treesize of input 29 treesize of output 45 [2022-01-18 15:52:36,765 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 15:52:36,765 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:52:36,936 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:52:36,936 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 22 [2022-01-18 15:52:36,946 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:52:36,946 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 7 [2022-01-18 15:52:36,993 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 15:52:36,993 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1035411489] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:52:36,993 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:52:36,993 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 29 [2022-01-18 15:52:36,993 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [26294552] [2022-01-18 15:52:36,993 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:52:36,993 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-01-18 15:52:36,993 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:52:36,994 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-01-18 15:52:36,994 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=757, Unknown=0, NotChecked=0, Total=870 [2022-01-18 15:52:36,994 INFO L87 Difference]: Start difference. First operand 16847 states and 78814 transitions. Second operand has 30 states, 30 states have (on average 2.2666666666666666) 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 15:52:38,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:52:38,286 INFO L93 Difference]: Finished difference Result 17471 states and 81218 transitions. [2022-01-18 15:52:38,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-01-18 15:52:38,287 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.2666666666666666) 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 33 [2022-01-18 15:52:38,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:52:38,337 INFO L225 Difference]: With dead ends: 17471 [2022-01-18 15:52:38,337 INFO L226 Difference]: Without dead ends: 17458 [2022-01-18 15:52:38,338 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 52 SyntacticMatches, 4 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 558 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=280, Invalid=1790, Unknown=0, NotChecked=0, Total=2070 [2022-01-18 15:52:38,338 INFO L933 BasicCegarLoop]: 58 mSDtfsCounter, 457 mSDsluCounter, 1896 mSDsCounter, 0 mSdLazyCounter, 2136 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 457 SdHoareTripleChecker+Valid, 775 SdHoareTripleChecker+Invalid, 2636 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 2136 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 436 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-18 15:52:38,338 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [457 Valid, 775 Invalid, 2636 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 2136 Invalid, 0 Unknown, 436 Unchecked, 0.8s Time] [2022-01-18 15:52:38,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17458 states. [2022-01-18 15:52:38,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17458 to 16865. [2022-01-18 15:52:38,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16865 states, 16864 states have (on average 4.6767670777988615) internal successors, (78869), 16864 states have internal predecessors, (78869), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:52:38,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16865 states to 16865 states and 78869 transitions. [2022-01-18 15:52:38,769 INFO L78 Accepts]: Start accepts. Automaton has 16865 states and 78869 transitions. Word has length 33 [2022-01-18 15:52:38,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:52:38,769 INFO L470 AbstractCegarLoop]: Abstraction has 16865 states and 78869 transitions. [2022-01-18 15:52:38,769 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.2666666666666666) 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 15:52:38,769 INFO L276 IsEmpty]: Start isEmpty. Operand 16865 states and 78869 transitions. [2022-01-18 15:52:38,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 15:52:38,804 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:52:38,804 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, 1, 1, 1, 1, 1] [2022-01-18 15:52:38,818 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (204)] Ended with exit code 0 [2022-01-18 15:52:39,004 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 204 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable207 [2022-01-18 15:52:39,004 INFO L402 AbstractCegarLoop]: === Iteration 209 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-01-18 15:52:39,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:52:39,005 INFO L85 PathProgramCache]: Analyzing trace with hash 970020710, now seen corresponding path program 14 times [2022-01-18 15:52:39,005 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:52:39,005 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1325350567] [2022-01-18 15:52:39,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:52:39,005 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:52:39,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:52:39,169 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 15:52:39,169 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:52:39,169 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1325350567] [2022-01-18 15:52:39,169 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1325350567] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:52:39,170 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [735275835] [2022-01-18 15:52:39,170 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 15:52:39,170 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:52:39,170 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:52:39,170 INFO L229 MonitoredProcess]: Starting monitored process 205 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:52:39,171 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (205)] Waiting until timeout for monitored process [2022-01-18 15:52:39,201 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:52:39,201 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:52:39,202 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2022-01-18 15:52:39,202 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:52:39,494 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:52:39,494 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 31 treesize of output 47 [2022-01-18 15:52:39,898 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 15:52:39,898 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:52:40,072 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:52:40,073 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 22 [2022-01-18 15:52:40,082 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:52:40,082 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 7 [2022-01-18 15:52:40,128 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 15:52:40,128 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [735275835] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:52:40,128 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:52:40,128 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 29 [2022-01-18 15:52:40,128 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [802902066] [2022-01-18 15:52:40,128 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:52:40,128 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-01-18 15:52:40,129 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:52:40,129 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-01-18 15:52:40,129 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=757, Unknown=0, NotChecked=0, Total=870 [2022-01-18 15:52:40,129 INFO L87 Difference]: Start difference. First operand 16865 states and 78869 transitions. Second operand has 30 states, 30 states have (on average 2.2666666666666666) 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 15:52:41,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:52:41,626 INFO L93 Difference]: Finished difference Result 17530 states and 81382 transitions. [2022-01-18 15:52:41,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-01-18 15:52:41,627 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.2666666666666666) 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 33 [2022-01-18 15:52:41,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:52:41,699 INFO L225 Difference]: With dead ends: 17530 [2022-01-18 15:52:41,699 INFO L226 Difference]: Without dead ends: 17523 [2022-01-18 15:52:41,699 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 49 SyntacticMatches, 4 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 617 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=280, Invalid=1976, Unknown=0, NotChecked=0, Total=2256 [2022-01-18 15:52:41,700 INFO L933 BasicCegarLoop]: 58 mSDtfsCounter, 480 mSDsluCounter, 2309 mSDsCounter, 0 mSdLazyCounter, 2495 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 480 SdHoareTripleChecker+Valid, 938 SdHoareTripleChecker+Invalid, 3270 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 2495 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 727 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-18 15:52:41,700 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [480 Valid, 938 Invalid, 3270 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 2495 Invalid, 0 Unknown, 727 Unchecked, 0.9s Time] [2022-01-18 15:52:41,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17523 states. [2022-01-18 15:52:42,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17523 to 16876. [2022-01-18 15:52:42,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16876 states, 16875 states have (on average 4.675318518518519) internal successors, (78896), 16875 states have internal predecessors, (78896), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:52:42,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16876 states to 16876 states and 78896 transitions. [2022-01-18 15:52:42,108 INFO L78 Accepts]: Start accepts. Automaton has 16876 states and 78896 transitions. Word has length 33 [2022-01-18 15:52:42,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:52:42,108 INFO L470 AbstractCegarLoop]: Abstraction has 16876 states and 78896 transitions. [2022-01-18 15:52:42,108 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.2666666666666666) 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 15:52:42,108 INFO L276 IsEmpty]: Start isEmpty. Operand 16876 states and 78896 transitions. [2022-01-18 15:52:42,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 15:52:42,147 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:52:42,147 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, 1, 1, 1, 1, 1] [2022-01-18 15:52:42,163 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (205)] Ended with exit code 0 [2022-01-18 15:52:42,347 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable208,205 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:52:42,347 INFO L402 AbstractCegarLoop]: === Iteration 210 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-01-18 15:52:42,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:52:42,348 INFO L85 PathProgramCache]: Analyzing trace with hash -192426458, now seen corresponding path program 15 times [2022-01-18 15:52:42,348 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:52:42,348 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [752681621] [2022-01-18 15:52:42,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:52:42,348 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:52:42,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:52:42,521 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 15:52:42,521 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:52:42,521 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [752681621] [2022-01-18 15:52:42,521 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [752681621] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:52:42,522 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [664692124] [2022-01-18 15:52:42,522 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 15:52:42,522 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:52:42,522 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:52:42,523 INFO L229 MonitoredProcess]: Starting monitored process 206 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:52:42,523 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (206)] Waiting until timeout for monitored process [2022-01-18 15:52:42,552 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-01-18 15:52:42,552 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:52:42,553 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 43 conjunts are in the unsatisfiable core [2022-01-18 15:52:42,554 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:52:42,863 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:52:42,884 INFO L353 Elim1Store]: treesize reduction 12, result has 76.5 percent of original size [2022-01-18 15:52:42,884 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 33 treesize of output 59 [2022-01-18 15:52:43,087 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 15:52:43,087 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:52:43,351 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 15:52:43,352 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [664692124] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:52:43,352 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:52:43,352 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 12] total 31 [2022-01-18 15:52:43,352 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1843925202] [2022-01-18 15:52:43,352 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:52:43,352 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-01-18 15:52:43,352 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:52:43,352 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-01-18 15:52:43,352 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=875, Unknown=0, NotChecked=0, Total=992 [2022-01-18 15:52:43,352 INFO L87 Difference]: Start difference. First operand 16876 states and 78896 transitions. Second operand has 32 states, 32 states have (on average 2.5) internal successors, (80), 31 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:52:47,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:52:47,435 INFO L93 Difference]: Finished difference Result 19651 states and 89482 transitions. [2022-01-18 15:52:47,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2022-01-18 15:52:47,435 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.5) internal successors, (80), 31 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 15:52:47,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:52:47,507 INFO L225 Difference]: With dead ends: 19651 [2022-01-18 15:52:47,507 INFO L226 Difference]: Without dead ends: 19625 [2022-01-18 15:52:47,507 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 44 SyntacticMatches, 4 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2038 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=837, Invalid=6303, Unknown=0, NotChecked=0, Total=7140 [2022-01-18 15:52:47,508 INFO L933 BasicCegarLoop]: 76 mSDtfsCounter, 1004 mSDsluCounter, 3918 mSDsCounter, 0 mSdLazyCounter, 5306 mSolverCounterSat, 205 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1004 SdHoareTripleChecker+Valid, 1607 SdHoareTripleChecker+Invalid, 5511 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 205 IncrementalHoareTripleChecker+Valid, 5306 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:52:47,508 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1004 Valid, 1607 Invalid, 5511 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [205 Valid, 5306 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2022-01-18 15:52:47,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19625 states. [2022-01-18 15:52:47,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19625 to 16876. [2022-01-18 15:52:47,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16876 states, 16875 states have (on average 4.677688888888889) internal successors, (78936), 16875 states have internal predecessors, (78936), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:52:47,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16876 states to 16876 states and 78936 transitions. [2022-01-18 15:52:47,978 INFO L78 Accepts]: Start accepts. Automaton has 16876 states and 78936 transitions. Word has length 33 [2022-01-18 15:52:47,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:52:47,978 INFO L470 AbstractCegarLoop]: Abstraction has 16876 states and 78936 transitions. [2022-01-18 15:52:47,978 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.5) internal successors, (80), 31 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:52:47,978 INFO L276 IsEmpty]: Start isEmpty. Operand 16876 states and 78936 transitions. [2022-01-18 15:52:48,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 15:52:48,015 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:52:48,015 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, 1, 1, 1, 1, 1] [2022-01-18 15:52:48,031 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (206)] Forceful destruction successful, exit code 0 [2022-01-18 15:52:48,215 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable209,206 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:52:48,216 INFO L402 AbstractCegarLoop]: === Iteration 211 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-01-18 15:52:48,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:52:48,216 INFO L85 PathProgramCache]: Analyzing trace with hash -1903053167, now seen corresponding path program 99 times [2022-01-18 15:52:48,216 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:52:48,216 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1685605267] [2022-01-18 15:52:48,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:52:48,216 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:52:48,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:52:48,400 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 15:52:48,400 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:52:48,400 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1685605267] [2022-01-18 15:52:48,401 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1685605267] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:52:48,401 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [995053239] [2022-01-18 15:52:48,401 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 15:52:48,401 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:52:48,401 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:52:48,402 INFO L229 MonitoredProcess]: Starting monitored process 207 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:52:48,402 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (207)] Waiting until timeout for monitored process [2022-01-18 15:52:48,433 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-01-18 15:52:48,433 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:52:48,434 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 43 conjunts are in the unsatisfiable core [2022-01-18 15:52:48,434 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:52:48,738 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:52:48,759 INFO L353 Elim1Store]: treesize reduction 12, result has 76.5 percent of original size [2022-01-18 15:52:48,759 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 33 treesize of output 59 [2022-01-18 15:52:48,983 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 15:52:48,983 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:52:49,278 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 15:52:49,278 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [995053239] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:52:49,278 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:52:49,278 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 13] total 32 [2022-01-18 15:52:49,278 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1183989665] [2022-01-18 15:52:49,278 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:52:49,278 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-01-18 15:52:49,278 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:52:49,278 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-01-18 15:52:49,279 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=940, Unknown=0, NotChecked=0, Total=1056 [2022-01-18 15:52:49,279 INFO L87 Difference]: Start difference. First operand 16876 states and 78936 transitions. Second operand has 33 states, 33 states have (on average 2.393939393939394) internal successors, (79), 32 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:52:53,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:52:53,749 INFO L93 Difference]: Finished difference Result 19762 states and 90087 transitions. [2022-01-18 15:52:53,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2022-01-18 15:52:53,749 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.393939393939394) internal successors, (79), 32 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 15:52:53,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:52:53,809 INFO L225 Difference]: With dead ends: 19762 [2022-01-18 15:52:53,809 INFO L226 Difference]: Without dead ends: 19713 [2022-01-18 15:52:53,810 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 43 SyntacticMatches, 4 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2435 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=833, Invalid=7539, Unknown=0, NotChecked=0, Total=8372 [2022-01-18 15:52:53,810 INFO L933 BasicCegarLoop]: 92 mSDtfsCounter, 1127 mSDsluCounter, 4343 mSDsCounter, 0 mSdLazyCounter, 5892 mSolverCounterSat, 220 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1127 SdHoareTripleChecker+Valid, 1797 SdHoareTripleChecker+Invalid, 6112 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 220 IncrementalHoareTripleChecker+Valid, 5892 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2022-01-18 15:52:53,810 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1127 Valid, 1797 Invalid, 6112 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [220 Valid, 5892 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2022-01-18 15:52:53,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19713 states. [2022-01-18 15:52:54,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19713 to 16775. [2022-01-18 15:52:54,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16775 states, 16774 states have (on average 4.678848217479432) internal successors, (78483), 16774 states have internal predecessors, (78483), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:52:54,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16775 states to 16775 states and 78483 transitions. [2022-01-18 15:52:54,235 INFO L78 Accepts]: Start accepts. Automaton has 16775 states and 78483 transitions. Word has length 33 [2022-01-18 15:52:54,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:52:54,235 INFO L470 AbstractCegarLoop]: Abstraction has 16775 states and 78483 transitions. [2022-01-18 15:52:54,236 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.393939393939394) internal successors, (79), 32 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:52:54,236 INFO L276 IsEmpty]: Start isEmpty. Operand 16775 states and 78483 transitions. [2022-01-18 15:52:54,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 15:52:54,272 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:52:54,273 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, 1, 1, 1, 1, 1] [2022-01-18 15:52:54,288 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (207)] Forceful destruction successful, exit code 0 [2022-01-18 15:52:54,473 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 207 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable210 [2022-01-18 15:52:54,473 INFO L402 AbstractCegarLoop]: === Iteration 212 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-01-18 15:52:54,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:52:54,473 INFO L85 PathProgramCache]: Analyzing trace with hash 534833869, now seen corresponding path program 100 times [2022-01-18 15:52:54,473 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:52:54,473 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [488577298] [2022-01-18 15:52:54,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:52:54,474 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:52:54,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:52:54,650 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 15:52:54,650 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:52:54,650 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [488577298] [2022-01-18 15:52:54,650 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [488577298] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:52:54,650 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [568754947] [2022-01-18 15:52:54,650 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 15:52:54,650 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:52:54,650 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:52:54,651 INFO L229 MonitoredProcess]: Starting monitored process 208 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:52:54,652 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (208)] Waiting until timeout for monitored process [2022-01-18 15:52:54,682 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 15:52:54,682 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:52:54,683 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2022-01-18 15:52:54,684 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:52:55,050 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:52:55,051 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 15 [2022-01-18 15:52:55,172 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 15:52:55,172 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:52:55,466 INFO L353 Elim1Store]: treesize reduction 36, result has 50.7 percent of original size [2022-01-18 15:52:55,466 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 27 treesize of output 48 [2022-01-18 15:52:55,529 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:52:55,530 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:52:55,531 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:52:55,531 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:52:55,532 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 27 treesize of output 7 [2022-01-18 15:52:55,583 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 15:52:55,583 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [568754947] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:52:55,583 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:52:55,583 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 31 [2022-01-18 15:52:55,583 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1283850604] [2022-01-18 15:52:55,583 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:52:55,584 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-01-18 15:52:55,584 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:52:55,584 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-01-18 15:52:55,584 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=894, Unknown=0, NotChecked=0, Total=992 [2022-01-18 15:52:55,584 INFO L87 Difference]: Start difference. First operand 16775 states and 78483 transitions. Second operand has 32 states, 32 states have (on average 2.53125) internal successors, (81), 31 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:52:58,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:52:58,479 INFO L93 Difference]: Finished difference Result 18069 states and 83556 transitions. [2022-01-18 15:52:58,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2022-01-18 15:52:58,479 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.53125) internal successors, (81), 31 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 15:52:58,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:52:58,533 INFO L225 Difference]: With dead ends: 18069 [2022-01-18 15:52:58,533 INFO L226 Difference]: Without dead ends: 18033 [2022-01-18 15:52:58,534 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 44 SyntacticMatches, 4 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1196 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=457, Invalid=4235, Unknown=0, NotChecked=0, Total=4692 [2022-01-18 15:52:58,534 INFO L933 BasicCegarLoop]: 64 mSDtfsCounter, 588 mSDsluCounter, 2999 mSDsCounter, 0 mSdLazyCounter, 4014 mSolverCounterSat, 129 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 588 SdHoareTripleChecker+Valid, 1278 SdHoareTripleChecker+Invalid, 4143 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 129 IncrementalHoareTripleChecker+Valid, 4014 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-01-18 15:52:58,534 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [588 Valid, 1278 Invalid, 4143 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [129 Valid, 4014 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-01-18 15:52:58,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18033 states. [2022-01-18 15:52:58,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18033 to 16775. [2022-01-18 15:52:58,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16775 states, 16774 states have (on average 4.678848217479432) internal successors, (78483), 16774 states have internal predecessors, (78483), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:52:58,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16775 states to 16775 states and 78483 transitions. [2022-01-18 15:52:58,902 INFO L78 Accepts]: Start accepts. Automaton has 16775 states and 78483 transitions. Word has length 33 [2022-01-18 15:52:58,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:52:58,902 INFO L470 AbstractCegarLoop]: Abstraction has 16775 states and 78483 transitions. [2022-01-18 15:52:58,902 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.53125) internal successors, (81), 31 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:52:58,902 INFO L276 IsEmpty]: Start isEmpty. Operand 16775 states and 78483 transitions. [2022-01-18 15:52:58,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 15:52:58,935 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:52:58,935 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, 1, 1, 1, 1, 1] [2022-01-18 15:52:58,950 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (208)] Forceful destruction successful, exit code 0 [2022-01-18 15:52:59,135 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 208 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable211 [2022-01-18 15:52:59,136 INFO L402 AbstractCegarLoop]: === Iteration 213 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-01-18 15:52:59,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:52:59,136 INFO L85 PathProgramCache]: Analyzing trace with hash 181694379, now seen corresponding path program 101 times [2022-01-18 15:52:59,136 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:52:59,136 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1834616847] [2022-01-18 15:52:59,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:52:59,136 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:52:59,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:52:59,375 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 15:52:59,375 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:52:59,375 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1834616847] [2022-01-18 15:52:59,375 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1834616847] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:52:59,375 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [410617178] [2022-01-18 15:52:59,375 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 15:52:59,375 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:52:59,375 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:52:59,383 INFO L229 MonitoredProcess]: Starting monitored process 209 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:52:59,384 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (209)] Waiting until timeout for monitored process [2022-01-18 15:52:59,412 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-01-18 15:52:59,412 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:52:59,412 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 43 conjunts are in the unsatisfiable core [2022-01-18 15:52:59,413 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:52:59,740 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:52:59,741 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:52:59,741 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:52:59,742 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 33 treesize of output 19 [2022-01-18 15:52:59,863 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 15:52:59,863 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:53:00,107 INFO L353 Elim1Store]: treesize reduction 36, result has 50.7 percent of original size [2022-01-18 15:53:00,107 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 27 treesize of output 48 [2022-01-18 15:53:00,162 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:53:00,162 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:53:00,163 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:53:00,163 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:53:00,163 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 7 [2022-01-18 15:53:00,207 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 15:53:00,208 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [410617178] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:53:00,208 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:53:00,208 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 12] total 32 [2022-01-18 15:53:00,208 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [939978795] [2022-01-18 15:53:00,208 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:53:00,208 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-01-18 15:53:00,208 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:53:00,208 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-01-18 15:53:00,208 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=931, Unknown=0, NotChecked=0, Total=1056 [2022-01-18 15:53:00,208 INFO L87 Difference]: Start difference. First operand 16775 states and 78483 transitions. Second operand has 33 states, 33 states have (on average 2.4545454545454546) internal successors, (81), 32 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:53:03,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:53:03,245 INFO L93 Difference]: Finished difference Result 19190 states and 87841 transitions. [2022-01-18 15:53:03,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2022-01-18 15:53:03,246 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.4545454545454546) internal successors, (81), 32 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 15:53:03,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:53:03,301 INFO L225 Difference]: With dead ends: 19190 [2022-01-18 15:53:03,301 INFO L226 Difference]: Without dead ends: 19116 [2022-01-18 15:53:03,302 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 43 SyntacticMatches, 4 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1708 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=550, Invalid=5150, Unknown=0, NotChecked=0, Total=5700 [2022-01-18 15:53:03,302 INFO L933 BasicCegarLoop]: 80 mSDtfsCounter, 750 mSDsluCounter, 3225 mSDsCounter, 0 mSdLazyCounter, 4400 mSolverCounterSat, 165 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 750 SdHoareTripleChecker+Valid, 1399 SdHoareTripleChecker+Invalid, 4565 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 165 IncrementalHoareTripleChecker+Valid, 4400 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-01-18 15:53:03,302 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [750 Valid, 1399 Invalid, 4565 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [165 Valid, 4400 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-01-18 15:53:03,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19116 states. [2022-01-18 15:53:03,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19116 to 16775. [2022-01-18 15:53:03,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16775 states, 16774 states have (on average 4.684571360438774) internal successors, (78579), 16774 states have internal predecessors, (78579), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:53:03,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16775 states to 16775 states and 78579 transitions. [2022-01-18 15:53:03,697 INFO L78 Accepts]: Start accepts. Automaton has 16775 states and 78579 transitions. Word has length 33 [2022-01-18 15:53:03,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:53:03,698 INFO L470 AbstractCegarLoop]: Abstraction has 16775 states and 78579 transitions. [2022-01-18 15:53:03,698 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.4545454545454546) internal successors, (81), 32 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:53:03,698 INFO L276 IsEmpty]: Start isEmpty. Operand 16775 states and 78579 transitions. [2022-01-18 15:53:03,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 15:53:03,731 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:53:03,731 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, 1, 1, 1, 1, 1] [2022-01-18 15:53:03,746 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (209)] Forceful destruction successful, exit code 0 [2022-01-18 15:53:03,931 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 209 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable212 [2022-01-18 15:53:03,932 INFO L402 AbstractCegarLoop]: === Iteration 214 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-01-18 15:53:03,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:53:03,932 INFO L85 PathProgramCache]: Analyzing trace with hash -1675540629, now seen corresponding path program 102 times [2022-01-18 15:53:03,932 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:53:03,932 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [46568914] [2022-01-18 15:53:03,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:53:03,932 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:53:03,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:53:04,096 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 15:53:04,096 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:53:04,096 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [46568914] [2022-01-18 15:53:04,096 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [46568914] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:53:04,096 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [636186] [2022-01-18 15:53:04,096 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 15:53:04,096 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:53:04,096 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:53:04,097 INFO L229 MonitoredProcess]: Starting monitored process 210 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:53:04,097 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (210)] Waiting until timeout for monitored process [2022-01-18 15:53:04,127 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-01-18 15:53:04,127 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:53:04,128 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2022-01-18 15:53:04,128 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:53:04,430 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:53:04,450 INFO L353 Elim1Store]: treesize reduction 14, result has 72.5 percent of original size [2022-01-18 15:53:04,451 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 33 treesize of output 57 [2022-01-18 15:53:04,661 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 15:53:04,662 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:53:04,922 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 15:53:04,923 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [636186] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:53:04,923 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:53:04,923 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 12] total 31 [2022-01-18 15:53:04,923 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1445589864] [2022-01-18 15:53:04,923 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:53:04,923 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-01-18 15:53:04,923 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:53:04,923 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-01-18 15:53:04,923 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=881, Unknown=0, NotChecked=0, Total=992 [2022-01-18 15:53:04,924 INFO L87 Difference]: Start difference. First operand 16775 states and 78579 transitions. Second operand has 32 states, 32 states have (on average 2.4375) internal successors, (78), 31 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:53:08,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:53:08,766 INFO L93 Difference]: Finished difference Result 19035 states and 87325 transitions. [2022-01-18 15:53:08,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2022-01-18 15:53:08,766 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.4375) internal successors, (78), 31 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 15:53:08,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:53:08,823 INFO L225 Difference]: With dead ends: 19035 [2022-01-18 15:53:08,823 INFO L226 Difference]: Without dead ends: 19007 [2022-01-18 15:53:08,824 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 44 SyntacticMatches, 4 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2129 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=749, Invalid=6733, Unknown=0, NotChecked=0, Total=7482 [2022-01-18 15:53:08,824 INFO L933 BasicCegarLoop]: 80 mSDtfsCounter, 978 mSDsluCounter, 3609 mSDsCounter, 0 mSdLazyCounter, 4852 mSolverCounterSat, 224 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 978 SdHoareTripleChecker+Valid, 1515 SdHoareTripleChecker+Invalid, 5076 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 224 IncrementalHoareTripleChecker+Valid, 4852 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-01-18 15:53:08,824 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [978 Valid, 1515 Invalid, 5076 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [224 Valid, 4852 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2022-01-18 15:53:08,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19007 states. [2022-01-18 15:53:09,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19007 to 16766. [2022-01-18 15:53:09,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16766 states, 16765 states have (on average 4.684938860721742) internal successors, (78543), 16765 states have internal predecessors, (78543), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:53:09,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16766 states to 16766 states and 78543 transitions. [2022-01-18 15:53:09,216 INFO L78 Accepts]: Start accepts. Automaton has 16766 states and 78543 transitions. Word has length 33 [2022-01-18 15:53:09,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:53:09,216 INFO L470 AbstractCegarLoop]: Abstraction has 16766 states and 78543 transitions. [2022-01-18 15:53:09,216 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.4375) internal successors, (78), 31 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:53:09,216 INFO L276 IsEmpty]: Start isEmpty. Operand 16766 states and 78543 transitions. [2022-01-18 15:53:09,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 15:53:09,251 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:53:09,251 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, 1, 1, 1, 1, 1] [2022-01-18 15:53:09,266 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (210)] Ended with exit code 0 [2022-01-18 15:53:09,451 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 210 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable213 [2022-01-18 15:53:09,451 INFO L402 AbstractCegarLoop]: === Iteration 215 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-01-18 15:53:09,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:53:09,451 INFO L85 PathProgramCache]: Analyzing trace with hash -1684677661, now seen corresponding path program 103 times [2022-01-18 15:53:09,452 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:53:09,452 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1914337422] [2022-01-18 15:53:09,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:53:09,452 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:53:09,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:53:09,625 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 15:53:09,625 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:53:09,625 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1914337422] [2022-01-18 15:53:09,625 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1914337422] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:53:09,625 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [752616841] [2022-01-18 15:53:09,625 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 15:53:09,625 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:53:09,625 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:53:09,626 INFO L229 MonitoredProcess]: Starting monitored process 211 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:53:09,627 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (211)] Waiting until timeout for monitored process [2022-01-18 15:53:09,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:53:09,656 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2022-01-18 15:53:09,656 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:53:10,069 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:53:10,069 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 19 [2022-01-18 15:53:10,148 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 15:53:10,148 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:53:10,449 INFO L353 Elim1Store]: treesize reduction 36, result has 50.7 percent of original size [2022-01-18 15:53:10,449 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 27 treesize of output 48 [2022-01-18 15:53:10,506 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:53:10,506 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:53:10,507 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:53:10,507 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:53:10,508 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 27 treesize of output 7 [2022-01-18 15:53:10,552 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 15:53:10,552 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [752616841] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:53:10,552 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:53:10,552 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 32 [2022-01-18 15:53:10,552 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [765091078] [2022-01-18 15:53:10,552 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:53:10,552 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-01-18 15:53:10,552 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:53:10,553 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-01-18 15:53:10,553 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=971, Unknown=0, NotChecked=0, Total=1056 [2022-01-18 15:53:10,553 INFO L87 Difference]: Start difference. First operand 16766 states and 78543 transitions. Second operand has 33 states, 33 states have (on average 2.4545454545454546) internal successors, (81), 32 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:53:13,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:53:13,510 INFO L93 Difference]: Finished difference Result 18071 states and 83467 transitions. [2022-01-18 15:53:13,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2022-01-18 15:53:13,510 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.4545454545454546) internal successors, (81), 32 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 15:53:13,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:53:13,566 INFO L225 Difference]: With dead ends: 18071 [2022-01-18 15:53:13,566 INFO L226 Difference]: Without dead ends: 18036 [2022-01-18 15:53:13,567 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 43 SyntacticMatches, 4 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1196 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=398, Invalid=4714, Unknown=0, NotChecked=0, Total=5112 [2022-01-18 15:53:13,567 INFO L933 BasicCegarLoop]: 67 mSDtfsCounter, 517 mSDsluCounter, 3554 mSDsCounter, 0 mSdLazyCounter, 4589 mSolverCounterSat, 77 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 517 SdHoareTripleChecker+Valid, 1512 SdHoareTripleChecker+Invalid, 4934 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 4589 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 268 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-01-18 15:53:13,567 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [517 Valid, 1512 Invalid, 4934 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [77 Valid, 4589 Invalid, 0 Unknown, 268 Unchecked, 1.8s Time] [2022-01-18 15:53:13,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18036 states. [2022-01-18 15:53:13,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18036 to 16778. [2022-01-18 15:53:14,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16778 states, 16777 states have (on average 4.684508553376647) internal successors, (78592), 16777 states have internal predecessors, (78592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:53:14,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16778 states to 16778 states and 78592 transitions. [2022-01-18 15:53:14,064 INFO L78 Accepts]: Start accepts. Automaton has 16778 states and 78592 transitions. Word has length 33 [2022-01-18 15:53:14,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:53:14,064 INFO L470 AbstractCegarLoop]: Abstraction has 16778 states and 78592 transitions. [2022-01-18 15:53:14,064 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.4545454545454546) internal successors, (81), 32 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:53:14,064 INFO L276 IsEmpty]: Start isEmpty. Operand 16778 states and 78592 transitions. [2022-01-18 15:53:14,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 15:53:14,097 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:53:14,097 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, 1, 1, 1, 1, 1] [2022-01-18 15:53:14,115 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (211)] Forceful destruction successful, exit code 0 [2022-01-18 15:53:14,298 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 211 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable214 [2022-01-18 15:53:14,298 INFO L402 AbstractCegarLoop]: === Iteration 216 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-01-18 15:53:14,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:53:14,298 INFO L85 PathProgramCache]: Analyzing trace with hash 833944483, now seen corresponding path program 104 times [2022-01-18 15:53:14,298 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:53:14,298 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [441740805] [2022-01-18 15:53:14,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:53:14,299 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:53:14,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:53:14,479 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 15:53:14,479 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:53:14,479 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [441740805] [2022-01-18 15:53:14,479 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [441740805] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:53:14,480 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [863013313] [2022-01-18 15:53:14,480 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 15:53:14,480 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:53:14,480 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:53:14,481 INFO L229 MonitoredProcess]: Starting monitored process 212 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:53:14,482 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (212)] Waiting until timeout for monitored process [2022-01-18 15:53:14,511 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:53:14,511 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:53:14,512 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 42 conjunts are in the unsatisfiable core [2022-01-18 15:53:14,513 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:53:14,909 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:53:14,915 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:53:14,915 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 33 treesize of output 39 [2022-01-18 15:53:15,219 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 15:53:15,219 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:53:15,535 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:53:15,536 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 22 [2022-01-18 15:53:15,544 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:53:15,545 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 7 [2022-01-18 15:53:15,589 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 15:53:15,590 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [863013313] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:53:15,590 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:53:15,590 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 31 [2022-01-18 15:53:15,590 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [35344193] [2022-01-18 15:53:15,590 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:53:15,590 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-01-18 15:53:15,590 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:53:15,590 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-01-18 15:53:15,590 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=887, Unknown=0, NotChecked=0, Total=992 [2022-01-18 15:53:15,590 INFO L87 Difference]: Start difference. First operand 16778 states and 78592 transitions. Second operand has 32 states, 32 states have (on average 2.28125) internal successors, (73), 31 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:53:17,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:53:17,482 INFO L93 Difference]: Finished difference Result 17477 states and 81292 transitions. [2022-01-18 15:53:17,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-01-18 15:53:17,483 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.28125) internal successors, (73), 31 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 15:53:17,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:53:17,536 INFO L225 Difference]: With dead ends: 17477 [2022-01-18 15:53:17,536 INFO L226 Difference]: Without dead ends: 17465 [2022-01-18 15:53:17,536 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 43 SyntacticMatches, 5 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 846 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=329, Invalid=2863, Unknown=0, NotChecked=0, Total=3192 [2022-01-18 15:53:17,537 INFO L933 BasicCegarLoop]: 60 mSDtfsCounter, 570 mSDsluCounter, 1925 mSDsCounter, 0 mSdLazyCounter, 2383 mSolverCounterSat, 109 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 570 SdHoareTripleChecker+Valid, 867 SdHoareTripleChecker+Invalid, 2769 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 109 IncrementalHoareTripleChecker+Valid, 2383 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 277 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-01-18 15:53:17,537 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [570 Valid, 867 Invalid, 2769 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [109 Valid, 2383 Invalid, 0 Unknown, 277 Unchecked, 1.0s Time] [2022-01-18 15:53:17,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17465 states. [2022-01-18 15:53:17,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17465 to 16810. [2022-01-18 15:53:17,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16810 states, 16809 states have (on average 4.68314593372598) internal successors, (78719), 16809 states have internal predecessors, (78719), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:53:17,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16810 states to 16810 states and 78719 transitions. [2022-01-18 15:53:17,907 INFO L78 Accepts]: Start accepts. Automaton has 16810 states and 78719 transitions. Word has length 33 [2022-01-18 15:53:17,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:53:17,907 INFO L470 AbstractCegarLoop]: Abstraction has 16810 states and 78719 transitions. [2022-01-18 15:53:17,907 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.28125) internal successors, (73), 31 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:53:17,907 INFO L276 IsEmpty]: Start isEmpty. Operand 16810 states and 78719 transitions. [2022-01-18 15:53:17,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 15:53:17,943 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:53:17,943 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, 1, 1, 1, 1, 1] [2022-01-18 15:53:17,958 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (212)] Ended with exit code 0 [2022-01-18 15:53:18,143 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable215,212 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:53:18,144 INFO L402 AbstractCegarLoop]: === Iteration 217 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-01-18 15:53:18,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:53:18,144 INFO L85 PathProgramCache]: Analyzing trace with hash 637430978, now seen corresponding path program 3 times [2022-01-18 15:53:18,144 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:53:18,144 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [82460631] [2022-01-18 15:53:18,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:53:18,144 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:53:18,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:53:18,313 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 15:53:18,313 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:53:18,313 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [82460631] [2022-01-18 15:53:18,313 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [82460631] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:53:18,313 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [148511077] [2022-01-18 15:53:18,313 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 15:53:18,313 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:53:18,313 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:53:18,314 INFO L229 MonitoredProcess]: Starting monitored process 213 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:53:18,314 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (213)] Waiting until timeout for monitored process [2022-01-18 15:53:18,343 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-01-18 15:53:18,343 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:53:18,344 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 43 conjunts are in the unsatisfiable core [2022-01-18 15:53:18,344 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:53:18,704 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:53:18,725 INFO L353 Elim1Store]: treesize reduction 14, result has 74.5 percent of original size [2022-01-18 15:53:18,726 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 29 treesize of output 55 [2022-01-18 15:53:18,897 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 15:53:18,898 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:53:19,228 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 15:53:19,229 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [148511077] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:53:19,229 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:53:19,229 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 13] total 33 [2022-01-18 15:53:19,229 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [546006323] [2022-01-18 15:53:19,229 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:53:19,229 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-01-18 15:53:19,229 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:53:19,229 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-01-18 15:53:19,229 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=1005, Unknown=0, NotChecked=0, Total=1122 [2022-01-18 15:53:19,229 INFO L87 Difference]: Start difference. First operand 16810 states and 78719 transitions. Second operand has 34 states, 34 states have (on average 2.3823529411764706) internal successors, (81), 33 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:53:23,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:53:23,830 INFO L93 Difference]: Finished difference Result 19887 states and 90051 transitions. [2022-01-18 15:53:23,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2022-01-18 15:53:23,830 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.3823529411764706) internal successors, (81), 33 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 15:53:23,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:53:23,887 INFO L225 Difference]: With dead ends: 19887 [2022-01-18 15:53:23,887 INFO L226 Difference]: Without dead ends: 19858 [2022-01-18 15:53:23,888 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 43 SyntacticMatches, 3 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3247 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=1000, Invalid=9920, Unknown=0, NotChecked=0, Total=10920 [2022-01-18 15:53:23,888 INFO L933 BasicCegarLoop]: 86 mSDtfsCounter, 1111 mSDsluCounter, 3609 mSDsCounter, 0 mSdLazyCounter, 4855 mSolverCounterSat, 239 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1111 SdHoareTripleChecker+Valid, 1555 SdHoareTripleChecker+Invalid, 5094 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 239 IncrementalHoareTripleChecker+Valid, 4855 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:53:23,888 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1111 Valid, 1555 Invalid, 5094 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [239 Valid, 4855 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2022-01-18 15:53:23,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19858 states. [2022-01-18 15:53:24,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19858 to 16910. [2022-01-18 15:53:24,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16910 states, 16909 states have (on average 4.685906913478029) internal successors, (79234), 16909 states have internal predecessors, (79234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:53:24,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16910 states to 16910 states and 79234 transitions. [2022-01-18 15:53:24,314 INFO L78 Accepts]: Start accepts. Automaton has 16910 states and 79234 transitions. Word has length 33 [2022-01-18 15:53:24,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:53:24,315 INFO L470 AbstractCegarLoop]: Abstraction has 16910 states and 79234 transitions. [2022-01-18 15:53:24,315 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 2.3823529411764706) internal successors, (81), 33 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:53:24,315 INFO L276 IsEmpty]: Start isEmpty. Operand 16910 states and 79234 transitions. [2022-01-18 15:53:24,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 15:53:24,348 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:53:24,348 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, 1, 1, 1, 1, 1] [2022-01-18 15:53:24,363 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (213)] Ended with exit code 0 [2022-01-18 15:53:24,548 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable216,213 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:53:24,548 INFO L402 AbstractCegarLoop]: === Iteration 218 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-01-18 15:53:24,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:53:24,549 INFO L85 PathProgramCache]: Analyzing trace with hash 1300681963, now seen corresponding path program 105 times [2022-01-18 15:53:24,549 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:53:24,549 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [210602124] [2022-01-18 15:53:24,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:53:24,549 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:53:24,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:53:24,714 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 15:53:24,714 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:53:24,714 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [210602124] [2022-01-18 15:53:24,714 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [210602124] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:53:24,715 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [299893527] [2022-01-18 15:53:24,715 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 15:53:24,715 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:53:24,715 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:53:24,715 INFO L229 MonitoredProcess]: Starting monitored process 214 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:53:24,716 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (214)] Waiting until timeout for monitored process [2022-01-18 15:53:24,744 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-01-18 15:53:24,744 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:53:24,745 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 43 conjunts are in the unsatisfiable core [2022-01-18 15:53:24,745 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:53:25,170 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:53:25,190 INFO L353 Elim1Store]: treesize reduction 14, result has 72.5 percent of original size [2022-01-18 15:53:25,190 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 29 treesize of output 53 [2022-01-18 15:53:25,335 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 15:53:25,335 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:53:25,730 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 15:53:25,730 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [299893527] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:53:25,730 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:53:25,730 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 35 [2022-01-18 15:53:25,730 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [100747861] [2022-01-18 15:53:25,730 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:53:25,730 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-01-18 15:53:25,730 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:53:25,730 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-01-18 15:53:25,731 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=1154, Unknown=0, NotChecked=0, Total=1260 [2022-01-18 15:53:25,731 INFO L87 Difference]: Start difference. First operand 16910 states and 79234 transitions. Second operand has 36 states, 36 states have (on average 2.3333333333333335) internal successors, (84), 35 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:53:30,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:53:30,489 INFO L93 Difference]: Finished difference Result 18729 states and 85992 transitions. [2022-01-18 15:53:30,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2022-01-18 15:53:30,490 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.3333333333333335) internal successors, (84), 35 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 15:53:30,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:53:30,543 INFO L225 Difference]: With dead ends: 18729 [2022-01-18 15:53:30,543 INFO L226 Difference]: Without dead ends: 18699 [2022-01-18 15:53:30,544 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 41 SyntacticMatches, 3 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2079 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=660, Invalid=8270, Unknown=0, NotChecked=0, Total=8930 [2022-01-18 15:53:30,544 INFO L933 BasicCegarLoop]: 90 mSDtfsCounter, 826 mSDsluCounter, 4638 mSDsCounter, 0 mSdLazyCounter, 6257 mSolverCounterSat, 175 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 826 SdHoareTripleChecker+Valid, 1859 SdHoareTripleChecker+Invalid, 6432 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 175 IncrementalHoareTripleChecker+Valid, 6257 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2022-01-18 15:53:30,544 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [826 Valid, 1859 Invalid, 6432 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [175 Valid, 6257 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2022-01-18 15:53:30,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18699 states. [2022-01-18 15:53:30,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18699 to 16910. [2022-01-18 15:53:30,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16910 states, 16909 states have (on average 4.685966053580933) internal successors, (79235), 16909 states have internal predecessors, (79235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:53:30,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16910 states to 16910 states and 79235 transitions. [2022-01-18 15:53:30,934 INFO L78 Accepts]: Start accepts. Automaton has 16910 states and 79235 transitions. Word has length 33 [2022-01-18 15:53:30,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:53:30,934 INFO L470 AbstractCegarLoop]: Abstraction has 16910 states and 79235 transitions. [2022-01-18 15:53:30,934 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 2.3333333333333335) internal successors, (84), 35 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:53:30,934 INFO L276 IsEmpty]: Start isEmpty. Operand 16910 states and 79235 transitions. [2022-01-18 15:53:30,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 15:53:30,971 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:53:30,971 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, 1, 1, 1, 1, 1] [2022-01-18 15:53:30,986 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (214)] Forceful destruction successful, exit code 0 [2022-01-18 15:53:31,171 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 214 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable217 [2022-01-18 15:53:31,172 INFO L402 AbstractCegarLoop]: === Iteration 219 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-01-18 15:53:31,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:53:31,172 INFO L85 PathProgramCache]: Analyzing trace with hash -382321509, now seen corresponding path program 106 times [2022-01-18 15:53:31,172 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:53:31,172 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1266785548] [2022-01-18 15:53:31,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:53:31,172 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:53:31,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:53:31,344 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 15:53:31,344 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:53:31,344 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1266785548] [2022-01-18 15:53:31,344 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1266785548] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:53:31,344 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1734567340] [2022-01-18 15:53:31,345 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 15:53:31,345 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:53:31,345 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:53:31,345 INFO L229 MonitoredProcess]: Starting monitored process 215 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:53:31,346 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (215)] Waiting until timeout for monitored process [2022-01-18 15:53:31,373 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 15:53:31,374 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:53:31,374 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2022-01-18 15:53:31,375 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:53:31,699 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:53:31,700 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 15 [2022-01-18 15:53:31,808 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 15:53:31,808 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:53:32,074 INFO L353 Elim1Store]: treesize reduction 36, result has 50.7 percent of original size [2022-01-18 15:53:32,075 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 27 treesize of output 48 [2022-01-18 15:53:32,133 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:53:32,133 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:53:32,134 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:53:32,134 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:53:32,135 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 27 treesize of output 7 [2022-01-18 15:53:32,181 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 15:53:32,181 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1734567340] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:53:32,181 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:53:32,181 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 31 [2022-01-18 15:53:32,181 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [624450659] [2022-01-18 15:53:32,181 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:53:32,182 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-01-18 15:53:32,182 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:53:32,182 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-01-18 15:53:32,182 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=868, Unknown=0, NotChecked=0, Total=992 [2022-01-18 15:53:32,182 INFO L87 Difference]: Start difference. First operand 16910 states and 79235 transitions. Second operand has 32 states, 32 states have (on average 2.59375) internal successors, (83), 31 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:53:35,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:53:35,508 INFO L93 Difference]: Finished difference Result 21206 states and 97010 transitions. [2022-01-18 15:53:35,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2022-01-18 15:53:35,508 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.59375) internal successors, (83), 31 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 15:53:35,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:53:35,588 INFO L225 Difference]: With dead ends: 21206 [2022-01-18 15:53:35,588 INFO L226 Difference]: Without dead ends: 21120 [2022-01-18 15:53:35,589 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 44 SyntacticMatches, 4 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1886 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=742, Invalid=5738, Unknown=0, NotChecked=0, Total=6480 [2022-01-18 15:53:35,590 INFO L933 BasicCegarLoop]: 83 mSDtfsCounter, 811 mSDsluCounter, 3566 mSDsCounter, 0 mSdLazyCounter, 4854 mSolverCounterSat, 128 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 811 SdHoareTripleChecker+Valid, 1512 SdHoareTripleChecker+Invalid, 4982 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 128 IncrementalHoareTripleChecker+Valid, 4854 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-01-18 15:53:35,590 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [811 Valid, 1512 Invalid, 4982 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [128 Valid, 4854 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-01-18 15:53:35,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21120 states. [2022-01-18 15:53:36,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21120 to 17505. [2022-01-18 15:53:36,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17505 states, 17504 states have (on average 4.713722577696527) internal successors, (82509), 17504 states have internal predecessors, (82509), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:53:36,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17505 states to 17505 states and 82509 transitions. [2022-01-18 15:53:36,157 INFO L78 Accepts]: Start accepts. Automaton has 17505 states and 82509 transitions. Word has length 33 [2022-01-18 15:53:36,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:53:36,157 INFO L470 AbstractCegarLoop]: Abstraction has 17505 states and 82509 transitions. [2022-01-18 15:53:36,157 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.59375) internal successors, (83), 31 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:53:36,157 INFO L276 IsEmpty]: Start isEmpty. Operand 17505 states and 82509 transitions. [2022-01-18 15:53:36,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 15:53:36,192 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:53:36,192 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, 1, 1, 1, 1, 1] [2022-01-18 15:53:36,207 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (215)] Forceful destruction successful, exit code 0 [2022-01-18 15:53:36,393 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable218,215 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:53:36,393 INFO L402 AbstractCegarLoop]: === Iteration 220 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-01-18 15:53:36,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:53:36,393 INFO L85 PathProgramCache]: Analyzing trace with hash 920951097, now seen corresponding path program 107 times [2022-01-18 15:53:36,393 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:53:36,394 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [855580983] [2022-01-18 15:53:36,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:53:36,394 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:53:36,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:53:36,555 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 15:53:36,555 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:53:36,556 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [855580983] [2022-01-18 15:53:36,556 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [855580983] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:53:36,556 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [873217334] [2022-01-18 15:53:36,556 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 15:53:36,556 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:53:36,556 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:53:36,557 INFO L229 MonitoredProcess]: Starting monitored process 216 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:53:36,557 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (216)] Waiting until timeout for monitored process [2022-01-18 15:53:36,585 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-01-18 15:53:36,586 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:53:36,586 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2022-01-18 15:53:36,587 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:53:36,899 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:53:36,900 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 33 treesize of output 17 [2022-01-18 15:53:37,016 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 15:53:37,016 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:53:37,245 INFO L353 Elim1Store]: treesize reduction 36, result has 50.7 percent of original size [2022-01-18 15:53:37,245 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 27 treesize of output 48 [2022-01-18 15:53:37,303 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:53:37,303 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:53:37,304 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:53:37,304 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:53:37,305 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 27 treesize of output 7 [2022-01-18 15:53:37,349 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 15:53:37,349 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [873217334] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:53:37,349 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:53:37,349 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 30 [2022-01-18 15:53:37,349 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [70834836] [2022-01-18 15:53:37,349 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:53:37,349 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-01-18 15:53:37,349 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:53:37,349 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-01-18 15:53:37,350 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=810, Unknown=0, NotChecked=0, Total=930 [2022-01-18 15:53:37,350 INFO L87 Difference]: Start difference. First operand 17505 states and 82509 transitions. Second operand has 31 states, 31 states have (on average 2.5483870967741935) internal successors, (79), 30 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:53:39,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:53:39,972 INFO L93 Difference]: Finished difference Result 20890 states and 95605 transitions. [2022-01-18 15:53:39,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2022-01-18 15:53:39,972 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.5483870967741935) internal successors, (79), 30 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 15:53:39,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:53:40,045 INFO L225 Difference]: With dead ends: 20890 [2022-01-18 15:53:40,045 INFO L226 Difference]: Without dead ends: 20781 [2022-01-18 15:53:40,046 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 45 SyntacticMatches, 4 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1397 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=584, Invalid=4386, Unknown=0, NotChecked=0, Total=4970 [2022-01-18 15:53:40,046 INFO L933 BasicCegarLoop]: 83 mSDtfsCounter, 735 mSDsluCounter, 2896 mSDsCounter, 0 mSdLazyCounter, 3817 mSolverCounterSat, 95 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 735 SdHoareTripleChecker+Valid, 1250 SdHoareTripleChecker+Invalid, 3912 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 95 IncrementalHoareTripleChecker+Valid, 3817 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-01-18 15:53:40,046 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [735 Valid, 1250 Invalid, 3912 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [95 Valid, 3817 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-01-18 15:53:40,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20781 states. [2022-01-18 15:53:40,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20781 to 17514. [2022-01-18 15:53:40,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17514 states, 17513 states have (on average 4.713812596356992) internal successors, (82553), 17513 states have internal predecessors, (82553), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:53:40,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17514 states to 17514 states and 82553 transitions. [2022-01-18 15:53:40,494 INFO L78 Accepts]: Start accepts. Automaton has 17514 states and 82553 transitions. Word has length 33 [2022-01-18 15:53:40,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:53:40,494 INFO L470 AbstractCegarLoop]: Abstraction has 17514 states and 82553 transitions. [2022-01-18 15:53:40,494 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.5483870967741935) internal successors, (79), 30 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:53:40,494 INFO L276 IsEmpty]: Start isEmpty. Operand 17514 states and 82553 transitions. [2022-01-18 15:53:40,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 15:53:40,530 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:53:40,530 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, 1, 1, 1, 1, 1] [2022-01-18 15:53:40,545 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (216)] Forceful destruction successful, exit code 0 [2022-01-18 15:53:40,730 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable219,216 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:53:40,730 INFO L402 AbstractCegarLoop]: === Iteration 221 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-01-18 15:53:40,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:53:40,730 INFO L85 PathProgramCache]: Analyzing trace with hash -1364573623, now seen corresponding path program 108 times [2022-01-18 15:53:40,731 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:53:40,731 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [105629855] [2022-01-18 15:53:40,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:53:40,731 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:53:40,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:53:40,905 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 15:53:40,905 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:53:40,905 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [105629855] [2022-01-18 15:53:40,905 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [105629855] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:53:40,906 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1987760582] [2022-01-18 15:53:40,906 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 15:53:40,906 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:53:40,906 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:53:40,907 INFO L229 MonitoredProcess]: Starting monitored process 217 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:53:40,918 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (217)] Waiting until timeout for monitored process [2022-01-18 15:53:40,946 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-01-18 15:53:40,946 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:53:40,946 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2022-01-18 15:53:40,947 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:53:41,258 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:53:41,279 INFO L353 Elim1Store]: treesize reduction 14, result has 72.5 percent of original size [2022-01-18 15:53:41,279 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 31 treesize of output 55 [2022-01-18 15:53:41,526 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 15:53:41,526 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:53:41,904 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 15:53:41,904 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1987760582] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:53:41,905 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:53:41,905 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 13] total 32 [2022-01-18 15:53:41,905 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [361167341] [2022-01-18 15:53:41,905 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:53:41,905 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-01-18 15:53:41,905 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:53:41,905 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-01-18 15:53:41,905 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=949, Unknown=0, NotChecked=0, Total=1056 [2022-01-18 15:53:41,905 INFO L87 Difference]: Start difference. First operand 17514 states and 82553 transitions. Second operand has 33 states, 33 states have (on average 2.393939393939394) internal successors, (79), 32 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:53:46,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:53:46,686 INFO L93 Difference]: Finished difference Result 20733 states and 96159 transitions. [2022-01-18 15:53:46,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2022-01-18 15:53:46,686 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.393939393939394) internal successors, (79), 32 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 15:53:46,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:53:46,750 INFO L225 Difference]: With dead ends: 20733 [2022-01-18 15:53:46,751 INFO L226 Difference]: Without dead ends: 20675 [2022-01-18 15:53:46,752 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 43 SyntacticMatches, 4 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2816 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=880, Invalid=9020, Unknown=0, NotChecked=0, Total=9900 [2022-01-18 15:53:46,752 INFO L933 BasicCegarLoop]: 97 mSDtfsCounter, 1051 mSDsluCounter, 4399 mSDsCounter, 0 mSdLazyCounter, 5924 mSolverCounterSat, 230 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1051 SdHoareTripleChecker+Valid, 1864 SdHoareTripleChecker+Invalid, 6154 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 230 IncrementalHoareTripleChecker+Valid, 5924 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2022-01-18 15:53:46,752 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1051 Valid, 1864 Invalid, 6154 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [230 Valid, 5924 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2022-01-18 15:53:46,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20675 states. [2022-01-18 15:53:47,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20675 to 17778. [2022-01-18 15:53:47,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17778 states, 17777 states have (on average 4.727850593463464) internal successors, (84047), 17777 states have internal predecessors, (84047), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:53:47,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17778 states to 17778 states and 84047 transitions. [2022-01-18 15:53:47,200 INFO L78 Accepts]: Start accepts. Automaton has 17778 states and 84047 transitions. Word has length 33 [2022-01-18 15:53:47,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:53:47,200 INFO L470 AbstractCegarLoop]: Abstraction has 17778 states and 84047 transitions. [2022-01-18 15:53:47,201 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.393939393939394) internal successors, (79), 32 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:53:47,201 INFO L276 IsEmpty]: Start isEmpty. Operand 17778 states and 84047 transitions. [2022-01-18 15:53:47,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 15:53:47,241 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:53:47,241 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, 1, 1, 1, 1, 1] [2022-01-18 15:53:47,256 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (217)] Ended with exit code 0 [2022-01-18 15:53:47,441 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable220,217 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:53:47,442 INFO L402 AbstractCegarLoop]: === Iteration 222 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-01-18 15:53:47,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:53:47,442 INFO L85 PathProgramCache]: Analyzing trace with hash 710882143, now seen corresponding path program 109 times [2022-01-18 15:53:47,442 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:53:47,442 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1862717036] [2022-01-18 15:53:47,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:53:47,442 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:53:47,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:53:47,616 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 15:53:47,616 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:53:47,616 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1862717036] [2022-01-18 15:53:47,617 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1862717036] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:53:47,617 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [31873222] [2022-01-18 15:53:47,617 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 15:53:47,617 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:53:47,617 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:53:47,618 INFO L229 MonitoredProcess]: Starting monitored process 218 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:53:47,618 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (218)] Waiting until timeout for monitored process [2022-01-18 15:53:47,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:53:47,646 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2022-01-18 15:53:47,647 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:53:48,064 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:53:48,064 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 35 treesize of output 19 [2022-01-18 15:53:48,138 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 15:53:48,138 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:53:48,435 INFO L353 Elim1Store]: treesize reduction 36, result has 50.7 percent of original size [2022-01-18 15:53:48,435 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 27 treesize of output 48 [2022-01-18 15:53:48,493 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:53:48,493 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:53:48,494 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:53:48,494 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:53:48,495 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 27 treesize of output 7 [2022-01-18 15:53:48,539 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 15:53:48,539 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [31873222] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:53:48,539 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:53:48,539 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 32 [2022-01-18 15:53:48,539 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2130683308] [2022-01-18 15:53:48,539 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:53:48,540 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-01-18 15:53:48,540 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:53:48,540 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-01-18 15:53:48,540 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=970, Unknown=0, NotChecked=0, Total=1056 [2022-01-18 15:53:48,540 INFO L87 Difference]: Start difference. First operand 17778 states and 84047 transitions. Second operand has 33 states, 33 states have (on average 2.4545454545454546) internal successors, (81), 32 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:53:52,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:53:52,483 INFO L93 Difference]: Finished difference Result 19986 states and 93007 transitions. [2022-01-18 15:53:52,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2022-01-18 15:53:52,483 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.4545454545454546) internal successors, (81), 32 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 15:53:52,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:53:52,542 INFO L225 Difference]: With dead ends: 19986 [2022-01-18 15:53:52,542 INFO L226 Difference]: Without dead ends: 19917 [2022-01-18 15:53:52,543 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 43 SyntacticMatches, 4 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1519 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=474, Invalid=5688, Unknown=0, NotChecked=0, Total=6162 [2022-01-18 15:53:52,543 INFO L933 BasicCegarLoop]: 87 mSDtfsCounter, 545 mSDsluCounter, 4795 mSDsCounter, 0 mSdLazyCounter, 6511 mSolverCounterSat, 97 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 545 SdHoareTripleChecker+Valid, 2017 SdHoareTripleChecker+Invalid, 6608 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 97 IncrementalHoareTripleChecker+Valid, 6511 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2022-01-18 15:53:52,543 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [545 Valid, 2017 Invalid, 6608 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [97 Valid, 6511 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2022-01-18 15:53:52,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19917 states. [2022-01-18 15:53:52,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19917 to 17834. [2022-01-18 15:53:52,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17834 states, 17833 states have (on average 4.734256715078787) internal successors, (84426), 17833 states have internal predecessors, (84426), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:53:52,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17834 states to 17834 states and 84426 transitions. [2022-01-18 15:53:52,936 INFO L78 Accepts]: Start accepts. Automaton has 17834 states and 84426 transitions. Word has length 33 [2022-01-18 15:53:52,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:53:52,936 INFO L470 AbstractCegarLoop]: Abstraction has 17834 states and 84426 transitions. [2022-01-18 15:53:52,936 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.4545454545454546) internal successors, (81), 32 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:53:52,936 INFO L276 IsEmpty]: Start isEmpty. Operand 17834 states and 84426 transitions. [2022-01-18 15:53:52,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 15:53:52,972 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:53:52,972 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, 1, 1, 1, 1, 1] [2022-01-18 15:53:52,987 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (218)] Forceful destruction successful, exit code 0 [2022-01-18 15:53:53,172 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 218 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable221 [2022-01-18 15:53:53,172 INFO L402 AbstractCegarLoop]: === Iteration 223 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-01-18 15:53:53,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:53:53,173 INFO L85 PathProgramCache]: Analyzing trace with hash -464058405, now seen corresponding path program 110 times [2022-01-18 15:53:53,173 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:53:53,173 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [542172854] [2022-01-18 15:53:53,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:53:53,173 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:53:53,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:53:53,351 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 15:53:53,351 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:53:53,351 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [542172854] [2022-01-18 15:53:53,351 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [542172854] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:53:53,351 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1658377184] [2022-01-18 15:53:53,351 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 15:53:53,351 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:53:53,351 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:53:53,353 INFO L229 MonitoredProcess]: Starting monitored process 219 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:53:53,353 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (219)] Waiting until timeout for monitored process [2022-01-18 15:53:53,380 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:53:53,380 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:53:53,381 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2022-01-18 15:53:53,381 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:53:53,635 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:53:53,635 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 3 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 49 [2022-01-18 15:53:54,403 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 15:53:54,403 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:53:54,634 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:53:54,634 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 22 [2022-01-18 15:53:54,643 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:53:54,647 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 7 [2022-01-18 15:53:54,693 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 15:53:54,694 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1658377184] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:53:54,694 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:53:54,694 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 31 [2022-01-18 15:53:54,694 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1678371341] [2022-01-18 15:53:54,694 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:53:54,694 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-01-18 15:53:54,694 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:53:54,694 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-01-18 15:53:54,694 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=872, Unknown=0, NotChecked=0, Total=992 [2022-01-18 15:53:54,694 INFO L87 Difference]: Start difference. First operand 17834 states and 84426 transitions. Second operand has 32 states, 32 states have (on average 2.25) internal successors, (72), 31 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:53:56,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:53:56,483 INFO L93 Difference]: Finished difference Result 18880 states and 88760 transitions. [2022-01-18 15:53:56,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-01-18 15:53:56,483 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.25) internal successors, (72), 31 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 15:53:56,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:53:56,541 INFO L225 Difference]: With dead ends: 18880 [2022-01-18 15:53:56,541 INFO L226 Difference]: Without dead ends: 18873 [2022-01-18 15:53:56,542 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 48 SyntacticMatches, 4 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 746 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=393, Invalid=2469, Unknown=0, NotChecked=0, Total=2862 [2022-01-18 15:53:56,542 INFO L933 BasicCegarLoop]: 52 mSDtfsCounter, 510 mSDsluCounter, 1947 mSDsCounter, 0 mSdLazyCounter, 2228 mSolverCounterSat, 124 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 510 SdHoareTripleChecker+Valid, 790 SdHoareTripleChecker+Invalid, 2789 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 124 IncrementalHoareTripleChecker+Valid, 2228 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 437 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-18 15:53:56,542 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [510 Valid, 790 Invalid, 2789 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [124 Valid, 2228 Invalid, 0 Unknown, 437 Unchecked, 0.9s Time] [2022-01-18 15:53:56,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18873 states. [2022-01-18 15:53:56,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18873 to 17919. [2022-01-18 15:53:56,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17919 states, 17918 states have (on average 4.732671057037615) internal successors, (84800), 17918 states have internal predecessors, (84800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:53:57,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17919 states to 17919 states and 84800 transitions. [2022-01-18 15:53:57,015 INFO L78 Accepts]: Start accepts. Automaton has 17919 states and 84800 transitions. Word has length 33 [2022-01-18 15:53:57,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:53:57,015 INFO L470 AbstractCegarLoop]: Abstraction has 17919 states and 84800 transitions. [2022-01-18 15:53:57,015 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.25) internal successors, (72), 31 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:53:57,015 INFO L276 IsEmpty]: Start isEmpty. Operand 17919 states and 84800 transitions. [2022-01-18 15:53:57,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 15:53:57,054 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:53:57,054 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, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:53:57,069 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (219)] Forceful destruction successful, exit code 0 [2022-01-18 15:53:57,254 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 219 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable222 [2022-01-18 15:53:57,254 INFO L402 AbstractCegarLoop]: === Iteration 224 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-01-18 15:53:57,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:53:57,255 INFO L85 PathProgramCache]: Analyzing trace with hash 902108661, now seen corresponding path program 111 times [2022-01-18 15:53:57,255 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:53:57,255 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1700699315] [2022-01-18 15:53:57,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:53:57,256 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:53:57,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:53:57,433 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 15:53:57,434 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:53:57,434 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1700699315] [2022-01-18 15:53:57,434 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1700699315] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:53:57,434 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1176109402] [2022-01-18 15:53:57,434 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 15:53:57,434 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:53:57,434 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:53:57,435 INFO L229 MonitoredProcess]: Starting monitored process 220 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:53:57,435 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (220)] Waiting until timeout for monitored process [2022-01-18 15:53:57,464 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-01-18 15:53:57,464 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:53:57,465 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 43 conjunts are in the unsatisfiable core [2022-01-18 15:53:57,466 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:53:57,721 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:53:57,741 INFO L353 Elim1Store]: treesize reduction 14, result has 72.5 percent of original size [2022-01-18 15:53:57,741 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 33 treesize of output 57 [2022-01-18 15:53:58,012 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 15:53:58,012 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:53:58,312 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 15:53:58,312 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1176109402] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:53:58,312 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:53:58,312 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 13] total 32 [2022-01-18 15:53:58,312 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1220185503] [2022-01-18 15:53:58,312 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:53:58,312 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-01-18 15:53:58,312 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:53:58,313 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-01-18 15:53:58,313 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=932, Unknown=0, NotChecked=0, Total=1056 [2022-01-18 15:53:58,313 INFO L87 Difference]: Start difference. First operand 17919 states and 84800 transitions. Second operand has 33 states, 33 states have (on average 2.3636363636363638) internal successors, (78), 32 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:54:03,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:54:03,226 INFO L93 Difference]: Finished difference Result 22258 states and 102848 transitions. [2022-01-18 15:54:03,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2022-01-18 15:54:03,226 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.3636363636363638) internal successors, (78), 32 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 15:54:03,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:54:03,292 INFO L225 Difference]: With dead ends: 22258 [2022-01-18 15:54:03,292 INFO L226 Difference]: Without dead ends: 22188 [2022-01-18 15:54:03,293 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 43 SyntacticMatches, 4 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2710 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=1041, Invalid=8271, Unknown=0, NotChecked=0, Total=9312 [2022-01-18 15:54:03,293 INFO L933 BasicCegarLoop]: 82 mSDtfsCounter, 1104 mSDsluCounter, 3734 mSDsCounter, 0 mSdLazyCounter, 5163 mSolverCounterSat, 248 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1104 SdHoareTripleChecker+Valid, 1523 SdHoareTripleChecker+Invalid, 5411 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 248 IncrementalHoareTripleChecker+Valid, 5163 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:54:03,293 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1104 Valid, 1523 Invalid, 5411 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [248 Valid, 5163 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2022-01-18 15:54:03,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22188 states. [2022-01-18 15:54:03,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22188 to 18428. [2022-01-18 15:54:03,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18428 states, 18427 states have (on average 4.755521788679655) internal successors, (87630), 18427 states have internal predecessors, (87630), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:54:03,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18428 states to 18428 states and 87630 transitions. [2022-01-18 15:54:03,845 INFO L78 Accepts]: Start accepts. Automaton has 18428 states and 87630 transitions. Word has length 33 [2022-01-18 15:54:03,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:54:03,845 INFO L470 AbstractCegarLoop]: Abstraction has 18428 states and 87630 transitions. [2022-01-18 15:54:03,845 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.3636363636363638) internal successors, (78), 32 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:54:03,845 INFO L276 IsEmpty]: Start isEmpty. Operand 18428 states and 87630 transitions. [2022-01-18 15:54:03,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 15:54:03,882 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:54:03,882 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, 1, 1, 1, 1, 1] [2022-01-18 15:54:03,897 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (220)] Ended with exit code 0 [2022-01-18 15:54:04,082 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 220 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable223 [2022-01-18 15:54:04,083 INFO L402 AbstractCegarLoop]: === Iteration 225 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-01-18 15:54:04,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:54:04,083 INFO L85 PathProgramCache]: Analyzing trace with hash 839214201, now seen corresponding path program 112 times [2022-01-18 15:54:04,083 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:54:04,083 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [105942543] [2022-01-18 15:54:04,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:54:04,084 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:54:04,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:54:04,256 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 15:54:04,256 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:54:04,256 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [105942543] [2022-01-18 15:54:04,256 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [105942543] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:54:04,256 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2031100810] [2022-01-18 15:54:04,256 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 15:54:04,256 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:54:04,256 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:54:04,257 INFO L229 MonitoredProcess]: Starting monitored process 221 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:54:04,257 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (221)] Waiting until timeout for monitored process [2022-01-18 15:54:04,285 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 15:54:04,286 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:54:04,286 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2022-01-18 15:54:04,287 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:54:04,557 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:54:04,557 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 21 [2022-01-18 15:54:04,683 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 15:54:04,684 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:54:04,919 INFO L353 Elim1Store]: treesize reduction 36, result has 50.7 percent of original size [2022-01-18 15:54:04,919 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 27 treesize of output 48 [2022-01-18 15:54:04,966 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:54:04,966 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:54:04,967 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:54:04,967 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:54:04,968 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 27 treesize of output 7 [2022-01-18 15:54:05,012 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 15:54:05,012 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2031100810] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:54:05,012 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:54:05,013 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 31 [2022-01-18 15:54:05,013 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2146357384] [2022-01-18 15:54:05,013 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:54:05,013 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-01-18 15:54:05,013 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:54:05,013 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-01-18 15:54:05,013 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=863, Unknown=0, NotChecked=0, Total=992 [2022-01-18 15:54:05,013 INFO L87 Difference]: Start difference. First operand 18428 states and 87630 transitions. Second operand has 32 states, 32 states have (on average 2.46875) internal successors, (79), 31 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:54:07,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:54:07,894 INFO L93 Difference]: Finished difference Result 21691 states and 100577 transitions. [2022-01-18 15:54:07,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2022-01-18 15:54:07,895 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.46875) internal successors, (79), 31 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 15:54:07,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:54:07,964 INFO L225 Difference]: With dead ends: 21691 [2022-01-18 15:54:07,965 INFO L226 Difference]: Without dead ends: 21601 [2022-01-18 15:54:07,965 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 44 SyntacticMatches, 4 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1407 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=589, Invalid=4241, Unknown=0, NotChecked=0, Total=4830 [2022-01-18 15:54:07,965 INFO L933 BasicCegarLoop]: 80 mSDtfsCounter, 756 mSDsluCounter, 3488 mSDsCounter, 0 mSdLazyCounter, 4566 mSolverCounterSat, 132 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 756 SdHoareTripleChecker+Valid, 1490 SdHoareTripleChecker+Invalid, 4698 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 132 IncrementalHoareTripleChecker+Valid, 4566 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-01-18 15:54:07,965 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [756 Valid, 1490 Invalid, 4698 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [132 Valid, 4566 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-01-18 15:54:07,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21601 states. [2022-01-18 15:54:08,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21601 to 18843. [2022-01-18 15:54:08,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18843 states, 18842 states have (on average 4.760375756289141) internal successors, (89695), 18842 states have internal predecessors, (89695), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:54:08,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18843 states to 18843 states and 89695 transitions. [2022-01-18 15:54:08,441 INFO L78 Accepts]: Start accepts. Automaton has 18843 states and 89695 transitions. Word has length 33 [2022-01-18 15:54:08,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:54:08,441 INFO L470 AbstractCegarLoop]: Abstraction has 18843 states and 89695 transitions. [2022-01-18 15:54:08,441 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.46875) internal successors, (79), 31 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:54:08,441 INFO L276 IsEmpty]: Start isEmpty. Operand 18843 states and 89695 transitions. [2022-01-18 15:54:08,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 15:54:08,479 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:54:08,479 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, 1, 1, 1, 1, 1] [2022-01-18 15:54:08,494 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (221)] Ended with exit code 0 [2022-01-18 15:54:08,680 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 221 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable224 [2022-01-18 15:54:08,680 INFO L402 AbstractCegarLoop]: === Iteration 226 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-01-18 15:54:08,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:54:08,680 INFO L85 PathProgramCache]: Analyzing trace with hash 785827681, now seen corresponding path program 113 times [2022-01-18 15:54:08,680 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:54:08,680 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [136385013] [2022-01-18 15:54:08,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:54:08,680 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:54:08,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:54:08,856 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 15:54:08,856 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:54:08,856 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [136385013] [2022-01-18 15:54:08,856 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [136385013] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:54:08,856 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [341065078] [2022-01-18 15:54:08,856 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 15:54:08,856 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:54:08,856 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:54:08,857 INFO L229 MonitoredProcess]: Starting monitored process 222 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:54:08,857 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (222)] Waiting until timeout for monitored process [2022-01-18 15:54:08,886 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-01-18 15:54:08,886 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:54:08,887 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 44 conjunts are in the unsatisfiable core [2022-01-18 15:54:08,887 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:54:09,178 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:54:09,179 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:54:09,179 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:54:09,180 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 35 treesize of output 21 [2022-01-18 15:54:09,384 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 15:54:09,384 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:54:09,763 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:54:09,764 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:54:09,764 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:54:09,773 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:54:09,773 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 27 treesize of output 48 [2022-01-18 15:54:09,793 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:54:09,793 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:54:09,794 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:54:09,794 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:54:09,794 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 27 treesize of output 7 [2022-01-18 15:54:09,860 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 15:54:09,860 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [341065078] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:54:09,860 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:54:09,860 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 34 [2022-01-18 15:54:09,860 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [190734167] [2022-01-18 15:54:09,860 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:54:09,860 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-01-18 15:54:09,860 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:54:09,860 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-01-18 15:54:09,860 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=180, Invalid=1010, Unknown=0, NotChecked=0, Total=1190 [2022-01-18 15:54:09,861 INFO L87 Difference]: Start difference. First operand 18843 states and 89695 transitions. Second operand has 35 states, 35 states have (on average 2.4285714285714284) internal successors, (85), 34 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:54:15,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:54:15,159 INFO L93 Difference]: Finished difference Result 23929 states and 110222 transitions. [2022-01-18 15:54:15,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2022-01-18 15:54:15,159 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.4285714285714284) internal successors, (85), 34 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 15:54:15,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:54:15,230 INFO L225 Difference]: With dead ends: 23929 [2022-01-18 15:54:15,230 INFO L226 Difference]: Without dead ends: 23916 [2022-01-18 15:54:15,232 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 46 SyntacticMatches, 4 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3617 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=1480, Invalid=9232, Unknown=0, NotChecked=0, Total=10712 [2022-01-18 15:54:15,232 INFO L933 BasicCegarLoop]: 92 mSDtfsCounter, 1022 mSDsluCounter, 4445 mSDsCounter, 0 mSdLazyCounter, 5420 mSolverCounterSat, 287 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1022 SdHoareTripleChecker+Valid, 1915 SdHoareTripleChecker+Invalid, 6647 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 287 IncrementalHoareTripleChecker+Valid, 5420 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 940 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2022-01-18 15:54:15,232 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1022 Valid, 1915 Invalid, 6647 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [287 Valid, 5420 Invalid, 0 Unknown, 940 Unchecked, 2.4s Time] [2022-01-18 15:54:15,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23916 states. [2022-01-18 15:54:15,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23916 to 19280. [2022-01-18 15:54:15,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19280 states, 19279 states have (on average 4.756678250946626) internal successors, (91704), 19279 states have internal predecessors, (91704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:54:15,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19280 states to 19280 states and 91704 transitions. [2022-01-18 15:54:15,722 INFO L78 Accepts]: Start accepts. Automaton has 19280 states and 91704 transitions. Word has length 33 [2022-01-18 15:54:15,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:54:15,723 INFO L470 AbstractCegarLoop]: Abstraction has 19280 states and 91704 transitions. [2022-01-18 15:54:15,723 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.4285714285714284) internal successors, (85), 34 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:54:15,723 INFO L276 IsEmpty]: Start isEmpty. Operand 19280 states and 91704 transitions. [2022-01-18 15:54:15,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 15:54:15,761 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:54:15,761 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, 1, 1, 1, 1, 1] [2022-01-18 15:54:15,776 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (222)] Forceful destruction successful, exit code 0 [2022-01-18 15:54:15,961 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable225,222 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:54:15,961 INFO L402 AbstractCegarLoop]: === Iteration 227 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-01-18 15:54:15,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:54:15,962 INFO L85 PathProgramCache]: Analyzing trace with hash -376619487, now seen corresponding path program 114 times [2022-01-18 15:54:15,962 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:54:15,962 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [960910089] [2022-01-18 15:54:15,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:54:15,962 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:54:15,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:54:16,142 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 15:54:16,142 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:54:16,142 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [960910089] [2022-01-18 15:54:16,142 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [960910089] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:54:16,142 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1500556068] [2022-01-18 15:54:16,142 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 15:54:16,142 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:54:16,142 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:54:16,143 INFO L229 MonitoredProcess]: Starting monitored process 223 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:54:16,143 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (223)] Waiting until timeout for monitored process [2022-01-18 15:54:16,174 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-01-18 15:54:16,174 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:54:16,175 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2022-01-18 15:54:16,175 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:54:16,436 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:54:16,455 INFO L353 Elim1Store]: treesize reduction 14, result has 72.5 percent of original size [2022-01-18 15:54:16,455 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 33 treesize of output 57 [2022-01-18 15:54:16,731 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 15:54:16,731 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:54:17,103 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 15:54:17,103 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1500556068] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:54:17,103 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:54:17,103 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 12] total 31 [2022-01-18 15:54:17,104 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [653703348] [2022-01-18 15:54:17,104 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:54:17,104 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-01-18 15:54:17,104 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:54:17,104 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-01-18 15:54:17,104 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=867, Unknown=0, NotChecked=0, Total=992 [2022-01-18 15:54:17,104 INFO L87 Difference]: Start difference. First operand 19280 states and 91704 transitions. Second operand has 32 states, 32 states have (on average 2.46875) internal successors, (79), 31 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:54:21,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:54:21,663 INFO L93 Difference]: Finished difference Result 22563 states and 104578 transitions. [2022-01-18 15:54:21,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2022-01-18 15:54:21,664 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.46875) internal successors, (79), 31 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 15:54:21,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:54:21,739 INFO L225 Difference]: With dead ends: 22563 [2022-01-18 15:54:21,739 INFO L226 Difference]: Without dead ends: 22483 [2022-01-18 15:54:21,740 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 44 SyntacticMatches, 4 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2619 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=1108, Invalid=7822, Unknown=0, NotChecked=0, Total=8930 [2022-01-18 15:54:21,740 INFO L933 BasicCegarLoop]: 85 mSDtfsCounter, 1072 mSDsluCounter, 3887 mSDsCounter, 0 mSdLazyCounter, 5226 mSolverCounterSat, 304 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1072 SdHoareTripleChecker+Valid, 1653 SdHoareTripleChecker+Invalid, 5530 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 304 IncrementalHoareTripleChecker+Valid, 5226 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:54:21,740 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1072 Valid, 1653 Invalid, 5530 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [304 Valid, 5226 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2022-01-18 15:54:21,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22483 states. [2022-01-18 15:54:22,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22483 to 19163. [2022-01-18 15:54:22,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19163 states, 19162 states have (on average 4.757697526354243) internal successors, (91167), 19162 states have internal predecessors, (91167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:54:22,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19163 states to 19163 states and 91167 transitions. [2022-01-18 15:54:22,256 INFO L78 Accepts]: Start accepts. Automaton has 19163 states and 91167 transitions. Word has length 33 [2022-01-18 15:54:22,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:54:22,256 INFO L470 AbstractCegarLoop]: Abstraction has 19163 states and 91167 transitions. [2022-01-18 15:54:22,256 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.46875) internal successors, (79), 31 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:54:22,256 INFO L276 IsEmpty]: Start isEmpty. Operand 19163 states and 91167 transitions. [2022-01-18 15:54:22,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 15:54:22,295 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:54:22,295 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, 1, 1, 1, 1, 1] [2022-01-18 15:54:22,310 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (223)] Ended with exit code 0 [2022-01-18 15:54:22,495 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 223 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable226 [2022-01-18 15:54:22,495 INFO L402 AbstractCegarLoop]: === Iteration 228 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-01-18 15:54:22,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:54:22,496 INFO L85 PathProgramCache]: Analyzing trace with hash 55173915, now seen corresponding path program 115 times [2022-01-18 15:54:22,496 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:54:22,496 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [354781156] [2022-01-18 15:54:22,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:54:22,496 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:54:22,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:54:22,676 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 15:54:22,677 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:54:22,677 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [354781156] [2022-01-18 15:54:22,677 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [354781156] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:54:22,677 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [5836025] [2022-01-18 15:54:22,677 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 15:54:22,677 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:54:22,677 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:54:22,678 INFO L229 MonitoredProcess]: Starting monitored process 224 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:54:22,678 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (224)] Waiting until timeout for monitored process [2022-01-18 15:54:22,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:54:22,707 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2022-01-18 15:54:22,708 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:54:22,998 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:54:22,998 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 19 [2022-01-18 15:54:23,127 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 15:54:23,127 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:54:23,407 INFO L353 Elim1Store]: treesize reduction 36, result has 50.7 percent of original size [2022-01-18 15:54:23,407 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 27 treesize of output 48 [2022-01-18 15:54:23,466 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:54:23,467 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:54:23,467 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:54:23,468 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:54:23,468 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 27 treesize of output 7 [2022-01-18 15:54:23,513 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 15:54:23,513 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [5836025] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:54:23,513 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:54:23,513 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 32 [2022-01-18 15:54:23,513 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1310302636] [2022-01-18 15:54:23,513 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:54:23,514 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-01-18 15:54:23,514 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:54:23,514 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-01-18 15:54:23,514 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=956, Unknown=0, NotChecked=0, Total=1056 [2022-01-18 15:54:23,514 INFO L87 Difference]: Start difference. First operand 19163 states and 91167 transitions. Second operand has 33 states, 33 states have (on average 2.515151515151515) internal successors, (83), 32 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:54:26,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:54:26,427 INFO L93 Difference]: Finished difference Result 20991 states and 98389 transitions. [2022-01-18 15:54:26,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2022-01-18 15:54:26,427 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.515151515151515) internal successors, (83), 32 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 15:54:26,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:54:26,493 INFO L225 Difference]: With dead ends: 20991 [2022-01-18 15:54:26,493 INFO L226 Difference]: Without dead ends: 20979 [2022-01-18 15:54:26,494 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 43 SyntacticMatches, 4 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1343 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=489, Invalid=4481, Unknown=0, NotChecked=0, Total=4970 [2022-01-18 15:54:26,494 INFO L933 BasicCegarLoop]: 75 mSDtfsCounter, 588 mSDsluCounter, 3038 mSDsCounter, 0 mSdLazyCounter, 3877 mSolverCounterSat, 133 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 588 SdHoareTripleChecker+Valid, 1335 SdHoareTripleChecker+Invalid, 4217 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 133 IncrementalHoareTripleChecker+Valid, 3877 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 207 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-01-18 15:54:26,494 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [588 Valid, 1335 Invalid, 4217 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [133 Valid, 3877 Invalid, 0 Unknown, 207 Unchecked, 1.7s Time] [2022-01-18 15:54:26,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20979 states. [2022-01-18 15:54:26,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20979 to 19312. [2022-01-18 15:54:26,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19312 states, 19311 states have (on average 4.750763813370618) internal successors, (91742), 19311 states have internal predecessors, (91742), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:54:26,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19312 states to 19312 states and 91742 transitions. [2022-01-18 15:54:26,944 INFO L78 Accepts]: Start accepts. Automaton has 19312 states and 91742 transitions. Word has length 33 [2022-01-18 15:54:26,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:54:26,944 INFO L470 AbstractCegarLoop]: Abstraction has 19312 states and 91742 transitions. [2022-01-18 15:54:26,944 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.515151515151515) internal successors, (83), 32 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:54:26,945 INFO L276 IsEmpty]: Start isEmpty. Operand 19312 states and 91742 transitions. [2022-01-18 15:54:26,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 15:54:26,986 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:54:26,986 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, 1, 1, 1, 1, 1] [2022-01-18 15:54:27,002 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (224)] Ended with exit code 0 [2022-01-18 15:54:27,187 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 224 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable227 [2022-01-18 15:54:27,187 INFO L402 AbstractCegarLoop]: === Iteration 229 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-01-18 15:54:27,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:54:27,187 INFO L85 PathProgramCache]: Analyzing trace with hash -2063118535, now seen corresponding path program 116 times [2022-01-18 15:54:27,187 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:54:27,187 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1781418452] [2022-01-18 15:54:27,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:54:27,187 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:54:27,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:54:27,368 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 15:54:27,368 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:54:27,369 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1781418452] [2022-01-18 15:54:27,369 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1781418452] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:54:27,369 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [207680704] [2022-01-18 15:54:27,369 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 15:54:27,369 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:54:27,369 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:54:27,370 INFO L229 MonitoredProcess]: Starting monitored process 225 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:54:27,370 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (225)] Waiting until timeout for monitored process [2022-01-18 15:54:27,399 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:54:27,399 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:54:27,400 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2022-01-18 15:54:27,400 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:54:27,670 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:54:27,670 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 3 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 49 [2022-01-18 15:54:28,193 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 15:54:28,194 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:54:28,418 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:54:28,418 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 22 [2022-01-18 15:54:28,427 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:54:28,440 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 7 [2022-01-18 15:54:28,496 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 15:54:28,497 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [207680704] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:54:28,497 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:54:28,497 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 31 [2022-01-18 15:54:28,497 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [59267070] [2022-01-18 15:54:28,497 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:54:28,497 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-01-18 15:54:28,497 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:54:28,497 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-01-18 15:54:28,497 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=897, Unknown=0, NotChecked=0, Total=992 [2022-01-18 15:54:28,497 INFO L87 Difference]: Start difference. First operand 19312 states and 91742 transitions. Second operand has 32 states, 32 states have (on average 2.21875) internal successors, (71), 31 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:54:31,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:54:31,349 INFO L93 Difference]: Finished difference Result 20328 states and 96004 transitions. [2022-01-18 15:54:31,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-01-18 15:54:31,349 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.21875) internal successors, (71), 31 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 15:54:31,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:54:31,413 INFO L225 Difference]: With dead ends: 20328 [2022-01-18 15:54:31,413 INFO L226 Difference]: Without dead ends: 20317 [2022-01-18 15:54:31,414 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 44 SyntacticMatches, 9 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1209 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=517, Invalid=3773, Unknown=0, NotChecked=0, Total=4290 [2022-01-18 15:54:31,414 INFO L933 BasicCegarLoop]: 59 mSDtfsCounter, 464 mSDsluCounter, 2355 mSDsCounter, 0 mSdLazyCounter, 2867 mSolverCounterSat, 117 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 464 SdHoareTripleChecker+Valid, 1028 SdHoareTripleChecker+Invalid, 3214 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 117 IncrementalHoareTripleChecker+Valid, 2867 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 230 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-01-18 15:54:31,414 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [464 Valid, 1028 Invalid, 3214 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [117 Valid, 2867 Invalid, 0 Unknown, 230 Unchecked, 1.3s Time] [2022-01-18 15:54:31,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20317 states. [2022-01-18 15:54:31,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20317 to 19337. [2022-01-18 15:54:31,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19337 states, 19336 states have (on average 4.748810508895325) internal successors, (91823), 19336 states have internal predecessors, (91823), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:54:31,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19337 states to 19337 states and 91823 transitions. [2022-01-18 15:54:31,965 INFO L78 Accepts]: Start accepts. Automaton has 19337 states and 91823 transitions. Word has length 33 [2022-01-18 15:54:31,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:54:31,965 INFO L470 AbstractCegarLoop]: Abstraction has 19337 states and 91823 transitions. [2022-01-18 15:54:31,965 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.21875) internal successors, (71), 31 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:54:31,965 INFO L276 IsEmpty]: Start isEmpty. Operand 19337 states and 91823 transitions. [2022-01-18 15:54:32,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 15:54:32,008 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:54:32,008 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, 1, 1, 1, 1, 1] [2022-01-18 15:54:32,029 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (225)] Ended with exit code 0 [2022-01-18 15:54:32,208 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable228,225 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:54:32,208 INFO L402 AbstractCegarLoop]: === Iteration 230 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-01-18 15:54:32,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:54:32,209 INFO L85 PathProgramCache]: Analyzing trace with hash -320308200, now seen corresponding path program 16 times [2022-01-18 15:54:32,209 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:54:32,209 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1318013126] [2022-01-18 15:54:32,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:54:32,209 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:54:32,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:54:32,414 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 15:54:32,415 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:54:32,415 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1318013126] [2022-01-18 15:54:32,415 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1318013126] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:54:32,415 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2140546274] [2022-01-18 15:54:32,415 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 15:54:32,415 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:54:32,415 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:54:32,416 INFO L229 MonitoredProcess]: Starting monitored process 226 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:54:32,416 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (226)] Waiting until timeout for monitored process [2022-01-18 15:54:32,447 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 15:54:32,447 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:54:32,448 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2022-01-18 15:54:32,448 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:54:32,764 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:54:32,765 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 37 treesize of output 21 [2022-01-18 15:54:32,907 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 15:54:32,908 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:54:33,195 INFO L353 Elim1Store]: treesize reduction 36, result has 50.7 percent of original size [2022-01-18 15:54:33,196 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 27 treesize of output 48 [2022-01-18 15:54:33,249 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:54:33,249 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:54:33,250 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:54:33,250 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:54:33,250 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 7 [2022-01-18 15:54:33,295 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 15:54:33,295 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2140546274] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:54:33,295 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:54:33,295 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 32 [2022-01-18 15:54:33,295 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1145272625] [2022-01-18 15:54:33,295 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:54:33,295 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-01-18 15:54:33,295 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:54:33,295 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-01-18 15:54:33,295 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=956, Unknown=0, NotChecked=0, Total=1056 [2022-01-18 15:54:33,296 INFO L87 Difference]: Start difference. First operand 19337 states and 91823 transitions. Second operand has 33 states, 33 states have (on average 2.4545454545454546) internal successors, (81), 32 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:54:36,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:54:36,440 INFO L93 Difference]: Finished difference Result 21020 states and 98464 transitions. [2022-01-18 15:54:36,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2022-01-18 15:54:36,440 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.4545454545454546) internal successors, (81), 32 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 15:54:36,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:54:36,501 INFO L225 Difference]: With dead ends: 21020 [2022-01-18 15:54:36,501 INFO L226 Difference]: Without dead ends: 20923 [2022-01-18 15:54:36,502 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 43 SyntacticMatches, 4 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1392 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=495, Invalid=4617, Unknown=0, NotChecked=0, Total=5112 [2022-01-18 15:54:36,502 INFO L933 BasicCegarLoop]: 76 mSDtfsCounter, 567 mSDsluCounter, 3606 mSDsCounter, 0 mSdLazyCounter, 4851 mSolverCounterSat, 128 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 567 SdHoareTripleChecker+Valid, 1559 SdHoareTripleChecker+Invalid, 4979 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 128 IncrementalHoareTripleChecker+Valid, 4851 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-01-18 15:54:36,502 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [567 Valid, 1559 Invalid, 4979 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [128 Valid, 4851 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-01-18 15:54:36,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20923 states. [2022-01-18 15:54:36,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20923 to 19241. [2022-01-18 15:54:36,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19241 states, 19240 states have (on average 4.757068607068607) internal successors, (91526), 19240 states have internal predecessors, (91526), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:54:37,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19241 states to 19241 states and 91526 transitions. [2022-01-18 15:54:37,130 INFO L78 Accepts]: Start accepts. Automaton has 19241 states and 91526 transitions. Word has length 33 [2022-01-18 15:54:37,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:54:37,130 INFO L470 AbstractCegarLoop]: Abstraction has 19241 states and 91526 transitions. [2022-01-18 15:54:37,130 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.4545454545454546) internal successors, (81), 32 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:54:37,131 INFO L276 IsEmpty]: Start isEmpty. Operand 19241 states and 91526 transitions. [2022-01-18 15:54:37,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 15:54:37,172 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:54:37,172 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, 1, 1, 1, 1, 1] [2022-01-18 15:54:37,187 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (226)] Ended with exit code 0 [2022-01-18 15:54:37,372 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable229,226 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:54:37,372 INFO L402 AbstractCegarLoop]: === Iteration 231 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-01-18 15:54:37,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:54:37,373 INFO L85 PathProgramCache]: Analyzing trace with hash -508423509, now seen corresponding path program 117 times [2022-01-18 15:54:37,373 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:54:37,373 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1405483101] [2022-01-18 15:54:37,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:54:37,373 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:54:37,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:54:37,551 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 15:54:37,551 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:54:37,551 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1405483101] [2022-01-18 15:54:37,551 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1405483101] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:54:37,552 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1115905265] [2022-01-18 15:54:37,552 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 15:54:37,552 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:54:37,552 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:54:37,552 INFO L229 MonitoredProcess]: Starting monitored process 227 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:54:37,553 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (227)] Waiting until timeout for monitored process [2022-01-18 15:54:37,583 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 15:54:37,583 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:54:37,584 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2022-01-18 15:54:37,584 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:54:37,842 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:54:37,843 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 3 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 49 [2022-01-18 15:54:38,511 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 15:54:38,511 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:54:38,730 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:54:38,730 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 22 [2022-01-18 15:54:38,739 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:54:38,739 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 7 [2022-01-18 15:54:38,785 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 15:54:38,786 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1115905265] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:54:38,786 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:54:38,786 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 31 [2022-01-18 15:54:38,786 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1212123278] [2022-01-18 15:54:38,786 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:54:38,786 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-01-18 15:54:38,786 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:54:38,786 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-01-18 15:54:38,786 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=885, Unknown=0, NotChecked=0, Total=992 [2022-01-18 15:54:38,786 INFO L87 Difference]: Start difference. First operand 19241 states and 91526 transitions. Second operand has 32 states, 32 states have (on average 2.25) internal successors, (72), 31 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:54:40,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:54:40,565 INFO L93 Difference]: Finished difference Result 19870 states and 93984 transitions. [2022-01-18 15:54:40,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-01-18 15:54:40,566 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.25) internal successors, (72), 31 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 15:54:40,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:54:40,626 INFO L225 Difference]: With dead ends: 19870 [2022-01-18 15:54:40,626 INFO L226 Difference]: Without dead ends: 19859 [2022-01-18 15:54:40,627 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 48 SyntacticMatches, 4 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 724 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=321, Invalid=2435, Unknown=0, NotChecked=0, Total=2756 [2022-01-18 15:54:40,627 INFO L933 BasicCegarLoop]: 49 mSDtfsCounter, 463 mSDsluCounter, 2118 mSDsCounter, 0 mSdLazyCounter, 2368 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 463 SdHoareTripleChecker+Valid, 856 SdHoareTripleChecker+Invalid, 2897 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 2368 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 460 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-01-18 15:54:40,627 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [463 Valid, 856 Invalid, 2897 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 2368 Invalid, 0 Unknown, 460 Unchecked, 1.0s Time] [2022-01-18 15:54:40,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19859 states. [2022-01-18 15:54:41,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19859 to 19257. [2022-01-18 15:54:41,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19257 states, 19256 states have (on average 4.755972164520149) internal successors, (91581), 19256 states have internal predecessors, (91581), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:54:41,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19257 states to 19257 states and 91581 transitions. [2022-01-18 15:54:41,195 INFO L78 Accepts]: Start accepts. Automaton has 19257 states and 91581 transitions. Word has length 33 [2022-01-18 15:54:41,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:54:41,195 INFO L470 AbstractCegarLoop]: Abstraction has 19257 states and 91581 transitions. [2022-01-18 15:54:41,195 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.25) internal successors, (72), 31 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:54:41,195 INFO L276 IsEmpty]: Start isEmpty. Operand 19257 states and 91581 transitions. [2022-01-18 15:54:41,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 15:54:41,236 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:54:41,236 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, 1, 1, 1, 1, 1] [2022-01-18 15:54:41,252 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (227)] Forceful destruction successful, exit code 0 [2022-01-18 15:54:41,436 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable230,227 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:54:41,436 INFO L402 AbstractCegarLoop]: === Iteration 232 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-01-18 15:54:41,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:54:41,437 INFO L85 PathProgramCache]: Analyzing trace with hash 379080172, now seen corresponding path program 17 times [2022-01-18 15:54:41,437 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:54:41,437 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [837443195] [2022-01-18 15:54:41,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:54:41,437 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:54:41,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:54:41,615 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 15:54:41,615 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:54:41,616 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [837443195] [2022-01-18 15:54:41,616 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [837443195] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:54:41,616 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [169959974] [2022-01-18 15:54:41,616 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 15:54:41,616 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:54:41,616 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:54:41,617 INFO L229 MonitoredProcess]: Starting monitored process 228 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:54:41,617 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (228)] Waiting until timeout for monitored process [2022-01-18 15:54:41,646 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 15:54:41,646 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:54:41,647 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2022-01-18 15:54:41,647 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:54:41,930 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:54:41,931 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 21 [2022-01-18 15:54:42,067 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 15:54:42,067 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:54:42,331 INFO L353 Elim1Store]: treesize reduction 36, result has 50.7 percent of original size [2022-01-18 15:54:42,331 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 27 treesize of output 48 [2022-01-18 15:54:42,386 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:54:42,386 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:54:42,387 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:54:42,387 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:54:42,387 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 7 [2022-01-18 15:54:42,431 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 15:54:42,431 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [169959974] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:54:42,432 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:54:42,432 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 32 [2022-01-18 15:54:42,432 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1012781854] [2022-01-18 15:54:42,432 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:54:42,432 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-01-18 15:54:42,432 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:54:42,432 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-01-18 15:54:42,432 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=933, Unknown=0, NotChecked=0, Total=1056 [2022-01-18 15:54:42,432 INFO L87 Difference]: Start difference. First operand 19257 states and 91581 transitions. Second operand has 33 states, 33 states have (on average 2.515151515151515) internal successors, (83), 32 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:54:45,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:54:45,484 INFO L93 Difference]: Finished difference Result 21990 states and 102172 transitions. [2022-01-18 15:54:45,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2022-01-18 15:54:45,484 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.515151515151515) internal successors, (83), 32 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 15:54:45,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:54:45,549 INFO L225 Difference]: With dead ends: 21990 [2022-01-18 15:54:45,550 INFO L226 Difference]: Without dead ends: 21866 [2022-01-18 15:54:45,550 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 45 SyntacticMatches, 4 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1684 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=618, Invalid=5234, Unknown=0, NotChecked=0, Total=5852 [2022-01-18 15:54:45,551 INFO L933 BasicCegarLoop]: 84 mSDtfsCounter, 785 mSDsluCounter, 3450 mSDsCounter, 0 mSdLazyCounter, 4205 mSolverCounterSat, 145 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 785 SdHoareTripleChecker+Valid, 1486 SdHoareTripleChecker+Invalid, 4741 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 145 IncrementalHoareTripleChecker+Valid, 4205 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 391 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-01-18 15:54:45,551 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [785 Valid, 1486 Invalid, 4741 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [145 Valid, 4205 Invalid, 0 Unknown, 391 Unchecked, 1.7s Time] [2022-01-18 15:54:45,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21866 states. [2022-01-18 15:54:46,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21866 to 19015. [2022-01-18 15:54:46,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19015 states, 19014 states have (on average 4.761333754075944) internal successors, (90532), 19014 states have internal predecessors, (90532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:54:46,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19015 states to 19015 states and 90532 transitions. [2022-01-18 15:54:46,108 INFO L78 Accepts]: Start accepts. Automaton has 19015 states and 90532 transitions. Word has length 33 [2022-01-18 15:54:46,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:54:46,108 INFO L470 AbstractCegarLoop]: Abstraction has 19015 states and 90532 transitions. [2022-01-18 15:54:46,108 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.515151515151515) internal successors, (83), 32 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:54:46,108 INFO L276 IsEmpty]: Start isEmpty. Operand 19015 states and 90532 transitions. [2022-01-18 15:54:46,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 15:54:46,146 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:54:46,146 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, 1, 1, 1, 1, 1] [2022-01-18 15:54:46,161 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (228)] Ended with exit code 0 [2022-01-18 15:54:46,347 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable231,228 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:54:46,347 INFO L402 AbstractCegarLoop]: === Iteration 233 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-01-18 15:54:46,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:54:46,348 INFO L85 PathProgramCache]: Analyzing trace with hash -945888303, now seen corresponding path program 118 times [2022-01-18 15:54:46,348 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:54:46,348 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1725023128] [2022-01-18 15:54:46,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:54:46,348 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:54:46,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:54:46,514 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 15:54:46,514 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:54:46,515 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1725023128] [2022-01-18 15:54:46,515 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1725023128] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:54:46,515 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [657612987] [2022-01-18 15:54:46,515 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 15:54:46,515 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:54:46,515 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:54:46,516 INFO L229 MonitoredProcess]: Starting monitored process 229 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:54:46,516 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (229)] Waiting until timeout for monitored process [2022-01-18 15:54:46,545 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 15:54:46,545 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:54:46,546 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2022-01-18 15:54:46,546 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:54:46,867 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:54:46,868 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 21 [2022-01-18 15:54:46,986 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 15:54:46,987 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:54:47,265 INFO L353 Elim1Store]: treesize reduction 36, result has 50.7 percent of original size [2022-01-18 15:54:47,266 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 27 treesize of output 48 [2022-01-18 15:54:47,324 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:54:47,324 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:54:47,325 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:54:47,325 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:54:47,326 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 27 treesize of output 7 [2022-01-18 15:54:47,369 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 15:54:47,370 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [657612987] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:54:47,370 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:54:47,370 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 31 [2022-01-18 15:54:47,370 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [167090470] [2022-01-18 15:54:47,370 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:54:47,370 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-01-18 15:54:47,370 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:54:47,370 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-01-18 15:54:47,370 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=864, Unknown=0, NotChecked=0, Total=992 [2022-01-18 15:54:47,371 INFO L87 Difference]: Start difference. First operand 19015 states and 90532 transitions. Second operand has 32 states, 32 states have (on average 2.59375) internal successors, (83), 31 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:54:50,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:54:50,666 INFO L93 Difference]: Finished difference Result 21715 states and 101365 transitions. [2022-01-18 15:54:50,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2022-01-18 15:54:50,667 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.59375) internal successors, (83), 31 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 15:54:50,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:54:50,732 INFO L225 Difference]: With dead ends: 21715 [2022-01-18 15:54:50,732 INFO L226 Difference]: Without dead ends: 21653 [2022-01-18 15:54:50,732 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 47 SyntacticMatches, 4 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2028 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=685, Invalid=5957, Unknown=0, NotChecked=0, Total=6642 [2022-01-18 15:54:50,732 INFO L933 BasicCegarLoop]: 90 mSDtfsCounter, 661 mSDsluCounter, 3430 mSDsCounter, 0 mSdLazyCounter, 4553 mSolverCounterSat, 127 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 661 SdHoareTripleChecker+Valid, 1486 SdHoareTripleChecker+Invalid, 5017 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 127 IncrementalHoareTripleChecker+Valid, 4553 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 337 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-01-18 15:54:50,733 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [661 Valid, 1486 Invalid, 5017 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [127 Valid, 4553 Invalid, 0 Unknown, 337 Unchecked, 1.9s Time] [2022-01-18 15:54:50,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21653 states. [2022-01-18 15:54:51,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21653 to 19385. [2022-01-18 15:54:51,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19385 states, 19384 states have (on average 4.758666941807676) internal successors, (92242), 19384 states have internal predecessors, (92242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:54:51,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19385 states to 19385 states and 92242 transitions. [2022-01-18 15:54:51,181 INFO L78 Accepts]: Start accepts. Automaton has 19385 states and 92242 transitions. Word has length 33 [2022-01-18 15:54:51,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:54:51,181 INFO L470 AbstractCegarLoop]: Abstraction has 19385 states and 92242 transitions. [2022-01-18 15:54:51,181 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.59375) internal successors, (83), 31 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:54:51,181 INFO L276 IsEmpty]: Start isEmpty. Operand 19385 states and 92242 transitions. [2022-01-18 15:54:51,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 15:54:51,221 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:54:51,221 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, 1, 1, 1, 1, 1] [2022-01-18 15:54:51,236 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (229)] Ended with exit code 0 [2022-01-18 15:54:51,429 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable232,229 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:54:51,429 INFO L402 AbstractCegarLoop]: === Iteration 234 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-01-18 15:54:51,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:54:51,429 INFO L85 PathProgramCache]: Analyzing trace with hash 420278763, now seen corresponding path program 119 times [2022-01-18 15:54:51,429 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:54:51,429 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2142372461] [2022-01-18 15:54:51,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:54:51,429 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:54:51,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:54:51,597 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 15:54:51,597 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:54:51,597 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2142372461] [2022-01-18 15:54:51,597 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2142372461] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:54:51,598 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1990863814] [2022-01-18 15:54:51,598 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 15:54:51,598 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:54:51,598 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:54:51,599 INFO L229 MonitoredProcess]: Starting monitored process 230 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:54:51,599 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (230)] Waiting until timeout for monitored process [2022-01-18 15:54:51,629 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-01-18 15:54:51,629 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:54:51,630 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2022-01-18 15:54:51,630 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:54:51,935 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:54:51,936 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 37 treesize of output 21 [2022-01-18 15:54:52,047 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 15:54:52,048 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:54:52,294 INFO L353 Elim1Store]: treesize reduction 36, result has 50.7 percent of original size [2022-01-18 15:54:52,295 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 27 treesize of output 48 [2022-01-18 15:54:52,354 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:54:52,354 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:54:52,355 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:54:52,355 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:54:52,356 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 27 treesize of output 7 [2022-01-18 15:54:52,400 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 15:54:52,401 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1990863814] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:54:52,401 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:54:52,401 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 31 [2022-01-18 15:54:52,401 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1011787889] [2022-01-18 15:54:52,401 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:54:52,401 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-01-18 15:54:52,401 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:54:52,401 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-01-18 15:54:52,401 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=864, Unknown=0, NotChecked=0, Total=992 [2022-01-18 15:54:52,401 INFO L87 Difference]: Start difference. First operand 19385 states and 92242 transitions. Second operand has 32 states, 32 states have (on average 2.53125) internal successors, (81), 31 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:54:55,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:54:55,332 INFO L93 Difference]: Finished difference Result 21591 states and 101078 transitions. [2022-01-18 15:54:55,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2022-01-18 15:54:55,333 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.53125) internal successors, (81), 31 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 15:54:55,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:54:55,396 INFO L225 Difference]: With dead ends: 21591 [2022-01-18 15:54:55,396 INFO L226 Difference]: Without dead ends: 21576 [2022-01-18 15:54:55,397 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 48 SyntacticMatches, 4 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1789 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=646, Invalid=5360, Unknown=0, NotChecked=0, Total=6006 [2022-01-18 15:54:55,397 INFO L933 BasicCegarLoop]: 86 mSDtfsCounter, 649 mSDsluCounter, 2998 mSDsCounter, 0 mSdLazyCounter, 4066 mSolverCounterSat, 115 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 649 SdHoareTripleChecker+Valid, 1320 SdHoareTripleChecker+Invalid, 4349 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 115 IncrementalHoareTripleChecker+Valid, 4066 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 168 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-01-18 15:54:55,397 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [649 Valid, 1320 Invalid, 4349 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [115 Valid, 4066 Invalid, 0 Unknown, 168 Unchecked, 1.7s Time] [2022-01-18 15:54:55,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21576 states. [2022-01-18 15:54:55,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21576 to 19385. [2022-01-18 15:54:55,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19385 states, 19384 states have (on average 4.758563763929014) internal successors, (92240), 19384 states have internal predecessors, (92240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:54:55,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19385 states to 19385 states and 92240 transitions. [2022-01-18 15:54:55,827 INFO L78 Accepts]: Start accepts. Automaton has 19385 states and 92240 transitions. Word has length 33 [2022-01-18 15:54:55,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:54:55,827 INFO L470 AbstractCegarLoop]: Abstraction has 19385 states and 92240 transitions. [2022-01-18 15:54:55,827 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.53125) internal successors, (81), 31 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:54:55,827 INFO L276 IsEmpty]: Start isEmpty. Operand 19385 states and 92240 transitions. [2022-01-18 15:54:55,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 15:54:55,866 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:54:55,866 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, 1, 1, 1, 1, 1] [2022-01-18 15:54:55,882 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (230)] Ended with exit code 0 [2022-01-18 15:54:56,067 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable233,230 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:54:56,067 INFO L402 AbstractCegarLoop]: === Iteration 235 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-01-18 15:54:56,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:54:56,067 INFO L85 PathProgramCache]: Analyzing trace with hash -2131878198, now seen corresponding path program 18 times [2022-01-18 15:54:56,067 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:54:56,067 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1465052698] [2022-01-18 15:54:56,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:54:56,067 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:54:56,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:54:56,241 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 15:54:56,242 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:54:56,242 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1465052698] [2022-01-18 15:54:56,242 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1465052698] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:54:56,242 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1710657529] [2022-01-18 15:54:56,242 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 15:54:56,242 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:54:56,242 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:54:56,243 INFO L229 MonitoredProcess]: Starting monitored process 231 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:54:56,243 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (231)] Waiting until timeout for monitored process [2022-01-18 15:54:56,273 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-01-18 15:54:56,273 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:54:56,274 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2022-01-18 15:54:56,274 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:54:56,552 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:54:56,572 INFO L353 Elim1Store]: treesize reduction 12, result has 76.5 percent of original size [2022-01-18 15:54:56,572 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 33 treesize of output 59 [2022-01-18 15:54:56,808 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 15:54:56,808 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:54:57,087 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 15:54:57,087 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1710657529] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:54:57,087 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:54:57,087 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 13] total 31 [2022-01-18 15:54:57,087 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [3080728] [2022-01-18 15:54:57,087 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:54:57,087 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-01-18 15:54:57,088 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:54:57,088 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-01-18 15:54:57,088 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=875, Unknown=0, NotChecked=0, Total=992 [2022-01-18 15:54:57,088 INFO L87 Difference]: Start difference. First operand 19385 states and 92240 transitions. Second operand has 32 states, 32 states have (on average 2.4375) internal successors, (78), 31 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:55:02,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:55:02,144 INFO L93 Difference]: Finished difference Result 23518 states and 108687 transitions. [2022-01-18 15:55:02,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2022-01-18 15:55:02,145 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.4375) internal successors, (78), 31 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 15:55:02,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:55:02,219 INFO L225 Difference]: With dead ends: 23518 [2022-01-18 15:55:02,219 INFO L226 Difference]: Without dead ends: 23432 [2022-01-18 15:55:02,220 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 44 SyntacticMatches, 4 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2823 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=970, Invalid=8342, Unknown=0, NotChecked=0, Total=9312 [2022-01-18 15:55:02,220 INFO L933 BasicCegarLoop]: 92 mSDtfsCounter, 1159 mSDsluCounter, 4187 mSDsCounter, 0 mSdLazyCounter, 5605 mSolverCounterSat, 203 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1159 SdHoareTripleChecker+Valid, 1761 SdHoareTripleChecker+Invalid, 5808 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 203 IncrementalHoareTripleChecker+Valid, 5605 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2022-01-18 15:55:02,220 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1159 Valid, 1761 Invalid, 5808 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [203 Valid, 5605 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2022-01-18 15:55:02,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23432 states. [2022-01-18 15:55:02,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23432 to 19539. [2022-01-18 15:55:02,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19539 states, 19538 states have (on average 4.768400040945849) internal successors, (93165), 19538 states have internal predecessors, (93165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:55:02,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19539 states to 19539 states and 93165 transitions. [2022-01-18 15:55:02,737 INFO L78 Accepts]: Start accepts. Automaton has 19539 states and 93165 transitions. Word has length 33 [2022-01-18 15:55:02,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:55:02,737 INFO L470 AbstractCegarLoop]: Abstraction has 19539 states and 93165 transitions. [2022-01-18 15:55:02,737 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.4375) internal successors, (78), 31 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:55:02,737 INFO L276 IsEmpty]: Start isEmpty. Operand 19539 states and 93165 transitions. [2022-01-18 15:55:02,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 15:55:02,779 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:55:02,779 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, 1, 1, 1, 1, 1] [2022-01-18 15:55:02,796 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (231)] Forceful destruction successful, exit code 0 [2022-01-18 15:55:02,979 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 231 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable234 [2022-01-18 15:55:02,979 INFO L402 AbstractCegarLoop]: === Iteration 236 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-01-18 15:55:02,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:55:02,980 INFO L85 PathProgramCache]: Analyzing trace with hash 357384303, now seen corresponding path program 120 times [2022-01-18 15:55:02,980 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:55:02,980 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [360115548] [2022-01-18 15:55:02,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:55:02,980 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:55:02,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:55:03,129 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 15:55:03,129 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:55:03,129 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [360115548] [2022-01-18 15:55:03,129 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [360115548] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:55:03,129 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [900436123] [2022-01-18 15:55:03,129 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 15:55:03,129 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:55:03,129 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:55:03,130 INFO L229 MonitoredProcess]: Starting monitored process 232 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:55:03,131 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (232)] Waiting until timeout for monitored process [2022-01-18 15:55:03,161 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-01-18 15:55:03,161 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:55:03,162 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2022-01-18 15:55:03,162 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:55:03,432 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:55:03,453 INFO L353 Elim1Store]: treesize reduction 14, result has 72.5 percent of original size [2022-01-18 15:55:03,453 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 33 treesize of output 57 [2022-01-18 15:55:03,647 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 15:55:03,647 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:55:03,905 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 15:55:03,905 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [900436123] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:55:03,905 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:55:03,905 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14, 12] total 30 [2022-01-18 15:55:03,905 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1339913283] [2022-01-18 15:55:03,905 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:55:03,905 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-01-18 15:55:03,905 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:55:03,905 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-01-18 15:55:03,905 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=812, Unknown=0, NotChecked=0, Total=930 [2022-01-18 15:55:03,906 INFO L87 Difference]: Start difference. First operand 19539 states and 93165 transitions. Second operand has 31 states, 31 states have (on average 2.5161290322580645) internal successors, (78), 30 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:55:08,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:55:08,013 INFO L93 Difference]: Finished difference Result 22700 states and 105207 transitions. [2022-01-18 15:55:08,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2022-01-18 15:55:08,014 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.5161290322580645) internal successors, (78), 30 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 15:55:08,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:55:08,081 INFO L225 Difference]: With dead ends: 22700 [2022-01-18 15:55:08,081 INFO L226 Difference]: Without dead ends: 22633 [2022-01-18 15:55:08,082 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 45 SyntacticMatches, 4 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2339 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=920, Invalid=7090, Unknown=0, NotChecked=0, Total=8010 [2022-01-18 15:55:08,082 INFO L933 BasicCegarLoop]: 91 mSDtfsCounter, 1057 mSDsluCounter, 3518 mSDsCounter, 0 mSdLazyCounter, 4662 mSolverCounterSat, 218 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1057 SdHoareTripleChecker+Valid, 1515 SdHoareTripleChecker+Invalid, 4880 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 218 IncrementalHoareTripleChecker+Valid, 4662 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-01-18 15:55:08,082 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1057 Valid, 1515 Invalid, 4880 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [218 Valid, 4662 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2022-01-18 15:55:08,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22633 states. [2022-01-18 15:55:08,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22633 to 19591. [2022-01-18 15:55:08,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19591 states, 19590 states have (on average 4.763297600816744) internal successors, (93313), 19590 states have internal predecessors, (93313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:55:08,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19591 states to 19591 states and 93313 transitions. [2022-01-18 15:55:08,553 INFO L78 Accepts]: Start accepts. Automaton has 19591 states and 93313 transitions. Word has length 33 [2022-01-18 15:55:08,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:55:08,553 INFO L470 AbstractCegarLoop]: Abstraction has 19591 states and 93313 transitions. [2022-01-18 15:55:08,553 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.5161290322580645) internal successors, (78), 30 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:55:08,553 INFO L276 IsEmpty]: Start isEmpty. Operand 19591 states and 93313 transitions. [2022-01-18 15:55:08,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 15:55:08,593 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:55:08,593 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, 1, 1, 1, 1, 1] [2022-01-18 15:55:08,608 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (232)] Forceful destruction successful, exit code 0 [2022-01-18 15:55:08,793 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 232 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable235 [2022-01-18 15:55:08,793 INFO L402 AbstractCegarLoop]: === Iteration 237 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-01-18 15:55:08,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:55:08,793 INFO L85 PathProgramCache]: Analyzing trace with hash -541977769, now seen corresponding path program 121 times [2022-01-18 15:55:08,793 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:55:08,793 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [328110109] [2022-01-18 15:55:08,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:55:08,794 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:55:08,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:55:09,020 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 15:55:09,021 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:55:09,021 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [328110109] [2022-01-18 15:55:09,021 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [328110109] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:55:09,021 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1204968514] [2022-01-18 15:55:09,021 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 15:55:09,021 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:55:09,021 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:55:09,022 INFO L229 MonitoredProcess]: Starting monitored process 233 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:55:09,022 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (233)] Waiting until timeout for monitored process [2022-01-18 15:55:09,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:55:09,052 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2022-01-18 15:55:09,052 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:55:09,348 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:55:09,348 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 21 [2022-01-18 15:55:09,455 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 15:55:09,455 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:55:09,710 INFO L353 Elim1Store]: treesize reduction 36, result has 50.7 percent of original size [2022-01-18 15:55:09,711 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 27 treesize of output 48 [2022-01-18 15:55:09,759 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:55:09,760 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:55:09,760 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:55:09,761 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:55:09,761 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 27 treesize of output 7 [2022-01-18 15:55:09,807 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 15:55:09,807 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1204968514] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:55:09,807 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:55:09,807 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 32 [2022-01-18 15:55:09,807 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [481441801] [2022-01-18 15:55:09,807 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:55:09,807 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-01-18 15:55:09,807 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:55:09,807 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-01-18 15:55:09,808 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=907, Unknown=0, NotChecked=0, Total=1056 [2022-01-18 15:55:09,808 INFO L87 Difference]: Start difference. First operand 19591 states and 93313 transitions. Second operand has 33 states, 33 states have (on average 2.4545454545454546) internal successors, (81), 32 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:55:15,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:55:15,696 INFO L93 Difference]: Finished difference Result 24270 states and 110482 transitions. [2022-01-18 15:55:15,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 107 states. [2022-01-18 15:55:15,697 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.4545454545454546) internal successors, (81), 32 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 15:55:15,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:55:15,769 INFO L225 Difference]: With dead ends: 24270 [2022-01-18 15:55:15,769 INFO L226 Difference]: Without dead ends: 24206 [2022-01-18 15:55:15,771 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 57 SyntacticMatches, 4 SemanticMatches, 118 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5083 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=1605, Invalid=12675, Unknown=0, NotChecked=0, Total=14280 [2022-01-18 15:55:15,771 INFO L933 BasicCegarLoop]: 104 mSDtfsCounter, 1200 mSDsluCounter, 4401 mSDsCounter, 0 mSdLazyCounter, 5277 mSolverCounterSat, 222 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1200 SdHoareTripleChecker+Valid, 1845 SdHoareTripleChecker+Invalid, 5913 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 222 IncrementalHoareTripleChecker+Valid, 5277 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 414 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2022-01-18 15:55:15,771 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1200 Valid, 1845 Invalid, 5913 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [222 Valid, 5277 Invalid, 0 Unknown, 414 Unchecked, 2.5s Time] [2022-01-18 15:55:15,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24206 states. [2022-01-18 15:55:16,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24206 to 19929. [2022-01-18 15:55:16,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19929 states, 19928 states have (on average 4.760839020473705) internal successors, (94874), 19928 states have internal predecessors, (94874), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:55:16,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19929 states to 19929 states and 94874 transitions. [2022-01-18 15:55:16,324 INFO L78 Accepts]: Start accepts. Automaton has 19929 states and 94874 transitions. Word has length 33 [2022-01-18 15:55:16,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:55:16,324 INFO L470 AbstractCegarLoop]: Abstraction has 19929 states and 94874 transitions. [2022-01-18 15:55:16,324 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.4545454545454546) internal successors, (81), 32 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:55:16,324 INFO L276 IsEmpty]: Start isEmpty. Operand 19929 states and 94874 transitions. [2022-01-18 15:55:16,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 15:55:16,364 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:55:16,364 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, 1, 1, 1, 1, 1] [2022-01-18 15:55:16,379 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (233)] Ended with exit code 0 [2022-01-18 15:55:16,564 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 233 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable236 [2022-01-18 15:55:16,564 INFO L402 AbstractCegarLoop]: === Iteration 238 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-01-18 15:55:16,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:55:16,564 INFO L85 PathProgramCache]: Analyzing trace with hash 1972391225, now seen corresponding path program 122 times [2022-01-18 15:55:16,564 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:55:16,564 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1199918258] [2022-01-18 15:55:16,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:55:16,564 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:55:16,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:55:16,818 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 15:55:16,818 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:55:16,818 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1199918258] [2022-01-18 15:55:16,818 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1199918258] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:55:16,818 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [482899562] [2022-01-18 15:55:16,819 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 15:55:16,819 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:55:16,819 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:55:16,820 INFO L229 MonitoredProcess]: Starting monitored process 234 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:55:16,820 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (234)] Waiting until timeout for monitored process [2022-01-18 15:55:16,852 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:55:16,852 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:55:16,853 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2022-01-18 15:55:16,853 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:55:17,139 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:55:17,140 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 3 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 49 [2022-01-18 15:55:17,820 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 15:55:17,820 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:55:18,060 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:55:18,061 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 22 [2022-01-18 15:55:18,069 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:55:18,069 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 7 [2022-01-18 15:55:18,115 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 15:55:18,115 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [482899562] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:55:18,115 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:55:18,115 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 13] total 33 [2022-01-18 15:55:18,115 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2008862713] [2022-01-18 15:55:18,115 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:55:18,115 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-01-18 15:55:18,115 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:55:18,115 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-01-18 15:55:18,115 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=967, Unknown=0, NotChecked=0, Total=1122 [2022-01-18 15:55:18,116 INFO L87 Difference]: Start difference. First operand 19929 states and 94874 transitions. Second operand has 34 states, 34 states have (on average 2.2941176470588234) internal successors, (78), 33 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:55:22,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:55:22,901 INFO L93 Difference]: Finished difference Result 22889 states and 105042 transitions. [2022-01-18 15:55:22,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2022-01-18 15:55:22,902 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.2941176470588234) internal successors, (78), 33 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 15:55:22,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:55:22,973 INFO L225 Difference]: With dead ends: 22889 [2022-01-18 15:55:22,973 INFO L226 Difference]: Without dead ends: 22871 [2022-01-18 15:55:22,974 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 49 SyntacticMatches, 4 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2918 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=1188, Invalid=7742, Unknown=0, NotChecked=0, Total=8930 [2022-01-18 15:55:22,974 INFO L933 BasicCegarLoop]: 94 mSDtfsCounter, 1048 mSDsluCounter, 4519 mSDsCounter, 0 mSdLazyCounter, 5511 mSolverCounterSat, 202 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1048 SdHoareTripleChecker+Valid, 1929 SdHoareTripleChecker+Invalid, 6403 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 202 IncrementalHoareTripleChecker+Valid, 5511 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 690 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-01-18 15:55:22,974 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1048 Valid, 1929 Invalid, 6403 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [202 Valid, 5511 Invalid, 0 Unknown, 690 Unchecked, 2.3s Time] [2022-01-18 15:55:22,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22871 states. [2022-01-18 15:55:23,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22871 to 19989. [2022-01-18 15:55:23,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19989 states, 19988 states have (on average 4.762007204322593) internal successors, (95183), 19988 states have internal predecessors, (95183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:55:23,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19989 states to 19989 states and 95183 transitions. [2022-01-18 15:55:23,651 INFO L78 Accepts]: Start accepts. Automaton has 19989 states and 95183 transitions. Word has length 33 [2022-01-18 15:55:23,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:55:23,651 INFO L470 AbstractCegarLoop]: Abstraction has 19989 states and 95183 transitions. [2022-01-18 15:55:23,651 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 2.2941176470588234) internal successors, (78), 33 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:55:23,651 INFO L276 IsEmpty]: Start isEmpty. Operand 19989 states and 95183 transitions. [2022-01-18 15:55:23,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 15:55:23,704 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:55:23,704 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, 1, 1, 1, 1, 1] [2022-01-18 15:55:23,737 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (234)] Forceful destruction successful, exit code 0 [2022-01-18 15:55:23,919 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable237,234 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:55:23,919 INFO L402 AbstractCegarLoop]: === Iteration 239 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-01-18 15:55:23,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:55:23,920 INFO L85 PathProgramCache]: Analyzing trace with hash 303997783, now seen corresponding path program 123 times [2022-01-18 15:55:23,920 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:55:23,920 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1203287122] [2022-01-18 15:55:23,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:55:23,920 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:55:23,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:55:24,151 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 15:55:24,151 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:55:24,151 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1203287122] [2022-01-18 15:55:24,151 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1203287122] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:55:24,151 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1347375727] [2022-01-18 15:55:24,151 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 15:55:24,151 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:55:24,151 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:55:24,152 INFO L229 MonitoredProcess]: Starting monitored process 235 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:55:24,153 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (235)] Waiting until timeout for monitored process [2022-01-18 15:55:24,183 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-01-18 15:55:24,183 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:55:24,184 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 43 conjunts are in the unsatisfiable core [2022-01-18 15:55:24,184 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:55:24,458 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:55:24,478 INFO L353 Elim1Store]: treesize reduction 14, result has 72.5 percent of original size [2022-01-18 15:55:24,478 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 29 treesize of output 53 [2022-01-18 15:55:24,684 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 15:55:24,684 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:55:24,980 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 15:55:24,980 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1347375727] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:55:24,980 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:55:24,981 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 12] total 33 [2022-01-18 15:55:24,981 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1347627503] [2022-01-18 15:55:24,981 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:55:24,981 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-01-18 15:55:24,981 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:55:24,981 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-01-18 15:55:24,981 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=148, Invalid=974, Unknown=0, NotChecked=0, Total=1122 [2022-01-18 15:55:24,981 INFO L87 Difference]: Start difference. First operand 19989 states and 95183 transitions. Second operand has 34 states, 34 states have (on average 2.4705882352941178) internal successors, (84), 33 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:55:29,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:55:29,353 INFO L93 Difference]: Finished difference Result 23894 states and 108649 transitions. [2022-01-18 15:55:29,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2022-01-18 15:55:29,354 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.4705882352941178) internal successors, (84), 33 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 15:55:29,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:55:29,424 INFO L225 Difference]: With dead ends: 23894 [2022-01-18 15:55:29,424 INFO L226 Difference]: Without dead ends: 23856 [2022-01-18 15:55:29,425 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 42 SyntacticMatches, 4 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2501 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=1096, Invalid=6736, Unknown=0, NotChecked=0, Total=7832 [2022-01-18 15:55:29,425 INFO L933 BasicCegarLoop]: 79 mSDtfsCounter, 1377 mSDsluCounter, 3630 mSDsCounter, 0 mSdLazyCounter, 4487 mSolverCounterSat, 249 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1377 SdHoareTripleChecker+Valid, 1503 SdHoareTripleChecker+Invalid, 4736 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 249 IncrementalHoareTripleChecker+Valid, 4487 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-01-18 15:55:29,425 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1377 Valid, 1503 Invalid, 4736 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [249 Valid, 4487 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-01-18 15:55:29,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23856 states. [2022-01-18 15:55:29,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23856 to 19903. [2022-01-18 15:55:29,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19903 states, 19902 states have (on average 4.760928549894483) internal successors, (94752), 19902 states have internal predecessors, (94752), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:55:30,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19903 states to 19903 states and 94752 transitions. [2022-01-18 15:55:30,041 INFO L78 Accepts]: Start accepts. Automaton has 19903 states and 94752 transitions. Word has length 33 [2022-01-18 15:55:30,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:55:30,041 INFO L470 AbstractCegarLoop]: Abstraction has 19903 states and 94752 transitions. [2022-01-18 15:55:30,041 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 2.4705882352941178) internal successors, (84), 33 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:55:30,041 INFO L276 IsEmpty]: Start isEmpty. Operand 19903 states and 94752 transitions. [2022-01-18 15:55:30,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 15:55:30,083 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:55:30,083 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, 1, 1, 1, 1, 1] [2022-01-18 15:55:30,100 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (235)] Ended with exit code 0 [2022-01-18 15:55:30,283 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 235 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable238 [2022-01-18 15:55:30,283 INFO L402 AbstractCegarLoop]: === Iteration 240 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-01-18 15:55:30,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:55:30,284 INFO L85 PathProgramCache]: Analyzing trace with hash -71060157, now seen corresponding path program 124 times [2022-01-18 15:55:30,284 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:55:30,284 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2078965084] [2022-01-18 15:55:30,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:55:30,284 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:55:30,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:55:30,508 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 15:55:30,509 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:55:30,509 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2078965084] [2022-01-18 15:55:30,509 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2078965084] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:55:30,509 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [185540874] [2022-01-18 15:55:30,509 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 15:55:30,509 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:55:30,509 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:55:30,510 INFO L229 MonitoredProcess]: Starting monitored process 236 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:55:30,510 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (236)] Waiting until timeout for monitored process [2022-01-18 15:55:30,556 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 15:55:30,556 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:55:30,557 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2022-01-18 15:55:30,557 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:55:30,852 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:55:30,852 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 21 [2022-01-18 15:55:30,954 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 15:55:30,954 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:55:31,209 INFO L353 Elim1Store]: treesize reduction 36, result has 50.7 percent of original size [2022-01-18 15:55:31,210 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 27 treesize of output 48 [2022-01-18 15:55:31,270 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:55:31,270 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:55:31,271 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:55:31,271 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:55:31,272 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 27 treesize of output 7 [2022-01-18 15:55:31,318 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 15:55:31,318 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [185540874] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:55:31,318 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:55:31,318 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 32 [2022-01-18 15:55:31,318 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1868416718] [2022-01-18 15:55:31,318 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:55:31,319 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-01-18 15:55:31,319 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:55:31,319 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-01-18 15:55:31,319 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=907, Unknown=0, NotChecked=0, Total=1056 [2022-01-18 15:55:31,319 INFO L87 Difference]: Start difference. First operand 19903 states and 94752 transitions. Second operand has 33 states, 33 states have (on average 2.4545454545454546) internal successors, (81), 32 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:55:36,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:55:36,503 INFO L93 Difference]: Finished difference Result 24130 states and 110129 transitions. [2022-01-18 15:55:36,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2022-01-18 15:55:36,503 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.4545454545454546) internal successors, (81), 32 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 15:55:36,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:55:36,589 INFO L225 Difference]: With dead ends: 24130 [2022-01-18 15:55:36,589 INFO L226 Difference]: Without dead ends: 23909 [2022-01-18 15:55:36,590 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 43 SyntacticMatches, 4 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3323 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=1162, Invalid=8540, Unknown=0, NotChecked=0, Total=9702 [2022-01-18 15:55:36,590 INFO L933 BasicCegarLoop]: 90 mSDtfsCounter, 1226 mSDsluCounter, 3742 mSDsCounter, 0 mSdLazyCounter, 4713 mSolverCounterSat, 224 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1226 SdHoareTripleChecker+Valid, 1495 SdHoareTripleChecker+Invalid, 4937 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 224 IncrementalHoareTripleChecker+Valid, 4713 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2022-01-18 15:55:36,590 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1226 Valid, 1495 Invalid, 4937 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [224 Valid, 4713 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2022-01-18 15:55:36,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23909 states. [2022-01-18 15:55:37,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23909 to 19687. [2022-01-18 15:55:37,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19687 states, 19686 states have (on average 4.763994717057807) internal successors, (93784), 19686 states have internal predecessors, (93784), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:55:37,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19687 states to 19687 states and 93784 transitions. [2022-01-18 15:55:37,227 INFO L78 Accepts]: Start accepts. Automaton has 19687 states and 93784 transitions. Word has length 33 [2022-01-18 15:55:37,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:55:37,228 INFO L470 AbstractCegarLoop]: Abstraction has 19687 states and 93784 transitions. [2022-01-18 15:55:37,228 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.4545454545454546) internal successors, (81), 32 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:55:37,228 INFO L276 IsEmpty]: Start isEmpty. Operand 19687 states and 93784 transitions. [2022-01-18 15:55:37,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 15:55:37,270 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:55:37,270 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, 1, 1, 1, 1, 1] [2022-01-18 15:55:37,285 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (236)] Ended with exit code 0 [2022-01-18 15:55:37,473 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 236 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable239 [2022-01-18 15:55:37,473 INFO L402 AbstractCegarLoop]: === Iteration 241 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-01-18 15:55:37,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:55:37,473 INFO L85 PathProgramCache]: Analyzing trace with hash -426655983, now seen corresponding path program 125 times [2022-01-18 15:55:37,473 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:55:37,473 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1750291458] [2022-01-18 15:55:37,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:55:37,473 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:55:37,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:55:37,659 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 15:55:37,659 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:55:37,659 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1750291458] [2022-01-18 15:55:37,659 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1750291458] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:55:37,659 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [914815355] [2022-01-18 15:55:37,659 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 15:55:37,659 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:55:37,660 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:55:37,660 INFO L229 MonitoredProcess]: Starting monitored process 237 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:55:37,661 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (237)] Waiting until timeout for monitored process [2022-01-18 15:55:37,689 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-01-18 15:55:37,690 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:55:37,690 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2022-01-18 15:55:37,691 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:55:38,002 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:55:38,002 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 21 [2022-01-18 15:55:38,107 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 15:55:38,107 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:55:38,394 INFO L353 Elim1Store]: treesize reduction 36, result has 50.7 percent of original size [2022-01-18 15:55:38,394 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 27 treesize of output 48 [2022-01-18 15:55:38,453 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:55:38,453 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:55:38,454 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:55:38,454 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:55:38,455 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 27 treesize of output 7 [2022-01-18 15:55:38,499 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 15:55:38,499 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [914815355] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:55:38,499 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:55:38,499 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 32 [2022-01-18 15:55:38,499 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1015448043] [2022-01-18 15:55:38,499 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:55:38,500 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-01-18 15:55:38,500 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:55:38,500 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-01-18 15:55:38,500 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=950, Unknown=0, NotChecked=0, Total=1056 [2022-01-18 15:55:38,500 INFO L87 Difference]: Start difference. First operand 19687 states and 93784 transitions. Second operand has 33 states, 33 states have (on average 2.515151515151515) internal successors, (83), 32 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:55:41,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:55:41,548 INFO L93 Difference]: Finished difference Result 21557 states and 101175 transitions. [2022-01-18 15:55:41,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2022-01-18 15:55:41,548 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.515151515151515) internal successors, (83), 32 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 15:55:41,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:55:41,611 INFO L225 Difference]: With dead ends: 21557 [2022-01-18 15:55:41,611 INFO L226 Difference]: Without dead ends: 21383 [2022-01-18 15:55:41,612 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 43 SyntacticMatches, 4 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1550 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=496, Invalid=5054, Unknown=0, NotChecked=0, Total=5550 [2022-01-18 15:55:41,612 INFO L933 BasicCegarLoop]: 75 mSDtfsCounter, 671 mSDsluCounter, 3265 mSDsCounter, 0 mSdLazyCounter, 4398 mSolverCounterSat, 130 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 671 SdHoareTripleChecker+Valid, 1340 SdHoareTripleChecker+Invalid, 4528 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 130 IncrementalHoareTripleChecker+Valid, 4398 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-01-18 15:55:41,612 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [671 Valid, 1340 Invalid, 4528 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [130 Valid, 4398 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-01-18 15:55:41,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21383 states. [2022-01-18 15:55:42,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21383 to 19682. [2022-01-18 15:55:42,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19682 states, 19681 states have (on average 4.772216858899446) internal successors, (93922), 19681 states have internal predecessors, (93922), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:55:42,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19682 states to 19682 states and 93922 transitions. [2022-01-18 15:55:42,120 INFO L78 Accepts]: Start accepts. Automaton has 19682 states and 93922 transitions. Word has length 33 [2022-01-18 15:55:42,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:55:42,120 INFO L470 AbstractCegarLoop]: Abstraction has 19682 states and 93922 transitions. [2022-01-18 15:55:42,120 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.515151515151515) internal successors, (83), 32 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:55:42,120 INFO L276 IsEmpty]: Start isEmpty. Operand 19682 states and 93922 transitions. [2022-01-18 15:55:42,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 15:55:42,164 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:55:42,164 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, 1, 1, 1, 1, 1] [2022-01-18 15:55:42,181 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (237)] Forceful destruction successful, exit code 0 [2022-01-18 15:55:42,371 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable240,237 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:55:42,371 INFO L402 AbstractCegarLoop]: === Iteration 242 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-01-18 15:55:42,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:55:42,372 INFO L85 PathProgramCache]: Analyzing trace with hash -670572553, now seen corresponding path program 126 times [2022-01-18 15:55:42,372 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:55:42,372 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1893215729] [2022-01-18 15:55:42,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:55:42,372 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:55:42,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:55:42,548 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 15:55:42,548 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:55:42,548 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1893215729] [2022-01-18 15:55:42,548 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1893215729] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:55:42,548 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [653533994] [2022-01-18 15:55:42,548 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 15:55:42,548 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:55:42,548 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:55:42,549 INFO L229 MonitoredProcess]: Starting monitored process 238 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:55:42,549 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (238)] Waiting until timeout for monitored process [2022-01-18 15:55:42,578 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 15:55:42,579 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:55:42,579 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2022-01-18 15:55:42,580 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:55:42,966 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:55:42,986 INFO L353 Elim1Store]: treesize reduction 14, result has 72.5 percent of original size [2022-01-18 15:55:42,986 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 35 treesize of output 59 [2022-01-18 15:55:43,137 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 15:55:43,137 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:55:43,489 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 15:55:43,490 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [653533994] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:55:43,490 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:55:43,490 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 34 [2022-01-18 15:55:43,490 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1518247256] [2022-01-18 15:55:43,490 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:55:43,490 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-01-18 15:55:43,490 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:55:43,490 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-01-18 15:55:43,490 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=1074, Unknown=0, NotChecked=0, Total=1190 [2022-01-18 15:55:43,490 INFO L87 Difference]: Start difference. First operand 19682 states and 93922 transitions. Second operand has 35 states, 35 states have (on average 2.4285714285714284) internal successors, (85), 34 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:55:49,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:55:49,093 INFO L93 Difference]: Finished difference Result 23350 states and 108122 transitions. [2022-01-18 15:55:49,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 102 states. [2022-01-18 15:55:49,094 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.4285714285714284) internal successors, (85), 34 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 15:55:49,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:55:49,162 INFO L225 Difference]: With dead ends: 23350 [2022-01-18 15:55:49,162 INFO L226 Difference]: Without dead ends: 23242 [2022-01-18 15:55:49,163 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 42 SyntacticMatches, 3 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3810 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=980, Invalid=11902, Unknown=0, NotChecked=0, Total=12882 [2022-01-18 15:55:49,163 INFO L933 BasicCegarLoop]: 98 mSDtfsCounter, 1155 mSDsluCounter, 4617 mSDsCounter, 0 mSdLazyCounter, 6035 mSolverCounterSat, 230 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1155 SdHoareTripleChecker+Valid, 1876 SdHoareTripleChecker+Invalid, 6265 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 230 IncrementalHoareTripleChecker+Valid, 6035 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2022-01-18 15:55:49,163 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1155 Valid, 1876 Invalid, 6265 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [230 Valid, 6035 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2022-01-18 15:55:49,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23242 states. [2022-01-18 15:55:49,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23242 to 19868. [2022-01-18 15:55:49,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19868 states, 19867 states have (on average 4.778980218452711) internal successors, (94944), 19867 states have internal predecessors, (94944), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:55:49,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19868 states to 19868 states and 94944 transitions. [2022-01-18 15:55:49,642 INFO L78 Accepts]: Start accepts. Automaton has 19868 states and 94944 transitions. Word has length 33 [2022-01-18 15:55:49,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:55:49,642 INFO L470 AbstractCegarLoop]: Abstraction has 19868 states and 94944 transitions. [2022-01-18 15:55:49,642 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.4285714285714284) internal successors, (85), 34 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:55:49,642 INFO L276 IsEmpty]: Start isEmpty. Operand 19868 states and 94944 transitions. [2022-01-18 15:55:49,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 15:55:49,683 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:55:49,683 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, 1, 1, 1, 1, 1] [2022-01-18 15:55:49,698 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (238)] Ended with exit code 0 [2022-01-18 15:55:49,883 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable241,238 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:55:49,883 INFO L402 AbstractCegarLoop]: === Iteration 243 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-01-18 15:55:49,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:55:49,884 INFO L85 PathProgramCache]: Analyzing trace with hash -787468167, now seen corresponding path program 127 times [2022-01-18 15:55:49,884 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:55:49,884 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1910417337] [2022-01-18 15:55:49,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:55:49,884 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:55:49,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:55:50,050 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 15:55:50,050 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:55:50,050 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1910417337] [2022-01-18 15:55:50,050 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1910417337] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:55:50,050 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [728365675] [2022-01-18 15:55:50,050 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 15:55:50,050 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:55:50,050 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:55:50,051 INFO L229 MonitoredProcess]: Starting monitored process 239 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:55:50,051 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (239)] Waiting until timeout for monitored process [2022-01-18 15:55:50,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:55:50,080 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2022-01-18 15:55:50,080 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:55:50,406 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:55:50,406 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 21 [2022-01-18 15:55:50,508 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 15:55:50,508 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:55:50,768 INFO L353 Elim1Store]: treesize reduction 36, result has 50.7 percent of original size [2022-01-18 15:55:50,768 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 27 treesize of output 48 [2022-01-18 15:55:50,814 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:55:50,815 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:55:50,815 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:55:50,816 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:55:50,817 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 27 treesize of output 7 [2022-01-18 15:55:50,862 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 15:55:50,862 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [728365675] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:55:50,862 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:55:50,862 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 31 [2022-01-18 15:55:50,862 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1131648953] [2022-01-18 15:55:50,862 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:55:50,862 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-01-18 15:55:50,862 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:55:50,862 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-01-18 15:55:50,862 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=868, Unknown=0, NotChecked=0, Total=992 [2022-01-18 15:55:50,863 INFO L87 Difference]: Start difference. First operand 19868 states and 94944 transitions. Second operand has 32 states, 32 states have (on average 2.59375) internal successors, (83), 31 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:55:54,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:55:54,003 INFO L93 Difference]: Finished difference Result 24624 states and 114063 transitions. [2022-01-18 15:55:54,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2022-01-18 15:55:54,003 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.59375) internal successors, (83), 31 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 15:55:54,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:55:54,082 INFO L225 Difference]: With dead ends: 24624 [2022-01-18 15:55:54,082 INFO L226 Difference]: Without dead ends: 24563 [2022-01-18 15:55:54,083 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 44 SyntacticMatches, 4 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1985 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=712, Invalid=5930, Unknown=0, NotChecked=0, Total=6642 [2022-01-18 15:55:54,083 INFO L933 BasicCegarLoop]: 91 mSDtfsCounter, 905 mSDsluCounter, 3421 mSDsCounter, 0 mSdLazyCounter, 4522 mSolverCounterSat, 152 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 905 SdHoareTripleChecker+Valid, 1435 SdHoareTripleChecker+Invalid, 4674 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 152 IncrementalHoareTripleChecker+Valid, 4522 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-01-18 15:55:54,083 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [905 Valid, 1435 Invalid, 4674 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [152 Valid, 4522 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-01-18 15:55:54,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24563 states. [2022-01-18 15:55:54,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24563 to 20222. [2022-01-18 15:55:54,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20222 states, 20221 states have (on average 4.7920973245635725) internal successors, (96901), 20221 states have internal predecessors, (96901), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:55:54,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20222 states to 20222 states and 96901 transitions. [2022-01-18 15:55:54,724 INFO L78 Accepts]: Start accepts. Automaton has 20222 states and 96901 transitions. Word has length 33 [2022-01-18 15:55:54,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:55:54,725 INFO L470 AbstractCegarLoop]: Abstraction has 20222 states and 96901 transitions. [2022-01-18 15:55:54,725 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.59375) internal successors, (83), 31 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:55:54,725 INFO L276 IsEmpty]: Start isEmpty. Operand 20222 states and 96901 transitions. [2022-01-18 15:55:54,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 15:55:54,766 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:55:54,766 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, 1, 1, 1, 1, 1] [2022-01-18 15:55:54,781 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (239)] Ended with exit code 0 [2022-01-18 15:55:54,966 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable242,239 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:55:54,966 INFO L402 AbstractCegarLoop]: === Iteration 244 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-01-18 15:55:54,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:55:54,967 INFO L85 PathProgramCache]: Analyzing trace with hash 515804439, now seen corresponding path program 128 times [2022-01-18 15:55:54,967 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:55:54,967 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1884709274] [2022-01-18 15:55:54,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:55:54,967 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:55:54,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:55:55,129 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 15:55:55,129 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:55:55,129 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1884709274] [2022-01-18 15:55:55,129 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1884709274] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:55:55,129 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [146506407] [2022-01-18 15:55:55,129 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 15:55:55,129 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:55:55,129 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:55:55,130 INFO L229 MonitoredProcess]: Starting monitored process 240 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:55:55,130 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (240)] Waiting until timeout for monitored process [2022-01-18 15:55:55,159 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:55:55,159 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:55:55,160 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2022-01-18 15:55:55,160 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:55:55,440 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:55:55,440 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 3 new quantified variables, introduced 3 case distinctions, treesize of input 29 treesize of output 45 [2022-01-18 15:55:55,932 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 15:55:55,933 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:55:56,096 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:55:56,096 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 22 [2022-01-18 15:55:56,105 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:55:56,105 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 7 [2022-01-18 15:55:56,149 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 15:55:56,149 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [146506407] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:55:56,149 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:55:56,149 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14, 13] total 28 [2022-01-18 15:55:56,149 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1113414176] [2022-01-18 15:55:56,149 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:55:56,150 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-01-18 15:55:56,150 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:55:56,150 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-01-18 15:55:56,150 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=697, Unknown=0, NotChecked=0, Total=812 [2022-01-18 15:55:56,150 INFO L87 Difference]: Start difference. First operand 20222 states and 96901 transitions. Second operand has 29 states, 29 states have (on average 2.3793103448275863) 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 15:55:57,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:55:57,919 INFO L93 Difference]: Finished difference Result 21298 states and 101161 transitions. [2022-01-18 15:55:57,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-01-18 15:55:57,920 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.3793103448275863) 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 33 [2022-01-18 15:55:57,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:55:57,982 INFO L225 Difference]: With dead ends: 21298 [2022-01-18 15:55:57,982 INFO L226 Difference]: Without dead ends: 21287 [2022-01-18 15:55:57,983 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 50 SyntacticMatches, 4 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 757 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=391, Invalid=2471, Unknown=0, NotChecked=0, Total=2862 [2022-01-18 15:55:57,983 INFO L933 BasicCegarLoop]: 68 mSDtfsCounter, 496 mSDsluCounter, 2405 mSDsCounter, 0 mSdLazyCounter, 2583 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 496 SdHoareTripleChecker+Valid, 983 SdHoareTripleChecker+Invalid, 3500 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 2583 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 857 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-01-18 15:55:57,983 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [496 Valid, 983 Invalid, 3500 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 2583 Invalid, 0 Unknown, 857 Unchecked, 1.0s Time] [2022-01-18 15:55:58,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21287 states. [2022-01-18 15:55:58,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21287 to 20279. [2022-01-18 15:55:58,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20279 states, 20278 states have (on average 4.7906105138573825) internal successors, (97144), 20278 states have internal predecessors, (97144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:55:58,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20279 states to 20279 states and 97144 transitions. [2022-01-18 15:55:58,424 INFO L78 Accepts]: Start accepts. Automaton has 20279 states and 97144 transitions. Word has length 33 [2022-01-18 15:55:58,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:55:58,424 INFO L470 AbstractCegarLoop]: Abstraction has 20279 states and 97144 transitions. [2022-01-18 15:55:58,424 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.3793103448275863) 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 15:55:58,424 INFO L276 IsEmpty]: Start isEmpty. Operand 20279 states and 97144 transitions. [2022-01-18 15:55:58,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 15:55:58,545 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:55:58,545 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, 1, 1, 1, 1, 1] Received shutdown request... [2022-01-18 15:55:58,560 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (240)] Ended with exit code 0 [2022-01-18 15:55:58,745 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable243,240 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:55:58,746 INFO L402 AbstractCegarLoop]: === Iteration 245 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-01-18 15:55:58,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:55:58,747 INFO L85 PathProgramCache]: Analyzing trace with hash 319290934, now seen corresponding path program 19 times [2022-01-18 15:55:58,747 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:55:58,748 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2022-01-18 15:55:58,749 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0ASSERT_VIOLATIONASSERT (10 of 11 remaining) [2022-01-18 15:55:58,750 WARN L594 AbstractCegarLoop]: Verification canceled: while BasicCegarLoop was analyzing trace of length 34 with TraceHistMax 2,while AutomatonFreeRefinementEngine was Timeout during feasibility check between null and IpTcStrategyModuleSmtInterpolCraig [241921543]. [2022-01-18 15:55:58,751 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread1Err4INUSE_VIOLATION (9 of 11 remaining) [2022-01-18 15:55:58,751 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread1Err6INUSE_VIOLATION (8 of 11 remaining) [2022-01-18 15:55:58,751 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr2INUSE_VIOLATION (7 of 11 remaining) [2022-01-18 15:55:58,751 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr7INUSE_VIOLATION (6 of 11 remaining) [2022-01-18 15:55:58,751 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread4Err0INUSE_VIOLATION (5 of 11 remaining) [2022-01-18 15:55:58,751 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread4Err8INUSE_VIOLATION (4 of 11 remaining) [2022-01-18 15:55:58,751 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread1Thread1of1ForFork1Err3INUSE_VIOLATION (3 of 11 remaining) [2022-01-18 15:55:58,751 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread1Thread1of1ForFork1Err5INUSE_VIOLATION (2 of 11 remaining) [2022-01-18 15:55:58,751 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread4Thread1of1ForFork4Err1INUSE_VIOLATION (1 of 11 remaining) [2022-01-18 15:55:58,751 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread4Thread1of1ForFork4Err9INUSE_VIOLATION (0 of 11 remaining) [2022-01-18 15:55:58,753 INFO L732 BasicCegarLoop]: Path program histogram: [128, 30, 29, 28, 19, 3, 2, 2, 2, 1, 1] [2022-01-18 15:55:58,755 INFO L229 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2022-01-18 15:55:58,755 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2022-01-18 15:55:58,756 INFO L202 PluginConnector]: Adding new model parallel-sum-2.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.01 03:55:58 BasicIcfg [2022-01-18 15:55:58,756 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-01-18 15:55:58,762 INFO L158 Benchmark]: Toolchain (without parser) took 765364.13ms. Allocated memory was 429.9MB in the beginning and 2.8GB in the end (delta: 2.3GB). Free memory was 392.7MB in the beginning and 2.0GB in the end (delta: -1.6GB). Peak memory consumption was 1.9GB. Max. memory is 16.0GB. [2022-01-18 15:55:58,762 INFO L158 Benchmark]: Boogie PL CUP Parser took 0.11ms. Allocated memory is still 429.9MB. Free memory is still 393.9MB. There was no memory consumed. Max. memory is 16.0GB. [2022-01-18 15:55:58,762 INFO L158 Benchmark]: Boogie Procedure Inliner took 16.85ms. Allocated memory is still 429.9MB. Free memory was 392.6MB in the beginning and 391.0MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2022-01-18 15:55:58,762 INFO L158 Benchmark]: Boogie Preprocessor took 25.00ms. Allocated memory is still 429.9MB. Free memory was 391.0MB in the beginning and 390.0MB in the end (delta: 1.0MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2022-01-18 15:55:58,763 INFO L158 Benchmark]: RCFGBuilder took 265.58ms. Allocated memory is still 429.9MB. Free memory was 390.0MB in the beginning and 379.4MB in the end (delta: 10.6MB). Peak memory consumption was 10.5MB. Max. memory is 16.0GB. [2022-01-18 15:55:58,763 INFO L158 Benchmark]: TraceAbstraction took 765047.23ms. Allocated memory was 429.9MB in the beginning and 2.8GB in the end (delta: 2.3GB). Free memory was 378.9MB in the beginning and 2.0GB in the end (delta: -1.6GB). Peak memory consumption was 1.9GB. Max. memory is 16.0GB. [2022-01-18 15:55:58,763 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 0.11ms. Allocated memory is still 429.9MB. Free memory is still 393.9MB. There was no memory consumed. Max. memory is 16.0GB. * Boogie Procedure Inliner took 16.85ms. Allocated memory is still 429.9MB. Free memory was 392.6MB in the beginning and 391.0MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * Boogie Preprocessor took 25.00ms. Allocated memory is still 429.9MB. Free memory was 391.0MB in the beginning and 390.0MB in the end (delta: 1.0MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * RCFGBuilder took 265.58ms. Allocated memory is still 429.9MB. Free memory was 390.0MB in the beginning and 379.4MB in the end (delta: 10.6MB). Peak memory consumption was 10.5MB. Max. memory is 16.0GB. * TraceAbstraction took 765047.23ms. Allocated memory was 429.9MB in the beginning and 2.8GB in the end (delta: 2.3GB). Free memory was 378.9MB in the beginning and 2.0GB in the end (delta: -1.6GB). Peak memory consumption was 1.9GB. 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: 107]: Timeout (TraceAbstraction) Unable to prove that assertion always holds Cancelled while BasicCegarLoop was analyzing trace of length 34 with TraceHistMax 2,while AutomatonFreeRefinementEngine was Timeout during feasibility check between null and IpTcStrategyModuleSmtInterpolCraig [241921543]. - TimeoutResultAtElement [Line: 50]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was analyzing trace of length 34 with TraceHistMax 2,while AutomatonFreeRefinementEngine was Timeout during feasibility check between null and IpTcStrategyModuleSmtInterpolCraig [241921543]. - TimeoutResultAtElement [Line: 53]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was analyzing trace of length 34 with TraceHistMax 2,while AutomatonFreeRefinementEngine was Timeout during feasibility check between null and IpTcStrategyModuleSmtInterpolCraig [241921543]. - TimeoutResultAtElement [Line: 102]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was analyzing trace of length 34 with TraceHistMax 2,while AutomatonFreeRefinementEngine was Timeout during feasibility check between null and IpTcStrategyModuleSmtInterpolCraig [241921543]. - TimeoutResultAtElement [Line: 102]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was analyzing trace of length 34 with TraceHistMax 2,while AutomatonFreeRefinementEngine was Timeout during feasibility check between null and IpTcStrategyModuleSmtInterpolCraig [241921543]. - TimeoutResultAtElement [Line: 87]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was analyzing trace of length 34 with TraceHistMax 2,while AutomatonFreeRefinementEngine was Timeout during feasibility check between null and IpTcStrategyModuleSmtInterpolCraig [241921543]. - TimeoutResultAtElement [Line: 90]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was analyzing trace of length 34 with TraceHistMax 2,while AutomatonFreeRefinementEngine was Timeout during feasibility check between null and IpTcStrategyModuleSmtInterpolCraig [241921543]. - TimeoutResultAtElement [Line: 50]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was analyzing trace of length 34 with TraceHistMax 2,while AutomatonFreeRefinementEngine was Timeout during feasibility check between null and IpTcStrategyModuleSmtInterpolCraig [241921543]. - TimeoutResultAtElement [Line: 53]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was analyzing trace of length 34 with TraceHistMax 2,while AutomatonFreeRefinementEngine was Timeout during feasibility check between null and IpTcStrategyModuleSmtInterpolCraig [241921543]. - TimeoutResultAtElement [Line: 90]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was analyzing trace of length 34 with TraceHistMax 2,while AutomatonFreeRefinementEngine was Timeout during feasibility check between null and IpTcStrategyModuleSmtInterpolCraig [241921543]. - TimeoutResultAtElement [Line: 87]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was analyzing trace of length 34 with TraceHistMax 2,while AutomatonFreeRefinementEngine was Timeout during feasibility check between null and IpTcStrategyModuleSmtInterpolCraig [241921543]. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 13 procedures, 76 locations, 11 error locations. Started 1 CEGAR loops. OverallTime: 764.9s, OverallIterations: 245, TraceHistogramMax: 2, PathProgramHistogramMax: 128, EmptinessCheckTime: 4.0s, AutomataDifference: 468.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.1s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 129916 SdHoareTripleChecker+Valid, 252.8s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 129916 mSDsluCounter, 202155 SdHoareTripleChecker+Invalid, 212.1s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 19659 IncrementalHoareTripleChecker+Unchecked, 497421 mSDsCounter, 20137 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 637937 IncrementalHoareTripleChecker+Invalid, 677733 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 20137 mSolverCounterUnsat, 12719 mSDtfsCounter, 637937 mSolverCounterSat, 1.7s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 23535 GetRequests, 10746 SyntacticMatches, 852 SemanticMatches, 11937 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 215972 ImplicationChecksByTransitivity, 263.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=20279occurred in iteration=244, InterpolantAutomatonStates: 9419, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 45.4s AutomataMinimizationTime, 244 MinimizatonAttempts, 317437 StatesRemovedByMinimization, 244 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 1.1s SsaConstructionTime, 2.9s SatisfiabilityAnalysisTime, 189.8s InterpolantComputationTime, 14933 NumberOfCodeBlocks, 14933 NumberOfCodeBlocksAsserted, 771 NumberOfCheckSat, 21612 ConstructedInterpolants, 295 QuantifiedInterpolants, 392620 SizeOfPredicates, 3159 NumberOfNonLiveVariables, 32237 ConjunctsInSsa, 8080 ConjunctsInUnsatCore, 722 InterpolantComputations, 5 PerfectInterpolantSequences, 79/3558 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