/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/automizer/BvToInt/svcomp-Reach-64bit-Automizer_Bitvector.epf -i ../../../trunk/examples/svcomp/bitvector-regression/recHanoi03-1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-a10ec3b [2022-01-10 02:40:40,734 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-10 02:40:40,736 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-10 02:40:40,789 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-01-10 02:40:40,822 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/BvToInt/svcomp-Reach-64bit-Automizer_Bitvector.epf [2022-01-10 02:40:40,837 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-10 02:40:40,838 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-10 02:40:40,838 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-01-10 02:40:40,838 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-01-10 02:40:40,838 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-01-10 02:40:40,839 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-01-10 02:40:40,839 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-01-10 02:40:40,839 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-01-10 02:40:40,839 INFO L138 SettingsManager]: * Use SBE=true [2022-01-10 02:40:40,839 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-10 02:40:40,839 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-10 02:40:40,839 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-10 02:40:40,840 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-10 02:40:40,840 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-10 02:40:40,840 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-10 02:40:40,840 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-01-10 02:40:40,840 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-01-10 02:40:40,840 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-01-10 02:40:40,840 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-10 02:40:40,840 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-10 02:40:40,840 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-10 02:40:40,840 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-10 02:40:40,841 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-10 02:40:40,841 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-10 02:40:40,841 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-10 02:40:40,841 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-01-10 02:40:40,841 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-01-10 02:40:40,841 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2022-01-10 02:40:40,841 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-01-10 02:40:40,841 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-01-10 02:40:40,841 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-01-10 02:40:40,841 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-01-10 02:40:40,842 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-01-10 02:40:40,842 INFO L138 SettingsManager]: * Logic for external solver=AUFBV 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-10 02:40:41,027 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-10 02:40:41,044 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-10 02:40:41,045 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-10 02:40:41,046 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-10 02:40:41,047 INFO L275 PluginConnector]: CDTParser initialized [2022-01-10 02:40:41,048 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/bitvector-regression/recHanoi03-1.c [2022-01-10 02:40:41,093 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/48118ddec/d52c0e65d5cd4cc5af012e1e9ebd15f4/FLAGa21667799 [2022-01-10 02:40:41,485 INFO L306 CDTParser]: Found 1 translation units. [2022-01-10 02:40:41,486 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/bitvector-regression/recHanoi03-1.c [2022-01-10 02:40:41,494 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/48118ddec/d52c0e65d5cd4cc5af012e1e9ebd15f4/FLAGa21667799 [2022-01-10 02:40:41,505 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/48118ddec/d52c0e65d5cd4cc5af012e1e9ebd15f4 [2022-01-10 02:40:41,507 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-10 02:40:41,510 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-01-10 02:40:41,511 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-10 02:40:41,511 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-10 02:40:41,514 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-10 02:40:41,514 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 02:40:41" (1/1) ... [2022-01-10 02:40:41,515 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2009df5d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 02:40:41, skipping insertion in model container [2022-01-10 02:40:41,515 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 02:40:41" (1/1) ... [2022-01-10 02:40:41,520 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-10 02:40:41,530 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-10 02:40:41,698 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/bitvector-regression/recHanoi03-1.c[838,851] [2022-01-10 02:40:41,701 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-10 02:40:41,710 INFO L203 MainTranslator]: Completed pre-run [2022-01-10 02:40:41,722 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/bitvector-regression/recHanoi03-1.c[838,851] [2022-01-10 02:40:41,724 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-10 02:40:41,733 INFO L208 MainTranslator]: Completed translation [2022-01-10 02:40:41,733 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 02:40:41 WrapperNode [2022-01-10 02:40:41,734 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-10 02:40:41,735 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-01-10 02:40:41,735 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-01-10 02:40:41,735 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-01-10 02:40:41,740 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 02:40:41" (1/1) ... [2022-01-10 02:40:41,746 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 02:40:41" (1/1) ... [2022-01-10 02:40:41,756 INFO L137 Inliner]: procedures = 13, calls = 9, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 24 [2022-01-10 02:40:41,757 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-01-10 02:40:41,757 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-10 02:40:41,757 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-10 02:40:41,757 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-10 02:40:41,762 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 02:40:41" (1/1) ... [2022-01-10 02:40:41,762 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 02:40:41" (1/1) ... [2022-01-10 02:40:41,765 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 02:40:41" (1/1) ... [2022-01-10 02:40:41,765 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 02:40:41" (1/1) ... [2022-01-10 02:40:41,773 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 02:40:41" (1/1) ... [2022-01-10 02:40:41,774 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 02:40:41" (1/1) ... [2022-01-10 02:40:41,777 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 02:40:41" (1/1) ... [2022-01-10 02:40:41,779 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-10 02:40:41,780 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-10 02:40:41,781 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-10 02:40:41,781 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-10 02:40:41,782 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 02:40:41" (1/1) ... [2022-01-10 02:40:41,786 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-10 02:40:41,793 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 02:40:41,833 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) [2022-01-10 02:40:41,852 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 [2022-01-10 02:40:41,862 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-10 02:40:41,862 INFO L130 BoogieDeclarations]: Found specification of procedure hanoi [2022-01-10 02:40:41,862 INFO L138 BoogieDeclarations]: Found implementation of procedure hanoi [2022-01-10 02:40:41,862 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-10 02:40:41,862 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-10 02:40:41,862 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-01-10 02:40:41,905 INFO L234 CfgBuilder]: Building ICFG [2022-01-10 02:40:41,906 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-10 02:40:42,008 INFO L275 CfgBuilder]: Performing block encoding [2022-01-10 02:40:42,011 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-10 02:40:42,012 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2022-01-10 02:40:42,013 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 02:40:42 BoogieIcfgContainer [2022-01-10 02:40:42,013 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-10 02:40:42,014 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-10 02:40:42,014 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-10 02:40:42,020 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-10 02:40:42,021 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 10.01 02:40:41" (1/3) ... [2022-01-10 02:40:42,021 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3738644d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 02:40:42, skipping insertion in model container [2022-01-10 02:40:42,021 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 02:40:41" (2/3) ... [2022-01-10 02:40:42,022 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3738644d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 02:40:42, skipping insertion in model container [2022-01-10 02:40:42,022 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 02:40:42" (3/3) ... [2022-01-10 02:40:42,023 INFO L111 eAbstractionObserver]: Analyzing ICFG recHanoi03-1.c [2022-01-10 02:40:42,027 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-01-10 02:40:42,027 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-10 02:40:42,062 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-10 02:40:42,067 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=PETRI_NET, 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 [2022-01-10 02:40:42,068 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-01-10 02:40:42,079 INFO L276 IsEmpty]: Start isEmpty. Operand has 17 states, 12 states have (on average 1.3333333333333333) internal successors, (16), 13 states have internal predecessors, (16), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-10 02:40:42,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-01-10 02:40:42,083 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 02:40:42,083 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 02:40:42,083 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 02:40:42,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 02:40:42,089 INFO L85 PathProgramCache]: Analyzing trace with hash -2087939196, now seen corresponding path program 1 times [2022-01-10 02:40:42,099 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 02:40:42,099 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [368663538] [2022-01-10 02:40:42,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 02:40:42,100 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 02:40:42,100 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 02:40:42,109 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 02:40:42,142 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2022-01-10 02:40:42,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 02:40:42,160 INFO L263 TraceCheckSpWp]: Trace formula consists of 27 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-10 02:40:42,163 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 02:40:42,356 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 02:40:42,357 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 02:40:42,357 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 02:40:42,358 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [368663538] [2022-01-10 02:40:42,358 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [368663538] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 02:40:42,358 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 02:40:42,358 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-01-10 02:40:42,359 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1056066514] [2022-01-10 02:40:42,360 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 02:40:42,363 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-01-10 02:40:42,363 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 02:40:42,387 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-01-10 02:40:42,387 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-01-10 02:40:42,389 INFO L87 Difference]: Start difference. First operand has 17 states, 12 states have (on average 1.3333333333333333) internal successors, (16), 13 states have internal predecessors, (16), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 7 states, 6 states have (on average 1.5) internal successors, (9), 6 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-10 02:40:42,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 02:40:42,480 INFO L93 Difference]: Finished difference Result 32 states and 34 transitions. [2022-01-10 02:40:42,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-10 02:40:42,482 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 1.5) internal successors, (9), 6 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2022-01-10 02:40:42,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 02:40:42,489 INFO L225 Difference]: With dead ends: 32 [2022-01-10 02:40:42,489 INFO L226 Difference]: Without dead ends: 16 [2022-01-10 02:40:42,493 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-01-10 02:40:42,496 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 17 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 02:40:42,497 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 53 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-10 02:40:42,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2022-01-10 02:40:42,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2022-01-10 02:40:42,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 11 states have (on average 1.0909090909090908) internal successors, (12), 12 states have internal predecessors, (12), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-10 02:40:42,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 17 transitions. [2022-01-10 02:40:42,526 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 17 transitions. Word has length 11 [2022-01-10 02:40:42,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 02:40:42,526 INFO L470 AbstractCegarLoop]: Abstraction has 16 states and 17 transitions. [2022-01-10 02:40:42,527 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 1.5) internal successors, (9), 6 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-10 02:40:42,527 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 17 transitions. [2022-01-10 02:40:42,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-01-10 02:40:42,529 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 02:40:42,529 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 02:40:42,535 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Ended with exit code 0 [2022-01-10 02:40:42,734 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 02:40:42,735 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 02:40:42,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 02:40:42,738 INFO L85 PathProgramCache]: Analyzing trace with hash -2053638732, now seen corresponding path program 1 times [2022-01-10 02:40:42,738 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 02:40:42,738 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1246470947] [2022-01-10 02:40:42,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 02:40:42,739 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 02:40:42,739 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 02:40:42,740 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 02:40:42,742 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2022-01-10 02:40:42,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 02:40:42,763 INFO L263 TraceCheckSpWp]: Trace formula consists of 35 conjuncts, 12 conjunts are in the unsatisfiable core [2022-01-10 02:40:42,768 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 02:40:42,931 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-10 02:40:42,931 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 02:40:43,523 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-10 02:40:43,523 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 02:40:43,523 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1246470947] [2022-01-10 02:40:43,524 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1246470947] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 02:40:43,524 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 02:40:43,524 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2022-01-10 02:40:43,525 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1339086179] [2022-01-10 02:40:43,527 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 02:40:43,529 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-10 02:40:43,530 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 02:40:43,530 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-10 02:40:43,531 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=197, Unknown=0, NotChecked=0, Total=240 [2022-01-10 02:40:43,532 INFO L87 Difference]: Start difference. First operand 16 states and 17 transitions. Second operand has 16 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 12 states have internal predecessors, (22), 4 states have call successors, (4), 1 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-01-10 02:40:43,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 02:40:43,794 INFO L93 Difference]: Finished difference Result 28 states and 30 transitions. [2022-01-10 02:40:43,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-10 02:40:43,794 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 12 states have internal predecessors, (22), 4 states have call successors, (4), 1 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 17 [2022-01-10 02:40:43,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 02:40:43,795 INFO L225 Difference]: With dead ends: 28 [2022-01-10 02:40:43,795 INFO L226 Difference]: Without dead ends: 22 [2022-01-10 02:40:43,796 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=90, Invalid=416, Unknown=0, NotChecked=0, Total=506 [2022-01-10 02:40:43,796 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 16 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 106 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 124 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 6 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 02:40:43,797 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 66 Invalid, 124 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 106 Invalid, 0 Unknown, 6 Unchecked, 0.1s Time] [2022-01-10 02:40:43,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2022-01-10 02:40:43,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2022-01-10 02:40:43,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 15 states have (on average 1.0666666666666667) internal successors, (16), 16 states have internal predecessors, (16), 2 states have call successors, (2), 1 states have call predecessors, (2), 4 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-10 02:40:43,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 23 transitions. [2022-01-10 02:40:43,800 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 23 transitions. Word has length 17 [2022-01-10 02:40:43,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 02:40:43,800 INFO L470 AbstractCegarLoop]: Abstraction has 22 states and 23 transitions. [2022-01-10 02:40:43,800 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 12 states have internal predecessors, (22), 4 states have call successors, (4), 1 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-01-10 02:40:43,800 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 23 transitions. [2022-01-10 02:40:43,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-01-10 02:40:43,801 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 02:40:43,801 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 02:40:43,809 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2022-01-10 02:40:44,001 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 02:40:44,002 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 02:40:44,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 02:40:44,003 INFO L85 PathProgramCache]: Analyzing trace with hash -491101836, now seen corresponding path program 2 times [2022-01-10 02:40:44,003 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 02:40:44,003 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [649289562] [2022-01-10 02:40:44,003 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-10 02:40:44,003 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 02:40:44,004 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 02:40:44,006 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 02:40:44,022 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2022-01-10 02:40:44,031 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-10 02:40:44,031 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 02:40:44,032 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-10 02:40:44,034 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 02:40:44,218 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-01-10 02:40:44,218 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 02:40:45,441 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-10 02:40:45,441 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 02:40:45,442 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [649289562] [2022-01-10 02:40:45,442 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [649289562] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 02:40:45,442 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 02:40:45,442 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15] total 26 [2022-01-10 02:40:45,442 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [464354098] [2022-01-10 02:40:45,442 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 02:40:45,443 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-10 02:40:45,443 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 02:40:45,443 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-10 02:40:45,444 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=569, Unknown=0, NotChecked=0, Total=650 [2022-01-10 02:40:45,444 INFO L87 Difference]: Start difference. First operand 22 states and 23 transitions. Second operand has 26 states, 25 states have (on average 1.36) internal successors, (34), 18 states have internal predecessors, (34), 6 states have call successors, (6), 1 states have call predecessors, (6), 8 states have return successors, (8), 8 states have call predecessors, (8), 6 states have call successors, (8) [2022-01-10 02:40:45,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 02:40:45,993 INFO L93 Difference]: Finished difference Result 34 states and 36 transitions. [2022-01-10 02:40:45,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-01-10 02:40:45,993 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 1.36) internal successors, (34), 18 states have internal predecessors, (34), 6 states have call successors, (6), 1 states have call predecessors, (6), 8 states have return successors, (8), 8 states have call predecessors, (8), 6 states have call successors, (8) Word has length 29 [2022-01-10 02:40:45,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 02:40:45,994 INFO L225 Difference]: With dead ends: 34 [2022-01-10 02:40:45,994 INFO L226 Difference]: Without dead ends: 28 [2022-01-10 02:40:45,995 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 185 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=177, Invalid=1229, Unknown=0, NotChecked=0, Total=1406 [2022-01-10 02:40:45,995 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 25 mSDsluCounter, 115 mSDsCounter, 0 mSdLazyCounter, 168 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 127 SdHoareTripleChecker+Invalid, 270 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 168 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 70 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-10 02:40:45,996 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 127 Invalid, 270 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 168 Invalid, 0 Unknown, 70 Unchecked, 0.2s Time] [2022-01-10 02:40:45,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2022-01-10 02:40:45,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2022-01-10 02:40:45,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 19 states have (on average 1.0526315789473684) internal successors, (20), 20 states have internal predecessors, (20), 2 states have call successors, (2), 1 states have call predecessors, (2), 6 states have return successors, (7), 6 states have call predecessors, (7), 2 states have call successors, (7) [2022-01-10 02:40:45,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 29 transitions. [2022-01-10 02:40:46,000 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 29 transitions. Word has length 29 [2022-01-10 02:40:46,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 02:40:46,000 INFO L470 AbstractCegarLoop]: Abstraction has 28 states and 29 transitions. [2022-01-10 02:40:46,000 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 1.36) internal successors, (34), 18 states have internal predecessors, (34), 6 states have call successors, (6), 1 states have call predecessors, (6), 8 states have return successors, (8), 8 states have call predecessors, (8), 6 states have call successors, (8) [2022-01-10 02:40:46,000 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 29 transitions. [2022-01-10 02:40:46,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-01-10 02:40:46,001 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 02:40:46,001 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 02:40:46,007 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2022-01-10 02:40:46,207 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 02:40:46,207 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 02:40:46,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 02:40:46,208 INFO L85 PathProgramCache]: Analyzing trace with hash -492655308, now seen corresponding path program 3 times [2022-01-10 02:40:46,208 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 02:40:46,208 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [91216820] [2022-01-10 02:40:46,208 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-10 02:40:46,209 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 02:40:46,209 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 02:40:46,210 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 02:40:46,211 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2022-01-10 02:40:46,238 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-01-10 02:40:46,238 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 02:40:46,240 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 28 conjunts are in the unsatisfiable core [2022-01-10 02:40:46,242 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 02:40:46,524 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-01-10 02:40:46,524 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 02:40:48,809 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 65 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-01-10 02:40:48,810 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 02:40:48,810 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [91216820] [2022-01-10 02:40:48,810 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [91216820] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 02:40:48,810 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 02:40:48,810 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 21] total 36 [2022-01-10 02:40:48,810 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2039756725] [2022-01-10 02:40:48,810 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 02:40:48,811 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-01-10 02:40:48,811 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 02:40:48,811 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-01-10 02:40:48,812 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=1141, Unknown=0, NotChecked=0, Total=1260 [2022-01-10 02:40:48,812 INFO L87 Difference]: Start difference. First operand 28 states and 29 transitions. Second operand has 36 states, 35 states have (on average 1.3142857142857143) internal successors, (46), 24 states have internal predecessors, (46), 8 states have call successors, (8), 1 states have call predecessors, (8), 12 states have return successors, (12), 12 states have call predecessors, (12), 8 states have call successors, (12) [2022-01-10 02:40:49,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 02:40:49,368 INFO L93 Difference]: Finished difference Result 40 states and 42 transitions. [2022-01-10 02:40:49,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-01-10 02:40:49,368 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 35 states have (on average 1.3142857142857143) internal successors, (46), 24 states have internal predecessors, (46), 8 states have call successors, (8), 1 states have call predecessors, (8), 12 states have return successors, (12), 12 states have call predecessors, (12), 8 states have call successors, (12) Word has length 41 [2022-01-10 02:40:49,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 02:40:49,369 INFO L225 Difference]: With dead ends: 40 [2022-01-10 02:40:49,369 INFO L226 Difference]: Without dead ends: 34 [2022-01-10 02:40:49,370 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 331 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=290, Invalid=2260, Unknown=0, NotChecked=0, Total=2550 [2022-01-10 02:40:49,371 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 31 mSDsluCounter, 176 mSDsCounter, 0 mSdLazyCounter, 190 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 189 SdHoareTripleChecker+Invalid, 373 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 190 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 155 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-10 02:40:49,371 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 189 Invalid, 373 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 190 Invalid, 0 Unknown, 155 Unchecked, 0.2s Time] [2022-01-10 02:40:49,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2022-01-10 02:40:49,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2022-01-10 02:40:49,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 23 states have (on average 1.0434782608695652) internal successors, (24), 24 states have internal predecessors, (24), 2 states have call successors, (2), 1 states have call predecessors, (2), 8 states have return successors, (9), 8 states have call predecessors, (9), 2 states have call successors, (9) [2022-01-10 02:40:49,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 35 transitions. [2022-01-10 02:40:49,375 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 35 transitions. Word has length 41 [2022-01-10 02:40:49,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 02:40:49,375 INFO L470 AbstractCegarLoop]: Abstraction has 34 states and 35 transitions. [2022-01-10 02:40:49,375 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 35 states have (on average 1.3142857142857143) internal successors, (46), 24 states have internal predecessors, (46), 8 states have call successors, (8), 1 states have call predecessors, (8), 12 states have return successors, (12), 12 states have call predecessors, (12), 8 states have call successors, (12) [2022-01-10 02:40:49,376 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 35 transitions. [2022-01-10 02:40:49,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-01-10 02:40:49,376 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 02:40:49,376 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 02:40:49,383 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2022-01-10 02:40:49,583 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 02:40:49,583 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 02:40:49,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 02:40:49,584 INFO L85 PathProgramCache]: Analyzing trace with hash -1906255628, now seen corresponding path program 4 times [2022-01-10 02:40:49,584 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 02:40:49,584 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1255930051] [2022-01-10 02:40:49,584 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-10 02:40:49,584 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 02:40:49,584 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 02:40:49,585 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 02:40:49,586 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2022-01-10 02:40:49,619 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-10 02:40:49,620 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 02:40:49,622 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 36 conjunts are in the unsatisfiable core [2022-01-10 02:40:49,625 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 02:40:50,012 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2022-01-10 02:40:50,012 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 02:40:53,393 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-01-10 02:40:53,394 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 02:40:53,394 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1255930051] [2022-01-10 02:40:53,394 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1255930051] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 02:40:53,394 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 02:40:53,394 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 27] total 46 [2022-01-10 02:40:53,394 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1372079208] [2022-01-10 02:40:53,394 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 02:40:53,394 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-01-10 02:40:53,395 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 02:40:53,395 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-01-10 02:40:53,396 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=1913, Unknown=0, NotChecked=0, Total=2070 [2022-01-10 02:40:53,396 INFO L87 Difference]: Start difference. First operand 34 states and 35 transitions. Second operand has 46 states, 45 states have (on average 1.288888888888889) internal successors, (58), 30 states have internal predecessors, (58), 10 states have call successors, (10), 1 states have call predecessors, (10), 16 states have return successors, (16), 16 states have call predecessors, (16), 10 states have call successors, (16) [2022-01-10 02:40:54,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 02:40:54,180 INFO L93 Difference]: Finished difference Result 46 states and 48 transitions. [2022-01-10 02:40:54,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-01-10 02:40:54,182 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 45 states have (on average 1.288888888888889) internal successors, (58), 30 states have internal predecessors, (58), 10 states have call successors, (10), 1 states have call predecessors, (10), 16 states have return successors, (16), 16 states have call predecessors, (16), 10 states have call successors, (16) Word has length 53 [2022-01-10 02:40:54,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 02:40:54,183 INFO L225 Difference]: With dead ends: 46 [2022-01-10 02:40:54,183 INFO L226 Difference]: Without dead ends: 40 [2022-01-10 02:40:54,184 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 542 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=414, Invalid=3746, Unknown=0, NotChecked=0, Total=4160 [2022-01-10 02:40:54,185 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 28 mSDsluCounter, 287 mSDsCounter, 0 mSdLazyCounter, 335 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 302 SdHoareTripleChecker+Invalid, 659 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 335 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 289 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-10 02:40:54,185 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 302 Invalid, 659 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 335 Invalid, 0 Unknown, 289 Unchecked, 0.2s Time] [2022-01-10 02:40:54,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2022-01-10 02:40:54,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2022-01-10 02:40:54,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 27 states have (on average 1.037037037037037) internal successors, (28), 28 states have internal predecessors, (28), 2 states have call successors, (2), 1 states have call predecessors, (2), 10 states have return successors, (11), 10 states have call predecessors, (11), 2 states have call successors, (11) [2022-01-10 02:40:54,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 41 transitions. [2022-01-10 02:40:54,189 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 41 transitions. Word has length 53 [2022-01-10 02:40:54,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 02:40:54,189 INFO L470 AbstractCegarLoop]: Abstraction has 40 states and 41 transitions. [2022-01-10 02:40:54,189 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 45 states have (on average 1.288888888888889) internal successors, (58), 30 states have internal predecessors, (58), 10 states have call successors, (10), 1 states have call predecessors, (10), 16 states have return successors, (16), 16 states have call predecessors, (16), 10 states have call successors, (16) [2022-01-10 02:40:54,190 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 41 transitions. [2022-01-10 02:40:54,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-01-10 02:40:54,190 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 02:40:54,190 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 02:40:54,197 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Ended with exit code 0 [2022-01-10 02:40:54,396 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 02:40:54,396 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 02:40:54,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 02:40:54,397 INFO L85 PathProgramCache]: Analyzing trace with hash 788849844, now seen corresponding path program 5 times [2022-01-10 02:40:54,397 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 02:40:54,397 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [447543779] [2022-01-10 02:40:54,397 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-10 02:40:54,397 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 02:40:54,398 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 02:40:54,399 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 02:40:54,399 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2022-01-10 02:40:54,469 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2022-01-10 02:40:54,470 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 02:40:54,472 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 44 conjunts are in the unsatisfiable core [2022-01-10 02:40:54,474 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 02:40:54,919 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2022-01-10 02:40:54,920 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 02:40:59,754 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 207 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-01-10 02:40:59,754 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 02:40:59,754 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [447543779] [2022-01-10 02:40:59,755 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [447543779] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 02:40:59,755 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 02:40:59,755 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 33] total 56 [2022-01-10 02:40:59,755 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1405408574] [2022-01-10 02:40:59,755 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 02:40:59,757 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2022-01-10 02:40:59,758 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 02:40:59,759 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2022-01-10 02:40:59,759 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=195, Invalid=2885, Unknown=0, NotChecked=0, Total=3080 [2022-01-10 02:40:59,760 INFO L87 Difference]: Start difference. First operand 40 states and 41 transitions. Second operand has 56 states, 55 states have (on average 1.2727272727272727) internal successors, (70), 36 states have internal predecessors, (70), 12 states have call successors, (12), 1 states have call predecessors, (12), 20 states have return successors, (20), 20 states have call predecessors, (20), 12 states have call successors, (20) [2022-01-10 02:41:01,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 02:41:01,021 INFO L93 Difference]: Finished difference Result 52 states and 54 transitions. [2022-01-10 02:41:01,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-01-10 02:41:01,022 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 55 states have (on average 1.2727272727272727) internal successors, (70), 36 states have internal predecessors, (70), 12 states have call successors, (12), 1 states have call predecessors, (12), 20 states have return successors, (20), 20 states have call predecessors, (20), 12 states have call successors, (20) Word has length 65 [2022-01-10 02:41:01,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 02:41:01,023 INFO L225 Difference]: With dead ends: 52 [2022-01-10 02:41:01,023 INFO L226 Difference]: Without dead ends: 46 [2022-01-10 02:41:01,024 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 805 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=554, Invalid=5608, Unknown=0, NotChecked=0, Total=6162 [2022-01-10 02:41:01,025 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 74 mSDsluCounter, 350 mSDsCounter, 0 mSdLazyCounter, 367 mSolverCounterSat, 110 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 367 SdHoareTripleChecker+Invalid, 933 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 110 IncrementalHoareTripleChecker+Valid, 367 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 456 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-10 02:41:01,025 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [89 Valid, 367 Invalid, 933 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [110 Valid, 367 Invalid, 0 Unknown, 456 Unchecked, 0.3s Time] [2022-01-10 02:41:01,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2022-01-10 02:41:01,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2022-01-10 02:41:01,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 31 states have (on average 1.032258064516129) internal successors, (32), 32 states have internal predecessors, (32), 2 states have call successors, (2), 1 states have call predecessors, (2), 12 states have return successors, (13), 12 states have call predecessors, (13), 2 states have call successors, (13) [2022-01-10 02:41:01,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 47 transitions. [2022-01-10 02:41:01,029 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 47 transitions. Word has length 65 [2022-01-10 02:41:01,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 02:41:01,030 INFO L470 AbstractCegarLoop]: Abstraction has 46 states and 47 transitions. [2022-01-10 02:41:01,030 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 55 states have (on average 1.2727272727272727) internal successors, (70), 36 states have internal predecessors, (70), 12 states have call successors, (12), 1 states have call predecessors, (12), 20 states have return successors, (20), 20 states have call predecessors, (20), 12 states have call successors, (20) [2022-01-10 02:41:01,030 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 47 transitions. [2022-01-10 02:41:01,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2022-01-10 02:41:01,030 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 02:41:01,031 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 02:41:01,043 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2022-01-10 02:41:01,241 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 02:41:01,242 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 02:41:01,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 02:41:01,242 INFO L85 PathProgramCache]: Analyzing trace with hash 1302253684, now seen corresponding path program 6 times [2022-01-10 02:41:01,243 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 02:41:01,243 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1075432473] [2022-01-10 02:41:01,243 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-10 02:41:01,243 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 02:41:01,243 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 02:41:01,248 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 02:41:01,263 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2022-01-10 02:41:01,346 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2022-01-10 02:41:01,346 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 02:41:01,349 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 52 conjunts are in the unsatisfiable core [2022-01-10 02:41:01,352 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 02:41:01,932 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 0 proven. 187 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2022-01-10 02:41:01,932 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 02:41:08,345 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 0 proven. 308 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2022-01-10 02:41:08,346 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 02:41:08,346 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1075432473] [2022-01-10 02:41:08,346 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1075432473] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 02:41:08,346 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 02:41:08,346 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 39] total 66 [2022-01-10 02:41:08,346 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [997262181] [2022-01-10 02:41:08,346 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 02:41:08,347 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2022-01-10 02:41:08,347 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 02:41:08,347 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2022-01-10 02:41:08,348 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=4057, Unknown=0, NotChecked=0, Total=4290 [2022-01-10 02:41:08,348 INFO L87 Difference]: Start difference. First operand 46 states and 47 transitions. Second operand has 66 states, 65 states have (on average 1.2615384615384615) internal successors, (82), 42 states have internal predecessors, (82), 14 states have call successors, (14), 1 states have call predecessors, (14), 24 states have return successors, (24), 24 states have call predecessors, (24), 14 states have call successors, (24) [2022-01-10 02:41:09,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 02:41:09,756 INFO L93 Difference]: Finished difference Result 58 states and 60 transitions. [2022-01-10 02:41:09,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-01-10 02:41:09,772 INFO L78 Accepts]: Start accepts. Automaton has has 66 states, 65 states have (on average 1.2615384615384615) internal successors, (82), 42 states have internal predecessors, (82), 14 states have call successors, (14), 1 states have call predecessors, (14), 24 states have return successors, (24), 24 states have call predecessors, (24), 14 states have call successors, (24) Word has length 77 [2022-01-10 02:41:09,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 02:41:09,776 INFO L225 Difference]: With dead ends: 58 [2022-01-10 02:41:09,776 INFO L226 Difference]: Without dead ends: 52 [2022-01-10 02:41:09,782 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1120 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=710, Invalid=7846, Unknown=0, NotChecked=0, Total=8556 [2022-01-10 02:41:09,783 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 19 mSDsluCounter, 633 mSDsCounter, 0 mSdLazyCounter, 624 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 652 SdHoareTripleChecker+Invalid, 1300 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 624 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 650 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-10 02:41:09,783 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 652 Invalid, 1300 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 624 Invalid, 0 Unknown, 650 Unchecked, 0.3s Time] [2022-01-10 02:41:09,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2022-01-10 02:41:09,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2022-01-10 02:41:09,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 35 states have (on average 1.0285714285714285) internal successors, (36), 36 states have internal predecessors, (36), 2 states have call successors, (2), 1 states have call predecessors, (2), 14 states have return successors, (15), 14 states have call predecessors, (15), 2 states have call successors, (15) [2022-01-10 02:41:09,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 53 transitions. [2022-01-10 02:41:09,797 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 53 transitions. Word has length 77 [2022-01-10 02:41:09,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 02:41:09,797 INFO L470 AbstractCegarLoop]: Abstraction has 52 states and 53 transitions. [2022-01-10 02:41:09,797 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 65 states have (on average 1.2615384615384615) internal successors, (82), 42 states have internal predecessors, (82), 14 states have call successors, (14), 1 states have call predecessors, (14), 24 states have return successors, (24), 24 states have call predecessors, (24), 14 states have call successors, (24) [2022-01-10 02:41:09,797 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 53 transitions. [2022-01-10 02:41:09,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2022-01-10 02:41:09,798 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 02:41:09,798 INFO L514 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 02:41:09,823 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2022-01-10 02:41:10,010 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 02:41:10,011 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 02:41:10,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 02:41:10,011 INFO L85 PathProgramCache]: Analyzing trace with hash -1287742412, now seen corresponding path program 7 times [2022-01-10 02:41:10,012 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 02:41:10,012 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [598463552] [2022-01-10 02:41:10,012 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-10 02:41:10,012 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 02:41:10,012 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 02:41:10,013 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 02:41:10,018 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2022-01-10 02:41:10,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 02:41:10,085 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 60 conjunts are in the unsatisfiable core [2022-01-10 02:41:10,100 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 02:41:10,737 INFO L134 CoverageAnalysis]: Checked inductivity of 520 backedges. 0 proven. 260 refuted. 0 times theorem prover too weak. 260 trivial. 0 not checked. [2022-01-10 02:41:10,737 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 02:41:19,276 INFO L134 CoverageAnalysis]: Checked inductivity of 520 backedges. 0 proven. 429 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2022-01-10 02:41:19,276 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 02:41:19,276 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [598463552] [2022-01-10 02:41:19,276 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [598463552] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 02:41:19,277 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 02:41:19,277 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 45] total 76 [2022-01-10 02:41:19,277 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [653236768] [2022-01-10 02:41:19,277 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 02:41:19,277 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 76 states [2022-01-10 02:41:19,277 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 02:41:19,278 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2022-01-10 02:41:19,279 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=271, Invalid=5429, Unknown=0, NotChecked=0, Total=5700 [2022-01-10 02:41:19,279 INFO L87 Difference]: Start difference. First operand 52 states and 53 transitions. Second operand has 76 states, 75 states have (on average 1.2533333333333334) internal successors, (94), 48 states have internal predecessors, (94), 16 states have call successors, (16), 1 states have call predecessors, (16), 28 states have return successors, (28), 28 states have call predecessors, (28), 16 states have call successors, (28) [2022-01-10 02:41:21,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 02:41:21,109 INFO L93 Difference]: Finished difference Result 64 states and 66 transitions. [2022-01-10 02:41:21,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-01-10 02:41:21,109 INFO L78 Accepts]: Start accepts. Automaton has has 76 states, 75 states have (on average 1.2533333333333334) internal successors, (94), 48 states have internal predecessors, (94), 16 states have call successors, (16), 1 states have call predecessors, (16), 28 states have return successors, (28), 28 states have call predecessors, (28), 16 states have call successors, (28) Word has length 89 [2022-01-10 02:41:21,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 02:41:21,110 INFO L225 Difference]: With dead ends: 64 [2022-01-10 02:41:21,110 INFO L226 Difference]: Without dead ends: 58 [2022-01-10 02:41:21,113 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 221 GetRequests, 116 SyntacticMatches, 0 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1487 ImplicationChecksByTransitivity, 6.2s TimeCoverageRelationStatistics Valid=882, Invalid=10460, Unknown=0, NotChecked=0, Total=11342 [2022-01-10 02:41:21,114 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 127 mSDsluCounter, 756 mSDsCounter, 0 mSdLazyCounter, 707 mSolverCounterSat, 175 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 146 SdHoareTripleChecker+Valid, 777 SdHoareTripleChecker+Invalid, 1674 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 175 IncrementalHoareTripleChecker+Valid, 707 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 792 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-10 02:41:21,114 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [146 Valid, 777 Invalid, 1674 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [175 Valid, 707 Invalid, 0 Unknown, 792 Unchecked, 0.4s Time] [2022-01-10 02:41:21,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2022-01-10 02:41:21,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2022-01-10 02:41:21,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 39 states have (on average 1.0256410256410255) internal successors, (40), 40 states have internal predecessors, (40), 2 states have call successors, (2), 1 states have call predecessors, (2), 16 states have return successors, (17), 16 states have call predecessors, (17), 2 states have call successors, (17) [2022-01-10 02:41:21,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 59 transitions. [2022-01-10 02:41:21,119 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 59 transitions. Word has length 89 [2022-01-10 02:41:21,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 02:41:21,120 INFO L470 AbstractCegarLoop]: Abstraction has 58 states and 59 transitions. [2022-01-10 02:41:21,120 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 76 states, 75 states have (on average 1.2533333333333334) internal successors, (94), 48 states have internal predecessors, (94), 16 states have call successors, (16), 1 states have call predecessors, (16), 28 states have return successors, (28), 28 states have call predecessors, (28), 16 states have call successors, (28) [2022-01-10 02:41:21,120 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 59 transitions. [2022-01-10 02:41:21,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2022-01-10 02:41:21,121 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 02:41:21,121 INFO L514 BasicCegarLoop]: trace histogram [16, 16, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 02:41:21,131 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (9)] Ended with exit code 0 [2022-01-10 02:41:21,327 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 02:41:21,328 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 02:41:21,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 02:41:21,328 INFO L85 PathProgramCache]: Analyzing trace with hash 1760839668, now seen corresponding path program 8 times [2022-01-10 02:41:21,328 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 02:41:21,328 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [811326770] [2022-01-10 02:41:21,328 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-10 02:41:21,329 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 02:41:21,329 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 02:41:21,329 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 02:41:21,331 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2022-01-10 02:41:21,407 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-10 02:41:21,407 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 02:41:21,411 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 68 conjunts are in the unsatisfiable core [2022-01-10 02:41:21,413 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 02:41:22,245 INFO L134 CoverageAnalysis]: Checked inductivity of 690 backedges. 0 proven. 345 refuted. 0 times theorem prover too weak. 345 trivial. 0 not checked. [2022-01-10 02:41:22,245 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 02:41:33,174 INFO L134 CoverageAnalysis]: Checked inductivity of 690 backedges. 0 proven. 570 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2022-01-10 02:41:33,175 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 02:41:33,175 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [811326770] [2022-01-10 02:41:33,175 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [811326770] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 02:41:33,175 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 02:41:33,175 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 51] total 86 [2022-01-10 02:41:33,175 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [849100690] [2022-01-10 02:41:33,175 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 02:41:33,177 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 86 states [2022-01-10 02:41:33,177 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 02:41:33,177 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2022-01-10 02:41:33,178 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=309, Invalid=7001, Unknown=0, NotChecked=0, Total=7310 [2022-01-10 02:41:33,179 INFO L87 Difference]: Start difference. First operand 58 states and 59 transitions. Second operand has 86 states, 85 states have (on average 1.2470588235294118) internal successors, (106), 54 states have internal predecessors, (106), 18 states have call successors, (18), 1 states have call predecessors, (18), 32 states have return successors, (32), 32 states have call predecessors, (32), 18 states have call successors, (32) [2022-01-10 02:41:35,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 02:41:35,377 INFO L93 Difference]: Finished difference Result 70 states and 72 transitions. [2022-01-10 02:41:35,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-01-10 02:41:35,378 INFO L78 Accepts]: Start accepts. Automaton has has 86 states, 85 states have (on average 1.2470588235294118) internal successors, (106), 54 states have internal predecessors, (106), 18 states have call successors, (18), 1 states have call predecessors, (18), 32 states have return successors, (32), 32 states have call predecessors, (32), 18 states have call successors, (32) Word has length 101 [2022-01-10 02:41:35,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 02:41:35,379 INFO L225 Difference]: With dead ends: 70 [2022-01-10 02:41:35,379 INFO L226 Difference]: Without dead ends: 64 [2022-01-10 02:41:35,381 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 235 GetRequests, 116 SyntacticMatches, 0 SemanticMatches, 119 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1906 ImplicationChecksByTransitivity, 7.8s TimeCoverageRelationStatistics Valid=1070, Invalid=13450, Unknown=0, NotChecked=0, Total=14520 [2022-01-10 02:41:35,381 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 123 mSDsluCounter, 866 mSDsCounter, 0 mSdLazyCounter, 796 mSolverCounterSat, 204 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 144 SdHoareTripleChecker+Valid, 889 SdHoareTripleChecker+Invalid, 2169 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 204 IncrementalHoareTripleChecker+Valid, 796 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1169 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-10 02:41:35,382 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [144 Valid, 889 Invalid, 2169 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [204 Valid, 796 Invalid, 0 Unknown, 1169 Unchecked, 0.4s Time] [2022-01-10 02:41:35,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2022-01-10 02:41:35,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2022-01-10 02:41:35,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 43 states have (on average 1.0232558139534884) internal successors, (44), 44 states have internal predecessors, (44), 2 states have call successors, (2), 1 states have call predecessors, (2), 18 states have return successors, (19), 18 states have call predecessors, (19), 2 states have call successors, (19) [2022-01-10 02:41:35,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 65 transitions. [2022-01-10 02:41:35,386 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 65 transitions. Word has length 101 [2022-01-10 02:41:35,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 02:41:35,386 INFO L470 AbstractCegarLoop]: Abstraction has 64 states and 65 transitions. [2022-01-10 02:41:35,386 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 86 states, 85 states have (on average 1.2470588235294118) internal successors, (106), 54 states have internal predecessors, (106), 18 states have call successors, (18), 1 states have call predecessors, (18), 32 states have return successors, (32), 32 states have call predecessors, (32), 18 states have call successors, (32) [2022-01-10 02:41:35,386 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 65 transitions. [2022-01-10 02:41:35,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2022-01-10 02:41:35,387 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 02:41:35,388 INFO L514 BasicCegarLoop]: trace histogram [18, 18, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 02:41:35,394 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2022-01-10 02:41:35,594 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 02:41:35,594 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 02:41:35,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 02:41:35,595 INFO L85 PathProgramCache]: Analyzing trace with hash -1211116620, now seen corresponding path program 9 times [2022-01-10 02:41:35,595 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 02:41:35,595 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [203975887] [2022-01-10 02:41:35,595 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-10 02:41:35,595 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 02:41:35,595 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 02:41:35,596 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 02:41:35,598 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2022-01-10 02:41:35,723 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 18 check-sat command(s) [2022-01-10 02:41:35,723 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 02:41:35,727 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 76 conjunts are in the unsatisfiable core [2022-01-10 02:41:35,730 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 02:41:36,754 INFO L134 CoverageAnalysis]: Checked inductivity of 884 backedges. 0 proven. 442 refuted. 0 times theorem prover too weak. 442 trivial. 0 not checked. [2022-01-10 02:41:36,754 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 02:41:49,857 INFO L134 CoverageAnalysis]: Checked inductivity of 884 backedges. 0 proven. 731 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2022-01-10 02:41:49,857 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 02:41:49,857 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [203975887] [2022-01-10 02:41:49,857 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [203975887] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 02:41:49,857 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 02:41:49,858 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 57] total 96 [2022-01-10 02:41:49,858 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1817392013] [2022-01-10 02:41:49,858 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 02:41:49,858 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 96 states [2022-01-10 02:41:49,858 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 02:41:49,859 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2022-01-10 02:41:49,859 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=347, Invalid=8773, Unknown=0, NotChecked=0, Total=9120 [2022-01-10 02:41:49,859 INFO L87 Difference]: Start difference. First operand 64 states and 65 transitions. Second operand has 96 states, 95 states have (on average 1.2421052631578948) internal successors, (118), 60 states have internal predecessors, (118), 20 states have call successors, (20), 1 states have call predecessors, (20), 36 states have return successors, (36), 36 states have call predecessors, (36), 20 states have call successors, (36) [2022-01-10 02:41:52,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 02:41:52,319 INFO L93 Difference]: Finished difference Result 71 states and 72 transitions. [2022-01-10 02:41:52,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-01-10 02:41:52,320 INFO L78 Accepts]: Start accepts. Automaton has has 96 states, 95 states have (on average 1.2421052631578948) internal successors, (118), 60 states have internal predecessors, (118), 20 states have call successors, (20), 1 states have call predecessors, (20), 36 states have return successors, (36), 36 states have call predecessors, (36), 20 states have call successors, (36) Word has length 113 [2022-01-10 02:41:52,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 02:41:52,321 INFO L225 Difference]: With dead ends: 71 [2022-01-10 02:41:52,321 INFO L226 Difference]: Without dead ends: 67 [2022-01-10 02:41:52,322 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 277 GetRequests, 148 SyntacticMatches, 0 SemanticMatches, 129 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2227 ImplicationChecksByTransitivity, 9.5s TimeCoverageRelationStatistics Valid=1185, Invalid=15845, Unknown=0, NotChecked=0, Total=17030 [2022-01-10 02:41:52,323 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 377 mSDsluCounter, 1161 mSDsCounter, 0 mSdLazyCounter, 1009 mSolverCounterSat, 564 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 398 SdHoareTripleChecker+Valid, 1186 SdHoareTripleChecker+Invalid, 2887 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 564 IncrementalHoareTripleChecker+Valid, 1009 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1314 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-10 02:41:52,323 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [398 Valid, 1186 Invalid, 2887 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [564 Valid, 1009 Invalid, 0 Unknown, 1314 Unchecked, 0.6s Time] [2022-01-10 02:41:52,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2022-01-10 02:41:52,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2022-01-10 02:41:52,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 45 states have (on average 1.0222222222222221) internal successors, (46), 46 states have internal predecessors, (46), 2 states have call successors, (2), 1 states have call predecessors, (2), 19 states have return successors, (20), 19 states have call predecessors, (20), 2 states have call successors, (20) [2022-01-10 02:41:52,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 68 transitions. [2022-01-10 02:41:52,327 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 68 transitions. Word has length 113 [2022-01-10 02:41:52,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 02:41:52,327 INFO L470 AbstractCegarLoop]: Abstraction has 67 states and 68 transitions. [2022-01-10 02:41:52,327 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 96 states, 95 states have (on average 1.2421052631578948) internal successors, (118), 60 states have internal predecessors, (118), 20 states have call successors, (20), 1 states have call predecessors, (20), 36 states have return successors, (36), 36 states have call predecessors, (36), 20 states have call successors, (36) [2022-01-10 02:41:52,327 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 68 transitions. [2022-01-10 02:41:52,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2022-01-10 02:41:52,328 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 02:41:52,328 INFO L514 BasicCegarLoop]: trace histogram [19, 19, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 02:41:52,341 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (11)] Ended with exit code 0 [2022-01-10 02:41:52,528 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 02:41:52,529 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 02:41:52,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 02:41:52,529 INFO L85 PathProgramCache]: Analyzing trace with hash 79612228, now seen corresponding path program 10 times [2022-01-10 02:41:52,529 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 02:41:52,529 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [865275036] [2022-01-10 02:41:52,530 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-10 02:41:52,530 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 02:41:52,530 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 02:41:52,531 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 02:41:52,532 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2022-01-10 02:41:52,696 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-10 02:41:52,696 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 02:41:52,700 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 80 conjunts are in the unsatisfiable core [2022-01-10 02:41:52,703 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 02:41:53,868 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 495 refuted. 0 times theorem prover too weak. 495 trivial. 0 not checked. [2022-01-10 02:41:53,868 INFO L328 TraceCheckSpWp]: Computing backward predicates...