/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/recursive/recHanoi01.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-a10ec3b [2022-01-10 06:36:43,400 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-10 06:36:43,402 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-10 06:36:43,450 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-01-10 06:36:43,489 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-10 06:36:43,489 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-10 06:36:43,490 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-10 06:36:43,496 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 06:36:43,531 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-10 06:36:43,531 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-10 06:36:43,532 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-01-10 06:36:43,532 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-01-10 06:36:43,533 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-01-10 06:36:43,533 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-01-10 06:36:43,534 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-01-10 06:36:43,534 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-01-10 06:36:43,534 INFO L138 SettingsManager]: * Use SBE=true [2022-01-10 06:36:43,534 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-10 06:36:43,535 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-10 06:36:43,535 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-10 06:36:43,535 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-10 06:36:43,535 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-10 06:36:43,535 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-10 06:36:43,535 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-01-10 06:36:43,535 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-01-10 06:36:43,535 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-01-10 06:36:43,535 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-10 06:36:43,535 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-10 06:36:43,536 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-10 06:36:43,536 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-10 06:36:43,536 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-10 06:36:43,536 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-10 06:36:43,537 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-10 06:36:43,537 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-01-10 06:36:43,537 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-01-10 06:36:43,537 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2022-01-10 06:36:43,537 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-01-10 06:36:43,537 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-01-10 06:36:43,537 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-01-10 06:36:43,537 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-01-10 06:36:43,538 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-01-10 06:36:43,538 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-10 06:36:43,756 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-10 06:36:43,777 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-10 06:36:43,778 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-10 06:36:43,779 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-10 06:36:43,779 INFO L275 PluginConnector]: CDTParser initialized [2022-01-10 06:36:43,780 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive/recHanoi01.c [2022-01-10 06:36:43,826 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ffc04465b/be48a040e88841108b5e12476c7dc5e0/FLAGa95e2ad69 [2022-01-10 06:36:44,249 INFO L306 CDTParser]: Found 1 translation units. [2022-01-10 06:36:44,249 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive/recHanoi01.c [2022-01-10 06:36:44,259 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ffc04465b/be48a040e88841108b5e12476c7dc5e0/FLAGa95e2ad69 [2022-01-10 06:36:44,642 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ffc04465b/be48a040e88841108b5e12476c7dc5e0 [2022-01-10 06:36:44,644 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-10 06:36:44,645 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-01-10 06:36:44,660 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-10 06:36:44,660 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-10 06:36:44,663 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-10 06:36:44,663 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 06:36:44" (1/1) ... [2022-01-10 06:36:44,665 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@543727c1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:36:44, skipping insertion in model container [2022-01-10 06:36:44,665 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 06:36:44" (1/1) ... [2022-01-10 06:36:44,669 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-10 06:36:44,686 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-10 06:36:44,827 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/recursive/recHanoi01.c[1213,1226] [2022-01-10 06:36:44,830 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-10 06:36:44,839 INFO L203 MainTranslator]: Completed pre-run [2022-01-10 06:36:44,861 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/recursive/recHanoi01.c[1213,1226] [2022-01-10 06:36:44,863 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-10 06:36:44,873 INFO L208 MainTranslator]: Completed translation [2022-01-10 06:36:44,874 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:36:44 WrapperNode [2022-01-10 06:36:44,874 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-10 06:36:44,876 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-01-10 06:36:44,876 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-01-10 06:36:44,876 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-01-10 06:36:44,880 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:36:44" (1/1) ... [2022-01-10 06:36:44,885 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:36:44" (1/1) ... [2022-01-10 06:36:44,895 INFO L137 Inliner]: procedures = 14, calls = 12, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 27 [2022-01-10 06:36:44,896 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-01-10 06:36:44,896 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-10 06:36:44,896 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-10 06:36:44,896 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-10 06:36:44,901 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:36:44" (1/1) ... [2022-01-10 06:36:44,901 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:36:44" (1/1) ... [2022-01-10 06:36:44,911 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:36:44" (1/1) ... [2022-01-10 06:36:44,911 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:36:44" (1/1) ... [2022-01-10 06:36:44,919 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:36:44" (1/1) ... [2022-01-10 06:36:44,921 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:36:44" (1/1) ... [2022-01-10 06:36:44,921 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:36:44" (1/1) ... [2022-01-10 06:36:44,922 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-10 06:36:44,923 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-10 06:36:44,923 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-10 06:36:44,923 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-10 06:36:44,928 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:36:44" (1/1) ... [2022-01-10 06:36:44,933 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-10 06:36:44,940 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 06:36:44,950 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 06:36:44,977 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 06:36:44,987 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-10 06:36:44,987 INFO L130 BoogieDeclarations]: Found specification of procedure applyHanoi [2022-01-10 06:36:44,987 INFO L138 BoogieDeclarations]: Found implementation of procedure applyHanoi [2022-01-10 06:36:44,987 INFO L130 BoogieDeclarations]: Found specification of procedure hanoi [2022-01-10 06:36:44,987 INFO L138 BoogieDeclarations]: Found implementation of procedure hanoi [2022-01-10 06:36:44,987 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-01-10 06:36:44,987 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-10 06:36:44,987 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-10 06:36:45,032 INFO L234 CfgBuilder]: Building ICFG [2022-01-10 06:36:45,033 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-10 06:36:45,145 INFO L275 CfgBuilder]: Performing block encoding [2022-01-10 06:36:45,149 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-10 06:36:45,149 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2022-01-10 06:36:45,150 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 06:36:45 BoogieIcfgContainer [2022-01-10 06:36:45,150 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-10 06:36:45,151 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-10 06:36:45,151 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-10 06:36:45,153 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-10 06:36:45,153 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 10.01 06:36:44" (1/3) ... [2022-01-10 06:36:45,154 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@798750b3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 06:36:45, skipping insertion in model container [2022-01-10 06:36:45,154 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:36:44" (2/3) ... [2022-01-10 06:36:45,154 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@798750b3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 06:36:45, skipping insertion in model container [2022-01-10 06:36:45,154 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 06:36:45" (3/3) ... [2022-01-10 06:36:45,155 INFO L111 eAbstractionObserver]: Analyzing ICFG recHanoi01.c [2022-01-10 06:36:45,158 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-01-10 06:36:45,158 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-10 06:36:45,185 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-10 06:36:45,190 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 06:36:45,190 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-01-10 06:36:45,199 INFO L276 IsEmpty]: Start isEmpty. Operand has 24 states, 15 states have (on average 1.3333333333333333) internal successors, (20), 17 states have internal predecessors, (20), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-01-10 06:36:45,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-01-10 06:36:45,203 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:36:45,203 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:36:45,204 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:36:45,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:36:45,207 INFO L85 PathProgramCache]: Analyzing trace with hash -424312916, now seen corresponding path program 1 times [2022-01-10 06:36:45,214 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:36:45,214 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [162495247] [2022-01-10 06:36:45,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:36:45,215 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:36:45,215 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:36:45,217 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 06:36:45,218 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 06:36:45,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:36:45,261 INFO L263 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 5 conjunts are in the unsatisfiable core [2022-01-10 06:36:45,265 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:36:45,347 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 06:36:45,347 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:36:45,348 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:36:45,348 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [162495247] [2022-01-10 06:36:45,349 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [162495247] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:36:45,349 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:36:45,349 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-10 06:36:45,350 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1457990776] [2022-01-10 06:36:45,350 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:36:45,354 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 06:36:45,355 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:36:45,375 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 06:36:45,376 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-10 06:36:45,377 INFO L87 Difference]: Start difference. First operand has 24 states, 15 states have (on average 1.3333333333333333) internal successors, (20), 17 states have internal predecessors, (20), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Second operand has 5 states, 4 states have (on average 3.0) internal successors, (12), 5 states have internal predecessors, (12), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-10 06:36:45,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:36:45,457 INFO L93 Difference]: Finished difference Result 43 states and 52 transitions. [2022-01-10 06:36:45,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-10 06:36:45,460 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.0) internal successors, (12), 5 states have internal predecessors, (12), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 16 [2022-01-10 06:36:45,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:36:45,465 INFO L225 Difference]: With dead ends: 43 [2022-01-10 06:36:45,465 INFO L226 Difference]: Without dead ends: 23 [2022-01-10 06:36:45,467 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-01-10 06:36:45,469 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 10 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 83 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 06:36:45,470 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 83 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 06:36:45,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2022-01-10 06:36:45,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2022-01-10 06:36:45,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 14 states have (on average 1.1428571428571428) internal successors, (16), 15 states have internal predecessors, (16), 5 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2022-01-10 06:36:45,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 28 transitions. [2022-01-10 06:36:45,511 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 28 transitions. Word has length 16 [2022-01-10 06:36:45,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:36:45,511 INFO L470 AbstractCegarLoop]: Abstraction has 23 states and 28 transitions. [2022-01-10 06:36:45,512 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.0) internal successors, (12), 5 states have internal predecessors, (12), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-10 06:36:45,512 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 28 transitions. [2022-01-10 06:36:45,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-10 06:36:45,514 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:36:45,514 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:36:45,521 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2022-01-10 06:36:45,722 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 06:36:45,723 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:36:45,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:36:45,724 INFO L85 PathProgramCache]: Analyzing trace with hash -2103389423, now seen corresponding path program 1 times [2022-01-10 06:36:45,724 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:36:45,724 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1868282481] [2022-01-10 06:36:45,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:36:45,724 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:36:45,724 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:36:45,725 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 06:36:45,736 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 06:36:45,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:36:45,762 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 12 conjunts are in the unsatisfiable core [2022-01-10 06:36:45,764 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:36:45,890 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-01-10 06:36:45,890 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 06:36:46,142 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-10 06:36:46,142 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:36:46,142 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1868282481] [2022-01-10 06:36:46,142 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1868282481] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 06:36:46,142 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 06:36:46,142 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 15 [2022-01-10 06:36:46,143 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2038820005] [2022-01-10 06:36:46,143 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 06:36:46,144 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-01-10 06:36:46,144 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:36:46,144 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-01-10 06:36:46,144 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2022-01-10 06:36:46,145 INFO L87 Difference]: Start difference. First operand 23 states and 28 transitions. Second operand has 15 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 4 states have call successors, (8), 5 states have call predecessors, (8), 6 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) [2022-01-10 06:36:46,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:36:46,539 INFO L93 Difference]: Finished difference Result 74 states and 104 transitions. [2022-01-10 06:36:46,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-01-10 06:36:46,540 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 4 states have call successors, (8), 5 states have call predecessors, (8), 6 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) Word has length 26 [2022-01-10 06:36:46,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:36:46,541 INFO L225 Difference]: With dead ends: 74 [2022-01-10 06:36:46,541 INFO L226 Difference]: Without dead ends: 68 [2022-01-10 06:36:46,542 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=105, Invalid=401, Unknown=0, NotChecked=0, Total=506 [2022-01-10 06:36:46,543 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 69 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 324 mSolverCounterSat, 78 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 99 SdHoareTripleChecker+Invalid, 402 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 78 IncrementalHoareTripleChecker+Valid, 324 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-10 06:36:46,543 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [73 Valid, 99 Invalid, 402 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [78 Valid, 324 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-10 06:36:46,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2022-01-10 06:36:46,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 57. [2022-01-10 06:36:46,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 31 states have (on average 1.1612903225806452) internal successors, (36), 34 states have internal predecessors, (36), 14 states have call successors, (14), 6 states have call predecessors, (14), 11 states have return successors, (33), 16 states have call predecessors, (33), 14 states have call successors, (33) [2022-01-10 06:36:46,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 83 transitions. [2022-01-10 06:36:46,557 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 83 transitions. Word has length 26 [2022-01-10 06:36:46,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:36:46,557 INFO L470 AbstractCegarLoop]: Abstraction has 57 states and 83 transitions. [2022-01-10 06:36:46,557 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 4 states have call successors, (8), 5 states have call predecessors, (8), 6 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) [2022-01-10 06:36:46,557 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 83 transitions. [2022-01-10 06:36:46,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-01-10 06:36:46,559 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:36:46,559 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:36:46,567 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 06:36:46,765 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 06:36:46,765 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:36:46,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:36:46,766 INFO L85 PathProgramCache]: Analyzing trace with hash 365687158, now seen corresponding path program 2 times [2022-01-10 06:36:46,766 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:36:46,767 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [74614297] [2022-01-10 06:36:46,767 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-10 06:36:46,767 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:36:46,767 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:36:46,777 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 06:36:46,779 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 06:36:46,817 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-10 06:36:46,818 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 06:36:46,820 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 10 conjunts are in the unsatisfiable core [2022-01-10 06:36:46,821 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:36:46,941 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 13 proven. 9 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-01-10 06:36:46,942 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 06:36:47,178 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 13 proven. 10 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-01-10 06:36:47,178 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:36:47,178 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [74614297] [2022-01-10 06:36:47,179 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [74614297] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 06:36:47,179 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 06:36:47,179 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2022-01-10 06:36:47,179 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [837627879] [2022-01-10 06:36:47,179 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 06:36:47,179 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-01-10 06:36:47,179 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:36:47,180 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-01-10 06:36:47,180 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2022-01-10 06:36:47,180 INFO L87 Difference]: Start difference. First operand 57 states and 83 transitions. Second operand has 13 states, 10 states have (on average 2.4) internal successors, (24), 11 states have internal predecessors, (24), 7 states have call successors, (10), 1 states have call predecessors, (10), 4 states have return successors, (10), 7 states have call predecessors, (10), 7 states have call successors, (10) [2022-01-10 06:36:47,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:36:47,350 INFO L93 Difference]: Finished difference Result 95 states and 146 transitions. [2022-01-10 06:36:47,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-10 06:36:47,351 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 10 states have (on average 2.4) internal successors, (24), 11 states have internal predecessors, (24), 7 states have call successors, (10), 1 states have call predecessors, (10), 4 states have return successors, (10), 7 states have call predecessors, (10), 7 states have call successors, (10) Word has length 36 [2022-01-10 06:36:47,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:36:47,352 INFO L225 Difference]: With dead ends: 95 [2022-01-10 06:36:47,352 INFO L226 Difference]: Without dead ends: 67 [2022-01-10 06:36:47,353 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 60 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2022-01-10 06:36:47,353 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 22 mSDsluCounter, 122 mSDsCounter, 0 mSdLazyCounter, 176 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 144 SdHoareTripleChecker+Invalid, 188 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 176 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 06:36:47,354 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 144 Invalid, 188 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 176 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-10 06:36:47,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2022-01-10 06:36:47,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 49. [2022-01-10 06:36:47,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 28 states have (on average 1.1428571428571428) internal successors, (32), 30 states have internal predecessors, (32), 11 states have call successors, (11), 6 states have call predecessors, (11), 9 states have return successors, (25), 12 states have call predecessors, (25), 11 states have call successors, (25) [2022-01-10 06:36:47,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 68 transitions. [2022-01-10 06:36:47,363 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 68 transitions. Word has length 36 [2022-01-10 06:36:47,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:36:47,363 INFO L470 AbstractCegarLoop]: Abstraction has 49 states and 68 transitions. [2022-01-10 06:36:47,363 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 10 states have (on average 2.4) internal successors, (24), 11 states have internal predecessors, (24), 7 states have call successors, (10), 1 states have call predecessors, (10), 4 states have return successors, (10), 7 states have call predecessors, (10), 7 states have call successors, (10) [2022-01-10 06:36:47,363 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 68 transitions. [2022-01-10 06:36:47,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-01-10 06:36:47,364 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:36:47,364 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:36:47,373 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 06:36:47,571 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 06:36:47,571 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:36:47,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:36:47,572 INFO L85 PathProgramCache]: Analyzing trace with hash -787037173, now seen corresponding path program 1 times [2022-01-10 06:36:47,572 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:36:47,572 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1870043117] [2022-01-10 06:36:47,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:36:47,573 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:36:47,573 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:36:47,574 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 06:36:47,575 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 06:36:47,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:36:47,606 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 10 conjunts are in the unsatisfiable core [2022-01-10 06:36:47,607 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:36:47,697 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-01-10 06:36:47,698 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 06:36:47,857 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-10 06:36:47,857 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:36:47,857 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1870043117] [2022-01-10 06:36:47,857 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1870043117] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 06:36:47,857 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 06:36:47,857 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2022-01-10 06:36:47,858 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2041175081] [2022-01-10 06:36:47,858 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 06:36:47,859 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-01-10 06:36:47,859 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:36:47,859 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-01-10 06:36:47,859 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2022-01-10 06:36:47,859 INFO L87 Difference]: Start difference. First operand 49 states and 68 transitions. Second operand has 12 states, 10 states have (on average 2.8) internal successors, (28), 11 states have internal predecessors, (28), 7 states have call successors, (7), 1 states have call predecessors, (7), 4 states have return successors, (7), 4 states have call predecessors, (7), 7 states have call successors, (7) [2022-01-10 06:36:47,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:36:47,963 INFO L93 Difference]: Finished difference Result 95 states and 138 transitions. [2022-01-10 06:36:47,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-10 06:36:47,964 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 10 states have (on average 2.8) internal successors, (28), 11 states have internal predecessors, (28), 7 states have call successors, (7), 1 states have call predecessors, (7), 4 states have return successors, (7), 4 states have call predecessors, (7), 7 states have call successors, (7) Word has length 32 [2022-01-10 06:36:47,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:36:47,965 INFO L225 Difference]: With dead ends: 95 [2022-01-10 06:36:47,965 INFO L226 Difference]: Without dead ends: 50 [2022-01-10 06:36:47,966 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2022-01-10 06:36:47,966 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 21 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 113 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 125 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 113 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 06:36:47,967 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 86 Invalid, 125 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 113 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-10 06:36:47,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2022-01-10 06:36:47,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 48. [2022-01-10 06:36:47,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 30 states have (on average 1.1) internal successors, (33), 29 states have internal predecessors, (33), 10 states have call successors, (10), 8 states have call predecessors, (10), 7 states have return successors, (17), 10 states have call predecessors, (17), 10 states have call successors, (17) [2022-01-10 06:36:47,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 60 transitions. [2022-01-10 06:36:47,973 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 60 transitions. Word has length 32 [2022-01-10 06:36:47,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:36:47,973 INFO L470 AbstractCegarLoop]: Abstraction has 48 states and 60 transitions. [2022-01-10 06:36:47,973 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 10 states have (on average 2.8) internal successors, (28), 11 states have internal predecessors, (28), 7 states have call successors, (7), 1 states have call predecessors, (7), 4 states have return successors, (7), 4 states have call predecessors, (7), 7 states have call successors, (7) [2022-01-10 06:36:47,973 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 60 transitions. [2022-01-10 06:36:47,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-01-10 06:36:47,974 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:36:47,974 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 4, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:36:47,980 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 06:36:48,180 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 06:36:48,181 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:36:48,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:36:48,181 INFO L85 PathProgramCache]: Analyzing trace with hash 464974891, now seen corresponding path program 2 times [2022-01-10 06:36:48,181 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:36:48,182 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1534638] [2022-01-10 06:36:48,183 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-10 06:36:48,183 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:36:48,184 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:36:48,184 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 06:36:48,186 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 06:36:48,228 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-10 06:36:48,228 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 06:36:48,231 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 24 conjunts are in the unsatisfiable core [2022-01-10 06:36:48,233 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:36:48,441 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2022-01-10 06:36:48,442 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 06:36:49,118 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 0 proven. 80 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-01-10 06:36:49,118 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:36:49,118 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1534638] [2022-01-10 06:36:49,118 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1534638] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 06:36:49,119 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 06:36:49,119 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 18] total 27 [2022-01-10 06:36:49,119 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [71096820] [2022-01-10 06:36:49,119 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 06:36:49,119 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-01-10 06:36:49,119 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:36:49,120 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-01-10 06:36:49,120 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=610, Unknown=0, NotChecked=0, Total=702 [2022-01-10 06:36:49,120 INFO L87 Difference]: Start difference. First operand 48 states and 60 transitions. Second operand has 27 states, 23 states have (on average 1.7391304347826086) internal successors, (40), 21 states have internal predecessors, (40), 9 states have call successors, (15), 7 states have call predecessors, (15), 12 states have return successors, (16), 12 states have call predecessors, (16), 9 states have call successors, (16) [2022-01-10 06:36:50,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:36:50,324 INFO L93 Difference]: Finished difference Result 101 states and 139 transitions. [2022-01-10 06:36:50,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-01-10 06:36:50,324 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 23 states have (on average 1.7391304347826086) internal successors, (40), 21 states have internal predecessors, (40), 9 states have call successors, (15), 7 states have call predecessors, (15), 12 states have return successors, (16), 12 states have call predecessors, (16), 9 states have call successors, (16) Word has length 52 [2022-01-10 06:36:50,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:36:50,326 INFO L225 Difference]: With dead ends: 101 [2022-01-10 06:36:50,326 INFO L226 Difference]: Without dead ends: 97 [2022-01-10 06:36:50,327 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 73 SyntacticMatches, 5 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 558 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=377, Invalid=2073, Unknown=0, NotChecked=0, Total=2450 [2022-01-10 06:36:50,327 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 100 mSDsluCounter, 134 mSDsCounter, 0 mSdLazyCounter, 813 mSolverCounterSat, 203 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 160 SdHoareTripleChecker+Invalid, 1016 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 203 IncrementalHoareTripleChecker+Valid, 813 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-10 06:36:50,328 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [105 Valid, 160 Invalid, 1016 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [203 Valid, 813 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-10 06:36:50,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2022-01-10 06:36:50,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 80. [2022-01-10 06:36:50,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 45 states have (on average 1.0888888888888888) internal successors, (49), 45 states have internal predecessors, (49), 18 states have call successors, (18), 10 states have call predecessors, (18), 16 states have return successors, (44), 24 states have call predecessors, (44), 18 states have call successors, (44) [2022-01-10 06:36:50,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 111 transitions. [2022-01-10 06:36:50,339 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 111 transitions. Word has length 52 [2022-01-10 06:36:50,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:36:50,339 INFO L470 AbstractCegarLoop]: Abstraction has 80 states and 111 transitions. [2022-01-10 06:36:50,339 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 23 states have (on average 1.7391304347826086) internal successors, (40), 21 states have internal predecessors, (40), 9 states have call successors, (15), 7 states have call predecessors, (15), 12 states have return successors, (16), 12 states have call predecessors, (16), 9 states have call successors, (16) [2022-01-10 06:36:50,339 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 111 transitions. [2022-01-10 06:36:50,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-01-10 06:36:50,341 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:36:50,341 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:36:50,347 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2022-01-10 06:36:50,547 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 06:36:50,549 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:36:50,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:36:50,549 INFO L85 PathProgramCache]: Analyzing trace with hash -1359329167, now seen corresponding path program 3 times [2022-01-10 06:36:50,550 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:36:50,550 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1801083166] [2022-01-10 06:36:50,550 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-10 06:36:50,550 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:36:50,550 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:36:50,551 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 06:36:50,552 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 06:36:50,595 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-01-10 06:36:50,595 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 06:36:50,598 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 14 conjunts are in the unsatisfiable core [2022-01-10 06:36:50,599 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:36:50,733 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 34 proven. 19 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2022-01-10 06:36:50,733 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 06:36:51,183 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 34 proven. 28 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2022-01-10 06:36:51,183 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:36:51,183 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1801083166] [2022-01-10 06:36:51,183 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1801083166] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 06:36:51,183 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 06:36:51,183 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 15] total 19 [2022-01-10 06:36:51,184 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1072169291] [2022-01-10 06:36:51,184 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 06:36:51,184 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-10 06:36:51,184 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:36:51,184 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-10 06:36:51,185 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=288, Unknown=0, NotChecked=0, Total=342 [2022-01-10 06:36:51,185 INFO L87 Difference]: Start difference. First operand 80 states and 111 transitions. Second operand has 19 states, 17 states have (on average 2.176470588235294) internal successors, (37), 17 states have internal predecessors, (37), 9 states have call successors, (14), 1 states have call predecessors, (14), 8 states have return successors, (17), 12 states have call predecessors, (17), 9 states have call successors, (17) [2022-01-10 06:36:51,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:36:51,527 INFO L93 Difference]: Finished difference Result 159 states and 241 transitions. [2022-01-10 06:36:51,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-10 06:36:51,528 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 17 states have (on average 2.176470588235294) internal successors, (37), 17 states have internal predecessors, (37), 9 states have call successors, (14), 1 states have call predecessors, (14), 8 states have return successors, (17), 12 states have call predecessors, (17), 9 states have call successors, (17) Word has length 58 [2022-01-10 06:36:51,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:36:51,529 INFO L225 Difference]: With dead ends: 159 [2022-01-10 06:36:51,529 INFO L226 Difference]: Without dead ends: 84 [2022-01-10 06:36:51,530 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 95 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=99, Invalid=501, Unknown=0, NotChecked=0, Total=600 [2022-01-10 06:36:51,530 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 41 mSDsluCounter, 158 mSDsCounter, 0 mSdLazyCounter, 337 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 180 SdHoareTripleChecker+Invalid, 377 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 337 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-10 06:36:51,531 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [49 Valid, 180 Invalid, 377 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 337 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-10 06:36:51,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2022-01-10 06:36:51,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 71. [2022-01-10 06:36:51,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 40 states have (on average 1.05) internal successors, (42), 39 states have internal predecessors, (42), 18 states have call successors, (18), 10 states have call predecessors, (18), 12 states have return successors, (36), 21 states have call predecessors, (36), 18 states have call successors, (36) [2022-01-10 06:36:51,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 96 transitions. [2022-01-10 06:36:51,539 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 96 transitions. Word has length 58 [2022-01-10 06:36:51,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:36:51,539 INFO L470 AbstractCegarLoop]: Abstraction has 71 states and 96 transitions. [2022-01-10 06:36:51,540 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 17 states have (on average 2.176470588235294) internal successors, (37), 17 states have internal predecessors, (37), 9 states have call successors, (14), 1 states have call predecessors, (14), 8 states have return successors, (17), 12 states have call predecessors, (17), 9 states have call successors, (17) [2022-01-10 06:36:51,540 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 96 transitions. [2022-01-10 06:36:51,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-01-10 06:36:51,541 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:36:51,541 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 6, 5, 5, 5, 5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:36:51,548 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 06:36:51,747 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 06:36:51,748 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:36:51,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:36:51,748 INFO L85 PathProgramCache]: Analyzing trace with hash -244206325, now seen corresponding path program 4 times [2022-01-10 06:36:51,748 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:36:51,748 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1227748531] [2022-01-10 06:36:51,749 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-10 06:36:51,749 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:36:51,749 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:36:51,750 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 06:36:51,768 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 06:36:51,821 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-10 06:36:51,821 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 06:36:51,825 INFO L263 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 12 conjunts are in the unsatisfiable core [2022-01-10 06:36:51,827 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:36:51,926 INFO L134 CoverageAnalysis]: Checked inductivity of 244 backedges. 67 proven. 64 refuted. 0 times theorem prover too weak. 113 trivial. 0 not checked. [2022-01-10 06:36:51,927 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 06:36:52,327 INFO L134 CoverageAnalysis]: Checked inductivity of 244 backedges. 69 proven. 72 refuted. 0 times theorem prover too weak. 103 trivial. 0 not checked. [2022-01-10 06:36:52,327 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:36:52,327 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1227748531] [2022-01-10 06:36:52,327 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1227748531] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 06:36:52,327 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 06:36:52,327 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9] total 12 [2022-01-10 06:36:52,327 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2055700788] [2022-01-10 06:36:52,327 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 06:36:52,328 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-01-10 06:36:52,328 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:36:52,328 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-01-10 06:36:52,328 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2022-01-10 06:36:52,328 INFO L87 Difference]: Start difference. First operand 71 states and 96 transitions. Second operand has 12 states, 10 states have (on average 3.4) internal successors, (34), 10 states have internal predecessors, (34), 10 states have call successors, (15), 2 states have call predecessors, (15), 6 states have return successors, (18), 7 states have call predecessors, (18), 10 states have call successors, (18) [2022-01-10 06:36:52,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:36:52,560 INFO L93 Difference]: Finished difference Result 167 states and 312 transitions. [2022-01-10 06:36:52,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-10 06:36:52,561 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 10 states have (on average 3.4) internal successors, (34), 10 states have internal predecessors, (34), 10 states have call successors, (15), 2 states have call predecessors, (15), 6 states have return successors, (18), 7 states have call predecessors, (18), 10 states have call successors, (18) Word has length 72 [2022-01-10 06:36:52,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:36:52,563 INFO L225 Difference]: With dead ends: 167 [2022-01-10 06:36:52,563 INFO L226 Difference]: Without dead ends: 116 [2022-01-10 06:36:52,563 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 132 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=102, Invalid=240, Unknown=0, NotChecked=0, Total=342 [2022-01-10 06:36:52,564 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 39 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 184 mSolverCounterSat, 153 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 115 SdHoareTripleChecker+Invalid, 337 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 153 IncrementalHoareTripleChecker+Valid, 184 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-10 06:36:52,564 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [52 Valid, 115 Invalid, 337 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [153 Valid, 184 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-10 06:36:52,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2022-01-10 06:36:52,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 98. [2022-01-10 06:36:52,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 50 states have (on average 1.04) internal successors, (52), 49 states have internal predecessors, (52), 29 states have call successors, (29), 12 states have call predecessors, (29), 18 states have return successors, (97), 36 states have call predecessors, (97), 29 states have call successors, (97) [2022-01-10 06:36:52,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 178 transitions. [2022-01-10 06:36:52,578 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 178 transitions. Word has length 72 [2022-01-10 06:36:52,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:36:52,579 INFO L470 AbstractCegarLoop]: Abstraction has 98 states and 178 transitions. [2022-01-10 06:36:52,579 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 10 states have (on average 3.4) internal successors, (34), 10 states have internal predecessors, (34), 10 states have call successors, (15), 2 states have call predecessors, (15), 6 states have return successors, (18), 7 states have call predecessors, (18), 10 states have call successors, (18) [2022-01-10 06:36:52,579 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 178 transitions. [2022-01-10 06:36:52,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2022-01-10 06:36:52,580 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:36:52,581 INFO L514 BasicCegarLoop]: trace histogram [15, 15, 8, 7, 7, 7, 7, 7, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:36:52,603 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Ended with exit code 0 [2022-01-10 06:36:52,781 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 06:36:52,783 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:36:52,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:36:52,784 INFO L85 PathProgramCache]: Analyzing trace with hash 296645163, now seen corresponding path program 5 times [2022-01-10 06:36:52,784 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:36:52,784 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1593900055] [2022-01-10 06:36:52,784 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-10 06:36:52,784 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:36:52,785 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:36:52,785 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 06:36:52,788 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 06:36:52,900 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2022-01-10 06:36:52,900 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 06:36:52,907 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 14 conjunts are in the unsatisfiable core [2022-01-10 06:36:52,910 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:36:53,123 INFO L134 CoverageAnalysis]: Checked inductivity of 466 backedges. 110 proven. 63 refuted. 0 times theorem prover too weak. 293 trivial. 0 not checked. [2022-01-10 06:36:53,123 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 06:36:53,639 INFO L134 CoverageAnalysis]: Checked inductivity of 466 backedges. 111 proven. 72 refuted. 0 times theorem prover too weak. 283 trivial. 0 not checked. [2022-01-10 06:36:53,639 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:36:53,639 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1593900055] [2022-01-10 06:36:53,639 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1593900055] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 06:36:53,639 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 06:36:53,639 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 15] total 19 [2022-01-10 06:36:53,639 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1834350054] [2022-01-10 06:36:53,639 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 06:36:53,640 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-10 06:36:53,640 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:36:53,640 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-10 06:36:53,640 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=288, Unknown=0, NotChecked=0, Total=342 [2022-01-10 06:36:53,641 INFO L87 Difference]: Start difference. First operand 98 states and 178 transitions. Second operand has 19 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 17 states have internal predecessors, (36), 11 states have call successors, (15), 1 states have call predecessors, (15), 8 states have return successors, (18), 11 states have call predecessors, (18), 11 states have call successors, (18) [2022-01-10 06:36:53,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:36:53,938 INFO L93 Difference]: Finished difference Result 122 states and 219 transitions. [2022-01-10 06:36:53,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-01-10 06:36:53,938 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 17 states have internal predecessors, (36), 11 states have call successors, (15), 1 states have call predecessors, (15), 8 states have return successors, (18), 11 states have call predecessors, (18), 11 states have call successors, (18) Word has length 92 [2022-01-10 06:36:53,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:36:53,940 INFO L225 Difference]: With dead ends: 122 [2022-01-10 06:36:53,940 INFO L226 Difference]: Without dead ends: 118 [2022-01-10 06:36:53,940 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 164 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=112, Invalid=538, Unknown=0, NotChecked=0, Total=650 [2022-01-10 06:36:53,940 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 39 mSDsluCounter, 158 mSDsCounter, 0 mSdLazyCounter, 385 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 182 SdHoareTripleChecker+Invalid, 447 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 385 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-10 06:36:53,941 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [48 Valid, 182 Invalid, 447 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 385 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-10 06:36:53,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2022-01-10 06:36:53,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 105. [2022-01-10 06:36:53,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 52 states have (on average 1.0384615384615385) internal successors, (54), 51 states have internal predecessors, (54), 32 states have call successors, (32), 12 states have call predecessors, (32), 20 states have return successors, (110), 41 states have call predecessors, (110), 32 states have call successors, (110) [2022-01-10 06:36:53,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 196 transitions. [2022-01-10 06:36:53,952 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 196 transitions. Word has length 92 [2022-01-10 06:36:53,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:36:53,952 INFO L470 AbstractCegarLoop]: Abstraction has 105 states and 196 transitions. [2022-01-10 06:36:53,952 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 17 states have internal predecessors, (36), 11 states have call successors, (15), 1 states have call predecessors, (15), 8 states have return successors, (18), 11 states have call predecessors, (18), 11 states have call successors, (18) [2022-01-10 06:36:53,952 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 196 transitions. [2022-01-10 06:36:53,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2022-01-10 06:36:53,954 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:36:53,954 INFO L514 BasicCegarLoop]: trace histogram [15, 15, 8, 7, 7, 7, 7, 7, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:36:53,964 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 06:36:54,161 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 06:36:54,161 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:36:54,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:36:54,161 INFO L85 PathProgramCache]: Analyzing trace with hash 1624983153, now seen corresponding path program 6 times [2022-01-10 06:36:54,162 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:36:54,162 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1934090016] [2022-01-10 06:36:54,162 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-10 06:36:54,162 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:36:54,162 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:36:54,163 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 06:36:54,164 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 06:36:54,321 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2022-01-10 06:36:54,321 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 06:36:54,340 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 46 conjunts are in the unsatisfiable core [2022-01-10 06:36:54,343 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:36:54,922 INFO L134 CoverageAnalysis]: Checked inductivity of 476 backedges. 0 proven. 161 refuted. 0 times theorem prover too weak. 315 trivial. 0 not checked. [2022-01-10 06:36:54,923 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 06:36:56,673 INFO L134 CoverageAnalysis]: Checked inductivity of 476 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2022-01-10 06:36:56,673 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:36:56,673 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1934090016] [2022-01-10 06:36:56,673 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1934090016] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 06:36:56,673 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 06:36:56,673 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 32] total 45 [2022-01-10 06:36:56,673 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [422460672] [2022-01-10 06:36:56,674 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 06:36:56,677 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-01-10 06:36:56,677 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:36:56,678 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-01-10 06:36:56,678 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=160, Invalid=1820, Unknown=0, NotChecked=0, Total=1980 [2022-01-10 06:36:56,679 INFO L87 Difference]: Start difference. First operand 105 states and 196 transitions. Second operand has 45 states, 36 states have (on average 1.6944444444444444) internal successors, (61), 34 states have internal predecessors, (61), 16 states have call successors, (24), 11 states have call predecessors, (24), 21 states have return successors, (28), 22 states have call predecessors, (28), 16 states have call successors, (28) [2022-01-10 06:37:02,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:37:02,059 INFO L93 Difference]: Finished difference Result 282 states and 516 transitions. [2022-01-10 06:37:02,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2022-01-10 06:37:02,060 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 36 states have (on average 1.6944444444444444) internal successors, (61), 34 states have internal predecessors, (61), 16 states have call successors, (24), 11 states have call predecessors, (24), 21 states have return successors, (28), 22 states have call predecessors, (28), 16 states have call successors, (28) Word has length 98 [2022-01-10 06:37:02,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:37:02,062 INFO L225 Difference]: With dead ends: 282 [2022-01-10 06:37:02,062 INFO L226 Difference]: Without dead ends: 278 [2022-01-10 06:37:02,064 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 258 GetRequests, 141 SyntacticMatches, 11 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3155 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=1668, Invalid=9888, Unknown=0, NotChecked=0, Total=11556 [2022-01-10 06:37:02,065 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 411 mSDsluCounter, 280 mSDsCounter, 0 mSdLazyCounter, 2499 mSolverCounterSat, 977 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 417 SdHoareTripleChecker+Valid, 311 SdHoareTripleChecker+Invalid, 3476 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 977 IncrementalHoareTripleChecker+Valid, 2499 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-01-10 06:37:02,065 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [417 Valid, 311 Invalid, 3476 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [977 Valid, 2499 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2022-01-10 06:37:02,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 278 states. [2022-01-10 06:37:02,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 278 to 254. [2022-01-10 06:37:02,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 254 states, 123 states have (on average 1.056910569105691) internal successors, (130), 123 states have internal predecessors, (130), 74 states have call successors, (74), 28 states have call predecessors, (74), 56 states have return successors, (260), 102 states have call predecessors, (260), 74 states have call successors, (260) [2022-01-10 06:37:02,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 254 states to 254 states and 464 transitions. [2022-01-10 06:37:02,091 INFO L78 Accepts]: Start accepts. Automaton has 254 states and 464 transitions. Word has length 98 [2022-01-10 06:37:02,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:37:02,091 INFO L470 AbstractCegarLoop]: Abstraction has 254 states and 464 transitions. [2022-01-10 06:37:02,091 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 36 states have (on average 1.6944444444444444) internal successors, (61), 34 states have internal predecessors, (61), 16 states have call successors, (24), 11 states have call predecessors, (24), 21 states have return successors, (28), 22 states have call predecessors, (28), 16 states have call successors, (28) [2022-01-10 06:37:02,092 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states and 464 transitions. [2022-01-10 06:37:02,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2022-01-10 06:37:02,093 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:37:02,093 INFO L514 BasicCegarLoop]: trace histogram [15, 15, 8, 7, 7, 7, 7, 7, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:37:02,105 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 06:37:02,301 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 06:37:02,301 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:37:02,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:37:02,301 INFO L85 PathProgramCache]: Analyzing trace with hash -1480250389, now seen corresponding path program 7 times [2022-01-10 06:37:02,302 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:37:02,302 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1991963353] [2022-01-10 06:37:02,302 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-10 06:37:02,302 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:37:02,302 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:37:02,303 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 06:37:02,318 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 06:37:02,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:37:02,433 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 18 conjunts are in the unsatisfiable core [2022-01-10 06:37:02,435 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:37:02,636 INFO L134 CoverageAnalysis]: Checked inductivity of 492 backedges. 39 proven. 152 refuted. 0 times theorem prover too weak. 301 trivial. 0 not checked. [2022-01-10 06:37:02,636 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 06:37:03,237 INFO L134 CoverageAnalysis]: Checked inductivity of 492 backedges. 39 proven. 165 refuted. 0 times theorem prover too weak. 288 trivial. 0 not checked. [2022-01-10 06:37:03,237 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:37:03,237 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1991963353] [2022-01-10 06:37:03,237 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1991963353] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 06:37:03,238 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 06:37:03,238 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 17] total 20 [2022-01-10 06:37:03,238 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1892019454] [2022-01-10 06:37:03,238 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 06:37:03,238 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-10 06:37:03,238 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:37:03,238 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-10 06:37:03,238 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=328, Unknown=0, NotChecked=0, Total=380 [2022-01-10 06:37:03,239 INFO L87 Difference]: Start difference. First operand 254 states and 464 transitions. Second operand has 20 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 19 states have internal predecessors, (44), 14 states have call successors, (16), 1 states have call predecessors, (16), 8 states have return successors, (19), 9 states have call predecessors, (19), 14 states have call successors, (19) [2022-01-10 06:37:03,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:37:03,634 INFO L93 Difference]: Finished difference Result 288 states and 508 transitions. [2022-01-10 06:37:03,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-01-10 06:37:03,634 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 19 states have internal predecessors, (44), 14 states have call successors, (16), 1 states have call predecessors, (16), 8 states have return successors, (19), 9 states have call predecessors, (19), 14 states have call successors, (19) Word has length 104 [2022-01-10 06:37:03,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:37:03,636 INFO L225 Difference]: With dead ends: 288 [2022-01-10 06:37:03,636 INFO L226 Difference]: Without dead ends: 235 [2022-01-10 06:37:03,637 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 220 GetRequests, 189 SyntacticMatches, 3 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=138, Invalid=732, Unknown=0, NotChecked=0, Total=870 [2022-01-10 06:37:03,637 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 76 mSDsluCounter, 167 mSDsCounter, 0 mSdLazyCounter, 417 mSolverCounterSat, 95 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 194 SdHoareTripleChecker+Invalid, 512 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 95 IncrementalHoareTripleChecker+Valid, 417 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-10 06:37:03,637 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [89 Valid, 194 Invalid, 512 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [95 Valid, 417 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-10 06:37:03,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235 states. [2022-01-10 06:37:03,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235 to 229. [2022-01-10 06:37:03,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 229 states, 110 states have (on average 1.0454545454545454) internal successors, (115), 108 states have internal predecessors, (115), 69 states have call successors, (69), 26 states have call predecessors, (69), 49 states have return successors, (251), 94 states have call predecessors, (251), 69 states have call successors, (251) [2022-01-10 06:37:03,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 435 transitions. [2022-01-10 06:37:03,676 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 435 transitions. Word has length 104 [2022-01-10 06:37:03,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:37:03,676 INFO L470 AbstractCegarLoop]: Abstraction has 229 states and 435 transitions. [2022-01-10 06:37:03,676 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 19 states have internal predecessors, (44), 14 states have call successors, (16), 1 states have call predecessors, (16), 8 states have return successors, (19), 9 states have call predecessors, (19), 14 states have call successors, (19) [2022-01-10 06:37:03,676 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 435 transitions. [2022-01-10 06:37:03,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2022-01-10 06:37:03,681 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:37:03,681 INFO L514 BasicCegarLoop]: trace histogram [23, 23, 12, 11, 11, 11, 11, 11, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:37:03,709 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2022-01-10 06:37:03,884 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 06:37:03,885 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:37:03,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:37:03,885 INFO L85 PathProgramCache]: Analyzing trace with hash 1313628785, now seen corresponding path program 8 times [2022-01-10 06:37:03,885 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:37:03,885 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [610082984] [2022-01-10 06:37:03,885 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-10 06:37:03,886 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:37:03,886 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:37:03,892 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 06:37:03,923 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 06:37:04,032 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-10 06:37:04,033 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 06:37:04,047 INFO L263 TraceCheckSpWp]: Trace formula consists of 356 conjuncts, 16 conjunts are in the unsatisfiable core [2022-01-10 06:37:04,049 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:37:04,245 INFO L134 CoverageAnalysis]: Checked inductivity of 1136 backedges. 218 proven. 257 refuted. 0 times theorem prover too weak. 661 trivial. 0 not checked. [2022-01-10 06:37:04,245 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 06:37:04,976 INFO L134 CoverageAnalysis]: Checked inductivity of 1136 backedges. 223 proven. 278 refuted. 0 times theorem prover too weak. 635 trivial. 0 not checked. [2022-01-10 06:37:04,976 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:37:04,976 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [610082984] [2022-01-10 06:37:04,976 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [610082984] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 06:37:04,977 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 06:37:04,977 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 11] total 14 [2022-01-10 06:37:04,977 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1366657691] [2022-01-10 06:37:04,977 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 06:37:04,977 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-01-10 06:37:04,977 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:37:04,977 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-01-10 06:37:04,977 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2022-01-10 06:37:04,978 INFO L87 Difference]: Start difference. First operand 229 states and 435 transitions. Second operand has 14 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 12 states have call successors, (17), 2 states have call predecessors, (17), 7 states have return successors, (21), 8 states have call predecessors, (21), 12 states have call successors, (21) [2022-01-10 06:37:05,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:37:05,249 INFO L93 Difference]: Finished difference Result 432 states and 1064 transitions. [2022-01-10 06:37:05,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-01-10 06:37:05,250 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 12 states have call successors, (17), 2 states have call predecessors, (17), 7 states have return successors, (21), 8 states have call predecessors, (21), 12 states have call successors, (21) Word has length 138 [2022-01-10 06:37:05,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:37:05,252 INFO L225 Difference]: With dead ends: 432 [2022-01-10 06:37:05,252 INFO L226 Difference]: Without dead ends: 285 [2022-01-10 06:37:05,254 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 282 GetRequests, 262 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=131, Invalid=331, Unknown=0, NotChecked=0, Total=462 [2022-01-10 06:37:05,254 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 42 mSDsluCounter, 124 mSDsCounter, 0 mSdLazyCounter, 268 mSolverCounterSat, 135 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 154 SdHoareTripleChecker+Invalid, 403 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 135 IncrementalHoareTripleChecker+Valid, 268 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-10 06:37:05,254 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [55 Valid, 154 Invalid, 403 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [135 Valid, 268 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-10 06:37:05,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 285 states. [2022-01-10 06:37:05,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 285 to 259. [2022-01-10 06:37:05,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 259 states, 121 states have (on average 1.0413223140495869) internal successors, (126), 119 states have internal predecessors, (126), 81 states have call successors, (81), 28 states have call predecessors, (81), 56 states have return successors, (283), 111 states have call predecessors, (283), 81 states have call successors, (283) [2022-01-10 06:37:05,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 259 states to 259 states and 490 transitions. [2022-01-10 06:37:05,304 INFO L78 Accepts]: Start accepts. Automaton has 259 states and 490 transitions. Word has length 138 [2022-01-10 06:37:05,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:37:05,305 INFO L470 AbstractCegarLoop]: Abstraction has 259 states and 490 transitions. [2022-01-10 06:37:05,305 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 12 states have call successors, (17), 2 states have call predecessors, (17), 7 states have return successors, (21), 8 states have call predecessors, (21), 12 states have call successors, (21) [2022-01-10 06:37:05,305 INFO L276 IsEmpty]: Start isEmpty. Operand 259 states and 490 transitions. [2022-01-10 06:37:05,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2022-01-10 06:37:05,306 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:37:05,307 INFO L514 BasicCegarLoop]: trace histogram [31, 31, 16, 15, 15, 15, 15, 15, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:37:05,321 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2022-01-10 06:37:05,515 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 06:37:05,515 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:37:05,515 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:37:05,516 INFO L85 PathProgramCache]: Analyzing trace with hash 149752433, now seen corresponding path program 9 times [2022-01-10 06:37:05,516 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:37:05,516 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1758598673] [2022-01-10 06:37:05,516 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-10 06:37:05,516 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:37:05,516 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:37:05,522 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:37:05,524 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2022-01-10 06:37:05,637 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2022-01-10 06:37:05,637 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 06:37:05,643 INFO L263 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 16 conjunts are in the unsatisfiable core [2022-01-10 06:37:05,645 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:37:05,903 INFO L134 CoverageAnalysis]: Checked inductivity of 2084 backedges. 97 proven. 343 refuted. 0 times theorem prover too weak. 1644 trivial. 0 not checked. [2022-01-10 06:37:05,903 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 06:37:06,709 INFO L134 CoverageAnalysis]: Checked inductivity of 2084 backedges. 97 proven. 356 refuted. 0 times theorem prover too weak. 1631 trivial. 0 not checked. [2022-01-10 06:37:06,709 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:37:06,710 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1758598673] [2022-01-10 06:37:06,710 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1758598673] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 06:37:06,710 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 06:37:06,710 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 17] total 19 [2022-01-10 06:37:06,710 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1764223067] [2022-01-10 06:37:06,710 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 06:37:06,710 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-10 06:37:06,710 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:37:06,711 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-10 06:37:06,711 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=293, Unknown=0, NotChecked=0, Total=342 [2022-01-10 06:37:06,711 INFO L87 Difference]: Start difference. First operand 259 states and 490 transitions. Second operand has 19 states, 18 states have (on average 2.1666666666666665) internal successors, (39), 18 states have internal predecessors, (39), 13 states have call successors, (16), 1 states have call predecessors, (16), 8 states have return successors, (19), 9 states have call predecessors, (19), 13 states have call successors, (19) [2022-01-10 06:37:07,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:37:07,228 INFO L93 Difference]: Finished difference Result 424 states and 959 transitions. [2022-01-10 06:37:07,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-01-10 06:37:07,229 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 2.1666666666666665) internal successors, (39), 18 states have internal predecessors, (39), 13 states have call successors, (16), 1 states have call predecessors, (16), 8 states have return successors, (19), 9 states have call predecessors, (19), 13 states have call successors, (19) Word has length 178 [2022-01-10 06:37:07,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:37:07,232 INFO L225 Difference]: With dead ends: 424 [2022-01-10 06:37:07,233 INFO L226 Difference]: Without dead ends: 247 [2022-01-10 06:37:07,234 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 371 GetRequests, 331 SyntacticMatches, 6 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=232, Invalid=1028, Unknown=0, NotChecked=0, Total=1260 [2022-01-10 06:37:07,235 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 37 mSDsluCounter, 172 mSDsCounter, 0 mSdLazyCounter, 420 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 201 SdHoareTripleChecker+Invalid, 481 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 420 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-10 06:37:07,235 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 201 Invalid, 481 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 420 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-10 06:37:07,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 247 states. [2022-01-10 06:37:07,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 247 to 233. [2022-01-10 06:37:07,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 233 states, 109 states have (on average 1.0458715596330275) internal successors, (114), 109 states have internal predecessors, (114), 75 states have call successors, (75), 26 states have call predecessors, (75), 48 states have return successors, (209), 97 states have call predecessors, (209), 75 states have call successors, (209) [2022-01-10 06:37:07,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 233 states to 233 states and 398 transitions. [2022-01-10 06:37:07,267 INFO L78 Accepts]: Start accepts. Automaton has 233 states and 398 transitions. Word has length 178 [2022-01-10 06:37:07,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:37:07,267 INFO L470 AbstractCegarLoop]: Abstraction has 233 states and 398 transitions. [2022-01-10 06:37:07,268 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 2.1666666666666665) internal successors, (39), 18 states have internal predecessors, (39), 13 states have call successors, (16), 1 states have call predecessors, (16), 8 states have return successors, (19), 9 states have call predecessors, (19), 13 states have call successors, (19) [2022-01-10 06:37:07,268 INFO L276 IsEmpty]: Start isEmpty. Operand 233 states and 398 transitions. [2022-01-10 06:37:07,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 185 [2022-01-10 06:37:07,269 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:37:07,270 INFO L514 BasicCegarLoop]: trace histogram [31, 31, 16, 15, 15, 15, 15, 15, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:37:07,277 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (13)] Ended with exit code 0 [2022-01-10 06:37:07,477 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 06:37:07,477 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:37:07,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:37:07,478 INFO L85 PathProgramCache]: Analyzing trace with hash -2072776725, now seen corresponding path program 10 times [2022-01-10 06:37:07,478 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:37:07,478 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1823103830] [2022-01-10 06:37:07,478 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-10 06:37:07,478 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:37:07,479 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:37:07,479 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:37:07,480 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2022-01-10 06:37:07,647 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-10 06:37:07,647 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 06:37:07,660 INFO L263 TraceCheckSpWp]: Trace formula consists of 472 conjuncts, 88 conjunts are in the unsatisfiable core [2022-01-10 06:37:07,664 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:37:08,288 INFO L134 CoverageAnalysis]: Checked inductivity of 2100 backedges. 0 proven. 705 refuted. 0 times theorem prover too weak. 1395 trivial. 0 not checked. [2022-01-10 06:37:08,288 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 06:37:12,624 INFO L134 CoverageAnalysis]: Checked inductivity of 2100 backedges. 0 proven. 2025 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2022-01-10 06:37:12,624 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:37:12,624 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1823103830] [2022-01-10 06:37:12,624 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1823103830] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 06:37:12,624 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 06:37:12,624 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 58] total 75 [2022-01-10 06:37:12,624 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1072261039] [2022-01-10 06:37:12,624 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 06:37:12,626 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 75 states [2022-01-10 06:37:12,626 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:37:12,626 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2022-01-10 06:37:12,628 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=268, Invalid=5282, Unknown=0, NotChecked=0, Total=5550 [2022-01-10 06:37:12,628 INFO L87 Difference]: Start difference. First operand 233 states and 398 transitions. Second operand has 75 states, 57 states have (on average 1.719298245614035) internal successors, (98), 57 states have internal predecessors, (98), 29 states have call successors, (41), 19 states have call predecessors, (41), 36 states have return successors, (48), 38 states have call predecessors, (48), 29 states have call successors, (48) [2022-01-10 06:37:39,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:37:39,811 INFO L93 Difference]: Finished difference Result 575 states and 964 transitions. [2022-01-10 06:37:39,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 172 states. [2022-01-10 06:37:39,812 INFO L78 Accepts]: Start accepts. Automaton has has 75 states, 57 states have (on average 1.719298245614035) internal successors, (98), 57 states have internal predecessors, (98), 29 states have call successors, (41), 19 states have call predecessors, (41), 36 states have return successors, (48), 38 states have call predecessors, (48), 29 states have call successors, (48) Word has length 184 [2022-01-10 06:37:39,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:37:39,818 INFO L225 Difference]: With dead ends: 575 [2022-01-10 06:37:39,818 INFO L226 Difference]: Without dead ends: 571 [2022-01-10 06:37:39,825 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 524 GetRequests, 260 SyntacticMatches, 34 SemanticMatches, 230 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16378 ImplicationChecksByTransitivity, 22.5s TimeCoverageRelationStatistics Valid=7747, Invalid=45845, Unknown=0, NotChecked=0, Total=53592 [2022-01-10 06:37:39,826 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 1862 mSDsluCounter, 657 mSDsCounter, 0 mSdLazyCounter, 7843 mSolverCounterSat, 5141 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1869 SdHoareTripleChecker+Valid, 693 SdHoareTripleChecker+Invalid, 12984 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5141 IncrementalHoareTripleChecker+Valid, 7843 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.7s IncrementalHoareTripleChecker+Time [2022-01-10 06:37:39,826 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1869 Valid, 693 Invalid, 12984 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5141 Valid, 7843 Invalid, 0 Unknown, 0 Unchecked, 6.7s Time] [2022-01-10 06:37:39,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 571 states. [2022-01-10 06:37:39,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 571 to 535. [2022-01-10 06:37:39,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 535 states, 257 states have (on average 1.0544747081712063) internal successors, (271), 258 states have internal predecessors, (271), 165 states have call successors, (165), 66 states have call predecessors, (165), 112 states have return successors, (473), 210 states have call predecessors, (473), 165 states have call successors, (473) [2022-01-10 06:37:39,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 535 states to 535 states and 909 transitions. [2022-01-10 06:37:39,888 INFO L78 Accepts]: Start accepts. Automaton has 535 states and 909 transitions. Word has length 184 [2022-01-10 06:37:39,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:37:39,890 INFO L470 AbstractCegarLoop]: Abstraction has 535 states and 909 transitions. [2022-01-10 06:37:39,891 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 75 states, 57 states have (on average 1.719298245614035) internal successors, (98), 57 states have internal predecessors, (98), 29 states have call successors, (41), 19 states have call predecessors, (41), 36 states have return successors, (48), 38 states have call predecessors, (48), 29 states have call successors, (48) [2022-01-10 06:37:39,891 INFO L276 IsEmpty]: Start isEmpty. Operand 535 states and 909 transitions. [2022-01-10 06:37:39,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2022-01-10 06:37:39,893 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:37:39,893 INFO L514 BasicCegarLoop]: trace histogram [31, 31, 16, 15, 15, 15, 15, 15, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:37:39,919 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (14)] Ended with exit code 0 [2022-01-10 06:37:40,103 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 06:37:40,103 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:37:40,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:37:40,104 INFO L85 PathProgramCache]: Analyzing trace with hash -1729878095, now seen corresponding path program 11 times [2022-01-10 06:37:40,104 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:37:40,104 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [655630235] [2022-01-10 06:37:40,104 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-10 06:37:40,104 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:37:40,104 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:37:40,105 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:37:40,107 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2022-01-10 06:37:40,433 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 27 check-sat command(s) [2022-01-10 06:37:40,433 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 06:37:40,446 INFO L263 TraceCheckSpWp]: Trace formula consists of 480 conjuncts, 22 conjunts are in the unsatisfiable core [2022-01-10 06:37:40,449 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:37:40,768 INFO L134 CoverageAnalysis]: Checked inductivity of 2122 backedges. 314 proven. 216 refuted. 0 times theorem prover too weak. 1592 trivial. 0 not checked. [2022-01-10 06:37:40,768 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 06:37:41,796 INFO L134 CoverageAnalysis]: Checked inductivity of 2122 backedges. 317 proven. 245 refuted. 0 times theorem prover too weak. 1560 trivial. 0 not checked. [2022-01-10 06:37:41,797 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:37:41,797 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [655630235] [2022-01-10 06:37:41,797 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [655630235] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 06:37:41,797 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 06:37:41,797 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 23] total 27 [2022-01-10 06:37:41,797 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [482866367] [2022-01-10 06:37:41,797 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 06:37:41,797 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-01-10 06:37:41,797 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:37:41,798 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-01-10 06:37:41,798 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=620, Unknown=0, NotChecked=0, Total=702 [2022-01-10 06:37:41,798 INFO L87 Difference]: Start difference. First operand 535 states and 909 transitions. Second operand has 27 states, 25 states have (on average 2.04) internal successors, (51), 25 states have internal predecessors, (51), 16 states have call successors, (20), 1 states have call predecessors, (20), 12 states have return successors, (27), 15 states have call predecessors, (27), 16 states have call successors, (27) [2022-01-10 06:37:42,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:37:42,360 INFO L93 Difference]: Finished difference Result 600 states and 1006 transitions. [2022-01-10 06:37:42,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-01-10 06:37:42,361 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 25 states have (on average 2.04) internal successors, (51), 25 states have internal predecessors, (51), 16 states have call successors, (20), 1 states have call predecessors, (20), 12 states have return successors, (27), 15 states have call predecessors, (27), 16 states have call successors, (27) Word has length 190 [2022-01-10 06:37:42,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:37:42,364 INFO L225 Difference]: With dead ends: 600 [2022-01-10 06:37:42,364 INFO L226 Difference]: Without dead ends: 517 [2022-01-10 06:37:42,365 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 388 GetRequests, 350 SyntacticMatches, 3 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=177, Invalid=1155, Unknown=0, NotChecked=0, Total=1332 [2022-01-10 06:37:42,365 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 109 mSDsluCounter, 271 mSDsCounter, 0 mSdLazyCounter, 735 mSolverCounterSat, 136 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 119 SdHoareTripleChecker+Valid, 305 SdHoareTripleChecker+Invalid, 871 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 136 IncrementalHoareTripleChecker+Valid, 735 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-10 06:37:42,365 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [119 Valid, 305 Invalid, 871 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [136 Valid, 735 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-10 06:37:42,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 517 states. [2022-01-10 06:37:42,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 517 to 506. [2022-01-10 06:37:42,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 506 states, 243 states have (on average 1.0493827160493827) internal successors, (255), 242 states have internal predecessors, (255), 159 states have call successors, (159), 65 states have call predecessors, (159), 103 states have return successors, (460), 198 states have call predecessors, (460), 159 states have call successors, (460) [2022-01-10 06:37:42,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 506 states to 506 states and 874 transitions. [2022-01-10 06:37:42,405 INFO L78 Accepts]: Start accepts. Automaton has 506 states and 874 transitions. Word has length 190 [2022-01-10 06:37:42,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:37:42,405 INFO L470 AbstractCegarLoop]: Abstraction has 506 states and 874 transitions. [2022-01-10 06:37:42,405 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 25 states have (on average 2.04) internal successors, (51), 25 states have internal predecessors, (51), 16 states have call successors, (20), 1 states have call predecessors, (20), 12 states have return successors, (27), 15 states have call predecessors, (27), 16 states have call successors, (27) [2022-01-10 06:37:42,405 INFO L276 IsEmpty]: Start isEmpty. Operand 506 states and 874 transitions. [2022-01-10 06:37:42,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 333 [2022-01-10 06:37:42,409 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:37:42,409 INFO L514 BasicCegarLoop]: trace histogram [63, 63, 32, 31, 31, 31, 31, 31, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:37:42,421 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2022-01-10 06:37:42,619 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 06:37:42,619 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:37:42,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:37:42,620 INFO L85 PathProgramCache]: Analyzing trace with hash 652983851, now seen corresponding path program 12 times [2022-01-10 06:37:42,620 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:37:42,620 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [949994951] [2022-01-10 06:37:42,620 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-10 06:37:42,620 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:37:42,620 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:37:42,621 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:37:42,647 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2022-01-10 06:37:42,782 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2022-01-10 06:37:42,782 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 06:37:42,788 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 14 conjunts are in the unsatisfiable core [2022-01-10 06:37:42,792 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:37:43,253 INFO L134 CoverageAnalysis]: Checked inductivity of 8746 backedges. 288 proven. 433 refuted. 0 times theorem prover too weak. 8025 trivial. 0 not checked. [2022-01-10 06:37:43,254 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 06:37:44,420 INFO L134 CoverageAnalysis]: Checked inductivity of 8746 backedges. 288 proven. 438 refuted. 0 times theorem prover too weak. 8020 trivial. 0 not checked. [2022-01-10 06:37:44,420 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:37:44,420 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [949994951] [2022-01-10 06:37:44,420 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [949994951] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 06:37:44,420 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 06:37:44,420 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 17 [2022-01-10 06:37:44,420 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1674095021] [2022-01-10 06:37:44,420 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 06:37:44,421 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-10 06:37:44,422 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:37:44,422 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-10 06:37:44,422 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2022-01-10 06:37:44,422 INFO L87 Difference]: Start difference. First operand 506 states and 874 transitions. Second operand has 17 states, 14 states have (on average 2.357142857142857) internal successors, (33), 15 states have internal predecessors, (33), 11 states have call successors, (16), 1 states have call predecessors, (16), 6 states have return successors, (17), 10 states have call predecessors, (17), 11 states have call successors, (17) [2022-01-10 06:37:44,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:37:44,687 INFO L93 Difference]: Finished difference Result 558 states and 931 transitions. [2022-01-10 06:37:44,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-01-10 06:37:44,687 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 14 states have (on average 2.357142857142857) internal successors, (33), 15 states have internal predecessors, (33), 11 states have call successors, (16), 1 states have call predecessors, (16), 6 states have return successors, (17), 10 states have call predecessors, (17), 11 states have call successors, (17) Word has length 332 [2022-01-10 06:37:44,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:37:44,691 INFO L225 Difference]: With dead ends: 558 [2022-01-10 06:37:44,691 INFO L226 Difference]: Without dead ends: 554 [2022-01-10 06:37:44,692 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 671 GetRequests, 644 SyntacticMatches, 3 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=119, Invalid=531, Unknown=0, NotChecked=0, Total=650 [2022-01-10 06:37:44,693 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 35 mSDsluCounter, 95 mSDsCounter, 0 mSdLazyCounter, 226 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 117 SdHoareTripleChecker+Invalid, 262 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 226 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-10 06:37:44,694 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [40 Valid, 117 Invalid, 262 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 226 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-10 06:37:44,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 554 states. [2022-01-10 06:37:44,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 554 to 506. [2022-01-10 06:37:44,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 506 states, 243 states have (on average 1.0493827160493827) internal successors, (255), 242 states have internal predecessors, (255), 159 states have call successors, (159), 65 states have call predecessors, (159), 103 states have return successors, (459), 198 states have call predecessors, (459), 159 states have call successors, (459) [2022-01-10 06:37:44,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 506 states to 506 states and 873 transitions. [2022-01-10 06:37:44,733 INFO L78 Accepts]: Start accepts. Automaton has 506 states and 873 transitions. Word has length 332 [2022-01-10 06:37:44,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:37:44,734 INFO L470 AbstractCegarLoop]: Abstraction has 506 states and 873 transitions. [2022-01-10 06:37:44,734 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 14 states have (on average 2.357142857142857) internal successors, (33), 15 states have internal predecessors, (33), 11 states have call successors, (16), 1 states have call predecessors, (16), 6 states have return successors, (17), 10 states have call predecessors, (17), 11 states have call successors, (17) [2022-01-10 06:37:44,734 INFO L276 IsEmpty]: Start isEmpty. Operand 506 states and 873 transitions. [2022-01-10 06:37:44,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 345 [2022-01-10 06:37:44,738 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:37:44,738 INFO L514 BasicCegarLoop]: trace histogram [63, 63, 32, 31, 31, 31, 31, 31, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:37:44,747 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2022-01-10 06:37:44,946 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 06:37:44,946 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:37:44,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:37:44,947 INFO L85 PathProgramCache]: Analyzing trace with hash -1351583765, now seen corresponding path program 13 times [2022-01-10 06:37:44,947 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:37:44,947 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1950144582] [2022-01-10 06:37:44,947 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-10 06:37:44,947 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:37:44,947 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:37:44,949 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:37:44,975 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2022-01-10 06:37:45,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:37:45,407 INFO L263 TraceCheckSpWp]: Trace formula consists of 904 conjuncts, 22 conjunts are in the unsatisfiable core [2022-01-10 06:37:45,411 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:37:45,877 INFO L134 CoverageAnalysis]: Checked inductivity of 8772 backedges. 214 proven. 1127 refuted. 0 times theorem prover too weak. 7431 trivial. 0 not checked. [2022-01-10 06:37:45,877 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 06:37:47,265 INFO L134 CoverageAnalysis]: Checked inductivity of 8772 backedges. 214 proven. 1161 refuted. 0 times theorem prover too weak. 7397 trivial. 0 not checked. [2022-01-10 06:37:47,265 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:37:47,265 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1950144582] [2022-01-10 06:37:47,265 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1950144582] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 06:37:47,265 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 06:37:47,266 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 23] total 27 [2022-01-10 06:37:47,266 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1520742604] [2022-01-10 06:37:47,266 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 06:37:47,266 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-01-10 06:37:47,266 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:37:47,266 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-01-10 06:37:47,266 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=620, Unknown=0, NotChecked=0, Total=702 [2022-01-10 06:37:47,267 INFO L87 Difference]: Start difference. First operand 506 states and 873 transitions. Second operand has 27 states, 25 states have (on average 2.0) internal successors, (50), 25 states have internal predecessors, (50), 19 states have call successors, (21), 1 states have call predecessors, (21), 12 states have return successors, (28), 13 states have call predecessors, (28), 19 states have call successors, (28) [2022-01-10 06:37:47,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:37:47,796 INFO L93 Difference]: Finished difference Result 774 states and 1576 transitions. [2022-01-10 06:37:47,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-01-10 06:37:47,796 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 25 states have (on average 2.0) internal successors, (50), 25 states have internal predecessors, (50), 19 states have call successors, (21), 1 states have call predecessors, (21), 12 states have return successors, (28), 13 states have call predecessors, (28), 19 states have call successors, (28) Word has length 344 [2022-01-10 06:37:47,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:37:47,800 INFO L225 Difference]: With dead ends: 774 [2022-01-10 06:37:47,800 INFO L226 Difference]: Without dead ends: 556 [2022-01-10 06:37:47,802 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 697 GetRequests, 658 SyntacticMatches, 3 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=194, Invalid=1212, Unknown=0, NotChecked=0, Total=1406 [2022-01-10 06:37:47,802 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 68 mSDsluCounter, 358 mSDsCounter, 0 mSdLazyCounter, 878 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 392 SdHoareTripleChecker+Invalid, 934 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 878 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-10 06:37:47,803 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [88 Valid, 392 Invalid, 934 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 878 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-10 06:37:47,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 556 states. [2022-01-10 06:37:47,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 556 to 504. [2022-01-10 06:37:47,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 504 states, 243 states have (on average 1.0493827160493827) internal successors, (255), 242 states have internal predecessors, (255), 157 states have call successors, (157), 65 states have call predecessors, (157), 103 states have return successors, (380), 196 states have call predecessors, (380), 157 states have call successors, (380) [2022-01-10 06:37:47,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 504 states to 504 states and 792 transitions. [2022-01-10 06:37:47,842 INFO L78 Accepts]: Start accepts. Automaton has 504 states and 792 transitions. Word has length 344 [2022-01-10 06:37:47,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:37:47,843 INFO L470 AbstractCegarLoop]: Abstraction has 504 states and 792 transitions. [2022-01-10 06:37:47,843 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 25 states have (on average 2.0) internal successors, (50), 25 states have internal predecessors, (50), 19 states have call successors, (21), 1 states have call predecessors, (21), 12 states have return successors, (28), 13 states have call predecessors, (28), 19 states have call successors, (28) [2022-01-10 06:37:47,843 INFO L276 IsEmpty]: Start isEmpty. Operand 504 states and 792 transitions. [2022-01-10 06:37:47,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 351 [2022-01-10 06:37:47,846 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:37:47,846 INFO L514 BasicCegarLoop]: trace histogram [63, 63, 32, 31, 31, 31, 31, 31, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:37:47,861 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2022-01-10 06:37:48,058 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 06:37:48,059 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:37:48,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:37:48,059 INFO L85 PathProgramCache]: Analyzing trace with hash -430264399, now seen corresponding path program 14 times [2022-01-10 06:37:48,060 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:37:48,060 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [632258590] [2022-01-10 06:37:48,060 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-10 06:37:48,060 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:37:48,060 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:37:48,061 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:37:48,087 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2022-01-10 06:37:48,561 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-10 06:37:48,561 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 06:37:48,591 INFO L263 TraceCheckSpWp]: Trace formula consists of 912 conjuncts, 170 conjunts are in the unsatisfiable core [2022-01-10 06:37:48,597 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:37:49,851 INFO L134 CoverageAnalysis]: Checked inductivity of 8794 backedges. 0 proven. 2940 refuted. 0 times theorem prover too weak. 5854 trivial. 0 not checked. [2022-01-10 06:37:49,852 INFO L328 TraceCheckSpWp]: Computing backward predicates...