/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/seq-mthreaded-reduced/pals_lcr.3.ufo.BOUNDED-6.pals.c.v+cfa-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-a10ec3b [2022-01-10 07:13:38,295 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-10 07:13:38,296 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-10 07:13:38,344 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-01-10 07:13:38,377 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 07:13:38,412 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-10 07:13:38,413 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-10 07:13:38,414 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-01-10 07:13:38,414 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-01-10 07:13:38,415 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-01-10 07:13:38,415 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-01-10 07:13:38,415 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-01-10 07:13:38,415 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-01-10 07:13:38,415 INFO L138 SettingsManager]: * Use SBE=true [2022-01-10 07:13:38,415 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-10 07:13:38,415 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-10 07:13:38,416 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-10 07:13:38,416 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-10 07:13:38,416 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-10 07:13:38,416 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-10 07:13:38,416 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-01-10 07:13:38,416 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-01-10 07:13:38,416 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-01-10 07:13:38,416 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-10 07:13:38,417 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-10 07:13:38,417 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-10 07:13:38,417 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-10 07:13:38,417 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-10 07:13:38,417 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-10 07:13:38,417 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-10 07:13:38,418 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-01-10 07:13:38,418 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-01-10 07:13:38,418 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2022-01-10 07:13:38,418 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-01-10 07:13:38,418 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-01-10 07:13:38,418 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-01-10 07:13:38,418 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-01-10 07:13:38,418 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-01-10 07:13:38,418 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-10 07:13:38,636 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-10 07:13:38,653 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-10 07:13:38,656 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-10 07:13:38,657 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-10 07:13:38,657 INFO L275 PluginConnector]: CDTParser initialized [2022-01-10 07:13:38,658 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr.3.ufo.BOUNDED-6.pals.c.v+cfa-reducer.c [2022-01-10 07:13:38,720 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/24e99245d/fdc0731802be4dc2b43c4108a3dc293a/FLAGbe00e6c7a [2022-01-10 07:13:39,171 INFO L306 CDTParser]: Found 1 translation units. [2022-01-10 07:13:39,174 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr.3.ufo.BOUNDED-6.pals.c.v+cfa-reducer.c [2022-01-10 07:13:39,189 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/24e99245d/fdc0731802be4dc2b43c4108a3dc293a/FLAGbe00e6c7a [2022-01-10 07:13:39,551 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/24e99245d/fdc0731802be4dc2b43c4108a3dc293a [2022-01-10 07:13:39,553 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-10 07:13:39,554 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-01-10 07:13:39,555 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-10 07:13:39,555 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-10 07:13:39,559 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-10 07:13:39,563 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 07:13:39" (1/1) ... [2022-01-10 07:13:39,564 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2d68ba90 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 07:13:39, skipping insertion in model container [2022-01-10 07:13:39,564 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 07:13:39" (1/1) ... [2022-01-10 07:13:39,570 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-10 07:13:39,604 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-10 07:13:39,763 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr.3.ufo.BOUNDED-6.pals.c.v+cfa-reducer.c[4067,4080] [2022-01-10 07:13:39,779 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-10 07:13:39,790 INFO L203 MainTranslator]: Completed pre-run [2022-01-10 07:13:39,821 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr.3.ufo.BOUNDED-6.pals.c.v+cfa-reducer.c[4067,4080] [2022-01-10 07:13:39,830 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-10 07:13:39,843 INFO L208 MainTranslator]: Completed translation [2022-01-10 07:13:39,843 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 07:13:39 WrapperNode [2022-01-10 07:13:39,843 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-10 07:13:39,844 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-01-10 07:13:39,845 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-01-10 07:13:39,845 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-01-10 07:13:39,852 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 07:13:39" (1/1) ... [2022-01-10 07:13:39,860 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 07:13:39" (1/1) ... [2022-01-10 07:13:39,881 INFO L137 Inliner]: procedures = 22, calls = 7, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 260 [2022-01-10 07:13:39,882 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-01-10 07:13:39,883 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-10 07:13:39,883 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-10 07:13:39,883 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-10 07:13:39,889 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 07:13:39" (1/1) ... [2022-01-10 07:13:39,890 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 07:13:39" (1/1) ... [2022-01-10 07:13:39,893 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 07:13:39" (1/1) ... [2022-01-10 07:13:39,894 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 07:13:39" (1/1) ... [2022-01-10 07:13:39,900 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 07:13:39" (1/1) ... [2022-01-10 07:13:39,903 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 07:13:39" (1/1) ... [2022-01-10 07:13:39,905 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 07:13:39" (1/1) ... [2022-01-10 07:13:39,908 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-10 07:13:39,908 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-10 07:13:39,908 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-10 07:13:39,909 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-10 07:13:39,909 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 07:13:39" (1/1) ... [2022-01-10 07:13:39,916 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-10 07:13:39,926 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 07:13:39,938 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 07:13:39,957 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 07:13:39,976 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-10 07:13:39,976 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-01-10 07:13:39,976 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-10 07:13:39,976 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-10 07:13:40,059 INFO L234 CfgBuilder]: Building ICFG [2022-01-10 07:13:40,061 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-10 07:13:40,359 INFO L275 CfgBuilder]: Performing block encoding [2022-01-10 07:13:40,365 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-10 07:13:40,366 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2022-01-10 07:13:40,367 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 07:13:40 BoogieIcfgContainer [2022-01-10 07:13:40,368 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-10 07:13:40,369 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-10 07:13:40,369 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-10 07:13:40,372 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-10 07:13:40,373 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 10.01 07:13:39" (1/3) ... [2022-01-10 07:13:40,373 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@565a80de and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 07:13:40, skipping insertion in model container [2022-01-10 07:13:40,373 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 07:13:39" (2/3) ... [2022-01-10 07:13:40,374 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@565a80de and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 07:13:40, skipping insertion in model container [2022-01-10 07:13:40,374 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 07:13:40" (3/3) ... [2022-01-10 07:13:40,375 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr.3.ufo.BOUNDED-6.pals.c.v+cfa-reducer.c [2022-01-10 07:13:40,379 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-01-10 07:13:40,379 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-10 07:13:40,419 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-10 07:13:40,425 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 07:13:40,425 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-01-10 07:13:40,437 INFO L276 IsEmpty]: Start isEmpty. Operand has 62 states, 60 states have (on average 1.7166666666666666) internal successors, (103), 61 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:13:40,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-01-10 07:13:40,443 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 07:13:40,444 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 07:13:40,445 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 07:13:40,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 07:13:40,450 INFO L85 PathProgramCache]: Analyzing trace with hash -1007825277, now seen corresponding path program 1 times [2022-01-10 07:13:40,460 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 07:13:40,461 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1376003702] [2022-01-10 07:13:40,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 07:13:40,462 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 07:13:40,462 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 07:13:40,467 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 07:13:40,509 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 07:13:40,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 07:13:40,597 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-10 07:13:40,602 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 07:13:40,735 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 07:13:40,736 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 07:13:40,736 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 07:13:40,737 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1376003702] [2022-01-10 07:13:40,737 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1376003702] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 07:13:40,737 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 07:13:40,738 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 07:13:40,740 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [228500489] [2022-01-10 07:13:40,740 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 07:13:40,744 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 07:13:40,745 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 07:13:40,773 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 07:13:40,774 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 07:13:40,777 INFO L87 Difference]: Start difference. First operand has 62 states, 60 states have (on average 1.7166666666666666) internal successors, (103), 61 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 12.0) internal successors, (36), 3 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:13:40,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 07:13:40,850 INFO L93 Difference]: Finished difference Result 140 states and 224 transitions. [2022-01-10 07:13:40,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 07:13:40,855 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 12.0) internal successors, (36), 3 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2022-01-10 07:13:40,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 07:13:40,865 INFO L225 Difference]: With dead ends: 140 [2022-01-10 07:13:40,866 INFO L226 Difference]: Without dead ends: 91 [2022-01-10 07:13:40,868 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 07:13:40,872 INFO L933 BasicCegarLoop]: 150 mSDtfsCounter, 68 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 215 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 07:13:40,873 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [68 Valid, 215 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 07:13:40,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2022-01-10 07:13:40,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 89. [2022-01-10 07:13:40,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 88 states have (on average 1.4772727272727273) internal successors, (130), 88 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:13:40,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 130 transitions. [2022-01-10 07:13:40,924 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 130 transitions. Word has length 36 [2022-01-10 07:13:40,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 07:13:40,925 INFO L470 AbstractCegarLoop]: Abstraction has 89 states and 130 transitions. [2022-01-10 07:13:40,925 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.0) internal successors, (36), 3 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:13:40,925 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 130 transitions. [2022-01-10 07:13:40,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-01-10 07:13:40,927 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 07:13:40,927 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 07:13:40,940 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Ended with exit code 0 [2022-01-10 07:13:41,136 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 07:13:41,137 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 07:13:41,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 07:13:41,138 INFO L85 PathProgramCache]: Analyzing trace with hash 1176817218, now seen corresponding path program 1 times [2022-01-10 07:13:41,139 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 07:13:41,140 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [437721698] [2022-01-10 07:13:41,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 07:13:41,140 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 07:13:41,140 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 07:13:41,144 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 07:13:41,145 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 07:13:41,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 07:13:41,232 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-10 07:13:41,235 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 07:13:41,320 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 07:13:41,321 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 07:13:41,321 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 07:13:41,322 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [437721698] [2022-01-10 07:13:41,322 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [437721698] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 07:13:41,322 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 07:13:41,322 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 07:13:41,323 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1543935498] [2022-01-10 07:13:41,326 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 07:13:41,330 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 07:13:41,330 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 07:13:41,331 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 07:13:41,331 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 07:13:41,331 INFO L87 Difference]: Start difference. First operand 89 states and 130 transitions. Second operand has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:13:41,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 07:13:41,364 INFO L93 Difference]: Finished difference Result 213 states and 326 transitions. [2022-01-10 07:13:41,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 07:13:41,367 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2022-01-10 07:13:41,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 07:13:41,369 INFO L225 Difference]: With dead ends: 213 [2022-01-10 07:13:41,369 INFO L226 Difference]: Without dead ends: 143 [2022-01-10 07:13:41,370 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 07:13:41,371 INFO L933 BasicCegarLoop]: 120 mSDtfsCounter, 48 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 182 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 07:13:41,371 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [48 Valid, 182 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 07:13:41,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2022-01-10 07:13:41,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 141. [2022-01-10 07:13:41,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 140 states have (on average 1.5142857142857142) internal successors, (212), 140 states have internal predecessors, (212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:13:41,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 212 transitions. [2022-01-10 07:13:41,390 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 212 transitions. Word has length 37 [2022-01-10 07:13:41,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 07:13:41,391 INFO L470 AbstractCegarLoop]: Abstraction has 141 states and 212 transitions. [2022-01-10 07:13:41,394 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:13:41,394 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 212 transitions. [2022-01-10 07:13:41,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-01-10 07:13:41,401 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 07:13:41,401 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 07:13:41,412 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 07:13:41,612 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 07:13:41,613 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 07:13:41,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 07:13:41,613 INFO L85 PathProgramCache]: Analyzing trace with hash 761408425, now seen corresponding path program 1 times [2022-01-10 07:13:41,614 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 07:13:41,614 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [509043156] [2022-01-10 07:13:41,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 07:13:41,614 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 07:13:41,615 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 07:13:41,616 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 07:13:41,619 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 07:13:41,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 07:13:41,694 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-10 07:13:41,697 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 07:13:42,004 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 07:13:42,005 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 07:13:42,005 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 07:13:42,005 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [509043156] [2022-01-10 07:13:42,005 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [509043156] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 07:13:42,006 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 07:13:42,006 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 07:13:42,006 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [422402093] [2022-01-10 07:13:42,006 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 07:13:42,006 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 07:13:42,007 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 07:13:42,007 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 07:13:42,007 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-10 07:13:42,008 INFO L87 Difference]: Start difference. First operand 141 states and 212 transitions. Second operand has 5 states, 5 states have (on average 7.6) internal successors, (38), 4 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:13:42,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 07:13:42,062 INFO L93 Difference]: Finished difference Result 271 states and 416 transitions. [2022-01-10 07:13:42,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-10 07:13:42,063 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.6) internal successors, (38), 4 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2022-01-10 07:13:42,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 07:13:42,064 INFO L225 Difference]: With dead ends: 271 [2022-01-10 07:13:42,064 INFO L226 Difference]: Without dead ends: 149 [2022-01-10 07:13:42,065 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2022-01-10 07:13:42,066 INFO L933 BasicCegarLoop]: 72 mSDtfsCounter, 12 mSDsluCounter, 121 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 193 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 31 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 07:13:42,066 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 193 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 24 Invalid, 0 Unknown, 31 Unchecked, 0.0s Time] [2022-01-10 07:13:42,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2022-01-10 07:13:42,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 149. [2022-01-10 07:13:42,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 148 states have (on average 1.5) internal successors, (222), 148 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:13:42,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 222 transitions. [2022-01-10 07:13:42,080 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 222 transitions. Word has length 38 [2022-01-10 07:13:42,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 07:13:42,081 INFO L470 AbstractCegarLoop]: Abstraction has 149 states and 222 transitions. [2022-01-10 07:13:42,081 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.6) internal successors, (38), 4 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:13:42,081 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 222 transitions. [2022-01-10 07:13:42,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-01-10 07:13:42,082 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 07:13:42,082 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 07:13:42,093 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 07:13:42,291 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 07:13:42,291 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 07:13:42,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 07:13:42,292 INFO L85 PathProgramCache]: Analyzing trace with hash 1533272078, now seen corresponding path program 1 times [2022-01-10 07:13:42,292 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 07:13:42,293 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [354549886] [2022-01-10 07:13:42,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 07:13:42,294 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 07:13:42,294 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 07:13:42,297 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 07:13:42,299 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 07:13:42,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 07:13:42,363 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-10 07:13:42,365 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 07:13:42,427 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 07:13:42,428 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 07:13:42,428 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 07:13:42,428 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [354549886] [2022-01-10 07:13:42,428 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [354549886] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 07:13:42,428 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 07:13:42,428 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 07:13:42,429 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [66835904] [2022-01-10 07:13:42,429 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 07:13:42,429 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 07:13:42,429 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 07:13:42,430 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 07:13:42,430 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 07:13:42,430 INFO L87 Difference]: Start difference. First operand 149 states and 222 transitions. Second operand has 3 states, 3 states have (on average 12.666666666666666) internal successors, (38), 3 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:13:42,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 07:13:42,449 INFO L93 Difference]: Finished difference Result 361 states and 556 transitions. [2022-01-10 07:13:42,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 07:13:42,450 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 12.666666666666666) internal successors, (38), 3 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2022-01-10 07:13:42,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 07:13:42,451 INFO L225 Difference]: With dead ends: 361 [2022-01-10 07:13:42,451 INFO L226 Difference]: Without dead ends: 239 [2022-01-10 07:13:42,452 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 07:13:42,453 INFO L933 BasicCegarLoop]: 112 mSDtfsCounter, 43 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 178 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 07:13:42,453 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [43 Valid, 178 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 07:13:42,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239 states. [2022-01-10 07:13:42,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239 to 237. [2022-01-10 07:13:42,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 237 states, 236 states have (on average 1.5169491525423728) internal successors, (358), 236 states have internal predecessors, (358), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:13:42,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 237 states to 237 states and 358 transitions. [2022-01-10 07:13:42,471 INFO L78 Accepts]: Start accepts. Automaton has 237 states and 358 transitions. Word has length 38 [2022-01-10 07:13:42,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 07:13:42,471 INFO L470 AbstractCegarLoop]: Abstraction has 237 states and 358 transitions. [2022-01-10 07:13:42,471 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.666666666666666) internal successors, (38), 3 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:13:42,472 INFO L276 IsEmpty]: Start isEmpty. Operand 237 states and 358 transitions. [2022-01-10 07:13:42,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-01-10 07:13:42,472 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 07:13:42,472 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 07:13:42,482 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 07:13:42,681 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 07:13:42,682 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 07:13:42,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 07:13:42,682 INFO L85 PathProgramCache]: Analyzing trace with hash 172600953, now seen corresponding path program 1 times [2022-01-10 07:13:42,683 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 07:13:42,683 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [438923043] [2022-01-10 07:13:42,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 07:13:42,683 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 07:13:42,684 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 07:13:42,684 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 07:13:42,685 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 07:13:42,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 07:13:42,749 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-10 07:13:42,750 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 07:13:43,091 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 07:13:43,091 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 07:13:43,091 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 07:13:43,092 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [438923043] [2022-01-10 07:13:43,092 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [438923043] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 07:13:43,095 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 07:13:43,095 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-10 07:13:43,096 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1125314743] [2022-01-10 07:13:43,096 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 07:13:43,096 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 07:13:43,097 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 07:13:43,097 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 07:13:43,097 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-01-10 07:13:43,097 INFO L87 Difference]: Start difference. First operand 237 states and 358 transitions. Second operand has 5 states, 5 states have (on average 7.8) internal successors, (39), 5 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:13:43,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 07:13:43,191 INFO L93 Difference]: Finished difference Result 1077 states and 1674 transitions. [2022-01-10 07:13:43,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-10 07:13:43,192 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.8) internal successors, (39), 5 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2022-01-10 07:13:43,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 07:13:43,195 INFO L225 Difference]: With dead ends: 1077 [2022-01-10 07:13:43,196 INFO L226 Difference]: Without dead ends: 867 [2022-01-10 07:13:43,196 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-01-10 07:13:43,197 INFO L933 BasicCegarLoop]: 76 mSDtfsCounter, 261 mSDsluCounter, 208 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 261 SdHoareTripleChecker+Valid, 284 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 07:13:43,197 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [261 Valid, 284 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-10 07:13:43,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 867 states. [2022-01-10 07:13:43,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 867 to 653. [2022-01-10 07:13:43,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 653 states, 652 states have (on average 1.51840490797546) internal successors, (990), 652 states have internal predecessors, (990), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:13:43,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 653 states to 653 states and 990 transitions. [2022-01-10 07:13:43,236 INFO L78 Accepts]: Start accepts. Automaton has 653 states and 990 transitions. Word has length 39 [2022-01-10 07:13:43,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 07:13:43,236 INFO L470 AbstractCegarLoop]: Abstraction has 653 states and 990 transitions. [2022-01-10 07:13:43,237 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.8) internal successors, (39), 5 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:13:43,237 INFO L276 IsEmpty]: Start isEmpty. Operand 653 states and 990 transitions. [2022-01-10 07:13:43,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-01-10 07:13:43,237 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 07:13:43,237 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 07:13:43,250 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 07:13:43,446 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 07:13:43,447 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 07:13:43,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 07:13:43,447 INFO L85 PathProgramCache]: Analyzing trace with hash 1738935381, now seen corresponding path program 1 times [2022-01-10 07:13:43,448 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 07:13:43,448 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1980176897] [2022-01-10 07:13:43,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 07:13:43,448 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 07:13:43,448 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 07:13:43,449 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 07:13:43,450 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 07:13:43,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 07:13:43,511 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-10 07:13:43,512 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 07:13:43,602 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 07:13:43,602 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 07:13:43,602 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 07:13:43,602 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1980176897] [2022-01-10 07:13:43,603 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1980176897] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 07:13:43,603 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 07:13:43,603 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 07:13:43,603 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [888523782] [2022-01-10 07:13:43,603 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 07:13:43,603 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 07:13:43,603 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 07:13:43,604 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 07:13:43,604 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 07:13:43,604 INFO L87 Difference]: Start difference. First operand 653 states and 990 transitions. Second operand has 3 states, 3 states have (on average 13.666666666666666) internal successors, (41), 3 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:13:43,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 07:13:43,658 INFO L93 Difference]: Finished difference Result 1577 states and 2404 transitions. [2022-01-10 07:13:43,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 07:13:43,659 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 13.666666666666666) internal successors, (41), 3 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2022-01-10 07:13:43,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 07:13:43,664 INFO L225 Difference]: With dead ends: 1577 [2022-01-10 07:13:43,664 INFO L226 Difference]: Without dead ends: 951 [2022-01-10 07:13:43,665 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 07:13:43,668 INFO L933 BasicCegarLoop]: 97 mSDtfsCounter, 34 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 155 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 07:13:43,669 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 155 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 07:13:43,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 951 states. [2022-01-10 07:13:43,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 951 to 949. [2022-01-10 07:13:43,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 949 states, 948 states have (on average 1.5) internal successors, (1422), 948 states have internal predecessors, (1422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:13:43,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 949 states to 949 states and 1422 transitions. [2022-01-10 07:13:43,713 INFO L78 Accepts]: Start accepts. Automaton has 949 states and 1422 transitions. Word has length 41 [2022-01-10 07:13:43,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 07:13:43,713 INFO L470 AbstractCegarLoop]: Abstraction has 949 states and 1422 transitions. [2022-01-10 07:13:43,713 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.666666666666666) internal successors, (41), 3 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:13:43,713 INFO L276 IsEmpty]: Start isEmpty. Operand 949 states and 1422 transitions. [2022-01-10 07:13:43,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-01-10 07:13:43,716 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 07:13:43,717 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 07:13:43,730 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 07:13:43,926 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 07:13:43,926 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 07:13:43,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 07:13:43,927 INFO L85 PathProgramCache]: Analyzing trace with hash -1278405158, now seen corresponding path program 1 times [2022-01-10 07:13:43,927 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 07:13:43,927 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1080664408] [2022-01-10 07:13:43,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 07:13:43,927 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 07:13:43,927 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 07:13:43,928 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 07:13:43,930 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 07:13:44,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 07:13:44,004 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-10 07:13:44,006 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 07:13:44,094 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 07:13:44,094 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 07:13:44,095 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 07:13:44,095 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1080664408] [2022-01-10 07:13:44,095 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1080664408] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 07:13:44,095 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 07:13:44,095 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 07:13:44,095 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [704038234] [2022-01-10 07:13:44,095 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 07:13:44,097 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-10 07:13:44,097 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 07:13:44,098 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-10 07:13:44,098 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-10 07:13:44,098 INFO L87 Difference]: Start difference. First operand 949 states and 1422 transitions. Second operand has 4 states, 4 states have (on average 10.5) internal successors, (42), 4 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:13:44,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 07:13:44,180 INFO L93 Difference]: Finished difference Result 1769 states and 2633 transitions. [2022-01-10 07:13:44,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-10 07:13:44,181 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 10.5) internal successors, (42), 4 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2022-01-10 07:13:44,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 07:13:44,187 INFO L225 Difference]: With dead ends: 1769 [2022-01-10 07:13:44,188 INFO L226 Difference]: Without dead ends: 1767 [2022-01-10 07:13:44,188 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-10 07:13:44,189 INFO L933 BasicCegarLoop]: 110 mSDtfsCounter, 110 mSDsluCounter, 155 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 265 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 07:13:44,189 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [110 Valid, 265 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 07:13:44,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1767 states. [2022-01-10 07:13:44,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1767 to 1005. [2022-01-10 07:13:44,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1005 states, 1004 states have (on average 1.4681274900398407) internal successors, (1474), 1004 states have internal predecessors, (1474), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:13:44,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1005 states to 1005 states and 1474 transitions. [2022-01-10 07:13:44,272 INFO L78 Accepts]: Start accepts. Automaton has 1005 states and 1474 transitions. Word has length 42 [2022-01-10 07:13:44,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 07:13:44,272 INFO L470 AbstractCegarLoop]: Abstraction has 1005 states and 1474 transitions. [2022-01-10 07:13:44,272 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.5) internal successors, (42), 4 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:13:44,272 INFO L276 IsEmpty]: Start isEmpty. Operand 1005 states and 1474 transitions. [2022-01-10 07:13:44,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-01-10 07:13:44,274 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 07:13:44,274 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 07:13:44,287 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2022-01-10 07:13:44,474 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 07:13:44,475 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 07:13:44,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 07:13:44,475 INFO L85 PathProgramCache]: Analyzing trace with hash 1616122195, now seen corresponding path program 1 times [2022-01-10 07:13:44,476 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 07:13:44,476 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [51780127] [2022-01-10 07:13:44,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 07:13:44,476 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 07:13:44,476 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 07:13:44,478 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 07:13:44,480 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 07:13:44,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 07:13:44,549 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-10 07:13:44,551 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 07:13:45,104 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 07:13:45,104 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 07:13:45,530 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 07:13:45,531 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 07:13:45,531 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [51780127] [2022-01-10 07:13:45,531 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [51780127] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 07:13:45,531 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 07:13:45,531 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2022-01-10 07:13:45,531 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [826994754] [2022-01-10 07:13:45,531 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 07:13:45,532 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-10 07:13:45,532 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 07:13:45,532 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-10 07:13:45,533 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2022-01-10 07:13:45,533 INFO L87 Difference]: Start difference. First operand 1005 states and 1474 transitions. Second operand has 16 states, 16 states have (on average 6.5) internal successors, (104), 15 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:13:45,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 07:13:45,698 INFO L93 Difference]: Finished difference Result 1697 states and 2507 transitions. [2022-01-10 07:13:45,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-10 07:13:45,698 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 6.5) internal successors, (104), 15 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 60 [2022-01-10 07:13:45,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 07:13:45,702 INFO L225 Difference]: With dead ends: 1697 [2022-01-10 07:13:45,702 INFO L226 Difference]: Without dead ends: 1023 [2022-01-10 07:13:45,703 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=75, Invalid=267, Unknown=0, NotChecked=0, Total=342 [2022-01-10 07:13:45,704 INFO L933 BasicCegarLoop]: 62 mSDtfsCounter, 70 mSDsluCounter, 509 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 571 SdHoareTripleChecker+Invalid, 109 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 70 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 07:13:45,704 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [70 Valid, 571 Invalid, 109 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 36 Invalid, 0 Unknown, 70 Unchecked, 0.0s Time] [2022-01-10 07:13:45,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1023 states. [2022-01-10 07:13:45,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1023 to 1022. [2022-01-10 07:13:45,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1022 states, 1021 states have (on average 1.464250734573947) internal successors, (1495), 1021 states have internal predecessors, (1495), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:13:45,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1022 states to 1022 states and 1495 transitions. [2022-01-10 07:13:45,748 INFO L78 Accepts]: Start accepts. Automaton has 1022 states and 1495 transitions. Word has length 60 [2022-01-10 07:13:45,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 07:13:45,748 INFO L470 AbstractCegarLoop]: Abstraction has 1022 states and 1495 transitions. [2022-01-10 07:13:45,748 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 6.5) internal successors, (104), 15 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:13:45,748 INFO L276 IsEmpty]: Start isEmpty. Operand 1022 states and 1495 transitions. [2022-01-10 07:13:45,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-01-10 07:13:45,749 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 07:13:45,749 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 07:13:45,759 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2022-01-10 07:13:45,955 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 07:13:45,956 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 07:13:45,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 07:13:45,956 INFO L85 PathProgramCache]: Analyzing trace with hash 1912167623, now seen corresponding path program 1 times [2022-01-10 07:13:45,957 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 07:13:45,957 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [656054646] [2022-01-10 07:13:45,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 07:13:45,957 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 07:13:45,957 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 07:13:45,958 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 07:13:45,960 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 07:13:46,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 07:13:46,030 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-10 07:13:46,032 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 07:13:46,884 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 07:13:46,884 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 07:13:47,141 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 07:13:47,142 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 07:13:47,142 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [656054646] [2022-01-10 07:13:47,142 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [656054646] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 07:13:47,142 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 07:13:47,142 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2022-01-10 07:13:47,142 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1356068910] [2022-01-10 07:13:47,142 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 07:13:47,143 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-10 07:13:47,143 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 07:13:47,143 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-10 07:13:47,144 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2022-01-10 07:13:47,144 INFO L87 Difference]: Start difference. First operand 1022 states and 1495 transitions. Second operand has 16 states, 16 states have (on average 6.875) internal successors, (110), 15 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:13:47,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 07:13:47,354 INFO L93 Difference]: Finished difference Result 1759 states and 2580 transitions. [2022-01-10 07:13:47,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-10 07:13:47,355 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 6.875) internal successors, (110), 15 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 60 [2022-01-10 07:13:47,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 07:13:47,359 INFO L225 Difference]: With dead ends: 1759 [2022-01-10 07:13:47,360 INFO L226 Difference]: Without dead ends: 1085 [2022-01-10 07:13:47,361 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=84, Invalid=296, Unknown=0, NotChecked=0, Total=380 [2022-01-10 07:13:47,362 INFO L933 BasicCegarLoop]: 64 mSDtfsCounter, 90 mSDsluCounter, 442 mSDsCounter, 0 mSdLazyCounter, 83 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 506 SdHoareTripleChecker+Invalid, 248 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 83 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 161 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 07:13:47,362 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [90 Valid, 506 Invalid, 248 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 83 Invalid, 0 Unknown, 161 Unchecked, 0.1s Time] [2022-01-10 07:13:47,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1085 states. [2022-01-10 07:13:47,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1085 to 1032. [2022-01-10 07:13:47,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1032 states, 1031 states have (on average 1.463627546071775) internal successors, (1509), 1031 states have internal predecessors, (1509), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:13:47,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1032 states to 1032 states and 1509 transitions. [2022-01-10 07:13:47,414 INFO L78 Accepts]: Start accepts. Automaton has 1032 states and 1509 transitions. Word has length 60 [2022-01-10 07:13:47,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 07:13:47,415 INFO L470 AbstractCegarLoop]: Abstraction has 1032 states and 1509 transitions. [2022-01-10 07:13:47,415 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 6.875) internal successors, (110), 15 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:13:47,415 INFO L276 IsEmpty]: Start isEmpty. Operand 1032 states and 1509 transitions. [2022-01-10 07:13:47,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-01-10 07:13:47,416 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 07:13:47,416 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 07:13:47,431 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 07:13:47,625 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 07:13:47,625 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 07:13:47,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 07:13:47,626 INFO L85 PathProgramCache]: Analyzing trace with hash -878113000, now seen corresponding path program 1 times [2022-01-10 07:13:47,626 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 07:13:47,626 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [594933762] [2022-01-10 07:13:47,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 07:13:47,626 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 07:13:47,626 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 07:13:47,627 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 07:13:47,629 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 07:13:47,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 07:13:47,688 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-10 07:13:47,689 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 07:13:47,911 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-10 07:13:47,911 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 07:13:47,911 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 07:13:47,911 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [594933762] [2022-01-10 07:13:47,911 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [594933762] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 07:13:47,912 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 07:13:47,912 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 07:13:47,912 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [603212477] [2022-01-10 07:13:47,912 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 07:13:47,912 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 07:13:47,912 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 07:13:47,913 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 07:13:47,913 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-10 07:13:47,913 INFO L87 Difference]: Start difference. First operand 1032 states and 1509 transitions. Second operand has 5 states, 5 states have (on average 11.6) internal successors, (58), 4 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:13:47,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 07:13:47,992 INFO L93 Difference]: Finished difference Result 2010 states and 2954 transitions. [2022-01-10 07:13:47,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-10 07:13:47,993 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 11.6) internal successors, (58), 4 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 60 [2022-01-10 07:13:47,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 07:13:47,997 INFO L225 Difference]: With dead ends: 2010 [2022-01-10 07:13:47,997 INFO L226 Difference]: Without dead ends: 1032 [2022-01-10 07:13:47,999 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2022-01-10 07:13:47,999 INFO L933 BasicCegarLoop]: 68 mSDtfsCounter, 11 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 160 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 16 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 07:13:48,000 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 160 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 34 Invalid, 0 Unknown, 16 Unchecked, 0.0s Time] [2022-01-10 07:13:48,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1032 states. [2022-01-10 07:13:48,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1032 to 1032. [2022-01-10 07:13:48,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1032 states, 1031 states have (on average 1.4626576139670222) internal successors, (1508), 1031 states have internal predecessors, (1508), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:13:48,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1032 states to 1032 states and 1508 transitions. [2022-01-10 07:13:48,041 INFO L78 Accepts]: Start accepts. Automaton has 1032 states and 1508 transitions. Word has length 60 [2022-01-10 07:13:48,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 07:13:48,041 INFO L470 AbstractCegarLoop]: Abstraction has 1032 states and 1508 transitions. [2022-01-10 07:13:48,041 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.6) internal successors, (58), 4 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:13:48,042 INFO L276 IsEmpty]: Start isEmpty. Operand 1032 states and 1508 transitions. [2022-01-10 07:13:48,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-01-10 07:13:48,042 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 07:13:48,042 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 07:13:48,054 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 07:13:48,251 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 07:13:48,252 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 07:13:48,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 07:13:48,252 INFO L85 PathProgramCache]: Analyzing trace with hash -558222797, now seen corresponding path program 1 times [2022-01-10 07:13:48,252 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 07:13:48,252 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2074417408] [2022-01-10 07:13:48,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 07:13:48,253 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 07:13:48,253 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 07:13:48,254 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 07:13:48,255 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 07:13:48,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 07:13:48,312 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-10 07:13:48,313 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 07:13:48,522 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-01-10 07:13:48,522 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 07:13:48,522 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 07:13:48,522 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2074417408] [2022-01-10 07:13:48,523 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2074417408] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 07:13:48,523 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 07:13:48,523 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 07:13:48,523 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1306665708] [2022-01-10 07:13:48,523 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 07:13:48,523 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 07:13:48,523 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 07:13:48,524 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 07:13:48,524 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-10 07:13:48,524 INFO L87 Difference]: Start difference. First operand 1032 states and 1508 transitions. Second operand has 5 states, 5 states have (on average 11.2) internal successors, (56), 4 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:13:48,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 07:13:48,598 INFO L93 Difference]: Finished difference Result 2010 states and 2953 transitions. [2022-01-10 07:13:48,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-10 07:13:48,599 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 11.2) internal successors, (56), 4 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 60 [2022-01-10 07:13:48,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 07:13:48,602 INFO L225 Difference]: With dead ends: 2010 [2022-01-10 07:13:48,603 INFO L226 Difference]: Without dead ends: 1032 [2022-01-10 07:13:48,604 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2022-01-10 07:13:48,604 INFO L933 BasicCegarLoop]: 77 mSDtfsCounter, 25 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 121 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 7 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 07:13:48,605 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [25 Valid, 121 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 25 Invalid, 0 Unknown, 7 Unchecked, 0.0s Time] [2022-01-10 07:13:48,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1032 states. [2022-01-10 07:13:48,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1032 to 1032. [2022-01-10 07:13:48,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1032 states, 1031 states have (on average 1.4616876818622697) internal successors, (1507), 1031 states have internal predecessors, (1507), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:13:48,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1032 states to 1032 states and 1507 transitions. [2022-01-10 07:13:48,645 INFO L78 Accepts]: Start accepts. Automaton has 1032 states and 1507 transitions. Word has length 60 [2022-01-10 07:13:48,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 07:13:48,645 INFO L470 AbstractCegarLoop]: Abstraction has 1032 states and 1507 transitions. [2022-01-10 07:13:48,646 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.2) internal successors, (56), 4 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:13:48,646 INFO L276 IsEmpty]: Start isEmpty. Operand 1032 states and 1507 transitions. [2022-01-10 07:13:48,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-01-10 07:13:48,646 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 07:13:48,647 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 07:13:48,659 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 07:13:48,855 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 07:13:48,856 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 07:13:48,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 07:13:48,856 INFO L85 PathProgramCache]: Analyzing trace with hash 2098261170, now seen corresponding path program 1 times [2022-01-10 07:13:48,856 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 07:13:48,856 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [601841039] [2022-01-10 07:13:48,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 07:13:48,857 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 07:13:48,857 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 07:13:48,858 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 07:13:48,860 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 07:13:48,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 07:13:48,922 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-10 07:13:48,923 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 07:13:48,998 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-10 07:13:48,998 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 07:13:48,998 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 07:13:48,999 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [601841039] [2022-01-10 07:13:48,999 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [601841039] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 07:13:48,999 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 07:13:48,999 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 07:13:48,999 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [456531095] [2022-01-10 07:13:48,999 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 07:13:48,999 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 07:13:48,999 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 07:13:49,000 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 07:13:49,000 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 07:13:49,000 INFO L87 Difference]: Start difference. First operand 1032 states and 1507 transitions. Second operand has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:13:49,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 07:13:49,070 INFO L93 Difference]: Finished difference Result 2010 states and 2952 transitions. [2022-01-10 07:13:49,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 07:13:49,071 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 61 [2022-01-10 07:13:49,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 07:13:49,075 INFO L225 Difference]: With dead ends: 2010 [2022-01-10 07:13:49,076 INFO L226 Difference]: Without dead ends: 1032 [2022-01-10 07:13:49,077 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 07:13:49,077 INFO L933 BasicCegarLoop]: 65 mSDtfsCounter, 52 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 07:13:49,078 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [52 Valid, 90 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 07:13:49,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1032 states. [2022-01-10 07:13:49,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1032 to 1032. [2022-01-10 07:13:49,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1032 states, 1031 states have (on average 1.443258971871969) internal successors, (1488), 1031 states have internal predecessors, (1488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:13:49,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1032 states to 1032 states and 1488 transitions. [2022-01-10 07:13:49,121 INFO L78 Accepts]: Start accepts. Automaton has 1032 states and 1488 transitions. Word has length 61 [2022-01-10 07:13:49,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 07:13:49,121 INFO L470 AbstractCegarLoop]: Abstraction has 1032 states and 1488 transitions. [2022-01-10 07:13:49,121 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:13:49,121 INFO L276 IsEmpty]: Start isEmpty. Operand 1032 states and 1488 transitions. [2022-01-10 07:13:49,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-01-10 07:13:49,124 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 07:13:49,124 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 07:13:49,133 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2022-01-10 07:13:49,332 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 07:13:49,333 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 07:13:49,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 07:13:49,333 INFO L85 PathProgramCache]: Analyzing trace with hash 1662233234, now seen corresponding path program 1 times [2022-01-10 07:13:49,333 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 07:13:49,334 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [439279875] [2022-01-10 07:13:49,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 07:13:49,334 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 07:13:49,334 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 07:13:49,335 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 07:13:49,335 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 07:13:49,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 07:13:49,402 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-10 07:13:49,403 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 07:13:49,510 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 07:13:49,510 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 07:13:49,510 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 07:13:49,511 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [439279875] [2022-01-10 07:13:49,511 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [439279875] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 07:13:49,511 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 07:13:49,511 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 07:13:49,511 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2043746713] [2022-01-10 07:13:49,511 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 07:13:49,511 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 07:13:49,511 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 07:13:49,512 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 07:13:49,512 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 07:13:49,512 INFO L87 Difference]: Start difference. First operand 1032 states and 1488 transitions. Second operand has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:13:49,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 07:13:49,555 INFO L93 Difference]: Finished difference Result 1731 states and 2513 transitions. [2022-01-10 07:13:49,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 07:13:49,555 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 61 [2022-01-10 07:13:49,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 07:13:49,558 INFO L225 Difference]: With dead ends: 1731 [2022-01-10 07:13:49,558 INFO L226 Difference]: Without dead ends: 753 [2022-01-10 07:13:49,560 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 07:13:49,562 INFO L933 BasicCegarLoop]: 105 mSDtfsCounter, 36 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 173 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 07:13:49,562 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 173 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 07:13:49,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 753 states. [2022-01-10 07:13:49,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 753 to 747. [2022-01-10 07:13:49,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 747 states, 746 states have (on average 1.4302949061662198) internal successors, (1067), 746 states have internal predecessors, (1067), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:13:49,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 747 states to 747 states and 1067 transitions. [2022-01-10 07:13:49,597 INFO L78 Accepts]: Start accepts. Automaton has 747 states and 1067 transitions. Word has length 61 [2022-01-10 07:13:49,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 07:13:49,597 INFO L470 AbstractCegarLoop]: Abstraction has 747 states and 1067 transitions. [2022-01-10 07:13:49,597 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:13:49,597 INFO L276 IsEmpty]: Start isEmpty. Operand 747 states and 1067 transitions. [2022-01-10 07:13:49,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-01-10 07:13:49,600 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 07:13:49,600 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 07:13:49,612 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2022-01-10 07:13:49,809 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 07:13:49,810 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 07:13:49,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 07:13:49,810 INFO L85 PathProgramCache]: Analyzing trace with hash 1509662092, now seen corresponding path program 1 times [2022-01-10 07:13:49,810 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 07:13:49,810 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2021612562] [2022-01-10 07:13:49,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 07:13:49,810 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 07:13:49,810 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 07:13:49,811 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 07:13:49,812 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 07:13:49,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 07:13:49,876 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-10 07:13:49,877 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 07:13:50,645 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 07:13:50,646 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 07:13:50,973 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 07:13:50,973 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 07:13:50,973 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2021612562] [2022-01-10 07:13:50,973 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2021612562] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 07:13:50,973 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 07:13:50,973 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2022-01-10 07:13:50,973 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1306916987] [2022-01-10 07:13:50,973 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 07:13:50,974 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-10 07:13:50,974 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 07:13:50,974 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-10 07:13:50,974 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2022-01-10 07:13:50,974 INFO L87 Difference]: Start difference. First operand 747 states and 1067 transitions. Second operand has 16 states, 16 states have (on average 7.25) internal successors, (116), 15 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:13:51,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 07:13:51,063 INFO L93 Difference]: Finished difference Result 1437 states and 2080 transitions. [2022-01-10 07:13:51,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-10 07:13:51,063 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 7.25) internal successors, (116), 15 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 61 [2022-01-10 07:13:51,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 07:13:51,066 INFO L225 Difference]: With dead ends: 1437 [2022-01-10 07:13:51,066 INFO L226 Difference]: Without dead ends: 763 [2022-01-10 07:13:51,067 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 106 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2022-01-10 07:13:51,068 INFO L933 BasicCegarLoop]: 64 mSDtfsCounter, 39 mSDsluCounter, 495 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 559 SdHoareTripleChecker+Invalid, 102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 77 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 07:13:51,068 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 559 Invalid, 102 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 24 Invalid, 0 Unknown, 77 Unchecked, 0.0s Time] [2022-01-10 07:13:51,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 763 states. [2022-01-10 07:13:51,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 763 to 759. [2022-01-10 07:13:51,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 759 states, 758 states have (on average 1.4313984168865435) internal successors, (1085), 758 states have internal predecessors, (1085), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:13:51,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 759 states to 759 states and 1085 transitions. [2022-01-10 07:13:51,125 INFO L78 Accepts]: Start accepts. Automaton has 759 states and 1085 transitions. Word has length 61 [2022-01-10 07:13:51,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 07:13:51,125 INFO L470 AbstractCegarLoop]: Abstraction has 759 states and 1085 transitions. [2022-01-10 07:13:51,125 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 7.25) internal successors, (116), 15 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:13:51,125 INFO L276 IsEmpty]: Start isEmpty. Operand 759 states and 1085 transitions. [2022-01-10 07:13:51,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-01-10 07:13:51,126 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 07:13:51,126 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 07:13:51,137 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 07:13:51,335 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 07:13:51,335 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 07:13:51,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 07:13:51,336 INFO L85 PathProgramCache]: Analyzing trace with hash 2082434500, now seen corresponding path program 1 times [2022-01-10 07:13:51,336 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 07:13:51,336 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [819062322] [2022-01-10 07:13:51,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 07:13:51,336 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 07:13:51,337 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 07:13:51,338 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 07:13:51,340 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 07:13:51,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 07:13:51,406 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-10 07:13:51,407 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 07:13:51,500 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 07:13:51,500 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 07:13:51,500 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 07:13:51,501 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [819062322] [2022-01-10 07:13:51,501 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [819062322] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 07:13:51,501 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 07:13:51,501 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 07:13:51,501 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [78087682] [2022-01-10 07:13:51,501 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 07:13:51,501 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 07:13:51,502 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 07:13:51,502 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 07:13:51,502 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 07:13:51,503 INFO L87 Difference]: Start difference. First operand 759 states and 1085 transitions. Second operand has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:13:51,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 07:13:51,530 INFO L93 Difference]: Finished difference Result 1099 states and 1579 transitions. [2022-01-10 07:13:51,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 07:13:51,530 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 61 [2022-01-10 07:13:51,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 07:13:51,531 INFO L225 Difference]: With dead ends: 1099 [2022-01-10 07:13:51,532 INFO L226 Difference]: Without dead ends: 425 [2022-01-10 07:13:51,534 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 07:13:51,535 INFO L933 BasicCegarLoop]: 98 mSDtfsCounter, 29 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 158 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 07:13:51,535 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 158 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 07:13:51,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 425 states. [2022-01-10 07:13:51,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 425 to 423. [2022-01-10 07:13:51,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 423 states, 422 states have (on average 1.386255924170616) internal successors, (585), 422 states have internal predecessors, (585), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:13:51,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 423 states to 423 states and 585 transitions. [2022-01-10 07:13:51,561 INFO L78 Accepts]: Start accepts. Automaton has 423 states and 585 transitions. Word has length 61 [2022-01-10 07:13:51,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 07:13:51,563 INFO L470 AbstractCegarLoop]: Abstraction has 423 states and 585 transitions. [2022-01-10 07:13:51,563 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:13:51,563 INFO L276 IsEmpty]: Start isEmpty. Operand 423 states and 585 transitions. [2022-01-10 07:13:51,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-01-10 07:13:51,564 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 07:13:51,564 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 07:13:51,573 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 07:13:51,773 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 07:13:51,773 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 07:13:51,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 07:13:51,773 INFO L85 PathProgramCache]: Analyzing trace with hash 966626727, now seen corresponding path program 1 times [2022-01-10 07:13:51,774 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 07:13:51,774 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1054335919] [2022-01-10 07:13:51,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 07:13:51,774 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 07:13:51,774 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 07:13:51,775 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 07:13:51,775 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 07:13:51,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 07:13:51,838 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-10 07:13:51,839 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 07:13:51,912 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-10 07:13:51,912 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 07:13:51,912 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 07:13:51,912 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1054335919] [2022-01-10 07:13:51,912 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1054335919] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 07:13:51,912 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 07:13:51,912 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 07:13:51,912 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [924289448] [2022-01-10 07:13:51,912 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 07:13:51,913 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 07:13:51,913 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 07:13:51,913 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 07:13:51,913 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 07:13:51,913 INFO L87 Difference]: Start difference. First operand 423 states and 585 transitions. Second operand has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:13:51,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 07:13:51,973 INFO L93 Difference]: Finished difference Result 768 states and 1079 transitions. [2022-01-10 07:13:51,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 07:13:51,973 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 61 [2022-01-10 07:13:51,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 07:13:51,975 INFO L225 Difference]: With dead ends: 768 [2022-01-10 07:13:51,975 INFO L226 Difference]: Without dead ends: 423 [2022-01-10 07:13:51,976 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 07:13:51,977 INFO L933 BasicCegarLoop]: 57 mSDtfsCounter, 46 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 07:13:51,977 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [46 Valid, 74 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 07:13:51,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 423 states. [2022-01-10 07:13:51,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 423 to 423. [2022-01-10 07:13:51,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 423 states, 422 states have (on average 1.367298578199052) internal successors, (577), 422 states have internal predecessors, (577), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:13:51,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 423 states to 423 states and 577 transitions. [2022-01-10 07:13:51,997 INFO L78 Accepts]: Start accepts. Automaton has 423 states and 577 transitions. Word has length 61 [2022-01-10 07:13:51,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 07:13:51,997 INFO L470 AbstractCegarLoop]: Abstraction has 423 states and 577 transitions. [2022-01-10 07:13:51,997 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:13:51,997 INFO L276 IsEmpty]: Start isEmpty. Operand 423 states and 577 transitions. [2022-01-10 07:13:51,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-01-10 07:13:51,998 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 07:13:51,998 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 07:13:52,013 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 07:13:52,213 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 07:13:52,214 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 07:13:52,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 07:13:52,214 INFO L85 PathProgramCache]: Analyzing trace with hash -711386898, now seen corresponding path program 1 times [2022-01-10 07:13:52,215 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 07:13:52,215 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1135552226] [2022-01-10 07:13:52,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 07:13:52,215 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 07:13:52,215 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 07:13:52,216 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 07:13:52,217 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 07:13:52,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 07:13:52,277 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-10 07:13:52,278 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 07:13:52,348 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-01-10 07:13:52,348 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 07:13:52,348 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 07:13:52,349 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1135552226] [2022-01-10 07:13:52,349 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1135552226] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 07:13:52,349 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 07:13:52,349 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 07:13:52,349 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1104310799] [2022-01-10 07:13:52,349 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 07:13:52,350 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 07:13:52,350 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 07:13:52,350 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 07:13:52,350 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 07:13:52,350 INFO L87 Difference]: Start difference. First operand 423 states and 577 transitions. Second operand has 3 states, 3 states have (on average 19.0) internal successors, (57), 3 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:13:52,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 07:13:52,401 INFO L93 Difference]: Finished difference Result 761 states and 1058 transitions. [2022-01-10 07:13:52,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 07:13:52,401 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 19.0) internal successors, (57), 3 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 61 [2022-01-10 07:13:52,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 07:13:52,403 INFO L225 Difference]: With dead ends: 761 [2022-01-10 07:13:52,403 INFO L226 Difference]: Without dead ends: 404 [2022-01-10 07:13:52,404 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 07:13:52,405 INFO L933 BasicCegarLoop]: 67 mSDtfsCounter, 49 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 07:13:52,405 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [49 Valid, 95 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 07:13:52,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 404 states. [2022-01-10 07:13:52,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 404 to 404. [2022-01-10 07:13:52,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 404 states, 403 states have (on average 1.3622828784119108) internal successors, (549), 403 states have internal predecessors, (549), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:13:52,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 404 states to 404 states and 549 transitions. [2022-01-10 07:13:52,427 INFO L78 Accepts]: Start accepts. Automaton has 404 states and 549 transitions. Word has length 61 [2022-01-10 07:13:52,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 07:13:52,427 INFO L470 AbstractCegarLoop]: Abstraction has 404 states and 549 transitions. [2022-01-10 07:13:52,427 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.0) internal successors, (57), 3 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:13:52,429 INFO L276 IsEmpty]: Start isEmpty. Operand 404 states and 549 transitions. [2022-01-10 07:13:52,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-01-10 07:13:52,429 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 07:13:52,430 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 07:13:52,441 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2022-01-10 07:13:52,639 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 07:13:52,639 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 07:13:52,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 07:13:52,640 INFO L85 PathProgramCache]: Analyzing trace with hash -998035781, now seen corresponding path program 1 times [2022-01-10 07:13:52,640 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 07:13:52,640 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [204020733] [2022-01-10 07:13:52,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 07:13:52,640 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 07:13:52,640 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 07:13:52,641 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 07:13:52,643 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2022-01-10 07:13:52,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 07:13:52,708 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-10 07:13:52,709 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 07:13:52,962 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-10 07:13:52,962 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 07:13:52,962 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 07:13:52,962 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [204020733] [2022-01-10 07:13:52,962 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [204020733] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 07:13:52,962 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 07:13:52,962 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-10 07:13:52,962 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [234089026] [2022-01-10 07:13:52,962 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 07:13:52,963 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 07:13:52,963 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 07:13:52,963 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 07:13:52,963 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-01-10 07:13:52,963 INFO L87 Difference]: Start difference. First operand 404 states and 549 transitions. Second operand has 5 states, 5 states have (on average 12.0) internal successors, (60), 5 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:13:53,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 07:13:53,039 INFO L93 Difference]: Finished difference Result 864 states and 1194 transitions. [2022-01-10 07:13:53,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-10 07:13:53,040 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 12.0) internal successors, (60), 5 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 62 [2022-01-10 07:13:53,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 07:13:53,042 INFO L225 Difference]: With dead ends: 864 [2022-01-10 07:13:53,042 INFO L226 Difference]: Without dead ends: 750 [2022-01-10 07:13:53,043 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-01-10 07:13:53,043 INFO L933 BasicCegarLoop]: 136 mSDtfsCounter, 173 mSDsluCounter, 202 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 173 SdHoareTripleChecker+Valid, 338 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 07:13:53,044 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [173 Valid, 338 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-10 07:13:53,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 750 states. [2022-01-10 07:13:53,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 750 to 632. [2022-01-10 07:13:53,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 632 states, 631 states have (on average 1.3534072900158478) internal successors, (854), 631 states have internal predecessors, (854), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:13:53,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 632 states to 632 states and 854 transitions. [2022-01-10 07:13:53,085 INFO L78 Accepts]: Start accepts. Automaton has 632 states and 854 transitions. Word has length 62 [2022-01-10 07:13:53,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 07:13:53,086 INFO L470 AbstractCegarLoop]: Abstraction has 632 states and 854 transitions. [2022-01-10 07:13:53,086 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.0) internal successors, (60), 5 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:13:53,086 INFO L276 IsEmpty]: Start isEmpty. Operand 632 states and 854 transitions. [2022-01-10 07:13:53,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-01-10 07:13:53,086 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 07:13:53,087 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 07:13:53,096 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2022-01-10 07:13:53,296 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 07:13:53,296 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 07:13:53,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 07:13:53,296 INFO L85 PathProgramCache]: Analyzing trace with hash 2018077342, now seen corresponding path program 1 times [2022-01-10 07:13:53,297 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 07:13:53,297 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1712598774] [2022-01-10 07:13:53,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 07:13:53,297 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 07:13:53,297 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 07:13:53,298 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 07:13:53,301 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2022-01-10 07:13:53,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 07:13:53,359 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-10 07:13:53,360 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 07:13:53,595 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-10 07:13:53,595 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 07:13:53,595 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 07:13:53,595 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1712598774] [2022-01-10 07:13:53,595 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1712598774] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 07:13:53,595 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 07:13:53,596 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-10 07:13:53,596 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [424510067] [2022-01-10 07:13:53,596 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 07:13:53,596 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 07:13:53,596 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 07:13:53,596 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 07:13:53,596 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-01-10 07:13:53,597 INFO L87 Difference]: Start difference. First operand 632 states and 854 transitions. Second operand has 5 states, 5 states have (on average 11.8) internal successors, (59), 5 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:13:53,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 07:13:53,667 INFO L93 Difference]: Finished difference Result 976 states and 1344 transitions. [2022-01-10 07:13:53,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-10 07:13:53,668 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 11.8) internal successors, (59), 5 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 62 [2022-01-10 07:13:53,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 07:13:53,670 INFO L225 Difference]: With dead ends: 976 [2022-01-10 07:13:53,670 INFO L226 Difference]: Without dead ends: 638 [2022-01-10 07:13:53,671 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-01-10 07:13:53,671 INFO L933 BasicCegarLoop]: 143 mSDtfsCounter, 196 mSDsluCounter, 170 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 196 SdHoareTripleChecker+Valid, 313 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 07:13:53,671 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [196 Valid, 313 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 07:13:53,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 638 states. [2022-01-10 07:13:53,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 638 to 520. [2022-01-10 07:13:53,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 520 states, 519 states have (on average 1.3333333333333333) internal successors, (692), 519 states have internal predecessors, (692), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:13:53,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 520 states to 520 states and 692 transitions. [2022-01-10 07:13:53,700 INFO L78 Accepts]: Start accepts. Automaton has 520 states and 692 transitions. Word has length 62 [2022-01-10 07:13:53,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 07:13:53,700 INFO L470 AbstractCegarLoop]: Abstraction has 520 states and 692 transitions. [2022-01-10 07:13:53,700 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.8) internal successors, (59), 5 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:13:53,700 INFO L276 IsEmpty]: Start isEmpty. Operand 520 states and 692 transitions. [2022-01-10 07:13:53,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-01-10 07:13:53,701 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 07:13:53,701 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 07:13:53,711 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2022-01-10 07:13:53,910 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 07:13:53,910 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 07:13:53,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 07:13:53,911 INFO L85 PathProgramCache]: Analyzing trace with hash 1984788030, now seen corresponding path program 1 times [2022-01-10 07:13:53,911 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 07:13:53,911 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [536868213] [2022-01-10 07:13:53,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 07:13:53,911 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 07:13:53,911 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 07:13:53,912 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 07:13:53,914 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2022-01-10 07:13:53,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 07:13:53,974 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-10 07:13:53,975 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 07:13:54,208 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-10 07:13:54,208 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 07:13:54,208 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 07:13:54,209 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [536868213] [2022-01-10 07:13:54,209 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [536868213] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 07:13:54,209 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 07:13:54,209 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-10 07:13:54,209 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [508770090] [2022-01-10 07:13:54,209 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 07:13:54,209 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 07:13:54,209 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 07:13:54,209 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 07:13:54,209 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-01-10 07:13:54,210 INFO L87 Difference]: Start difference. First operand 520 states and 692 transitions. Second operand has 5 states, 5 states have (on average 12.2) internal successors, (61), 5 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:13:54,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 07:13:54,288 INFO L93 Difference]: Finished difference Result 868 states and 1187 transitions. [2022-01-10 07:13:54,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-10 07:13:54,289 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 12.2) internal successors, (61), 5 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 62 [2022-01-10 07:13:54,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 07:13:54,291 INFO L225 Difference]: With dead ends: 868 [2022-01-10 07:13:54,291 INFO L226 Difference]: Without dead ends: 754 [2022-01-10 07:13:54,292 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-01-10 07:13:54,292 INFO L933 BasicCegarLoop]: 142 mSDtfsCounter, 192 mSDsluCounter, 171 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 192 SdHoareTripleChecker+Valid, 313 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 07:13:54,293 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [192 Valid, 313 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 07:13:54,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 754 states. [2022-01-10 07:13:54,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 754 to 636. [2022-01-10 07:13:54,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 636 states, 635 states have (on average 1.3338582677165354) internal successors, (847), 635 states have internal predecessors, (847), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:13:54,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 636 states to 636 states and 847 transitions. [2022-01-10 07:13:54,326 INFO L78 Accepts]: Start accepts. Automaton has 636 states and 847 transitions. Word has length 62 [2022-01-10 07:13:54,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 07:13:54,327 INFO L470 AbstractCegarLoop]: Abstraction has 636 states and 847 transitions. [2022-01-10 07:13:54,327 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.2) internal successors, (61), 5 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:13:54,327 INFO L276 IsEmpty]: Start isEmpty. Operand 636 states and 847 transitions. [2022-01-10 07:13:54,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-01-10 07:13:54,327 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 07:13:54,327 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 07:13:54,337 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2022-01-10 07:13:54,537 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 07:13:54,537 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 07:13:54,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 07:13:54,537 INFO L85 PathProgramCache]: Analyzing trace with hash 392958652, now seen corresponding path program 1 times [2022-01-10 07:13:54,537 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 07:13:54,538 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1084898099] [2022-01-10 07:13:54,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 07:13:54,538 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 07:13:54,538 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 07:13:54,539 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 07:13:54,540 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2022-01-10 07:13:54,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 07:13:54,598 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 24 conjunts are in the unsatisfiable core [2022-01-10 07:13:54,600 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 07:13:56,371 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 07:13:56,371 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 07:13:57,438 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 07:13:57,438 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 07:13:57,438 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1084898099] [2022-01-10 07:13:57,438 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1084898099] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 07:13:57,438 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 07:13:57,438 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 39 [2022-01-10 07:13:57,438 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1086801635] [2022-01-10 07:13:57,439 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 07:13:57,439 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-01-10 07:13:57,439 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 07:13:57,439 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-01-10 07:13:57,440 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=1249, Unknown=0, NotChecked=0, Total=1482 [2022-01-10 07:13:57,440 INFO L87 Difference]: Start difference. First operand 636 states and 847 transitions. Second operand has 39 states, 39 states have (on average 3.0) internal successors, (117), 39 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:13:57,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 07:13:57,991 INFO L93 Difference]: Finished difference Result 1071 states and 1417 transitions. [2022-01-10 07:13:57,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-01-10 07:13:57,992 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 3.0) internal successors, (117), 39 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2022-01-10 07:13:57,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 07:13:57,994 INFO L225 Difference]: With dead ends: 1071 [2022-01-10 07:13:57,994 INFO L226 Difference]: Without dead ends: 841 [2022-01-10 07:13:57,995 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 515 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=303, Invalid=1419, Unknown=0, NotChecked=0, Total=1722 [2022-01-10 07:13:57,995 INFO L933 BasicCegarLoop]: 76 mSDtfsCounter, 182 mSDsluCounter, 924 mSDsCounter, 0 mSdLazyCounter, 291 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 182 SdHoareTripleChecker+Valid, 1000 SdHoareTripleChecker+Invalid, 447 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 291 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 135 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-10 07:13:57,995 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [182 Valid, 1000 Invalid, 447 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 291 Invalid, 0 Unknown, 135 Unchecked, 0.3s Time] [2022-01-10 07:13:57,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 841 states. [2022-01-10 07:13:58,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 841 to 642. [2022-01-10 07:13:58,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 642 states, 641 states have (on average 1.3322932917316692) internal successors, (854), 641 states have internal predecessors, (854), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:13:58,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 642 states to 642 states and 854 transitions. [2022-01-10 07:13:58,035 INFO L78 Accepts]: Start accepts. Automaton has 642 states and 854 transitions. Word has length 63 [2022-01-10 07:13:58,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 07:13:58,035 INFO L470 AbstractCegarLoop]: Abstraction has 642 states and 854 transitions. [2022-01-10 07:13:58,035 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 3.0) internal successors, (117), 39 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:13:58,035 INFO L276 IsEmpty]: Start isEmpty. Operand 642 states and 854 transitions. [2022-01-10 07:13:58,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-01-10 07:13:58,036 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 07:13:58,036 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 07:13:58,047 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2022-01-10 07:13:58,244 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 07:13:58,245 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 07:13:58,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 07:13:58,245 INFO L85 PathProgramCache]: Analyzing trace with hash -349929546, now seen corresponding path program 1 times [2022-01-10 07:13:58,245 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 07:13:58,246 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1239043663] [2022-01-10 07:13:58,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 07:13:58,246 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 07:13:58,246 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 07:13:58,247 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 07:13:58,247 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2022-01-10 07:13:58,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 07:13:58,321 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 24 conjunts are in the unsatisfiable core [2022-01-10 07:13:58,322 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 07:13:59,822 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 07:13:59,822 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 07:14:00,587 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 07:14:00,587 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 07:14:00,587 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1239043663] [2022-01-10 07:14:00,587 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1239043663] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 07:14:00,588 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 07:14:00,588 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 35 [2022-01-10 07:14:00,588 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [441544849] [2022-01-10 07:14:00,588 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 07:14:00,588 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-01-10 07:14:00,588 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 07:14:00,588 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-01-10 07:14:00,589 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=205, Invalid=985, Unknown=0, NotChecked=0, Total=1190 [2022-01-10 07:14:00,589 INFO L87 Difference]: Start difference. First operand 642 states and 854 transitions. Second operand has 35 states, 35 states have (on average 3.342857142857143) internal successors, (117), 35 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:14:00,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 07:14:00,986 INFO L93 Difference]: Finished difference Result 943 states and 1252 transitions. [2022-01-10 07:14:00,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-01-10 07:14:00,988 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 3.342857142857143) internal successors, (117), 35 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2022-01-10 07:14:00,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 07:14:00,990 INFO L225 Difference]: With dead ends: 943 [2022-01-10 07:14:00,990 INFO L226 Difference]: Without dead ends: 703 [2022-01-10 07:14:00,991 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 401 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=264, Invalid=1142, Unknown=0, NotChecked=0, Total=1406 [2022-01-10 07:14:00,991 INFO L933 BasicCegarLoop]: 62 mSDtfsCounter, 121 mSDsluCounter, 647 mSDsCounter, 0 mSdLazyCounter, 265 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 121 SdHoareTripleChecker+Valid, 709 SdHoareTripleChecker+Invalid, 331 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 265 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 53 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-10 07:14:00,991 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [121 Valid, 709 Invalid, 331 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 265 Invalid, 0 Unknown, 53 Unchecked, 0.2s Time] [2022-01-10 07:14:00,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 703 states. [2022-01-10 07:14:01,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 703 to 628. [2022-01-10 07:14:01,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 628 states, 627 states have (on average 1.331738437001595) internal successors, (835), 627 states have internal predecessors, (835), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:14:01,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 628 states to 628 states and 835 transitions. [2022-01-10 07:14:01,027 INFO L78 Accepts]: Start accepts. Automaton has 628 states and 835 transitions. Word has length 63 [2022-01-10 07:14:01,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 07:14:01,027 INFO L470 AbstractCegarLoop]: Abstraction has 628 states and 835 transitions. [2022-01-10 07:14:01,027 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 3.342857142857143) internal successors, (117), 35 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:14:01,027 INFO L276 IsEmpty]: Start isEmpty. Operand 628 states and 835 transitions. [2022-01-10 07:14:01,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-01-10 07:14:01,028 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 07:14:01,028 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 07:14:01,036 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (23)] Ended with exit code 0 [2022-01-10 07:14:01,235 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 07:14:01,235 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 07:14:01,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 07:14:01,236 INFO L85 PathProgramCache]: Analyzing trace with hash 1441254617, now seen corresponding path program 1 times [2022-01-10 07:14:01,236 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 07:14:01,236 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [758803067] [2022-01-10 07:14:01,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 07:14:01,236 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 07:14:01,236 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 07:14:01,237 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 07:14:01,238 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2022-01-10 07:14:01,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 07:14:01,296 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 22 conjunts are in the unsatisfiable core [2022-01-10 07:14:01,297 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 07:14:03,665 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 07:14:03,666 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 07:14:05,305 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 07:14:05,305 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 07:14:05,306 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [758803067] [2022-01-10 07:14:05,306 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [758803067] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 07:14:05,306 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 07:14:05,306 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 18] total 37 [2022-01-10 07:14:05,306 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [234924656] [2022-01-10 07:14:05,306 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 07:14:05,306 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-01-10 07:14:05,306 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 07:14:05,307 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-01-10 07:14:05,307 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=1161, Unknown=0, NotChecked=0, Total=1332 [2022-01-10 07:14:05,307 INFO L87 Difference]: Start difference. First operand 628 states and 835 transitions. Second operand has 37 states, 37 states have (on average 3.1621621621621623) internal successors, (117), 37 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:14:05,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 07:14:05,628 INFO L93 Difference]: Finished difference Result 865 states and 1163 transitions. [2022-01-10 07:14:05,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-01-10 07:14:05,628 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 3.1621621621621623) internal successors, (117), 37 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 64 [2022-01-10 07:14:05,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 07:14:05,630 INFO L225 Difference]: With dead ends: 865 [2022-01-10 07:14:05,630 INFO L226 Difference]: Without dead ends: 639 [2022-01-10 07:14:05,631 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 425 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=201, Invalid=1281, Unknown=0, NotChecked=0, Total=1482 [2022-01-10 07:14:05,632 INFO L933 BasicCegarLoop]: 57 mSDtfsCounter, 133 mSDsluCounter, 772 mSDsCounter, 0 mSdLazyCounter, 138 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 133 SdHoareTripleChecker+Valid, 829 SdHoareTripleChecker+Invalid, 251 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 138 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 108 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 07:14:05,632 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [133 Valid, 829 Invalid, 251 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 138 Invalid, 0 Unknown, 108 Unchecked, 0.1s Time] [2022-01-10 07:14:05,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 639 states. [2022-01-10 07:14:05,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 639 to 634. [2022-01-10 07:14:05,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 634 states, 633 states have (on average 1.3317535545023698) internal successors, (843), 633 states have internal predecessors, (843), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:14:05,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 634 states to 634 states and 843 transitions. [2022-01-10 07:14:05,663 INFO L78 Accepts]: Start accepts. Automaton has 634 states and 843 transitions. Word has length 64 [2022-01-10 07:14:05,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 07:14:05,663 INFO L470 AbstractCegarLoop]: Abstraction has 634 states and 843 transitions. [2022-01-10 07:14:05,663 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 3.1621621621621623) internal successors, (117), 37 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:14:05,663 INFO L276 IsEmpty]: Start isEmpty. Operand 634 states and 843 transitions. [2022-01-10 07:14:05,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-01-10 07:14:05,664 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 07:14:05,664 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 07:14:05,672 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (24)] Ended with exit code 0 [2022-01-10 07:14:05,872 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 07:14:05,873 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 07:14:05,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 07:14:05,873 INFO L85 PathProgramCache]: Analyzing trace with hash 1444428534, now seen corresponding path program 1 times [2022-01-10 07:14:05,873 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 07:14:05,874 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [458705895] [2022-01-10 07:14:05,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 07:14:05,874 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 07:14:05,874 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 07:14:05,875 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 07:14:05,877 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2022-01-10 07:14:05,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 07:14:05,933 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 3 conjunts are in the unsatisfiable core [2022-01-10 07:14:05,934 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 07:14:06,090 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-10 07:14:06,090 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 07:14:06,214 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-10 07:14:06,214 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 07:14:06,215 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [458705895] [2022-01-10 07:14:06,215 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [458705895] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 07:14:06,215 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 07:14:06,215 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2022-01-10 07:14:06,215 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1475396926] [2022-01-10 07:14:06,215 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 07:14:06,215 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-10 07:14:06,215 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 07:14:06,216 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-10 07:14:06,216 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-01-10 07:14:06,216 INFO L87 Difference]: Start difference. First operand 634 states and 843 transitions. Second operand has 6 states, 6 states have (on average 19.833333333333332) internal successors, (119), 6 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:14:06,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 07:14:06,298 INFO L93 Difference]: Finished difference Result 1706 states and 2295 transitions. [2022-01-10 07:14:06,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-10 07:14:06,299 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 19.833333333333332) internal successors, (119), 6 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 64 [2022-01-10 07:14:06,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 07:14:06,301 INFO L225 Difference]: With dead ends: 1706 [2022-01-10 07:14:06,301 INFO L226 Difference]: Without dead ends: 1144 [2022-01-10 07:14:06,302 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-01-10 07:14:06,302 INFO L933 BasicCegarLoop]: 98 mSDtfsCounter, 129 mSDsluCounter, 305 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 129 SdHoareTripleChecker+Valid, 403 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 14 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 07:14:06,302 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [129 Valid, 403 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 12 Invalid, 0 Unknown, 14 Unchecked, 0.0s Time] [2022-01-10 07:14:06,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1144 states. [2022-01-10 07:14:06,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1144 to 1126. [2022-01-10 07:14:06,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1126 states, 1125 states have (on average 1.3288888888888888) internal successors, (1495), 1125 states have internal predecessors, (1495), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:14:06,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1126 states to 1126 states and 1495 transitions. [2022-01-10 07:14:06,369 INFO L78 Accepts]: Start accepts. Automaton has 1126 states and 1495 transitions. Word has length 64 [2022-01-10 07:14:06,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 07:14:06,369 INFO L470 AbstractCegarLoop]: Abstraction has 1126 states and 1495 transitions. [2022-01-10 07:14:06,370 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.833333333333332) internal successors, (119), 6 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:14:06,370 INFO L276 IsEmpty]: Start isEmpty. Operand 1126 states and 1495 transitions. [2022-01-10 07:14:06,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-01-10 07:14:06,370 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 07:14:06,370 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 07:14:06,393 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (25)] Forceful destruction successful, exit code 0 [2022-01-10 07:14:06,579 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 07:14:06,579 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 07:14:06,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 07:14:06,580 INFO L85 PathProgramCache]: Analyzing trace with hash 1615439011, now seen corresponding path program 1 times [2022-01-10 07:14:06,580 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 07:14:06,580 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1746609503] [2022-01-10 07:14:06,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 07:14:06,580 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 07:14:06,580 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 07:14:06,581 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 07:14:06,582 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2022-01-10 07:14:06,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 07:14:06,643 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-10 07:14:06,644 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 07:14:08,463 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 07:14:08,464 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 07:14:09,767 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 07:14:09,767 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 07:14:09,768 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1746609503] [2022-01-10 07:14:09,768 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1746609503] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 07:14:09,768 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 07:14:09,768 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21] total 41 [2022-01-10 07:14:09,768 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [272281469] [2022-01-10 07:14:09,768 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 07:14:09,768 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-01-10 07:14:09,768 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 07:14:09,769 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-01-10 07:14:09,769 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=1387, Unknown=0, NotChecked=0, Total=1640 [2022-01-10 07:14:09,770 INFO L87 Difference]: Start difference. First operand 1126 states and 1495 transitions. Second operand has 41 states, 41 states have (on average 2.902439024390244) internal successors, (119), 41 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:14:10,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 07:14:10,088 INFO L93 Difference]: Finished difference Result 1797 states and 2354 transitions. [2022-01-10 07:14:10,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-01-10 07:14:10,088 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.902439024390244) internal successors, (119), 41 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 64 [2022-01-10 07:14:10,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 07:14:10,092 INFO L225 Difference]: With dead ends: 1797 [2022-01-10 07:14:10,092 INFO L226 Difference]: Without dead ends: 1300 [2022-01-10 07:14:10,093 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 588 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=253, Invalid=1387, Unknown=0, NotChecked=0, Total=1640 [2022-01-10 07:14:10,093 INFO L933 BasicCegarLoop]: 90 mSDtfsCounter, 154 mSDsluCounter, 1157 mSDsCounter, 0 mSdLazyCounter, 309 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 154 SdHoareTripleChecker+Valid, 1247 SdHoareTripleChecker+Invalid, 455 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 309 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 136 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-10 07:14:10,093 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [154 Valid, 1247 Invalid, 455 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 309 Invalid, 0 Unknown, 136 Unchecked, 0.3s Time] [2022-01-10 07:14:10,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1300 states. [2022-01-10 07:14:10,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1300 to 952. [2022-01-10 07:14:10,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 952 states, 951 states have (on average 1.3259726603575184) internal successors, (1261), 951 states have internal predecessors, (1261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:14:10,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 952 states to 952 states and 1261 transitions. [2022-01-10 07:14:10,166 INFO L78 Accepts]: Start accepts. Automaton has 952 states and 1261 transitions. Word has length 64 [2022-01-10 07:14:10,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 07:14:10,166 INFO L470 AbstractCegarLoop]: Abstraction has 952 states and 1261 transitions. [2022-01-10 07:14:10,166 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 2.902439024390244) internal successors, (119), 41 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:14:10,166 INFO L276 IsEmpty]: Start isEmpty. Operand 952 states and 1261 transitions. [2022-01-10 07:14:10,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-01-10 07:14:10,167 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 07:14:10,167 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 07:14:10,176 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (26)] Forceful destruction successful, exit code 0 [2022-01-10 07:14:10,375 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 07:14:10,376 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 07:14:10,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 07:14:10,376 INFO L85 PathProgramCache]: Analyzing trace with hash 1790425593, now seen corresponding path program 1 times [2022-01-10 07:14:10,376 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 07:14:10,377 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [49565201] [2022-01-10 07:14:10,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 07:14:10,377 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 07:14:10,377 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 07:14:10,378 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 07:14:10,379 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2022-01-10 07:14:10,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 07:14:10,440 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 9 conjunts are in the unsatisfiable core [2022-01-10 07:14:10,441 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 07:14:11,277 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 07:14:11,277 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 07:14:11,490 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 07:14:11,491 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 07:14:11,491 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [49565201] [2022-01-10 07:14:11,491 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [49565201] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 07:14:11,491 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 07:14:11,491 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 17 [2022-01-10 07:14:11,491 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [610377571] [2022-01-10 07:14:11,491 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 07:14:11,491 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-10 07:14:11,491 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 07:14:11,492 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-10 07:14:11,492 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2022-01-10 07:14:11,492 INFO L87 Difference]: Start difference. First operand 952 states and 1261 transitions. Second operand has 17 states, 17 states have (on average 6.764705882352941) internal successors, (115), 17 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:14:11,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 07:14:11,614 INFO L93 Difference]: Finished difference Result 1252 states and 1669 transitions. [2022-01-10 07:14:11,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-10 07:14:11,615 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 6.764705882352941) internal successors, (115), 17 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2022-01-10 07:14:11,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 07:14:11,617 INFO L225 Difference]: With dead ends: 1252 [2022-01-10 07:14:11,617 INFO L226 Difference]: Without dead ends: 898 [2022-01-10 07:14:11,618 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 113 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2022-01-10 07:14:11,618 INFO L933 BasicCegarLoop]: 72 mSDtfsCounter, 45 mSDsluCounter, 608 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 680 SdHoareTripleChecker+Invalid, 105 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 36 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 07:14:11,619 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 680 Invalid, 105 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 66 Invalid, 0 Unknown, 36 Unchecked, 0.1s Time] [2022-01-10 07:14:11,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 898 states. [2022-01-10 07:14:11,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 898 to 887. [2022-01-10 07:14:11,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 887 states, 886 states have (on average 1.3239277652370203) internal successors, (1173), 886 states have internal predecessors, (1173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:14:11,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 887 states to 887 states and 1173 transitions. [2022-01-10 07:14:11,669 INFO L78 Accepts]: Start accepts. Automaton has 887 states and 1173 transitions. Word has length 65 [2022-01-10 07:14:11,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 07:14:11,669 INFO L470 AbstractCegarLoop]: Abstraction has 887 states and 1173 transitions. [2022-01-10 07:14:11,669 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 6.764705882352941) internal successors, (115), 17 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:14:11,669 INFO L276 IsEmpty]: Start isEmpty. Operand 887 states and 1173 transitions. [2022-01-10 07:14:11,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-01-10 07:14:11,670 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 07:14:11,670 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 07:14:11,679 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (27)] Forceful destruction successful, exit code 0 [2022-01-10 07:14:11,879 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 07:14:11,879 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 07:14:11,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 07:14:11,880 INFO L85 PathProgramCache]: Analyzing trace with hash 159944273, now seen corresponding path program 1 times [2022-01-10 07:14:11,880 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 07:14:11,880 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [529669731] [2022-01-10 07:14:11,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 07:14:11,880 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 07:14:11,880 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 07:14:11,881 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 07:14:11,882 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (28)] Waiting until timeout for monitored process [2022-01-10 07:14:11,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 07:14:11,940 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 3 conjunts are in the unsatisfiable core [2022-01-10 07:14:11,941 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 07:14:12,124 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-10 07:14:12,124 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 07:14:12,264 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-10 07:14:12,264 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 07:14:12,264 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [529669731] [2022-01-10 07:14:12,264 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [529669731] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 07:14:12,264 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 07:14:12,264 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2022-01-10 07:14:12,265 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [603839565] [2022-01-10 07:14:12,265 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 07:14:12,265 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-10 07:14:12,265 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 07:14:12,265 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-10 07:14:12,265 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-01-10 07:14:12,266 INFO L87 Difference]: Start difference. First operand 887 states and 1173 transitions. Second operand has 6 states, 6 states have (on average 20.333333333333332) internal successors, (122), 6 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:14:12,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 07:14:12,358 INFO L93 Difference]: Finished difference Result 1910 states and 2528 transitions. [2022-01-10 07:14:12,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-10 07:14:12,358 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 20.333333333333332) internal successors, (122), 6 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2022-01-10 07:14:12,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 07:14:12,362 INFO L225 Difference]: With dead ends: 1910 [2022-01-10 07:14:12,362 INFO L226 Difference]: Without dead ends: 1348 [2022-01-10 07:14:12,362 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 124 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2022-01-10 07:14:12,363 INFO L933 BasicCegarLoop]: 91 mSDtfsCounter, 131 mSDsluCounter, 266 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 131 SdHoareTripleChecker+Valid, 357 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 11 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 07:14:12,363 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [131 Valid, 357 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 19 Invalid, 0 Unknown, 11 Unchecked, 0.0s Time] [2022-01-10 07:14:12,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1348 states. [2022-01-10 07:14:12,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1348 to 1095. [2022-01-10 07:14:12,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1095 states, 1094 states have (on average 1.2961608775137112) internal successors, (1418), 1094 states have internal predecessors, (1418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:14:12,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1095 states to 1095 states and 1418 transitions. [2022-01-10 07:14:12,426 INFO L78 Accepts]: Start accepts. Automaton has 1095 states and 1418 transitions. Word has length 65 [2022-01-10 07:14:12,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 07:14:12,427 INFO L470 AbstractCegarLoop]: Abstraction has 1095 states and 1418 transitions. [2022-01-10 07:14:12,427 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 20.333333333333332) internal successors, (122), 6 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:14:12,427 INFO L276 IsEmpty]: Start isEmpty. Operand 1095 states and 1418 transitions. [2022-01-10 07:14:12,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2022-01-10 07:14:12,427 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 07:14:12,427 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 07:14:12,434 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (28)] Ended with exit code 0 [2022-01-10 07:14:12,628 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 07:14:12,628 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 07:14:12,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 07:14:12,628 INFO L85 PathProgramCache]: Analyzing trace with hash 1789317798, now seen corresponding path program 1 times [2022-01-10 07:14:12,629 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 07:14:12,629 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1762660760] [2022-01-10 07:14:12,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 07:14:12,629 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 07:14:12,629 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 07:14:12,630 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 07:14:12,631 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (29)] Waiting until timeout for monitored process [2022-01-10 07:14:12,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 07:14:12,697 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-10 07:14:12,698 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 07:14:12,793 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 39 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-10 07:14:12,793 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 07:14:12,793 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 07:14:12,793 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1762660760] [2022-01-10 07:14:12,793 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1762660760] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 07:14:12,793 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 07:14:12,793 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 07:14:12,794 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [481504292] [2022-01-10 07:14:12,794 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 07:14:12,794 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 07:14:12,794 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 07:14:12,794 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 07:14:12,794 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 07:14:12,794 INFO L87 Difference]: Start difference. First operand 1095 states and 1418 transitions. Second operand has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:14:12,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 07:14:12,827 INFO L93 Difference]: Finished difference Result 1576 states and 2045 transitions. [2022-01-10 07:14:12,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 07:14:12,827 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 85 [2022-01-10 07:14:12,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 07:14:12,828 INFO L225 Difference]: With dead ends: 1576 [2022-01-10 07:14:12,828 INFO L226 Difference]: Without dead ends: 561 [2022-01-10 07:14:12,829 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 07:14:12,830 INFO L933 BasicCegarLoop]: 83 mSDtfsCounter, 23 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 133 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 07:14:12,830 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 133 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 07:14:12,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 561 states. [2022-01-10 07:14:12,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 561 to 559. [2022-01-10 07:14:12,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 559 states, 558 states have (on average 1.2580645161290323) internal successors, (702), 558 states have internal predecessors, (702), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:14:12,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 559 states to 559 states and 702 transitions. [2022-01-10 07:14:12,857 INFO L78 Accepts]: Start accepts. Automaton has 559 states and 702 transitions. Word has length 85 [2022-01-10 07:14:12,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 07:14:12,857 INFO L470 AbstractCegarLoop]: Abstraction has 559 states and 702 transitions. [2022-01-10 07:14:12,857 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:14:12,857 INFO L276 IsEmpty]: Start isEmpty. Operand 559 states and 702 transitions. [2022-01-10 07:14:12,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2022-01-10 07:14:12,858 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 07:14:12,858 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 07:14:12,867 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (29)] Forceful destruction successful, exit code 0 [2022-01-10 07:14:13,067 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 07:14:13,067 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 07:14:13,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 07:14:13,067 INFO L85 PathProgramCache]: Analyzing trace with hash 463968369, now seen corresponding path program 1 times [2022-01-10 07:14:13,068 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 07:14:13,068 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1958712178] [2022-01-10 07:14:13,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 07:14:13,068 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 07:14:13,068 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 07:14:13,069 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 07:14:13,069 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (30)] Waiting until timeout for monitored process [2022-01-10 07:14:13,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 07:14:13,148 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 9 conjunts are in the unsatisfiable core [2022-01-10 07:14:13,150 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 07:14:14,074 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 20 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 07:14:14,074 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 07:14:14,322 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 20 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 07:14:14,322 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 07:14:14,322 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1958712178] [2022-01-10 07:14:14,322 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1958712178] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 07:14:14,322 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 07:14:14,322 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2022-01-10 07:14:14,322 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [914247140] [2022-01-10 07:14:14,322 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 07:14:14,322 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-10 07:14:14,322 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 07:14:14,323 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-10 07:14:14,323 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2022-01-10 07:14:14,323 INFO L87 Difference]: Start difference. First operand 559 states and 702 transitions. Second operand has 18 states, 18 states have (on average 8.722222222222221) internal successors, (157), 17 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:14:14,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 07:14:14,477 INFO L93 Difference]: Finished difference Result 1091 states and 1379 transitions. [2022-01-10 07:14:14,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-01-10 07:14:14,477 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 8.722222222222221) internal successors, (157), 17 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 86 [2022-01-10 07:14:14,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 07:14:14,478 INFO L225 Difference]: With dead ends: 1091 [2022-01-10 07:14:14,479 INFO L226 Difference]: Without dead ends: 608 [2022-01-10 07:14:14,479 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 154 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=103, Invalid=403, Unknown=0, NotChecked=0, Total=506 [2022-01-10 07:14:14,480 INFO L933 BasicCegarLoop]: 65 mSDtfsCounter, 113 mSDsluCounter, 537 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 113 SdHoareTripleChecker+Valid, 602 SdHoareTripleChecker+Invalid, 124 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 70 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 07:14:14,480 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [113 Valid, 602 Invalid, 124 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 49 Invalid, 0 Unknown, 70 Unchecked, 0.0s Time] [2022-01-10 07:14:14,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 608 states. [2022-01-10 07:14:14,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 608 to 581. [2022-01-10 07:14:14,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 581 states, 580 states have (on average 1.2517241379310344) internal successors, (726), 580 states have internal predecessors, (726), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:14:14,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 581 states to 581 states and 726 transitions. [2022-01-10 07:14:14,521 INFO L78 Accepts]: Start accepts. Automaton has 581 states and 726 transitions. Word has length 86 [2022-01-10 07:14:14,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 07:14:14,521 INFO L470 AbstractCegarLoop]: Abstraction has 581 states and 726 transitions. [2022-01-10 07:14:14,521 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 8.722222222222221) internal successors, (157), 17 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:14:14,521 INFO L276 IsEmpty]: Start isEmpty. Operand 581 states and 726 transitions. [2022-01-10 07:14:14,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2022-01-10 07:14:14,521 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 07:14:14,521 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 07:14:14,528 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (30)] Ended with exit code 0 [2022-01-10 07:14:14,722 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 07:14:14,722 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 07:14:14,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 07:14:14,723 INFO L85 PathProgramCache]: Analyzing trace with hash 1329500758, now seen corresponding path program 2 times [2022-01-10 07:14:14,723 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 07:14:14,723 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [674074736] [2022-01-10 07:14:14,723 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-10 07:14:14,723 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 07:14:14,723 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 07:14:14,724 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 07:14:14,725 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (31)] Waiting until timeout for monitored process [2022-01-10 07:14:14,790 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-10 07:14:14,790 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 07:14:14,793 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 3 conjunts are in the unsatisfiable core [2022-01-10 07:14:14,794 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 07:14:15,024 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 6 proven. 31 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-01-10 07:14:15,024 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 07:14:15,169 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 6 proven. 31 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-01-10 07:14:15,170 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 07:14:15,170 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [674074736] [2022-01-10 07:14:15,170 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [674074736] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 07:14:15,170 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 07:14:15,170 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2022-01-10 07:14:15,170 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2010734358] [2022-01-10 07:14:15,170 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 07:14:15,170 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-10 07:14:15,170 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 07:14:15,170 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-10 07:14:15,170 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-01-10 07:14:15,171 INFO L87 Difference]: Start difference. First operand 581 states and 726 transitions. Second operand has 6 states, 6 states have (on average 25.833333333333332) internal successors, (155), 6 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:14:15,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 07:14:15,213 INFO L93 Difference]: Finished difference Result 1113 states and 1401 transitions. [2022-01-10 07:14:15,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-10 07:14:15,214 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 25.833333333333332) internal successors, (155), 6 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 86 [2022-01-10 07:14:15,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 07:14:15,215 INFO L225 Difference]: With dead ends: 1113 [2022-01-10 07:14:15,215 INFO L226 Difference]: Without dead ends: 643 [2022-01-10 07:14:15,216 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 166 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-01-10 07:14:15,216 INFO L933 BasicCegarLoop]: 96 mSDtfsCounter, 85 mSDsluCounter, 187 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 283 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 7 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 07:14:15,216 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [85 Valid, 283 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 14 Invalid, 0 Unknown, 7 Unchecked, 0.0s Time] [2022-01-10 07:14:15,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 643 states. [2022-01-10 07:14:15,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 643 to 575. [2022-01-10 07:14:15,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 575 states, 574 states have (on average 1.2491289198606272) internal successors, (717), 574 states have internal predecessors, (717), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:14:15,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 575 states to 575 states and 717 transitions. [2022-01-10 07:14:15,246 INFO L78 Accepts]: Start accepts. Automaton has 575 states and 717 transitions. Word has length 86 [2022-01-10 07:14:15,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 07:14:15,246 INFO L470 AbstractCegarLoop]: Abstraction has 575 states and 717 transitions. [2022-01-10 07:14:15,246 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 25.833333333333332) internal successors, (155), 6 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:14:15,246 INFO L276 IsEmpty]: Start isEmpty. Operand 575 states and 717 transitions. [2022-01-10 07:14:15,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2022-01-10 07:14:15,246 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 07:14:15,247 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 07:14:15,255 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (31)] Forceful destruction successful, exit code 0 [2022-01-10 07:14:15,455 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 07:14:15,455 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 07:14:15,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 07:14:15,456 INFO L85 PathProgramCache]: Analyzing trace with hash -1571997298, now seen corresponding path program 1 times [2022-01-10 07:14:15,456 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 07:14:15,456 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [768495629] [2022-01-10 07:14:15,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 07:14:15,456 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 07:14:15,456 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 07:14:15,457 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 07:14:15,458 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (32)] Waiting until timeout for monitored process [2022-01-10 07:14:15,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 07:14:15,533 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 13 conjunts are in the unsatisfiable core [2022-01-10 07:14:15,534 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 07:14:16,732 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 36 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 07:14:16,732 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 07:14:17,133 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 36 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 07:14:17,133 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 07:14:17,133 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [768495629] [2022-01-10 07:14:17,133 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [768495629] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 07:14:17,133 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 07:14:17,133 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 25 [2022-01-10 07:14:17,133 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [979488724] [2022-01-10 07:14:17,133 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 07:14:17,134 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-10 07:14:17,134 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 07:14:17,134 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-10 07:14:17,134 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=567, Unknown=0, NotChecked=0, Total=650 [2022-01-10 07:14:17,134 INFO L87 Difference]: Start difference. First operand 575 states and 717 transitions. Second operand has 26 states, 26 states have (on average 7.461538461538462) internal successors, (194), 25 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:14:17,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 07:14:17,310 INFO L93 Difference]: Finished difference Result 1059 states and 1328 transitions. [2022-01-10 07:14:17,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-01-10 07:14:17,311 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 7.461538461538462) internal successors, (194), 25 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 106 [2022-01-10 07:14:17,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 07:14:17,313 INFO L225 Difference]: With dead ends: 1059 [2022-01-10 07:14:17,313 INFO L226 Difference]: Without dead ends: 624 [2022-01-10 07:14:17,314 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 215 GetRequests, 187 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 202 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=117, Invalid=753, Unknown=0, NotChecked=0, Total=870 [2022-01-10 07:14:17,314 INFO L933 BasicCegarLoop]: 72 mSDtfsCounter, 85 mSDsluCounter, 961 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 1033 SdHoareTripleChecker+Invalid, 174 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 114 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 07:14:17,314 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [85 Valid, 1033 Invalid, 174 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 56 Invalid, 0 Unknown, 114 Unchecked, 0.0s Time] [2022-01-10 07:14:17,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 624 states. [2022-01-10 07:14:17,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 624 to 624. [2022-01-10 07:14:17,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 624 states, 623 states have (on average 1.2359550561797752) internal successors, (770), 623 states have internal predecessors, (770), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:14:17,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 624 states to 624 states and 770 transitions. [2022-01-10 07:14:17,360 INFO L78 Accepts]: Start accepts. Automaton has 624 states and 770 transitions. Word has length 106 [2022-01-10 07:14:17,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 07:14:17,360 INFO L470 AbstractCegarLoop]: Abstraction has 624 states and 770 transitions. [2022-01-10 07:14:17,360 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 7.461538461538462) internal successors, (194), 25 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:14:17,360 INFO L276 IsEmpty]: Start isEmpty. Operand 624 states and 770 transitions. [2022-01-10 07:14:17,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2022-01-10 07:14:17,361 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 07:14:17,361 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 07:14:17,371 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (32)] Forceful destruction successful, exit code 0 [2022-01-10 07:14:17,570 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 07:14:17,570 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 07:14:17,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 07:14:17,570 INFO L85 PathProgramCache]: Analyzing trace with hash 1667272311, now seen corresponding path program 1 times [2022-01-10 07:14:17,571 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 07:14:17,571 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1392184468] [2022-01-10 07:14:17,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 07:14:17,571 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 07:14:17,571 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 07:14:17,572 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 07:14:17,572 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (33)] Waiting until timeout for monitored process [2022-01-10 07:14:17,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 07:14:17,649 INFO L263 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 13 conjunts are in the unsatisfiable core [2022-01-10 07:14:17,650 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 07:14:18,844 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 22 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 07:14:18,845 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 07:14:19,296 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 22 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 07:14:19,297 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 07:14:19,297 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1392184468] [2022-01-10 07:14:19,297 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1392184468] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 07:14:19,297 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 07:14:19,297 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 25 [2022-01-10 07:14:19,297 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2050940984] [2022-01-10 07:14:19,297 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 07:14:19,297 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-10 07:14:19,297 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 07:14:19,298 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-10 07:14:19,298 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=567, Unknown=0, NotChecked=0, Total=650 [2022-01-10 07:14:19,298 INFO L87 Difference]: Start difference. First operand 624 states and 770 transitions. Second operand has 26 states, 26 states have (on average 7.6923076923076925) internal successors, (200), 25 states have internal predecessors, (200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:14:19,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 07:14:19,476 INFO L93 Difference]: Finished difference Result 1179 states and 1460 transitions. [2022-01-10 07:14:19,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-01-10 07:14:19,477 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 7.6923076923076925) internal successors, (200), 25 states have internal predecessors, (200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 106 [2022-01-10 07:14:19,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 07:14:19,479 INFO L225 Difference]: With dead ends: 1179 [2022-01-10 07:14:19,479 INFO L226 Difference]: Without dead ends: 750 [2022-01-10 07:14:19,479 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 214 GetRequests, 186 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 201 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=119, Invalid=751, Unknown=0, NotChecked=0, Total=870 [2022-01-10 07:14:19,480 INFO L933 BasicCegarLoop]: 76 mSDtfsCounter, 99 mSDsluCounter, 949 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 1025 SdHoareTripleChecker+Invalid, 188 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 113 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 07:14:19,480 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [99 Valid, 1025 Invalid, 188 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 71 Invalid, 0 Unknown, 113 Unchecked, 0.0s Time] [2022-01-10 07:14:19,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 750 states. [2022-01-10 07:14:19,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 750 to 750. [2022-01-10 07:14:19,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 750 states, 749 states have (on average 1.2149532710280373) internal successors, (910), 749 states have internal predecessors, (910), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:14:19,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 750 states to 750 states and 910 transitions. [2022-01-10 07:14:19,529 INFO L78 Accepts]: Start accepts. Automaton has 750 states and 910 transitions. Word has length 106 [2022-01-10 07:14:19,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 07:14:19,529 INFO L470 AbstractCegarLoop]: Abstraction has 750 states and 910 transitions. [2022-01-10 07:14:19,529 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 7.6923076923076925) internal successors, (200), 25 states have internal predecessors, (200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:14:19,529 INFO L276 IsEmpty]: Start isEmpty. Operand 750 states and 910 transitions. [2022-01-10 07:14:19,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2022-01-10 07:14:19,530 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 07:14:19,530 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 07:14:19,539 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (33)] Ended with exit code 0 [2022-01-10 07:14:19,737 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 07:14:19,738 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 07:14:19,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 07:14:19,738 INFO L85 PathProgramCache]: Analyzing trace with hash -1473748879, now seen corresponding path program 1 times [2022-01-10 07:14:19,738 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 07:14:19,738 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [957258268] [2022-01-10 07:14:19,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 07:14:19,738 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 07:14:19,739 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 07:14:19,739 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 07:14:19,740 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (34)] Waiting until timeout for monitored process [2022-01-10 07:14:19,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 07:14:19,829 INFO L263 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 13 conjunts are in the unsatisfiable core [2022-01-10 07:14:19,831 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 07:14:21,217 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 13 proven. 73 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 07:14:21,218 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 07:14:21,573 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 13 proven. 73 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 07:14:21,573 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 07:14:21,573 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [957258268] [2022-01-10 07:14:21,573 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [957258268] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 07:14:21,573 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 07:14:21,574 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 25 [2022-01-10 07:14:21,574 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1892018835] [2022-01-10 07:14:21,574 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 07:14:21,574 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-10 07:14:21,574 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 07:14:21,574 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-10 07:14:21,574 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=567, Unknown=0, NotChecked=0, Total=650 [2022-01-10 07:14:21,575 INFO L87 Difference]: Start difference. First operand 750 states and 910 transitions. Second operand has 26 states, 26 states have (on average 7.923076923076923) internal successors, (206), 25 states have internal predecessors, (206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:14:21,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 07:14:21,761 INFO L93 Difference]: Finished difference Result 1297 states and 1598 transitions. [2022-01-10 07:14:21,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-01-10 07:14:21,762 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 7.923076923076923) internal successors, (206), 25 states have internal predecessors, (206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 106 [2022-01-10 07:14:21,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 07:14:21,764 INFO L225 Difference]: With dead ends: 1297 [2022-01-10 07:14:21,764 INFO L226 Difference]: Without dead ends: 880 [2022-01-10 07:14:21,765 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 214 GetRequests, 186 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 201 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=121, Invalid=749, Unknown=0, NotChecked=0, Total=870 [2022-01-10 07:14:21,765 INFO L933 BasicCegarLoop]: 79 mSDtfsCounter, 94 mSDsluCounter, 1257 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 1336 SdHoareTripleChecker+Invalid, 189 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 125 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 07:14:21,765 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [94 Valid, 1336 Invalid, 189 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 60 Invalid, 0 Unknown, 125 Unchecked, 0.0s Time] [2022-01-10 07:14:21,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 880 states. [2022-01-10 07:14:21,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 880 to 858. [2022-01-10 07:14:21,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 858 states, 857 states have (on average 1.206534422403734) internal successors, (1034), 857 states have internal predecessors, (1034), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:14:21,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 858 states to 858 states and 1034 transitions. [2022-01-10 07:14:21,826 INFO L78 Accepts]: Start accepts. Automaton has 858 states and 1034 transitions. Word has length 106 [2022-01-10 07:14:21,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 07:14:21,826 INFO L470 AbstractCegarLoop]: Abstraction has 858 states and 1034 transitions. [2022-01-10 07:14:21,826 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 7.923076923076923) internal successors, (206), 25 states have internal predecessors, (206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:14:21,826 INFO L276 IsEmpty]: Start isEmpty. Operand 858 states and 1034 transitions. [2022-01-10 07:14:21,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2022-01-10 07:14:21,827 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 07:14:21,827 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 07:14:21,840 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (34)] Forceful destruction successful, exit code 0 [2022-01-10 07:14:22,036 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 07:14:22,036 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 07:14:22,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 07:14:22,037 INFO L85 PathProgramCache]: Analyzing trace with hash -1940268525, now seen corresponding path program 1 times [2022-01-10 07:14:22,037 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 07:14:22,037 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1128605366] [2022-01-10 07:14:22,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 07:14:22,037 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 07:14:22,037 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 07:14:22,038 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 07:14:22,039 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (35)] Waiting until timeout for monitored process [2022-01-10 07:14:22,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 07:14:22,120 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 9 conjunts are in the unsatisfiable core [2022-01-10 07:14:22,122 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 07:14:23,114 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 52 proven. 32 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-10 07:14:23,114 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 07:14:23,423 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 52 proven. 32 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-10 07:14:23,423 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 07:14:23,423 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1128605366] [2022-01-10 07:14:23,423 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1128605366] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 07:14:23,423 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 07:14:23,423 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2022-01-10 07:14:23,423 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1654974646] [2022-01-10 07:14:23,423 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 07:14:23,424 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-10 07:14:23,424 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 07:14:23,424 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-10 07:14:23,424 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2022-01-10 07:14:23,424 INFO L87 Difference]: Start difference. First operand 858 states and 1034 transitions. Second operand has 18 states, 18 states have (on average 9.88888888888889) internal successors, (178), 17 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:14:23,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 07:14:23,594 INFO L93 Difference]: Finished difference Result 1334 states and 1645 transitions. [2022-01-10 07:14:23,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-10 07:14:23,595 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 9.88888888888889) internal successors, (178), 17 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 106 [2022-01-10 07:14:23,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 07:14:23,608 INFO L225 Difference]: With dead ends: 1334 [2022-01-10 07:14:23,608 INFO L226 Difference]: Without dead ends: 863 [2022-01-10 07:14:23,614 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 214 GetRequests, 194 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=91, Invalid=371, Unknown=0, NotChecked=0, Total=462 [2022-01-10 07:14:23,615 INFO L933 BasicCegarLoop]: 68 mSDtfsCounter, 122 mSDsluCounter, 458 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 122 SdHoareTripleChecker+Valid, 526 SdHoareTripleChecker+Invalid, 125 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 78 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 07:14:23,615 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [122 Valid, 526 Invalid, 125 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 43 Invalid, 0 Unknown, 78 Unchecked, 0.0s Time] [2022-01-10 07:14:23,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 863 states. [2022-01-10 07:14:23,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 863 to 863. [2022-01-10 07:14:23,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 863 states, 862 states have (on average 1.2006960556844548) internal successors, (1035), 862 states have internal predecessors, (1035), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:14:23,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 863 states to 863 states and 1035 transitions. [2022-01-10 07:14:23,690 INFO L78 Accepts]: Start accepts. Automaton has 863 states and 1035 transitions. Word has length 106 [2022-01-10 07:14:23,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 07:14:23,690 INFO L470 AbstractCegarLoop]: Abstraction has 863 states and 1035 transitions. [2022-01-10 07:14:23,691 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 9.88888888888889) internal successors, (178), 17 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:14:23,691 INFO L276 IsEmpty]: Start isEmpty. Operand 863 states and 1035 transitions. [2022-01-10 07:14:23,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2022-01-10 07:14:23,692 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 07:14:23,692 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 07:14:23,705 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (35)] Forceful destruction successful, exit code 0 [2022-01-10 07:14:23,901 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 07:14:23,902 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 07:14:23,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 07:14:23,902 INFO L85 PathProgramCache]: Analyzing trace with hash 531538542, now seen corresponding path program 1 times [2022-01-10 07:14:23,902 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 07:14:23,902 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [483603737] [2022-01-10 07:14:23,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 07:14:23,902 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 07:14:23,902 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 07:14:23,903 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 07:14:23,904 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (36)] Waiting until timeout for monitored process [2022-01-10 07:14:24,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 07:14:24,040 INFO L263 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 9 conjunts are in the unsatisfiable core [2022-01-10 07:14:24,042 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 07:14:24,751 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 61 proven. 18 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-01-10 07:14:24,751 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 07:14:25,093 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 61 proven. 18 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-01-10 07:14:25,094 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 07:14:25,094 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [483603737] [2022-01-10 07:14:25,094 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [483603737] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 07:14:25,094 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 07:14:25,094 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2022-01-10 07:14:25,094 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2081291159] [2022-01-10 07:14:25,094 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 07:14:25,094 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-10 07:14:25,094 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 07:14:25,095 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-10 07:14:25,095 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2022-01-10 07:14:25,095 INFO L87 Difference]: Start difference. First operand 863 states and 1035 transitions. Second operand has 18 states, 18 states have (on average 9.222222222222221) internal successors, (166), 17 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:14:25,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 07:14:25,245 INFO L93 Difference]: Finished difference Result 1346 states and 1654 transitions. [2022-01-10 07:14:25,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-10 07:14:25,245 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 9.222222222222221) internal successors, (166), 17 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 106 [2022-01-10 07:14:25,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 07:14:25,247 INFO L225 Difference]: With dead ends: 1346 [2022-01-10 07:14:25,247 INFO L226 Difference]: Without dead ends: 863 [2022-01-10 07:14:25,247 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 214 GetRequests, 194 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=94, Invalid=368, Unknown=0, NotChecked=0, Total=462 [2022-01-10 07:14:25,248 INFO L933 BasicCegarLoop]: 64 mSDtfsCounter, 70 mSDsluCounter, 577 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 641 SdHoareTripleChecker+Invalid, 138 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 73 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 07:14:25,248 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [70 Valid, 641 Invalid, 138 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 60 Invalid, 0 Unknown, 73 Unchecked, 0.0s Time] [2022-01-10 07:14:25,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 863 states. [2022-01-10 07:14:25,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 863 to 863. [2022-01-10 07:14:25,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 863 states, 862 states have (on average 1.1960556844547563) internal successors, (1031), 862 states have internal predecessors, (1031), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:14:25,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 863 states to 863 states and 1031 transitions. [2022-01-10 07:14:25,308 INFO L78 Accepts]: Start accepts. Automaton has 863 states and 1031 transitions. Word has length 106 [2022-01-10 07:14:25,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 07:14:25,308 INFO L470 AbstractCegarLoop]: Abstraction has 863 states and 1031 transitions. [2022-01-10 07:14:25,312 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 9.222222222222221) internal successors, (166), 17 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:14:25,312 INFO L276 IsEmpty]: Start isEmpty. Operand 863 states and 1031 transitions. [2022-01-10 07:14:25,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2022-01-10 07:14:25,313 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 07:14:25,313 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 07:14:25,320 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (36)] Ended with exit code 0 [2022-01-10 07:14:25,513 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 07:14:25,513 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 07:14:25,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 07:14:25,514 INFO L85 PathProgramCache]: Analyzing trace with hash -404838071, now seen corresponding path program 1 times [2022-01-10 07:14:25,514 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 07:14:25,514 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1925151757] [2022-01-10 07:14:25,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 07:14:25,514 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 07:14:25,514 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 07:14:25,515 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 07:14:25,516 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (37)] Waiting until timeout for monitored process [2022-01-10 07:14:25,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 07:14:25,600 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-10 07:14:25,602 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 07:14:26,080 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 57 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-01-10 07:14:26,080 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 07:14:26,080 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 07:14:26,080 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1925151757] [2022-01-10 07:14:26,080 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1925151757] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 07:14:26,080 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 07:14:26,081 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 07:14:26,081 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1368301382] [2022-01-10 07:14:26,081 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 07:14:26,081 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 07:14:26,081 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 07:14:26,081 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 07:14:26,081 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-10 07:14:26,082 INFO L87 Difference]: Start difference. First operand 863 states and 1031 transitions. Second operand has 5 states, 5 states have (on average 17.0) internal successors, (85), 4 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:14:26,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 07:14:26,196 INFO L93 Difference]: Finished difference Result 1808 states and 2247 transitions. [2022-01-10 07:14:26,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-10 07:14:26,197 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 17.0) internal successors, (85), 4 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 107 [2022-01-10 07:14:26,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 07:14:26,199 INFO L225 Difference]: With dead ends: 1808 [2022-01-10 07:14:26,199 INFO L226 Difference]: Without dead ends: 1326 [2022-01-10 07:14:26,200 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 103 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2022-01-10 07:14:26,201 INFO L933 BasicCegarLoop]: 78 mSDtfsCounter, 66 mSDsluCounter, 84 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 162 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 31 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 07:14:26,201 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [66 Valid, 162 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 10 Invalid, 0 Unknown, 31 Unchecked, 0.0s Time] [2022-01-10 07:14:26,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1326 states. [2022-01-10 07:14:26,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1326 to 1310. [2022-01-10 07:14:26,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1310 states, 1309 states have (on average 1.2230710466004584) internal successors, (1601), 1309 states have internal predecessors, (1601), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:14:26,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1310 states to 1310 states and 1601 transitions. [2022-01-10 07:14:26,281 INFO L78 Accepts]: Start accepts. Automaton has 1310 states and 1601 transitions. Word has length 107 [2022-01-10 07:14:26,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 07:14:26,282 INFO L470 AbstractCegarLoop]: Abstraction has 1310 states and 1601 transitions. [2022-01-10 07:14:26,282 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 17.0) internal successors, (85), 4 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:14:26,282 INFO L276 IsEmpty]: Start isEmpty. Operand 1310 states and 1601 transitions. [2022-01-10 07:14:26,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2022-01-10 07:14:26,283 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 07:14:26,283 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 07:14:26,290 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (37)] Ended with exit code 0 [2022-01-10 07:14:26,483 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 07:14:26,483 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 07:14:26,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 07:14:26,484 INFO L85 PathProgramCache]: Analyzing trace with hash -2048006767, now seen corresponding path program 1 times [2022-01-10 07:14:26,484 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 07:14:26,484 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1165909319] [2022-01-10 07:14:26,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 07:14:26,484 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 07:14:26,484 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 07:14:26,485 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 07:14:26,486 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (38)] Waiting until timeout for monitored process [2022-01-10 07:14:26,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 07:14:26,564 INFO L263 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-10 07:14:26,566 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 07:14:27,381 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 13 proven. 48 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-01-10 07:14:27,381 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 07:14:27,707 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 13 proven. 48 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-01-10 07:14:27,707 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 07:14:27,707 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1165909319] [2022-01-10 07:14:27,707 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1165909319] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 07:14:27,707 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 07:14:27,707 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2022-01-10 07:14:27,707 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [551524209] [2022-01-10 07:14:27,707 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 07:14:27,707 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-10 07:14:27,708 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 07:14:27,708 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-10 07:14:27,708 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2022-01-10 07:14:27,708 INFO L87 Difference]: Start difference. First operand 1310 states and 1601 transitions. Second operand has 16 states, 16 states have (on average 10.75) internal successors, (172), 15 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:14:27,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 07:14:27,972 INFO L93 Difference]: Finished difference Result 2208 states and 2752 transitions. [2022-01-10 07:14:27,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-10 07:14:27,973 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 10.75) internal successors, (172), 15 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 107 [2022-01-10 07:14:27,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 07:14:27,975 INFO L225 Difference]: With dead ends: 2208 [2022-01-10 07:14:27,975 INFO L226 Difference]: Without dead ends: 1791 [2022-01-10 07:14:27,976 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 222 GetRequests, 200 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=119, Invalid=433, Unknown=0, NotChecked=0, Total=552 [2022-01-10 07:14:27,977 INFO L933 BasicCegarLoop]: 84 mSDtfsCounter, 140 mSDsluCounter, 700 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 140 SdHoareTripleChecker+Valid, 784 SdHoareTripleChecker+Invalid, 155 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 90 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 07:14:27,977 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [140 Valid, 784 Invalid, 155 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 61 Invalid, 0 Unknown, 90 Unchecked, 0.0s Time] [2022-01-10 07:14:27,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1791 states. [2022-01-10 07:14:28,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1791 to 1779. [2022-01-10 07:14:28,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1779 states, 1778 states have (on average 1.2300337457817774) internal successors, (2187), 1778 states have internal predecessors, (2187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:14:28,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1779 states to 1779 states and 2187 transitions. [2022-01-10 07:14:28,085 INFO L78 Accepts]: Start accepts. Automaton has 1779 states and 2187 transitions. Word has length 107 [2022-01-10 07:14:28,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 07:14:28,085 INFO L470 AbstractCegarLoop]: Abstraction has 1779 states and 2187 transitions. [2022-01-10 07:14:28,085 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 10.75) internal successors, (172), 15 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:14:28,085 INFO L276 IsEmpty]: Start isEmpty. Operand 1779 states and 2187 transitions. [2022-01-10 07:14:28,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2022-01-10 07:14:28,086 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 07:14:28,086 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 07:14:28,093 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (38)] Ended with exit code 0 [2022-01-10 07:14:28,286 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 07:14:28,287 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 07:14:28,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 07:14:28,287 INFO L85 PathProgramCache]: Analyzing trace with hash -18191274, now seen corresponding path program 1 times [2022-01-10 07:14:28,288 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 07:14:28,288 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1448728324] [2022-01-10 07:14:28,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 07:14:28,288 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 07:14:28,288 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 07:14:28,289 INFO L229 MonitoredProcess]: Starting monitored process 39 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 07:14:28,290 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (39)] Waiting until timeout for monitored process [2022-01-10 07:14:28,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 07:14:28,370 INFO L263 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-10 07:14:28,371 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 07:14:28,992 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 32 proven. 22 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-01-10 07:14:28,992 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 07:14:29,358 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 32 proven. 22 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-01-10 07:14:29,358 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 07:14:29,358 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1448728324] [2022-01-10 07:14:29,358 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1448728324] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 07:14:29,358 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 07:14:29,358 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2022-01-10 07:14:29,358 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1266292647] [2022-01-10 07:14:29,358 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 07:14:29,358 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-10 07:14:29,358 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 07:14:29,359 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-10 07:14:29,359 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2022-01-10 07:14:29,359 INFO L87 Difference]: Start difference. First operand 1779 states and 2187 transitions. Second operand has 16 states, 16 states have (on average 9.375) internal successors, (150), 15 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:14:29,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 07:14:29,647 INFO L93 Difference]: Finished difference Result 3156 states and 3935 transitions. [2022-01-10 07:14:29,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-10 07:14:29,647 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 9.375) internal successors, (150), 15 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 107 [2022-01-10 07:14:29,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 07:14:29,651 INFO L225 Difference]: With dead ends: 3156 [2022-01-10 07:14:29,651 INFO L226 Difference]: Without dead ends: 2717 [2022-01-10 07:14:29,653 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 221 GetRequests, 199 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=117, Invalid=435, Unknown=0, NotChecked=0, Total=552 [2022-01-10 07:14:29,653 INFO L933 BasicCegarLoop]: 78 mSDtfsCounter, 152 mSDsluCounter, 527 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 152 SdHoareTripleChecker+Valid, 605 SdHoareTripleChecker+Invalid, 87 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 52 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 07:14:29,653 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [152 Valid, 605 Invalid, 87 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 32 Invalid, 0 Unknown, 52 Unchecked, 0.0s Time] [2022-01-10 07:14:29,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2717 states. [2022-01-10 07:14:29,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2717 to 2677. [2022-01-10 07:14:29,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2677 states, 2676 states have (on average 1.241405082212257) internal successors, (3322), 2676 states have internal predecessors, (3322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:14:29,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2677 states to 2677 states and 3322 transitions. [2022-01-10 07:14:29,814 INFO L78 Accepts]: Start accepts. Automaton has 2677 states and 3322 transitions. Word has length 107 [2022-01-10 07:14:29,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 07:14:29,814 INFO L470 AbstractCegarLoop]: Abstraction has 2677 states and 3322 transitions. [2022-01-10 07:14:29,814 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 9.375) internal successors, (150), 15 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:14:29,814 INFO L276 IsEmpty]: Start isEmpty. Operand 2677 states and 3322 transitions. [2022-01-10 07:14:29,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2022-01-10 07:14:29,816 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 07:14:29,816 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 07:14:29,829 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (39)] Forceful destruction successful, exit code 0 [2022-01-10 07:14:30,026 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 07:14:30,026 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 07:14:30,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 07:14:30,026 INFO L85 PathProgramCache]: Analyzing trace with hash 860404460, now seen corresponding path program 1 times [2022-01-10 07:14:30,027 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 07:14:30,027 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1815090030] [2022-01-10 07:14:30,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 07:14:30,027 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 07:14:30,027 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 07:14:30,028 INFO L229 MonitoredProcess]: Starting monitored process 40 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 07:14:30,029 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (40)] Waiting until timeout for monitored process [2022-01-10 07:14:30,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 07:14:30,114 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-10 07:14:30,115 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 07:14:30,548 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 53 proven. 0 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2022-01-10 07:14:30,548 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 07:14:30,548 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 07:14:30,548 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1815090030] [2022-01-10 07:14:30,548 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1815090030] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 07:14:30,548 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 07:14:30,548 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 07:14:30,548 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [943165540] [2022-01-10 07:14:30,548 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 07:14:30,549 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 07:14:30,549 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 07:14:30,549 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 07:14:30,549 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-10 07:14:30,549 INFO L87 Difference]: Start difference. First operand 2677 states and 3322 transitions. Second operand has 5 states, 5 states have (on average 16.2) internal successors, (81), 4 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:14:30,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 07:14:30,705 INFO L93 Difference]: Finished difference Result 3593 states and 4479 transitions. [2022-01-10 07:14:30,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-10 07:14:30,705 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 16.2) internal successors, (81), 4 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 107 [2022-01-10 07:14:30,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 07:14:30,709 INFO L225 Difference]: With dead ends: 3593 [2022-01-10 07:14:30,709 INFO L226 Difference]: Without dead ends: 2645 [2022-01-10 07:14:30,710 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 103 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2022-01-10 07:14:30,711 INFO L933 BasicCegarLoop]: 72 mSDtfsCounter, 59 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 163 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 30 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 07:14:30,711 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [59 Valid, 163 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 8 Invalid, 0 Unknown, 30 Unchecked, 0.0s Time] [2022-01-10 07:14:30,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2645 states. [2022-01-10 07:14:30,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2645 to 2607. [2022-01-10 07:14:30,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2607 states, 2606 states have (on average 1.231772831926324) internal successors, (3210), 2606 states have internal predecessors, (3210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:14:30,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2607 states to 2607 states and 3210 transitions. [2022-01-10 07:14:30,868 INFO L78 Accepts]: Start accepts. Automaton has 2607 states and 3210 transitions. Word has length 107 [2022-01-10 07:14:30,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 07:14:30,868 INFO L470 AbstractCegarLoop]: Abstraction has 2607 states and 3210 transitions. [2022-01-10 07:14:30,868 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.2) internal successors, (81), 4 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:14:30,868 INFO L276 IsEmpty]: Start isEmpty. Operand 2607 states and 3210 transitions. [2022-01-10 07:14:30,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2022-01-10 07:14:30,870 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 07:14:30,870 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 07:14:30,881 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (40)] Forceful destruction successful, exit code 0 [2022-01-10 07:14:31,078 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 07:14:31,079 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 07:14:31,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 07:14:31,079 INFO L85 PathProgramCache]: Analyzing trace with hash 1748392828, now seen corresponding path program 1 times [2022-01-10 07:14:31,079 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 07:14:31,080 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [787675627] [2022-01-10 07:14:31,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 07:14:31,080 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 07:14:31,080 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 07:14:31,081 INFO L229 MonitoredProcess]: Starting monitored process 41 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 07:14:31,083 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (41)] Waiting until timeout for monitored process [2022-01-10 07:14:31,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 07:14:31,163 INFO L263 TraceCheckSpWp]: Trace formula consists of 243 conjuncts, 30 conjunts are in the unsatisfiable core [2022-01-10 07:14:31,165 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 07:14:34,494 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 22 proven. 65 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 07:14:34,494 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 07:14:35,885 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 13 proven. 74 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 07:14:35,885 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 07:14:35,885 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [787675627] [2022-01-10 07:14:35,885 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [787675627] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 07:14:35,885 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 07:14:35,885 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 20] total 43 [2022-01-10 07:14:35,886 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [913278255] [2022-01-10 07:14:35,886 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 07:14:35,886 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-01-10 07:14:35,886 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 07:14:35,886 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-01-10 07:14:35,887 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=1596, Unknown=0, NotChecked=0, Total=1806 [2022-01-10 07:14:35,887 INFO L87 Difference]: Start difference. First operand 2607 states and 3210 transitions. Second operand has 43 states, 43 states have (on average 4.767441860465116) internal successors, (205), 43 states have internal predecessors, (205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:14:37,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 07:14:37,025 INFO L93 Difference]: Finished difference Result 3653 states and 4485 transitions. [2022-01-10 07:14:37,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-01-10 07:14:37,026 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 4.767441860465116) internal successors, (205), 43 states have internal predecessors, (205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 107 [2022-01-10 07:14:37,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 07:14:37,031 INFO L225 Difference]: With dead ends: 3653 [2022-01-10 07:14:37,031 INFO L226 Difference]: Without dead ends: 3386 [2022-01-10 07:14:37,032 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 171 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 568 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=280, Invalid=1976, Unknown=0, NotChecked=0, Total=2256 [2022-01-10 07:14:37,032 INFO L933 BasicCegarLoop]: 127 mSDtfsCounter, 340 mSDsluCounter, 2616 mSDsCounter, 0 mSdLazyCounter, 613 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 340 SdHoareTripleChecker+Valid, 2743 SdHoareTripleChecker+Invalid, 1005 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 613 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 367 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-10 07:14:37,032 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [340 Valid, 2743 Invalid, 1005 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 613 Invalid, 0 Unknown, 367 Unchecked, 0.4s Time] [2022-01-10 07:14:37,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3386 states. [2022-01-10 07:14:37,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3386 to 2623. [2022-01-10 07:14:37,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2623 states, 2622 states have (on average 1.2318840579710144) internal successors, (3230), 2622 states have internal predecessors, (3230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:14:37,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2623 states to 2623 states and 3230 transitions. [2022-01-10 07:14:37,196 INFO L78 Accepts]: Start accepts. Automaton has 2623 states and 3230 transitions. Word has length 107 [2022-01-10 07:14:37,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 07:14:37,196 INFO L470 AbstractCegarLoop]: Abstraction has 2623 states and 3230 transitions. [2022-01-10 07:14:37,196 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 4.767441860465116) internal successors, (205), 43 states have internal predecessors, (205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:14:37,196 INFO L276 IsEmpty]: Start isEmpty. Operand 2623 states and 3230 transitions. [2022-01-10 07:14:37,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2022-01-10 07:14:37,198 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 07:14:37,198 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 07:14:37,210 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (41)] Forceful destruction successful, exit code 0 [2022-01-10 07:14:37,406 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 07:14:37,407 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 07:14:37,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 07:14:37,407 INFO L85 PathProgramCache]: Analyzing trace with hash -273349543, now seen corresponding path program 1 times [2022-01-10 07:14:37,408 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 07:14:37,408 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [877749447] [2022-01-10 07:14:37,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 07:14:37,408 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 07:14:37,408 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 07:14:37,409 INFO L229 MonitoredProcess]: Starting monitored process 42 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 07:14:37,410 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (42)] Waiting until timeout for monitored process [2022-01-10 07:14:37,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 07:14:37,490 INFO L263 TraceCheckSpWp]: Trace formula consists of 243 conjuncts, 28 conjunts are in the unsatisfiable core [2022-01-10 07:14:37,492 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 07:14:40,192 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 31 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 07:14:40,192 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 07:14:41,480 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 13 proven. 74 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 07:14:41,480 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 07:14:41,481 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [877749447] [2022-01-10 07:14:41,481 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [877749447] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 07:14:41,481 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 07:14:41,481 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 21] total 42 [2022-01-10 07:14:41,481 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2021355284] [2022-01-10 07:14:41,481 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 07:14:41,481 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-01-10 07:14:41,481 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 07:14:41,482 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-01-10 07:14:41,482 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=203, Invalid=1519, Unknown=0, NotChecked=0, Total=1722 [2022-01-10 07:14:41,482 INFO L87 Difference]: Start difference. First operand 2623 states and 3230 transitions. Second operand has 42 states, 42 states have (on average 4.880952380952381) internal successors, (205), 42 states have internal predecessors, (205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:14:42,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 07:14:42,173 INFO L93 Difference]: Finished difference Result 3780 states and 4634 transitions. [2022-01-10 07:14:42,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-01-10 07:14:42,173 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 4.880952380952381) internal successors, (205), 42 states have internal predecessors, (205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 107 [2022-01-10 07:14:42,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 07:14:42,177 INFO L225 Difference]: With dead ends: 3780 [2022-01-10 07:14:42,177 INFO L226 Difference]: Without dead ends: 3590 [2022-01-10 07:14:42,178 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 216 GetRequests, 173 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 609 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=252, Invalid=1728, Unknown=0, NotChecked=0, Total=1980 [2022-01-10 07:14:42,179 INFO L933 BasicCegarLoop]: 115 mSDtfsCounter, 325 mSDsluCounter, 2071 mSDsCounter, 0 mSdLazyCounter, 258 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 325 SdHoareTripleChecker+Valid, 2186 SdHoareTripleChecker+Invalid, 475 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 258 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 198 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-10 07:14:42,179 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [325 Valid, 2186 Invalid, 475 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 258 Invalid, 0 Unknown, 198 Unchecked, 0.2s Time] [2022-01-10 07:14:42,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3590 states. [2022-01-10 07:14:42,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3590 to 2611. [2022-01-10 07:14:42,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2611 states, 2610 states have (on average 1.2318007662835249) internal successors, (3215), 2610 states have internal predecessors, (3215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:14:42,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2611 states to 2611 states and 3215 transitions. [2022-01-10 07:14:42,402 INFO L78 Accepts]: Start accepts. Automaton has 2611 states and 3215 transitions. Word has length 107 [2022-01-10 07:14:42,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 07:14:42,402 INFO L470 AbstractCegarLoop]: Abstraction has 2611 states and 3215 transitions. [2022-01-10 07:14:42,402 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 4.880952380952381) internal successors, (205), 42 states have internal predecessors, (205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:14:42,403 INFO L276 IsEmpty]: Start isEmpty. Operand 2611 states and 3215 transitions. [2022-01-10 07:14:42,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2022-01-10 07:14:42,404 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 07:14:42,404 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 07:14:42,415 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (42)] Forceful destruction successful, exit code 0 [2022-01-10 07:14:42,613 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 07:14:42,613 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 07:14:42,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 07:14:42,614 INFO L85 PathProgramCache]: Analyzing trace with hash -580554192, now seen corresponding path program 1 times [2022-01-10 07:14:42,614 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 07:14:42,614 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1391775233] [2022-01-10 07:14:42,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 07:14:42,614 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 07:14:42,614 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 07:14:42,616 INFO L229 MonitoredProcess]: Starting monitored process 43 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 07:14:42,617 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (43)] Waiting until timeout for monitored process [2022-01-10 07:14:42,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 07:14:42,697 INFO L263 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-10 07:14:42,699 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 07:14:43,532 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 22 proven. 46 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-01-10 07:14:43,532 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 07:14:43,810 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 22 proven. 46 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-01-10 07:14:43,810 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 07:14:43,810 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1391775233] [2022-01-10 07:14:43,810 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1391775233] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 07:14:43,810 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 07:14:43,810 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2022-01-10 07:14:43,810 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1503617447] [2022-01-10 07:14:43,810 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 07:14:43,811 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-10 07:14:43,811 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 07:14:43,811 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-10 07:14:43,811 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2022-01-10 07:14:43,811 INFO L87 Difference]: Start difference. First operand 2611 states and 3215 transitions. Second operand has 16 states, 16 states have (on average 11.0) internal successors, (176), 15 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:14:44,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 07:14:44,281 INFO L93 Difference]: Finished difference Result 5277 states and 6581 transitions. [2022-01-10 07:14:44,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-10 07:14:44,281 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 11.0) internal successors, (176), 15 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 107 [2022-01-10 07:14:44,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 07:14:44,289 INFO L225 Difference]: With dead ends: 5277 [2022-01-10 07:14:44,289 INFO L226 Difference]: Without dead ends: 4848 [2022-01-10 07:14:44,290 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 222 GetRequests, 200 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=119, Invalid=433, Unknown=0, NotChecked=0, Total=552 [2022-01-10 07:14:44,291 INFO L933 BasicCegarLoop]: 90 mSDtfsCounter, 167 mSDsluCounter, 642 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 167 SdHoareTripleChecker+Valid, 732 SdHoareTripleChecker+Invalid, 147 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 88 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 07:14:44,291 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [167 Valid, 732 Invalid, 147 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 55 Invalid, 0 Unknown, 88 Unchecked, 0.0s Time] [2022-01-10 07:14:44,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4848 states. [2022-01-10 07:14:44,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4848 to 4832. [2022-01-10 07:14:44,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4832 states, 4831 states have (on average 1.2330780376733597) internal successors, (5957), 4831 states have internal predecessors, (5957), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:14:44,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4832 states to 4832 states and 5957 transitions. [2022-01-10 07:14:44,706 INFO L78 Accepts]: Start accepts. Automaton has 4832 states and 5957 transitions. Word has length 107 [2022-01-10 07:14:44,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 07:14:44,706 INFO L470 AbstractCegarLoop]: Abstraction has 4832 states and 5957 transitions. [2022-01-10 07:14:44,706 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 11.0) internal successors, (176), 15 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:14:44,707 INFO L276 IsEmpty]: Start isEmpty. Operand 4832 states and 5957 transitions. [2022-01-10 07:14:44,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2022-01-10 07:14:44,708 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 07:14:44,708 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 07:14:44,717 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (43)] Ended with exit code 0 [2022-01-10 07:14:44,916 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 07:14:44,916 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 07:14:44,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 07:14:44,916 INFO L85 PathProgramCache]: Analyzing trace with hash -1716287961, now seen corresponding path program 1 times [2022-01-10 07:14:44,916 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 07:14:44,916 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [627005260] [2022-01-10 07:14:44,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 07:14:44,917 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 07:14:44,917 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 07:14:44,918 INFO L229 MonitoredProcess]: Starting monitored process 44 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 07:14:44,918 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (44)] Waiting until timeout for monitored process [2022-01-10 07:14:45,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 07:14:45,018 INFO L263 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-10 07:14:45,020 INFO L286 TraceCheckSpWp]: Computing forward predicates...