/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/pals_lcr.3.1.ufo.UNBOUNDED.pals.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-a10ec3b [2022-01-10 06:51:02,259 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-10 06:51:02,261 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-10 06:51:02,309 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-01-10 06:51:02,367 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/BvToInt/svcomp-Reach-64bit-Automizer_Bitvector.epf [2022-01-10 06:51:02,402 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-10 06:51:02,402 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-10 06:51:02,403 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-01-10 06:51:02,403 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-01-10 06:51:02,403 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-01-10 06:51:02,403 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-01-10 06:51:02,404 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-01-10 06:51:02,404 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-01-10 06:51:02,404 INFO L138 SettingsManager]: * Use SBE=true [2022-01-10 06:51:02,404 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-10 06:51:02,404 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-10 06:51:02,405 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-10 06:51:02,405 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-10 06:51:02,405 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-10 06:51:02,405 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-10 06:51:02,405 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-01-10 06:51:02,405 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-01-10 06:51:02,405 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-01-10 06:51:02,405 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-10 06:51:02,405 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-10 06:51:02,406 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-10 06:51:02,406 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-10 06:51:02,406 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-10 06:51:02,406 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-10 06:51:02,406 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-10 06:51:02,406 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-01-10 06:51:02,406 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-01-10 06:51:02,406 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2022-01-10 06:51:02,407 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-01-10 06:51:02,407 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-01-10 06:51:02,407 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-01-10 06:51:02,407 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-01-10 06:51:02,407 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-01-10 06:51:02,407 INFO L138 SettingsManager]: * Logic for external solver=AUFBV WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-10 06:51:02,642 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-10 06:51:02,659 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-10 06:51:02,661 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-10 06:51:02,662 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-10 06:51:02,663 INFO L275 PluginConnector]: CDTParser initialized [2022-01-10 06:51:02,664 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded/pals_lcr.3.1.ufo.UNBOUNDED.pals.c [2022-01-10 06:51:02,725 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fef421d94/4fcda4b97a9b4e669d0d3877b1f44ee0/FLAG16c398fdb [2022-01-10 06:51:03,092 INFO L306 CDTParser]: Found 1 translation units. [2022-01-10 06:51:03,092 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/seq-mthreaded/pals_lcr.3.1.ufo.UNBOUNDED.pals.c [2022-01-10 06:51:03,099 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fef421d94/4fcda4b97a9b4e669d0d3877b1f44ee0/FLAG16c398fdb [2022-01-10 06:51:03,502 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fef421d94/4fcda4b97a9b4e669d0d3877b1f44ee0 [2022-01-10 06:51:03,504 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-10 06:51:03,505 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-01-10 06:51:03,507 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-10 06:51:03,507 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-10 06:51:03,510 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-10 06:51:03,511 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 06:51:03" (1/1) ... [2022-01-10 06:51:03,511 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7f08dafe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:51:03, skipping insertion in model container [2022-01-10 06:51:03,512 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 06:51:03" (1/1) ... [2022-01-10 06:51:03,520 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-10 06:51:03,551 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-10 06:51:03,736 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/pals_lcr.3.1.ufo.UNBOUNDED.pals.c[6080,6093] [2022-01-10 06:51:03,745 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-10 06:51:03,761 INFO L203 MainTranslator]: Completed pre-run [2022-01-10 06:51:03,795 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/pals_lcr.3.1.ufo.UNBOUNDED.pals.c[6080,6093] [2022-01-10 06:51:03,796 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-10 06:51:03,808 INFO L208 MainTranslator]: Completed translation [2022-01-10 06:51:03,809 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:51:03 WrapperNode [2022-01-10 06:51:03,809 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-10 06:51:03,810 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-01-10 06:51:03,810 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-01-10 06:51:03,810 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-01-10 06:51:03,816 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:51:03" (1/1) ... [2022-01-10 06:51:03,837 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:51:03" (1/1) ... [2022-01-10 06:51:03,866 INFO L137 Inliner]: procedures = 23, calls = 14, calls flagged for inlining = 9, calls inlined = 9, statements flattened = 209 [2022-01-10 06:51:03,867 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-01-10 06:51:03,868 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-10 06:51:03,868 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-10 06:51:03,868 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-10 06:51:03,875 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:51:03" (1/1) ... [2022-01-10 06:51:03,875 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:51:03" (1/1) ... [2022-01-10 06:51:03,888 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:51:03" (1/1) ... [2022-01-10 06:51:03,889 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:51:03" (1/1) ... [2022-01-10 06:51:03,894 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:51:03" (1/1) ... [2022-01-10 06:51:03,898 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:51:03" (1/1) ... [2022-01-10 06:51:03,916 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:51:03" (1/1) ... [2022-01-10 06:51:03,919 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-10 06:51:03,920 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-10 06:51:03,920 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-10 06:51:03,920 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-10 06:51:03,921 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:51:03" (1/1) ... [2022-01-10 06:51:03,937 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-10 06:51:03,949 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 06:51:03,969 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-01-10 06:51:03,989 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-01-10 06:51:04,005 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-10 06:51:04,006 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-01-10 06:51:04,006 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-10 06:51:04,006 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-10 06:51:04,091 INFO L234 CfgBuilder]: Building ICFG [2022-01-10 06:51:04,092 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-10 06:51:04,316 INFO L275 CfgBuilder]: Performing block encoding [2022-01-10 06:51:04,321 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-10 06:51:04,321 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-01-10 06:51:04,323 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 06:51:04 BoogieIcfgContainer [2022-01-10 06:51:04,323 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-10 06:51:04,324 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-10 06:51:04,325 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-10 06:51:04,327 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-10 06:51:04,328 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 10.01 06:51:03" (1/3) ... [2022-01-10 06:51:04,328 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3885ff15 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 06:51:04, skipping insertion in model container [2022-01-10 06:51:04,328 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:51:03" (2/3) ... [2022-01-10 06:51:04,329 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3885ff15 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 06:51:04, skipping insertion in model container [2022-01-10 06:51:04,329 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 06:51:04" (3/3) ... [2022-01-10 06:51:04,330 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr.3.1.ufo.UNBOUNDED.pals.c [2022-01-10 06:51:04,334 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-01-10 06:51:04,334 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-10 06:51:04,388 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-10 06:51:04,394 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2022-01-10 06:51:04,394 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-01-10 06:51:04,421 INFO L276 IsEmpty]: Start isEmpty. Operand has 64 states, 62 states have (on average 1.6774193548387097) internal successors, (104), 63 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 06:51:04,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-01-10 06:51:04,427 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:51:04,427 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:51:04,428 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:51:04,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:51:04,435 INFO L85 PathProgramCache]: Analyzing trace with hash -980022832, now seen corresponding path program 1 times [2022-01-10 06:51:04,446 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:51:04,448 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1038799562] [2022-01-10 06:51:04,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:51:04,449 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:51:04,449 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:51:04,455 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:51:04,497 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2022-01-10 06:51:04,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:51:04,594 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 1 conjunts are in the unsatisfiable core [2022-01-10 06:51:04,599 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:51:04,668 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 06:51:04,669 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:51:04,669 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:51:04,669 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1038799562] [2022-01-10 06:51:04,670 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1038799562] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:51:04,670 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:51:04,670 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-01-10 06:51:04,672 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2017148254] [2022-01-10 06:51:04,673 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:51:04,677 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-01-10 06:51:04,677 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:51:04,703 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-01-10 06:51:04,704 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-01-10 06:51:04,706 INFO L87 Difference]: Start difference. First operand has 64 states, 62 states have (on average 1.6774193548387097) internal successors, (104), 63 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) Second operand has 2 states, 2 states have (on average 12.5) internal successors, (25), 2 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 06:51:04,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:51:04,732 INFO L93 Difference]: Finished difference Result 103 states and 167 transitions. [2022-01-10 06:51:04,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-01-10 06:51:04,734 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 12.5) internal successors, (25), 2 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-01-10 06:51:04,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:51:04,741 INFO L225 Difference]: With dead ends: 103 [2022-01-10 06:51:04,741 INFO L226 Difference]: Without dead ends: 60 [2022-01-10 06:51:04,744 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-01-10 06:51:04,746 INFO L933 BasicCegarLoop]: 97 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 97 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 06:51:04,747 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 97 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 06:51:04,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2022-01-10 06:51:04,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2022-01-10 06:51:04,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 59 states have (on average 1.6440677966101696) internal successors, (97), 59 states have internal predecessors, (97), 0 states have call successors, (0), 0 states 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 06:51:04,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 97 transitions. [2022-01-10 06:51:04,783 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 97 transitions. Word has length 25 [2022-01-10 06:51:04,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:51:04,784 INFO L470 AbstractCegarLoop]: Abstraction has 60 states and 97 transitions. [2022-01-10 06:51:04,784 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 12.5) internal successors, (25), 2 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 06:51:04,784 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 97 transitions. [2022-01-10 06:51:04,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-01-10 06:51:04,785 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:51:04,785 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:51:04,793 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2022-01-10 06:51:04,989 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 06:51:04,989 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:51:04,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:51:04,990 INFO L85 PathProgramCache]: Analyzing trace with hash -1797671282, now seen corresponding path program 1 times [2022-01-10 06:51:04,991 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:51:04,991 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [91139581] [2022-01-10 06:51:04,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:51:04,991 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:51:04,992 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:51:04,993 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:51:04,995 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2022-01-10 06:51:05,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:51:05,071 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-10 06:51:05,080 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:51:05,156 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 06:51:05,156 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:51:05,156 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:51:05,156 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [91139581] [2022-01-10 06:51:05,157 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [91139581] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:51:05,157 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:51:05,157 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-10 06:51:05,157 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [406218286] [2022-01-10 06:51:05,157 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:51:05,158 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 06:51:05,159 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:51:05,159 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 06:51:05,159 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-10 06:51:05,160 INFO L87 Difference]: Start difference. First operand 60 states and 97 transitions. Second operand has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 06:51:05,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:51:05,233 INFO L93 Difference]: Finished difference Result 102 states and 160 transitions. [2022-01-10 06:51:05,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-10 06:51:05,236 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-01-10 06:51:05,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:51:05,238 INFO L225 Difference]: With dead ends: 102 [2022-01-10 06:51:05,238 INFO L226 Difference]: Without dead ends: 60 [2022-01-10 06:51:05,238 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-01-10 06:51:05,240 INFO L933 BasicCegarLoop]: 95 mSDtfsCounter, 3 mSDsluCounter, 266 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 361 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 06:51:05,240 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 361 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 06:51:05,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2022-01-10 06:51:05,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2022-01-10 06:51:05,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 59 states have (on average 1.3728813559322033) internal successors, (81), 59 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 06:51:05,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 81 transitions. [2022-01-10 06:51:05,253 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 81 transitions. Word has length 25 [2022-01-10 06:51:05,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:51:05,254 INFO L470 AbstractCegarLoop]: Abstraction has 60 states and 81 transitions. [2022-01-10 06:51:05,254 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 06:51:05,254 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 81 transitions. [2022-01-10 06:51:05,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-01-10 06:51:05,255 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:51:05,255 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] [2022-01-10 06:51:05,263 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2022-01-10 06:51:05,455 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 06:51:05,456 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:51:05,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:51:05,457 INFO L85 PathProgramCache]: Analyzing trace with hash 1903157419, now seen corresponding path program 1 times [2022-01-10 06:51:05,458 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:51:05,458 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [91965491] [2022-01-10 06:51:05,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:51:05,458 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:51:05,459 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:51:05,460 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:51:05,462 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2022-01-10 06:51:05,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:51:05,540 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-10 06:51:05,542 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:51:05,653 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 06:51:05,653 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:51:05,653 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:51:05,654 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [91965491] [2022-01-10 06:51:05,654 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [91965491] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:51:05,655 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:51:05,655 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 06:51:05,658 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [85699895] [2022-01-10 06:51:05,658 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:51:05,659 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 06:51:05,659 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:51:05,661 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 06:51:05,661 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 06:51:05,661 INFO L87 Difference]: Start difference. First operand 60 states and 81 transitions. Second operand has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 06:51:05,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:51:05,692 INFO L93 Difference]: Finished difference Result 130 states and 189 transitions. [2022-01-10 06:51:05,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 06:51:05,692 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2022-01-10 06:51:05,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:51:05,697 INFO L225 Difference]: With dead ends: 130 [2022-01-10 06:51:05,697 INFO L226 Difference]: Without dead ends: 92 [2022-01-10 06:51:05,697 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 38 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 06:51:05,698 INFO L933 BasicCegarLoop]: 110 mSDtfsCounter, 45 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 171 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 06:51:05,699 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 171 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 06:51:05,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2022-01-10 06:51:05,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 90. [2022-01-10 06:51:05,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 89 states have (on average 1.4382022471910112) internal successors, (128), 89 states have internal predecessors, (128), 0 states have call successors, (0), 0 states 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 06:51:05,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 128 transitions. [2022-01-10 06:51:05,707 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 128 transitions. Word has length 40 [2022-01-10 06:51:05,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:51:05,707 INFO L470 AbstractCegarLoop]: Abstraction has 90 states and 128 transitions. [2022-01-10 06:51:05,707 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 06:51:05,708 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 128 transitions. [2022-01-10 06:51:05,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-01-10 06:51:05,709 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:51:05,709 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] [2022-01-10 06:51:05,715 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2022-01-10 06:51:05,911 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 06:51:05,911 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:51:05,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:51:05,912 INFO L85 PathProgramCache]: Analyzing trace with hash -2054016735, now seen corresponding path program 1 times [2022-01-10 06:51:05,913 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:51:05,913 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2024977535] [2022-01-10 06:51:05,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:51:05,913 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:51:05,913 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:51:05,914 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:51:05,916 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2022-01-10 06:51:05,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:51:05,969 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-10 06:51:05,971 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:51:06,078 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 06:51:06,078 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:51:06,079 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:51:06,079 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2024977535] [2022-01-10 06:51:06,081 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2024977535] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:51:06,081 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:51:06,081 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 06:51:06,081 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [37116622] [2022-01-10 06:51:06,084 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:51:06,084 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 06:51:06,084 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:51:06,085 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 06:51:06,085 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 06:51:06,085 INFO L87 Difference]: Start difference. First operand 90 states and 128 transitions. Second operand has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 06:51:06,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:51:06,105 INFO L93 Difference]: Finished difference Result 214 states and 320 transitions. [2022-01-10 06:51:06,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 06:51:06,106 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2022-01-10 06:51:06,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:51:06,107 INFO L225 Difference]: With dead ends: 214 [2022-01-10 06:51:06,107 INFO L226 Difference]: Without dead ends: 146 [2022-01-10 06:51:06,108 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 38 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 06:51:06,109 INFO L933 BasicCegarLoop]: 105 mSDtfsCounter, 41 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 170 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 06:51:06,109 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 170 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 06:51:06,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2022-01-10 06:51:06,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 144. [2022-01-10 06:51:06,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144 states, 143 states have (on average 1.4755244755244756) internal successors, (211), 143 states have internal predecessors, (211), 0 states have call successors, (0), 0 states 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 06:51:06,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 211 transitions. [2022-01-10 06:51:06,124 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 211 transitions. Word has length 40 [2022-01-10 06:51:06,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:51:06,124 INFO L470 AbstractCegarLoop]: Abstraction has 144 states and 211 transitions. [2022-01-10 06:51:06,125 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 06:51:06,125 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 211 transitions. [2022-01-10 06:51:06,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-01-10 06:51:06,125 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:51:06,126 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] [2022-01-10 06:51:06,135 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2022-01-10 06:51:06,326 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 06:51:06,327 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:51:06,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:51:06,327 INFO L85 PathProgramCache]: Analyzing trace with hash -836031337, now seen corresponding path program 1 times [2022-01-10 06:51:06,328 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:51:06,328 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [279999193] [2022-01-10 06:51:06,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:51:06,328 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:51:06,328 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:51:06,329 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:51:06,330 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2022-01-10 06:51:06,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:51:06,381 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-10 06:51:06,383 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:51:06,656 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 06:51:06,656 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:51:06,656 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:51:06,656 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [279999193] [2022-01-10 06:51:06,659 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [279999193] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:51:06,660 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:51:06,662 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-10 06:51:06,663 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [588367197] [2022-01-10 06:51:06,668 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:51:06,668 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 06:51:06,669 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:51:06,669 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 06:51:06,669 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-01-10 06:51:06,669 INFO L87 Difference]: Start difference. First operand 144 states and 211 transitions. Second operand has 5 states, 5 states have (on average 8.0) internal successors, (40), 5 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 06:51:06,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:51:06,743 INFO L93 Difference]: Finished difference Result 632 states and 967 transitions. [2022-01-10 06:51:06,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-10 06:51:06,744 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.0) internal successors, (40), 5 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2022-01-10 06:51:06,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:51:06,748 INFO L225 Difference]: With dead ends: 632 [2022-01-10 06:51:06,748 INFO L226 Difference]: Without dead ends: 510 [2022-01-10 06:51:06,749 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 36 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 06:51:06,750 INFO L933 BasicCegarLoop]: 78 mSDtfsCounter, 292 mSDsluCounter, 176 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 292 SdHoareTripleChecker+Valid, 254 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 06:51:06,750 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [292 Valid, 254 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 06:51:06,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 510 states. [2022-01-10 06:51:06,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 510 to 384. [2022-01-10 06:51:06,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 384 states, 383 states have (on average 1.5013054830287207) internal successors, (575), 383 states have internal predecessors, (575), 0 states have call successors, (0), 0 states 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 06:51:06,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 384 states to 384 states and 575 transitions. [2022-01-10 06:51:06,781 INFO L78 Accepts]: Start accepts. Automaton has 384 states and 575 transitions. Word has length 40 [2022-01-10 06:51:06,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:51:06,781 INFO L470 AbstractCegarLoop]: Abstraction has 384 states and 575 transitions. [2022-01-10 06:51:06,782 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.0) internal successors, (40), 5 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 06:51:06,782 INFO L276 IsEmpty]: Start isEmpty. Operand 384 states and 575 transitions. [2022-01-10 06:51:06,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-01-10 06:51:06,783 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:51:06,783 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 06:51:06,795 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2022-01-10 06:51:06,991 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 06:51:06,991 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:51:06,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:51:06,992 INFO L85 PathProgramCache]: Analyzing trace with hash -1682931033, now seen corresponding path program 1 times [2022-01-10 06:51:06,992 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:51:06,993 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [574124850] [2022-01-10 06:51:06,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:51:06,993 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:51:06,993 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:51:06,994 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:51:06,996 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2022-01-10 06:51:07,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:51:07,042 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-10 06:51:07,044 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:51:07,137 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 06:51:07,138 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:51:07,138 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:51:07,138 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [574124850] [2022-01-10 06:51:07,138 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [574124850] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:51:07,138 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:51:07,138 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 06:51:07,138 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1081291678] [2022-01-10 06:51:07,138 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:51:07,139 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 06:51:07,139 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:51:07,139 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 06:51:07,139 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 06:51:07,139 INFO L87 Difference]: Start difference. First operand 384 states and 575 transitions. Second operand has 3 states, 3 states have (on average 14.0) internal successors, (42), 3 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 06:51:07,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:51:07,192 INFO L93 Difference]: Finished difference Result 1044 states and 1569 transitions. [2022-01-10 06:51:07,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 06:51:07,192 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 14.0) internal successors, (42), 3 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 06:51:07,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:51:07,195 INFO L225 Difference]: With dead ends: 1044 [2022-01-10 06:51:07,195 INFO L226 Difference]: Without dead ends: 682 [2022-01-10 06:51:07,197 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 40 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 06:51:07,201 INFO L933 BasicCegarLoop]: 79 mSDtfsCounter, 32 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 131 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 06:51:07,202 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [32 Valid, 131 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 06:51:07,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 682 states. [2022-01-10 06:51:07,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 682 to 668. [2022-01-10 06:51:07,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 668 states, 667 states have (on average 1.4557721139430284) internal successors, (971), 667 states have internal predecessors, (971), 0 states have call successors, (0), 0 states 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 06:51:07,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 668 states to 668 states and 971 transitions. [2022-01-10 06:51:07,251 INFO L78 Accepts]: Start accepts. Automaton has 668 states and 971 transitions. Word has length 42 [2022-01-10 06:51:07,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:51:07,252 INFO L470 AbstractCegarLoop]: Abstraction has 668 states and 971 transitions. [2022-01-10 06:51:07,252 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.0) internal successors, (42), 3 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 06:51:07,252 INFO L276 IsEmpty]: Start isEmpty. Operand 668 states and 971 transitions. [2022-01-10 06:51:07,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-01-10 06:51:07,258 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:51:07,258 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, 1] [2022-01-10 06:51:07,271 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2022-01-10 06:51:07,466 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 06:51:07,467 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:51:07,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:51:07,467 INFO L85 PathProgramCache]: Analyzing trace with hash 1015321205, now seen corresponding path program 1 times [2022-01-10 06:51:07,468 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:51:07,468 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [190086188] [2022-01-10 06:51:07,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:51:07,468 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:51:07,468 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:51:07,469 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:51:07,471 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2022-01-10 06:51:07,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:51:07,516 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-10 06:51:07,518 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:51:07,588 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 06:51:07,589 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:51:07,589 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:51:07,589 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [190086188] [2022-01-10 06:51:07,589 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [190086188] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:51:07,589 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:51:07,589 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-10 06:51:07,589 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [398866468] [2022-01-10 06:51:07,589 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:51:07,590 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 06:51:07,590 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:51:07,590 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 06:51:07,590 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-10 06:51:07,590 INFO L87 Difference]: Start difference. First operand 668 states and 971 transitions. Second operand has 5 states, 5 states have (on average 8.6) internal successors, (43), 5 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 06:51:07,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:51:07,664 INFO L93 Difference]: Finished difference Result 1233 states and 1775 transitions. [2022-01-10 06:51:07,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-10 06:51:07,665 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.6) internal successors, (43), 5 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2022-01-10 06:51:07,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:51:07,671 INFO L225 Difference]: With dead ends: 1233 [2022-01-10 06:51:07,671 INFO L226 Difference]: Without dead ends: 1231 [2022-01-10 06:51:07,671 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-01-10 06:51:07,672 INFO L933 BasicCegarLoop]: 117 mSDtfsCounter, 147 mSDsluCounter, 245 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 147 SdHoareTripleChecker+Valid, 362 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 06:51:07,673 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [147 Valid, 362 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 06:51:07,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1231 states. [2022-01-10 06:51:07,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1231 to 716. [2022-01-10 06:51:07,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 716 states, 715 states have (on average 1.4195804195804196) internal successors, (1015), 715 states have internal predecessors, (1015), 0 states have call successors, (0), 0 states 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 06:51:07,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 716 states to 716 states and 1015 transitions. [2022-01-10 06:51:07,711 INFO L78 Accepts]: Start accepts. Automaton has 716 states and 1015 transitions. Word has length 43 [2022-01-10 06:51:07,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:51:07,712 INFO L470 AbstractCegarLoop]: Abstraction has 716 states and 1015 transitions. [2022-01-10 06:51:07,713 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.6) internal successors, (43), 5 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 06:51:07,713 INFO L276 IsEmpty]: Start isEmpty. Operand 716 states and 1015 transitions. [2022-01-10 06:51:07,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-01-10 06:51:07,717 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:51:07,717 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, 1, 1] [2022-01-10 06:51:07,729 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 06:51:07,926 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 06:51:07,926 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:51:07,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:51:07,927 INFO L85 PathProgramCache]: Analyzing trace with hash 1022832678, now seen corresponding path program 1 times [2022-01-10 06:51:07,927 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:51:07,927 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1192268102] [2022-01-10 06:51:07,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:51:07,927 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:51:07,928 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:51:07,929 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:51:07,931 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2022-01-10 06:51:07,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:51:07,975 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-10 06:51:07,976 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:51:08,057 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 06:51:08,058 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:51:08,058 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:51:08,058 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1192268102] [2022-01-10 06:51:08,058 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1192268102] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:51:08,058 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:51:08,058 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 06:51:08,059 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [267576851] [2022-01-10 06:51:08,059 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:51:08,060 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 06:51:08,060 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:51:08,060 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 06:51:08,060 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 06:51:08,061 INFO L87 Difference]: Start difference. First operand 716 states and 1015 transitions. Second operand has 3 states, 3 states have (on average 14.666666666666666) internal successors, (44), 3 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 06:51:08,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:51:08,103 INFO L93 Difference]: Finished difference Result 1419 states and 2041 transitions. [2022-01-10 06:51:08,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 06:51:08,103 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 14.666666666666666) internal successors, (44), 3 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2022-01-10 06:51:08,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:51:08,107 INFO L225 Difference]: With dead ends: 1419 [2022-01-10 06:51:08,107 INFO L226 Difference]: Without dead ends: 1020 [2022-01-10 06:51:08,108 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 42 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 06:51:08,109 INFO L933 BasicCegarLoop]: 119 mSDtfsCounter, 46 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 176 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 06:51:08,109 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [46 Valid, 176 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 06:51:08,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1020 states. [2022-01-10 06:51:08,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1020 to 1018. [2022-01-10 06:51:08,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1018 states, 1017 states have (on average 1.4129793510324484) internal successors, (1437), 1017 states have internal predecessors, (1437), 0 states have call successors, (0), 0 states 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 06:51:08,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1018 states to 1018 states and 1437 transitions. [2022-01-10 06:51:08,153 INFO L78 Accepts]: Start accepts. Automaton has 1018 states and 1437 transitions. Word has length 44 [2022-01-10 06:51:08,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:51:08,153 INFO L470 AbstractCegarLoop]: Abstraction has 1018 states and 1437 transitions. [2022-01-10 06:51:08,154 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.666666666666666) internal successors, (44), 3 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 06:51:08,154 INFO L276 IsEmpty]: Start isEmpty. Operand 1018 states and 1437 transitions. [2022-01-10 06:51:08,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-01-10 06:51:08,154 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:51:08,155 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, 1, 1] [2022-01-10 06:51:08,163 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 06:51:08,363 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 06:51:08,363 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:51:08,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:51:08,364 INFO L85 PathProgramCache]: Analyzing trace with hash 1290367787, now seen corresponding path program 1 times [2022-01-10 06:51:08,364 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:51:08,364 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [949839716] [2022-01-10 06:51:08,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:51:08,365 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:51:08,365 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:51:08,366 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:51:08,368 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2022-01-10 06:51:08,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:51:08,423 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-10 06:51:08,426 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:51:08,512 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 06:51:08,512 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:51:08,513 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:51:08,513 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [949839716] [2022-01-10 06:51:08,513 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [949839716] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:51:08,513 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:51:08,513 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 06:51:08,513 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [157832697] [2022-01-10 06:51:08,513 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:51:08,514 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 06:51:08,514 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:51:08,514 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 06:51:08,514 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 06:51:08,515 INFO L87 Difference]: Start difference. First operand 1018 states and 1437 transitions. Second operand has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 06:51:08,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:51:08,551 INFO L93 Difference]: Finished difference Result 1740 states and 2473 transitions. [2022-01-10 06:51:08,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 06:51:08,552 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2022-01-10 06:51:08,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:51:08,555 INFO L225 Difference]: With dead ends: 1740 [2022-01-10 06:51:08,555 INFO L226 Difference]: Without dead ends: 746 [2022-01-10 06:51:08,556 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 61 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 06:51:08,558 INFO L933 BasicCegarLoop]: 105 mSDtfsCounter, 36 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 170 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 06:51:08,558 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 170 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 06:51:08,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 746 states. [2022-01-10 06:51:08,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 746 to 744. [2022-01-10 06:51:08,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 744 states, 743 states have (on average 1.407806191117093) internal successors, (1046), 743 states have internal predecessors, (1046), 0 states have call successors, (0), 0 states 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 06:51:08,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 744 states to 744 states and 1046 transitions. [2022-01-10 06:51:08,586 INFO L78 Accepts]: Start accepts. Automaton has 744 states and 1046 transitions. Word has length 63 [2022-01-10 06:51:08,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:51:08,586 INFO L470 AbstractCegarLoop]: Abstraction has 744 states and 1046 transitions. [2022-01-10 06:51:08,587 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 06:51:08,587 INFO L276 IsEmpty]: Start isEmpty. Operand 744 states and 1046 transitions. [2022-01-10 06:51:08,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-01-10 06:51:08,587 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:51:08,587 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, 1] [2022-01-10 06:51:08,598 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2022-01-10 06:51:08,796 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 06:51:08,797 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:51:08,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:51:08,797 INFO L85 PathProgramCache]: Analyzing trace with hash -1575580592, now seen corresponding path program 1 times [2022-01-10 06:51:08,798 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:51:08,798 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [96594783] [2022-01-10 06:51:08,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:51:08,798 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:51:08,798 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:51:08,799 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:51:08,802 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2022-01-10 06:51:08,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:51:08,854 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-10 06:51:08,856 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:51:09,766 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 06:51:09,766 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 06:51:10,018 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 06:51:10,019 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:51:10,019 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [96594783] [2022-01-10 06:51:10,019 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [96594783] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 06:51:10,019 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 06:51:10,019 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2022-01-10 06:51:10,019 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [898112864] [2022-01-10 06:51:10,019 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 06:51:10,020 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-10 06:51:10,020 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:51:10,021 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-10 06:51:10,021 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2022-01-10 06:51:10,022 INFO L87 Difference]: Start difference. First operand 744 states and 1046 transitions. Second operand has 16 states, 16 states have (on average 7.4375) internal successors, (119), 15 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 06:51:10,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:51:10,124 INFO L93 Difference]: Finished difference Result 1477 states and 2089 transitions. [2022-01-10 06:51:10,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-10 06:51:10,125 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 7.4375) internal successors, (119), 15 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 65 [2022-01-10 06:51:10,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:51:10,128 INFO L225 Difference]: With dead ends: 1477 [2022-01-10 06:51:10,128 INFO L226 Difference]: Without dead ends: 779 [2022-01-10 06:51:10,130 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=64, Invalid=242, Unknown=0, NotChecked=0, Total=306 [2022-01-10 06:51:10,131 INFO L933 BasicCegarLoop]: 66 mSDtfsCounter, 89 mSDsluCounter, 472 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 538 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 40 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 06:51:10,132 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [89 Valid, 538 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 21 Invalid, 0 Unknown, 40 Unchecked, 0.0s Time] [2022-01-10 06:51:10,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 779 states. [2022-01-10 06:51:10,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 779 to 777. [2022-01-10 06:51:10,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 777 states, 776 states have (on average 1.3994845360824741) internal successors, (1086), 776 states have internal predecessors, (1086), 0 states have call successors, (0), 0 states 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 06:51:10,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 777 states to 777 states and 1086 transitions. [2022-01-10 06:51:10,165 INFO L78 Accepts]: Start accepts. Automaton has 777 states and 1086 transitions. Word has length 65 [2022-01-10 06:51:10,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:51:10,166 INFO L470 AbstractCegarLoop]: Abstraction has 777 states and 1086 transitions. [2022-01-10 06:51:10,166 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 7.4375) internal successors, (119), 15 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 06:51:10,166 INFO L276 IsEmpty]: Start isEmpty. Operand 777 states and 1086 transitions. [2022-01-10 06:51:10,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-01-10 06:51:10,167 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:51:10,167 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, 1, 1, 1, 1] [2022-01-10 06:51:10,178 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2022-01-10 06:51:10,379 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 06:51:10,380 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:51:10,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:51:10,380 INFO L85 PathProgramCache]: Analyzing trace with hash -1237787450, now seen corresponding path program 1 times [2022-01-10 06:51:10,380 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:51:10,380 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1780726968] [2022-01-10 06:51:10,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:51:10,380 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:51:10,381 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:51:10,382 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:51:10,383 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2022-01-10 06:51:10,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:51:10,438 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-10 06:51:10,440 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:51:10,523 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 06:51:10,523 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:51:10,524 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:51:10,524 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1780726968] [2022-01-10 06:51:10,524 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1780726968] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:51:10,524 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:51:10,524 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 06:51:10,524 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [727673384] [2022-01-10 06:51:10,524 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:51:10,525 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 06:51:10,525 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:51:10,525 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 06:51:10,525 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 06:51:10,526 INFO L87 Difference]: Start difference. First operand 777 states and 1086 transitions. Second operand has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 06:51:10,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:51:10,554 INFO L93 Difference]: Finished difference Result 1129 states and 1586 transitions. [2022-01-10 06:51:10,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 06:51:10,554 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2022-01-10 06:51:10,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:51:10,556 INFO L225 Difference]: With dead ends: 1129 [2022-01-10 06:51:10,556 INFO L226 Difference]: Without dead ends: 431 [2022-01-10 06:51:10,557 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 63 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 06:51:10,558 INFO L933 BasicCegarLoop]: 98 mSDtfsCounter, 28 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 155 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 06:51:10,558 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 155 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 06:51:10,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 431 states. [2022-01-10 06:51:10,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 431 to 429. [2022-01-10 06:51:10,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 429 states, 428 states have (on average 1.355140186915888) internal successors, (580), 428 states have internal predecessors, (580), 0 states have call successors, (0), 0 states 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 06:51:10,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 429 states to 429 states and 580 transitions. [2022-01-10 06:51:10,578 INFO L78 Accepts]: Start accepts. Automaton has 429 states and 580 transitions. Word has length 65 [2022-01-10 06:51:10,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:51:10,578 INFO L470 AbstractCegarLoop]: Abstraction has 429 states and 580 transitions. [2022-01-10 06:51:10,578 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 06:51:10,578 INFO L276 IsEmpty]: Start isEmpty. Operand 429 states and 580 transitions. [2022-01-10 06:51:10,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-01-10 06:51:10,579 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:51:10,579 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, 1] [2022-01-10 06:51:10,591 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2022-01-10 06:51:10,788 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 06:51:10,789 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:51:10,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:51:10,789 INFO L85 PathProgramCache]: Analyzing trace with hash -938437616, now seen corresponding path program 1 times [2022-01-10 06:51:10,789 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:51:10,790 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [338487887] [2022-01-10 06:51:10,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:51:10,790 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:51:10,790 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:51:10,791 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:51:10,792 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2022-01-10 06:51:10,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:51:10,845 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-10 06:51:10,847 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:51:11,417 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 9 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 06:51:11,418 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 06:51:11,809 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 9 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 06:51:11,809 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:51:11,809 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [338487887] [2022-01-10 06:51:11,809 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [338487887] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 06:51:11,809 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 06:51:11,809 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2022-01-10 06:51:11,810 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [906967509] [2022-01-10 06:51:11,810 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 06:51:11,810 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-10 06:51:11,810 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:51:11,811 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-10 06:51:11,811 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2022-01-10 06:51:11,811 INFO L87 Difference]: Start difference. First operand 429 states and 580 transitions. Second operand has 16 states, 16 states have (on average 7.0625) internal successors, (113), 15 states have internal predecessors, (113), 0 states have call successors, (0), 0 states 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 06:51:11,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:51:11,924 INFO L93 Difference]: Finished difference Result 779 states and 1073 transitions. [2022-01-10 06:51:11,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-10 06:51:11,925 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 7.0625) internal successors, (113), 15 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have 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 06:51:11,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:51:11,927 INFO L225 Difference]: With dead ends: 779 [2022-01-10 06:51:11,927 INFO L226 Difference]: Without dead ends: 429 [2022-01-10 06:51:11,928 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=81, Invalid=299, Unknown=0, NotChecked=0, Total=380 [2022-01-10 06:51:11,928 INFO L933 BasicCegarLoop]: 65 mSDtfsCounter, 65 mSDsluCounter, 536 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 601 SdHoareTripleChecker+Invalid, 78 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 53 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 06:51:11,929 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [65 Valid, 601 Invalid, 78 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 22 Invalid, 0 Unknown, 53 Unchecked, 0.0s Time] [2022-01-10 06:51:11,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 429 states. [2022-01-10 06:51:11,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 429 to 429. [2022-01-10 06:51:11,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 429 states, 428 states have (on average 1.352803738317757) internal successors, (579), 428 states have internal predecessors, (579), 0 states have call successors, (0), 0 states 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 06:51:11,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 429 states to 429 states and 579 transitions. [2022-01-10 06:51:11,949 INFO L78 Accepts]: Start accepts. Automaton has 429 states and 579 transitions. Word has length 65 [2022-01-10 06:51:11,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:51:11,949 INFO L470 AbstractCegarLoop]: Abstraction has 429 states and 579 transitions. [2022-01-10 06:51:11,949 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 7.0625) internal successors, (113), 15 states have internal predecessors, (113), 0 states have call successors, (0), 0 states 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 06:51:11,950 INFO L276 IsEmpty]: Start isEmpty. Operand 429 states and 579 transitions. [2022-01-10 06:51:11,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-01-10 06:51:11,951 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:51:11,951 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, 1] [2022-01-10 06:51:11,963 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 06:51:12,152 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 06:51:12,152 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:51:12,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:51:12,153 INFO L85 PathProgramCache]: Analyzing trace with hash -1647967150, now seen corresponding path program 1 times [2022-01-10 06:51:12,153 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:51:12,153 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2051815174] [2022-01-10 06:51:12,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:51:12,153 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:51:12,153 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:51:12,155 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:51:12,157 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2022-01-10 06:51:12,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:51:12,212 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 5 conjunts are in the unsatisfiable core [2022-01-10 06:51:12,213 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:51:12,462 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-01-10 06:51:12,462 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:51:12,463 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:51:12,463 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2051815174] [2022-01-10 06:51:12,463 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2051815174] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:51:12,463 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:51:12,463 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-10 06:51:12,463 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [146503574] [2022-01-10 06:51:12,463 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:51:12,463 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-10 06:51:12,464 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:51:12,464 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-10 06:51:12,464 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-01-10 06:51:12,464 INFO L87 Difference]: Start difference. First operand 429 states and 579 transitions. Second operand has 6 states, 6 states have (on average 10.333333333333334) internal successors, (62), 5 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 06:51:12,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:51:12,506 INFO L93 Difference]: Finished difference Result 792 states and 1085 transitions. [2022-01-10 06:51:12,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-10 06:51:12,507 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 10.333333333333334) internal successors, (62), 5 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2022-01-10 06:51:12,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:51:12,508 INFO L225 Difference]: With dead ends: 792 [2022-01-10 06:51:12,508 INFO L226 Difference]: Without dead ends: 429 [2022-01-10 06:51:12,509 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-01-10 06:51:12,510 INFO L933 BasicCegarLoop]: 70 mSDtfsCounter, 14 mSDsluCounter, 143 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 213 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 26 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 06:51:12,510 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 213 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 17 Invalid, 0 Unknown, 26 Unchecked, 0.0s Time] [2022-01-10 06:51:12,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 429 states. [2022-01-10 06:51:12,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 429 to 429. [2022-01-10 06:51:12,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 429 states, 428 states have (on average 1.3504672897196262) internal successors, (578), 428 states have internal predecessors, (578), 0 states have call successors, (0), 0 states 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 06:51:12,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 429 states to 429 states and 578 transitions. [2022-01-10 06:51:12,528 INFO L78 Accepts]: Start accepts. Automaton has 429 states and 578 transitions. Word has length 65 [2022-01-10 06:51:12,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:51:12,529 INFO L470 AbstractCegarLoop]: Abstraction has 429 states and 578 transitions. [2022-01-10 06:51:12,529 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.333333333333334) internal successors, (62), 5 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 06:51:12,529 INFO L276 IsEmpty]: Start isEmpty. Operand 429 states and 578 transitions. [2022-01-10 06:51:12,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-01-10 06:51:12,532 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:51:12,532 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, 1] [2022-01-10 06:51:12,543 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (14)] Ended with exit code 0 [2022-01-10 06:51:12,741 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 06:51:12,741 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:51:12,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:51:12,742 INFO L85 PathProgramCache]: Analyzing trace with hash -916049070, now seen corresponding path program 1 times [2022-01-10 06:51:12,742 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:51:12,742 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [629921758] [2022-01-10 06:51:12,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:51:12,742 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:51:12,742 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:51:12,743 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:51:12,744 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2022-01-10 06:51:12,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:51:12,791 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 5 conjunts are in the unsatisfiable core [2022-01-10 06:51:12,793 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:51:13,052 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-01-10 06:51:13,052 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:51:13,052 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:51:13,053 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [629921758] [2022-01-10 06:51:13,053 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [629921758] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:51:13,053 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:51:13,053 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-10 06:51:13,053 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1426876215] [2022-01-10 06:51:13,053 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:51:13,053 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-10 06:51:13,053 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:51:13,054 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-10 06:51:13,054 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-01-10 06:51:13,054 INFO L87 Difference]: Start difference. First operand 429 states and 578 transitions. Second operand has 6 states, 6 states have (on average 10.166666666666666) 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 06:51:13,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:51:13,093 INFO L93 Difference]: Finished difference Result 796 states and 1089 transitions. [2022-01-10 06:51:13,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-10 06:51:13,094 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 10.166666666666666) 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 65 [2022-01-10 06:51:13,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:51:13,095 INFO L225 Difference]: With dead ends: 796 [2022-01-10 06:51:13,095 INFO L226 Difference]: Without dead ends: 429 [2022-01-10 06:51:13,096 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-01-10 06:51:13,097 INFO L933 BasicCegarLoop]: 73 mSDtfsCounter, 25 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 149 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 13 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 06:51:13,097 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [25 Valid, 149 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 16 Invalid, 0 Unknown, 13 Unchecked, 0.0s Time] [2022-01-10 06:51:13,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 429 states. [2022-01-10 06:51:13,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 429 to 429. [2022-01-10 06:51:13,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 429 states, 428 states have (on average 1.3481308411214954) internal successors, (577), 428 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 06:51:13,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 429 states to 429 states and 577 transitions. [2022-01-10 06:51:13,123 INFO L78 Accepts]: Start accepts. Automaton has 429 states and 577 transitions. Word has length 65 [2022-01-10 06:51:13,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:51:13,124 INFO L470 AbstractCegarLoop]: Abstraction has 429 states and 577 transitions. [2022-01-10 06:51:13,124 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.166666666666666) 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 06:51:13,124 INFO L276 IsEmpty]: Start isEmpty. Operand 429 states and 577 transitions. [2022-01-10 06:51:13,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-01-10 06:51:13,124 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:51:13,125 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, 1] [2022-01-10 06:51:13,137 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 06:51:13,333 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 06:51:13,333 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:51:13,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:51:13,334 INFO L85 PathProgramCache]: Analyzing trace with hash -1151933870, now seen corresponding path program 1 times [2022-01-10 06:51:13,334 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:51:13,334 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [571709650] [2022-01-10 06:51:13,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:51:13,334 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:51:13,334 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:51:13,335 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:51:13,336 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2022-01-10 06:51:13,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:51:13,385 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 5 conjunts are in the unsatisfiable core [2022-01-10 06:51:13,386 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:51:13,610 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-01-10 06:51:13,611 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:51:13,611 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:51:13,611 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [571709650] [2022-01-10 06:51:13,611 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [571709650] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:51:13,611 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:51:13,611 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-10 06:51:13,611 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1708658267] [2022-01-10 06:51:13,611 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:51:13,612 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-10 06:51:13,612 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:51:13,613 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-10 06:51:13,613 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-01-10 06:51:13,613 INFO L87 Difference]: Start difference. First operand 429 states and 577 transitions. Second operand has 6 states, 6 states have (on average 10.0) 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 06:51:13,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:51:13,668 INFO L93 Difference]: Finished difference Result 779 states and 1070 transitions. [2022-01-10 06:51:13,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-10 06:51:13,668 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 10.0) 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 65 [2022-01-10 06:51:13,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:51:13,670 INFO L225 Difference]: With dead ends: 779 [2022-01-10 06:51:13,670 INFO L226 Difference]: Without dead ends: 408 [2022-01-10 06:51:13,671 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-01-10 06:51:13,672 INFO L933 BasicCegarLoop]: 76 mSDtfsCounter, 18 mSDsluCounter, 176 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 252 SdHoareTripleChecker+Invalid, 90 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 49 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 06:51:13,673 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 252 Invalid, 90 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 40 Invalid, 0 Unknown, 49 Unchecked, 0.0s Time] [2022-01-10 06:51:13,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 408 states. [2022-01-10 06:51:13,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 408 to 408. [2022-01-10 06:51:13,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 408 states, 407 states have (on average 1.3587223587223587) internal successors, (553), 407 states have internal predecessors, (553), 0 states have call successors, (0), 0 states 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 06:51:13,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 408 states to 408 states and 553 transitions. [2022-01-10 06:51:13,687 INFO L78 Accepts]: Start accepts. Automaton has 408 states and 553 transitions. Word has length 65 [2022-01-10 06:51:13,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:51:13,688 INFO L470 AbstractCegarLoop]: Abstraction has 408 states and 553 transitions. [2022-01-10 06:51:13,688 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.0) 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 06:51:13,688 INFO L276 IsEmpty]: Start isEmpty. Operand 408 states and 553 transitions. [2022-01-10 06:51:13,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-01-10 06:51:13,688 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:51:13,689 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, 1, 1] [2022-01-10 06:51:13,704 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2022-01-10 06:51:13,897 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 06:51:13,898 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:51:13,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:51:13,898 INFO L85 PathProgramCache]: Analyzing trace with hash 1375533832, now seen corresponding path program 1 times [2022-01-10 06:51:13,898 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:51:13,899 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1685357545] [2022-01-10 06:51:13,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:51:13,899 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:51:13,899 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:51:13,900 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:51:13,902 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2022-01-10 06:51:13,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:51:13,955 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-10 06:51:13,957 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:51:14,752 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 06:51:14,753 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 06:51:15,067 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 06:51:15,067 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:51:15,068 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1685357545] [2022-01-10 06:51:15,068 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1685357545] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 06:51:15,068 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 06:51:15,068 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2022-01-10 06:51:15,068 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [22354868] [2022-01-10 06:51:15,068 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 06:51:15,068 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-10 06:51:15,068 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:51:15,069 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-10 06:51:15,069 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2022-01-10 06:51:15,069 INFO L87 Difference]: Start difference. First operand 408 states and 553 transitions. Second operand has 16 states, 16 states have (on average 7.8125) internal successors, (125), 15 states have internal predecessors, (125), 0 states have call successors, (0), 0 states 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 06:51:15,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:51:15,179 INFO L93 Difference]: Finished difference Result 772 states and 1070 transitions. [2022-01-10 06:51:15,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-10 06:51:15,179 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 7.8125) internal successors, (125), 15 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 66 [2022-01-10 06:51:15,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:51:15,181 INFO L225 Difference]: With dead ends: 772 [2022-01-10 06:51:15,181 INFO L226 Difference]: Without dead ends: 422 [2022-01-10 06:51:15,181 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 117 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=79, Invalid=301, Unknown=0, NotChecked=0, Total=380 [2022-01-10 06:51:15,182 INFO L933 BasicCegarLoop]: 64 mSDtfsCounter, 64 mSDsluCounter, 625 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 689 SdHoareTripleChecker+Invalid, 106 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 74 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 06:51:15,182 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [64 Valid, 689 Invalid, 106 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 30 Invalid, 0 Unknown, 74 Unchecked, 0.0s Time] [2022-01-10 06:51:15,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 422 states. [2022-01-10 06:51:15,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 422 to 420. [2022-01-10 06:51:15,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 420 states, 419 states have (on average 1.3627684964200477) internal successors, (571), 419 states have internal predecessors, (571), 0 states have call successors, (0), 0 states 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 06:51:15,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 420 states to 420 states and 571 transitions. [2022-01-10 06:51:15,197 INFO L78 Accepts]: Start accepts. Automaton has 420 states and 571 transitions. Word has length 66 [2022-01-10 06:51:15,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:51:15,197 INFO L470 AbstractCegarLoop]: Abstraction has 420 states and 571 transitions. [2022-01-10 06:51:15,197 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 7.8125) internal successors, (125), 15 states have internal predecessors, (125), 0 states have call successors, (0), 0 states 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 06:51:15,197 INFO L276 IsEmpty]: Start isEmpty. Operand 420 states and 571 transitions. [2022-01-10 06:51:15,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-01-10 06:51:15,198 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:51:15,198 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, 1, 1, 1, 1, 1] [2022-01-10 06:51:15,208 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2022-01-10 06:51:15,406 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 06:51:15,407 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:51:15,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:51:15,407 INFO L85 PathProgramCache]: Analyzing trace with hash -1701448066, now seen corresponding path program 1 times [2022-01-10 06:51:15,408 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:51:15,408 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1956008284] [2022-01-10 06:51:15,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:51:15,408 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:51:15,408 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:51:15,409 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:51:15,412 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2022-01-10 06:51:15,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:51:15,465 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-10 06:51:15,466 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:51:15,555 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 06:51:15,555 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:51:15,555 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:51:15,556 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1956008284] [2022-01-10 06:51:15,556 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1956008284] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:51:15,556 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:51:15,556 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 06:51:15,556 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1070264352] [2022-01-10 06:51:15,556 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:51:15,556 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 06:51:15,556 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:51:15,556 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 06:51:15,557 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 06:51:15,557 INFO L87 Difference]: Start difference. First operand 420 states and 571 transitions. Second operand has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 06:51:15,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:51:15,576 INFO L93 Difference]: Finished difference Result 598 states and 819 transitions. [2022-01-10 06:51:15,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 06:51:15,576 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 66 [2022-01-10 06:51:15,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:51:15,577 INFO L225 Difference]: With dead ends: 598 [2022-01-10 06:51:15,577 INFO L226 Difference]: Without dead ends: 248 [2022-01-10 06:51:15,578 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 64 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 06:51:15,578 INFO L933 BasicCegarLoop]: 91 mSDtfsCounter, 23 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 140 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 06:51:15,579 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 140 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 06:51:15,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2022-01-10 06:51:15,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 246. [2022-01-10 06:51:15,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 246 states, 245 states have (on average 1.3061224489795917) internal successors, (320), 245 states have internal predecessors, (320), 0 states have call successors, (0), 0 states 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 06:51:15,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 246 states to 246 states and 320 transitions. [2022-01-10 06:51:15,587 INFO L78 Accepts]: Start accepts. Automaton has 246 states and 320 transitions. Word has length 66 [2022-01-10 06:51:15,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:51:15,587 INFO L470 AbstractCegarLoop]: Abstraction has 246 states and 320 transitions. [2022-01-10 06:51:15,588 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 06:51:15,588 INFO L276 IsEmpty]: Start isEmpty. Operand 246 states and 320 transitions. [2022-01-10 06:51:15,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-01-10 06:51:15,588 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:51:15,588 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, 1, 1, 1] [2022-01-10 06:51:15,596 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 06:51:15,797 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 06:51:15,797 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:51:15,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:51:15,797 INFO L85 PathProgramCache]: Analyzing trace with hash -2090934393, now seen corresponding path program 1 times [2022-01-10 06:51:15,798 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:51:15,798 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1198632178] [2022-01-10 06:51:15,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:51:15,798 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:51:15,798 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:51:15,799 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 06:51:15,800 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 06:51:15,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:51:15,850 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-10 06:51:15,851 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:51:16,113 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-10 06:51:16,113 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:51:16,114 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:51:16,114 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1198632178] [2022-01-10 06:51:16,114 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1198632178] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:51:16,114 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:51:16,114 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-10 06:51:16,114 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [206806745] [2022-01-10 06:51:16,114 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:51:16,114 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 06:51:16,114 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:51:16,115 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 06:51:16,115 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-01-10 06:51:16,115 INFO L87 Difference]: Start difference. First operand 246 states and 320 transitions. Second operand has 5 states, 5 states have (on average 12.8) internal successors, (64), 5 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 06:51:16,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:51:16,171 INFO L93 Difference]: Finished difference Result 490 states and 654 transitions. [2022-01-10 06:51:16,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-10 06:51:16,171 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 12.8) internal successors, (64), 5 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2022-01-10 06:51:16,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:51:16,172 INFO L225 Difference]: With dead ends: 490 [2022-01-10 06:51:16,173 INFO L226 Difference]: Without dead ends: 314 [2022-01-10 06:51:16,173 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 63 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 06:51:16,174 INFO L933 BasicCegarLoop]: 137 mSDtfsCounter, 193 mSDsluCounter, 170 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 193 SdHoareTripleChecker+Valid, 307 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 06:51:16,174 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [193 Valid, 307 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 06:51:16,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 314 states. [2022-01-10 06:51:16,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 314 to 246. [2022-01-10 06:51:16,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 246 states, 245 states have (on average 1.2816326530612245) internal successors, (314), 245 states have internal predecessors, (314), 0 states have call successors, (0), 0 states 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 06:51:16,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 246 states to 246 states and 314 transitions. [2022-01-10 06:51:16,184 INFO L78 Accepts]: Start accepts. Automaton has 246 states and 314 transitions. Word has length 67 [2022-01-10 06:51:16,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:51:16,184 INFO L470 AbstractCegarLoop]: Abstraction has 246 states and 314 transitions. [2022-01-10 06:51:16,184 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.8) internal successors, (64), 5 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 06:51:16,184 INFO L276 IsEmpty]: Start isEmpty. Operand 246 states and 314 transitions. [2022-01-10 06:51:16,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-01-10 06:51:16,184 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:51:16,185 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, 1, 1, 1] [2022-01-10 06:51:16,196 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 06:51:16,393 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 06:51:16,394 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:51:16,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:51:16,394 INFO L85 PathProgramCache]: Analyzing trace with hash -588575286, now seen corresponding path program 1 times [2022-01-10 06:51:16,394 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:51:16,395 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1786558070] [2022-01-10 06:51:16,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:51:16,395 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:51:16,395 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:51:16,396 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 06:51:16,399 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 06:51:16,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:51:16,449 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-10 06:51:16,451 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:51:16,724 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-10 06:51:16,724 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:51:16,724 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:51:16,725 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1786558070] [2022-01-10 06:51:16,725 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1786558070] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:51:16,725 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:51:16,725 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-10 06:51:16,725 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1408468806] [2022-01-10 06:51:16,725 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:51:16,725 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 06:51:16,725 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:51:16,726 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 06:51:16,726 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-01-10 06:51:16,726 INFO L87 Difference]: Start difference. First operand 246 states and 314 transitions. Second operand has 5 states, 5 states have (on average 13.0) internal successors, (65), 5 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 06:51:16,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:51:16,780 INFO L93 Difference]: Finished difference Result 432 states and 571 transitions. [2022-01-10 06:51:16,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-10 06:51:16,780 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.0) internal successors, (65), 5 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2022-01-10 06:51:16,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:51:16,781 INFO L225 Difference]: With dead ends: 432 [2022-01-10 06:51:16,781 INFO L226 Difference]: Without dead ends: 372 [2022-01-10 06:51:16,782 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 63 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 06:51:16,782 INFO L933 BasicCegarLoop]: 144 mSDtfsCounter, 189 mSDsluCounter, 171 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 189 SdHoareTripleChecker+Valid, 315 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 06:51:16,783 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [189 Valid, 315 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 06:51:16,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 372 states. [2022-01-10 06:51:16,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 372 to 308. [2022-01-10 06:51:16,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 308 states, 307 states have (on average 1.286644951140065) internal successors, (395), 307 states have internal predecessors, (395), 0 states have call successors, (0), 0 states 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 06:51:16,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 308 states to 308 states and 395 transitions. [2022-01-10 06:51:16,794 INFO L78 Accepts]: Start accepts. Automaton has 308 states and 395 transitions. Word has length 67 [2022-01-10 06:51:16,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:51:16,795 INFO L470 AbstractCegarLoop]: Abstraction has 308 states and 395 transitions. [2022-01-10 06:51:16,795 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.0) internal successors, (65), 5 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 06:51:16,795 INFO L276 IsEmpty]: Start isEmpty. Operand 308 states and 395 transitions. [2022-01-10 06:51:16,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-01-10 06:51:16,795 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:51:16,795 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, 1, 1, 1] [2022-01-10 06:51:16,804 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 06:51:17,003 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 06:51:17,004 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:51:17,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:51:17,004 INFO L85 PathProgramCache]: Analyzing trace with hash -1944039065, now seen corresponding path program 1 times [2022-01-10 06:51:17,004 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:51:17,005 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [636503040] [2022-01-10 06:51:17,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:51:17,005 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:51:17,005 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:51:17,006 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 06:51:17,006 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 06:51:17,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:51:17,055 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-10 06:51:17,056 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:51:17,300 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-10 06:51:17,300 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:51:17,300 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:51:17,300 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [636503040] [2022-01-10 06:51:17,300 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [636503040] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:51:17,300 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:51:17,301 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-10 06:51:17,301 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [401461732] [2022-01-10 06:51:17,301 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:51:17,301 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 06:51:17,301 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:51:17,302 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 06:51:17,302 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-01-10 06:51:17,302 INFO L87 Difference]: Start difference. First operand 308 states and 395 transitions. Second operand has 5 states, 5 states have (on average 13.2) internal successors, (66), 5 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 06:51:17,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:51:17,368 INFO L93 Difference]: Finished difference Result 494 states and 652 transitions. [2022-01-10 06:51:17,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-10 06:51:17,369 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.2) internal successors, (66), 5 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2022-01-10 06:51:17,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:51:17,370 INFO L225 Difference]: With dead ends: 494 [2022-01-10 06:51:17,370 INFO L226 Difference]: Without dead ends: 434 [2022-01-10 06:51:17,371 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 63 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 06:51:17,371 INFO L933 BasicCegarLoop]: 141 mSDtfsCounter, 166 mSDsluCounter, 222 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 166 SdHoareTripleChecker+Valid, 363 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 06:51:17,371 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [166 Valid, 363 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-10 06:51:17,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 434 states. [2022-01-10 06:51:17,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 434 to 370. [2022-01-10 06:51:17,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 370 states, 369 states have (on average 1.2899728997289972) internal successors, (476), 369 states have internal predecessors, (476), 0 states have call successors, (0), 0 states 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 06:51:17,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 370 states to 370 states and 476 transitions. [2022-01-10 06:51:17,385 INFO L78 Accepts]: Start accepts. Automaton has 370 states and 476 transitions. Word has length 67 [2022-01-10 06:51:17,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:51:17,385 INFO L470 AbstractCegarLoop]: Abstraction has 370 states and 476 transitions. [2022-01-10 06:51:17,385 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.2) internal successors, (66), 5 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 06:51:17,385 INFO L276 IsEmpty]: Start isEmpty. Operand 370 states and 476 transitions. [2022-01-10 06:51:17,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-01-10 06:51:17,386 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:51:17,386 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, 1, 1, 1, 1] [2022-01-10 06:51:17,394 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 06:51:17,594 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 06:51:17,594 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:51:17,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:51:17,594 INFO L85 PathProgramCache]: Analyzing trace with hash 1730655410, now seen corresponding path program 1 times [2022-01-10 06:51:17,595 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:51:17,595 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1212682960] [2022-01-10 06:51:17,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:51:17,595 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:51:17,595 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:51:17,596 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 06:51:17,598 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 06:51:17,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:51:17,644 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 24 conjunts are in the unsatisfiable core [2022-01-10 06:51:17,645 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:51:19,497 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 06:51:19,497 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 06:51:20,538 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 06:51:20,538 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:51:20,538 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1212682960] [2022-01-10 06:51:20,538 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1212682960] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 06:51:20,538 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 06:51:20,539 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 39 [2022-01-10 06:51:20,539 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1600300602] [2022-01-10 06:51:20,539 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 06:51:20,539 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-01-10 06:51:20,539 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:51:20,540 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-01-10 06:51:20,540 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=1249, Unknown=0, NotChecked=0, Total=1482 [2022-01-10 06:51:20,541 INFO L87 Difference]: Start difference. First operand 370 states and 476 transitions. Second operand has 39 states, 39 states have (on average 3.230769230769231) internal successors, (126), 39 states have internal predecessors, (126), 0 states have call successors, (0), 0 states 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 06:51:21,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:51:21,097 INFO L93 Difference]: Finished difference Result 621 states and 799 transitions. [2022-01-10 06:51:21,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-01-10 06:51:21,098 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 3.230769230769231) internal successors, (126), 39 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 68 [2022-01-10 06:51:21,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:51:21,099 INFO L225 Difference]: With dead ends: 621 [2022-01-10 06:51:21,099 INFO L226 Difference]: Without dead ends: 499 [2022-01-10 06:51:21,100 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 515 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=305, Invalid=1417, Unknown=0, NotChecked=0, Total=1722 [2022-01-10 06:51:21,102 INFO L933 BasicCegarLoop]: 84 mSDtfsCounter, 205 mSDsluCounter, 1042 mSDsCounter, 0 mSdLazyCounter, 277 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 205 SdHoareTripleChecker+Valid, 1126 SdHoareTripleChecker+Invalid, 392 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 277 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 93 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-10 06:51:21,102 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [205 Valid, 1126 Invalid, 392 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 277 Invalid, 0 Unknown, 93 Unchecked, 0.2s Time] [2022-01-10 06:51:21,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 499 states. [2022-01-10 06:51:21,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 499 to 376. [2022-01-10 06:51:21,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 376 states, 375 states have (on average 1.288) internal successors, (483), 375 states have internal predecessors, (483), 0 states have call successors, (0), 0 states 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 06:51:21,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 376 states to 376 states and 483 transitions. [2022-01-10 06:51:21,119 INFO L78 Accepts]: Start accepts. Automaton has 376 states and 483 transitions. Word has length 68 [2022-01-10 06:51:21,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:51:21,119 INFO L470 AbstractCegarLoop]: Abstraction has 376 states and 483 transitions. [2022-01-10 06:51:21,119 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 3.230769230769231) internal successors, (126), 39 states have internal predecessors, (126), 0 states have call successors, (0), 0 states 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 06:51:21,119 INFO L276 IsEmpty]: Start isEmpty. Operand 376 states and 483 transitions. [2022-01-10 06:51:21,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-01-10 06:51:21,120 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:51:21,120 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, 1, 1, 1, 1] [2022-01-10 06:51:21,129 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 06:51:21,328 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 06:51:21,329 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:51:21,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:51:21,329 INFO L85 PathProgramCache]: Analyzing trace with hash -1634016075, now seen corresponding path program 1 times [2022-01-10 06:51:21,330 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:51:21,330 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2142016333] [2022-01-10 06:51:21,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:51:21,330 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:51:21,330 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:51:21,331 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 06:51:21,331 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 06:51:21,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:51:21,375 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 24 conjunts are in the unsatisfiable core [2022-01-10 06:51:21,377 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:51:22,808 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 9 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 06:51:22,808 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 06:51:23,581 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 06:51:23,581 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:51:23,581 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2142016333] [2022-01-10 06:51:23,581 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2142016333] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 06:51:23,581 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 06:51:23,581 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 35 [2022-01-10 06:51:23,582 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1467706985] [2022-01-10 06:51:23,582 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 06:51:23,582 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-01-10 06:51:23,582 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:51:23,583 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-01-10 06:51:23,583 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=205, Invalid=985, Unknown=0, NotChecked=0, Total=1190 [2022-01-10 06:51:23,583 INFO L87 Difference]: Start difference. First operand 376 states and 483 transitions. Second operand has 35 states, 35 states have (on average 3.6) internal successors, (126), 35 states have internal predecessors, (126), 0 states have call successors, (0), 0 states 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 06:51:23,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:51:23,933 INFO L93 Difference]: Finished difference Result 629 states and 806 transitions. [2022-01-10 06:51:23,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-01-10 06:51:23,936 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 3.6) internal successors, (126), 35 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 68 [2022-01-10 06:51:23,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:51:23,938 INFO L225 Difference]: With dead ends: 629 [2022-01-10 06:51:23,938 INFO L226 Difference]: Without dead ends: 497 [2022-01-10 06:51:23,939 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 411 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=262, Invalid=1144, Unknown=0, NotChecked=0, Total=1406 [2022-01-10 06:51:23,939 INFO L933 BasicCegarLoop]: 85 mSDtfsCounter, 175 mSDsluCounter, 873 mSDsCounter, 0 mSdLazyCounter, 252 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 175 SdHoareTripleChecker+Valid, 958 SdHoareTripleChecker+Invalid, 354 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 252 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 85 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-10 06:51:23,939 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [175 Valid, 958 Invalid, 354 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 252 Invalid, 0 Unknown, 85 Unchecked, 0.2s Time] [2022-01-10 06:51:23,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 497 states. [2022-01-10 06:51:23,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 497 to 362. [2022-01-10 06:51:23,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 362 states, 361 states have (on average 1.290858725761773) internal successors, (466), 361 states have internal predecessors, (466), 0 states have call successors, (0), 0 states 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 06:51:23,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 362 states to 362 states and 466 transitions. [2022-01-10 06:51:23,955 INFO L78 Accepts]: Start accepts. Automaton has 362 states and 466 transitions. Word has length 68 [2022-01-10 06:51:23,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:51:23,955 INFO L470 AbstractCegarLoop]: Abstraction has 362 states and 466 transitions. [2022-01-10 06:51:23,955 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 3.6) internal successors, (126), 35 states have internal predecessors, (126), 0 states have call successors, (0), 0 states 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 06:51:23,955 INFO L276 IsEmpty]: Start isEmpty. Operand 362 states and 466 transitions. [2022-01-10 06:51:23,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-01-10 06:51:23,956 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:51:23,956 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, 1, 1, 1, 1] [2022-01-10 06:51:23,964 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 06:51:24,164 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 06:51:24,164 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:51:24,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:51:24,165 INFO L85 PathProgramCache]: Analyzing trace with hash 867126198, now seen corresponding path program 1 times [2022-01-10 06:51:24,165 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:51:24,165 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1583104532] [2022-01-10 06:51:24,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:51:24,166 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:51:24,166 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:51:24,167 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 06:51:24,168 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 06:51:24,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:51:24,235 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 3 conjunts are in the unsatisfiable core [2022-01-10 06:51:24,237 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:51:24,405 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-10 06:51:24,405 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 06:51:24,535 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-10 06:51:24,535 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:51:24,535 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1583104532] [2022-01-10 06:51:24,535 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1583104532] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 06:51:24,535 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 06:51:24,535 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2022-01-10 06:51:24,535 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1449095647] [2022-01-10 06:51:24,535 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 06:51:24,536 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-10 06:51:24,536 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:51:24,536 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-10 06:51:24,536 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-01-10 06:51:24,536 INFO L87 Difference]: Start difference. First operand 362 states and 466 transitions. Second operand has 6 states, 6 states have (on average 21.333333333333332) internal successors, (128), 6 states have internal predecessors, (128), 0 states have call successors, (0), 0 states 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 06:51:24,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:51:24,602 INFO L93 Difference]: Finished difference Result 1156 states and 1509 transitions. [2022-01-10 06:51:24,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-10 06:51:24,603 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 21.333333333333332) internal successors, (128), 6 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 69 [2022-01-10 06:51:24,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:51:24,605 INFO L225 Difference]: With dead ends: 1156 [2022-01-10 06:51:24,605 INFO L226 Difference]: Without dead ends: 864 [2022-01-10 06:51:24,606 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 132 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 06:51:24,606 INFO L933 BasicCegarLoop]: 103 mSDtfsCounter, 151 mSDsluCounter, 327 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 151 SdHoareTripleChecker+Valid, 430 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 24 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 06:51:24,607 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [151 Valid, 430 Invalid, 68 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 34 Invalid, 0 Unknown, 24 Unchecked, 0.0s Time] [2022-01-10 06:51:24,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 864 states. [2022-01-10 06:51:24,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 864 to 761. [2022-01-10 06:51:24,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 761 states, 760 states have (on average 1.2868421052631578) internal successors, (978), 760 states have internal predecessors, (978), 0 states have call successors, (0), 0 states 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 06:51:24,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 761 states to 761 states and 978 transitions. [2022-01-10 06:51:24,640 INFO L78 Accepts]: Start accepts. Automaton has 761 states and 978 transitions. Word has length 69 [2022-01-10 06:51:24,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:51:24,640 INFO L470 AbstractCegarLoop]: Abstraction has 761 states and 978 transitions. [2022-01-10 06:51:24,640 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 21.333333333333332) internal successors, (128), 6 states have internal predecessors, (128), 0 states have call successors, (0), 0 states 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 06:51:24,640 INFO L276 IsEmpty]: Start isEmpty. Operand 761 states and 978 transitions. [2022-01-10 06:51:24,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-01-10 06:51:24,641 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:51:24,641 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, 1, 1, 1, 1] [2022-01-10 06:51:24,651 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (24)] Forceful destruction successful, exit code 0 [2022-01-10 06:51:24,849 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 06:51:24,849 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:51:24,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:51:24,850 INFO L85 PathProgramCache]: Analyzing trace with hash -692464161, now seen corresponding path program 1 times [2022-01-10 06:51:24,850 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:51:24,850 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1951247493] [2022-01-10 06:51:24,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:51:24,850 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:51:24,850 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:51:24,851 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 06:51:24,852 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 06:51:24,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:51:24,895 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 22 conjunts are in the unsatisfiable core [2022-01-10 06:51:24,897 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:51:27,308 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 06:51:27,308 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 06:51:28,920 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 06:51:28,920 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:51:28,920 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1951247493] [2022-01-10 06:51:28,920 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1951247493] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 06:51:28,920 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 06:51:28,920 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 18] total 37 [2022-01-10 06:51:28,920 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2023790908] [2022-01-10 06:51:28,921 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 06:51:28,921 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-01-10 06:51:28,921 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:51:28,921 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-01-10 06:51:28,922 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=1161, Unknown=0, NotChecked=0, Total=1332 [2022-01-10 06:51:28,922 INFO L87 Difference]: Start difference. First operand 761 states and 978 transitions. Second operand has 37 states, 37 states have (on average 3.4054054054054053) internal successors, (126), 37 states have internal predecessors, (126), 0 states have call successors, (0), 0 states 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 06:51:29,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:51:29,275 INFO L93 Difference]: Finished difference Result 1022 states and 1316 transitions. [2022-01-10 06:51:29,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-01-10 06:51:29,275 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 3.4054054054054053) internal successors, (126), 37 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 69 [2022-01-10 06:51:29,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:51:29,277 INFO L225 Difference]: With dead ends: 1022 [2022-01-10 06:51:29,278 INFO L226 Difference]: Without dead ends: 788 [2022-01-10 06:51:29,278 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 425 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=205, Invalid=1277, Unknown=0, NotChecked=0, Total=1482 [2022-01-10 06:51:29,280 INFO L933 BasicCegarLoop]: 58 mSDtfsCounter, 159 mSDsluCounter, 857 mSDsCounter, 0 mSdLazyCounter, 161 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 159 SdHoareTripleChecker+Valid, 915 SdHoareTripleChecker+Invalid, 312 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 161 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 136 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 06:51:29,281 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [159 Valid, 915 Invalid, 312 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 161 Invalid, 0 Unknown, 136 Unchecked, 0.1s Time] [2022-01-10 06:51:29,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 788 states. [2022-01-10 06:51:29,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 788 to 767. [2022-01-10 06:51:29,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 767 states, 766 states have (on average 1.2859007832898173) internal successors, (985), 766 states have internal predecessors, (985), 0 states have call successors, (0), 0 states 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 06:51:29,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 767 states to 767 states and 985 transitions. [2022-01-10 06:51:29,314 INFO L78 Accepts]: Start accepts. Automaton has 767 states and 985 transitions. Word has length 69 [2022-01-10 06:51:29,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:51:29,314 INFO L470 AbstractCegarLoop]: Abstraction has 767 states and 985 transitions. [2022-01-10 06:51:29,314 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 3.4054054054054053) internal successors, (126), 37 states have internal predecessors, (126), 0 states have call successors, (0), 0 states 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 06:51:29,314 INFO L276 IsEmpty]: Start isEmpty. Operand 767 states and 985 transitions. [2022-01-10 06:51:29,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-01-10 06:51:29,315 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:51:29,315 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, 1, 1, 1, 1, 1] [2022-01-10 06:51:29,323 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 06:51:29,523 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 06:51:29,524 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:51:29,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:51:29,524 INFO L85 PathProgramCache]: Analyzing trace with hash -2102394366, now seen corresponding path program 1 times [2022-01-10 06:51:29,525 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:51:29,525 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1229889605] [2022-01-10 06:51:29,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:51:29,525 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:51:29,525 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:51:29,526 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 06:51:29,528 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 06:51:29,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:51:29,581 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-10 06:51:29,583 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:51:31,626 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 06:51:31,626 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 06:51:32,902 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 06:51:32,902 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:51:32,902 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1229889605] [2022-01-10 06:51:32,902 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1229889605] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 06:51:32,902 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 06:51:32,902 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21] total 41 [2022-01-10 06:51:32,902 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [665921360] [2022-01-10 06:51:32,902 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 06:51:32,903 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-01-10 06:51:32,903 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:51:32,903 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-01-10 06:51:32,904 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=1387, Unknown=0, NotChecked=0, Total=1640 [2022-01-10 06:51:32,904 INFO L87 Difference]: Start difference. First operand 767 states and 985 transitions. Second operand has 41 states, 41 states have (on average 3.1219512195121952) internal successors, (128), 41 states have internal predecessors, (128), 0 states have call successors, (0), 0 states 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 06:51:33,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:51:33,449 INFO L93 Difference]: Finished difference Result 1331 states and 1690 transitions. [2022-01-10 06:51:33,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-01-10 06:51:33,450 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 3.1219512195121952) internal successors, (128), 41 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 69 [2022-01-10 06:51:33,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:51:33,452 INFO L225 Difference]: With dead ends: 1331 [2022-01-10 06:51:33,452 INFO L226 Difference]: Without dead ends: 887 [2022-01-10 06:51:33,453 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 595 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=325, Invalid=1567, Unknown=0, NotChecked=0, Total=1892 [2022-01-10 06:51:33,454 INFO L933 BasicCegarLoop]: 90 mSDtfsCounter, 238 mSDsluCounter, 1001 mSDsCounter, 0 mSdLazyCounter, 378 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 238 SdHoareTripleChecker+Valid, 1091 SdHoareTripleChecker+Invalid, 557 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 378 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 156 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-10 06:51:33,454 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [238 Valid, 1091 Invalid, 557 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 378 Invalid, 0 Unknown, 156 Unchecked, 0.3s Time] [2022-01-10 06:51:33,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 887 states. [2022-01-10 06:51:33,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 887 to 644. [2022-01-10 06:51:33,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 644 states, 643 states have (on average 1.2768273716951788) internal successors, (821), 643 states have internal predecessors, (821), 0 states have call successors, (0), 0 states 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 06:51:33,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 644 states to 644 states and 821 transitions. [2022-01-10 06:51:33,488 INFO L78 Accepts]: Start accepts. Automaton has 644 states and 821 transitions. Word has length 69 [2022-01-10 06:51:33,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:51:33,489 INFO L470 AbstractCegarLoop]: Abstraction has 644 states and 821 transitions. [2022-01-10 06:51:33,489 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 3.1219512195121952) internal successors, (128), 41 states have internal predecessors, (128), 0 states have call successors, (0), 0 states 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 06:51:33,489 INFO L276 IsEmpty]: Start isEmpty. Operand 644 states and 821 transitions. [2022-01-10 06:51:33,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-01-10 06:51:33,490 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:51:33,490 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:51:33,498 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 06:51:33,698 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 06:51:33,698 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:51:33,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:51:33,699 INFO L85 PathProgramCache]: Analyzing trace with hash -878889244, now seen corresponding path program 1 times [2022-01-10 06:51:33,699 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:51:33,699 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [718887084] [2022-01-10 06:51:33,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:51:33,699 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:51:33,699 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:51:33,700 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 06:51:33,701 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 06:51:33,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:51:33,750 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 3 conjunts are in the unsatisfiable core [2022-01-10 06:51:33,751 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:51:33,931 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-10 06:51:33,932 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 06:51:34,049 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-10 06:51:34,050 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:51:34,050 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [718887084] [2022-01-10 06:51:34,050 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [718887084] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 06:51:34,050 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 06:51:34,050 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2022-01-10 06:51:34,050 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1244541022] [2022-01-10 06:51:34,050 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 06:51:34,050 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-10 06:51:34,050 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:51:34,051 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-10 06:51:34,051 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-01-10 06:51:34,051 INFO L87 Difference]: Start difference. First operand 644 states and 821 transitions. Second operand has 6 states, 6 states have (on average 21.833333333333332) internal successors, (131), 6 states have internal predecessors, (131), 0 states have call successors, (0), 0 states 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 06:51:34,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:51:34,105 INFO L93 Difference]: Finished difference Result 1214 states and 1559 transitions. [2022-01-10 06:51:34,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-10 06:51:34,107 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 21.833333333333332) internal successors, (131), 6 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 70 [2022-01-10 06:51:34,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:51:34,109 INFO L225 Difference]: With dead ends: 1214 [2022-01-10 06:51:34,109 INFO L226 Difference]: Without dead ends: 729 [2022-01-10 06:51:34,110 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 134 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 06:51:34,110 INFO L933 BasicCegarLoop]: 100 mSDtfsCounter, 122 mSDsluCounter, 265 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 122 SdHoareTripleChecker+Valid, 365 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 25 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 06:51:34,111 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [122 Valid, 365 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 24 Invalid, 0 Unknown, 25 Unchecked, 0.0s Time] [2022-01-10 06:51:34,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 729 states. [2022-01-10 06:51:34,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 729 to 707. [2022-01-10 06:51:34,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 707 states, 706 states have (on average 1.2662889518413598) internal successors, (894), 706 states have internal predecessors, (894), 0 states have call successors, (0), 0 states 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 06:51:34,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 707 states to 707 states and 894 transitions. [2022-01-10 06:51:34,146 INFO L78 Accepts]: Start accepts. Automaton has 707 states and 894 transitions. Word has length 70 [2022-01-10 06:51:34,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:51:34,146 INFO L470 AbstractCegarLoop]: Abstraction has 707 states and 894 transitions. [2022-01-10 06:51:34,147 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 21.833333333333332) internal successors, (131), 6 states have internal predecessors, (131), 0 states have call successors, (0), 0 states 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 06:51:34,147 INFO L276 IsEmpty]: Start isEmpty. Operand 707 states and 894 transitions. [2022-01-10 06:51:34,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-01-10 06:51:34,147 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:51:34,147 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, 1, 1, 1, 1, 1] [2022-01-10 06:51:34,155 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 06:51:34,353 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 06:51:34,353 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:51:34,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:51:34,354 INFO L85 PathProgramCache]: Analyzing trace with hash -1362769912, now seen corresponding path program 1 times [2022-01-10 06:51:34,354 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:51:34,354 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [796744563] [2022-01-10 06:51:34,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:51:34,354 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:51:34,354 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:51:34,356 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 06:51:34,356 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 06:51:34,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:51:34,398 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 9 conjunts are in the unsatisfiable core [2022-01-10 06:51:34,399 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:51:35,208 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 06:51:35,209 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 06:51:35,423 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 06:51:35,423 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:51:35,423 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [796744563] [2022-01-10 06:51:35,423 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [796744563] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 06:51:35,423 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 06:51:35,423 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 17 [2022-01-10 06:51:35,423 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1847825082] [2022-01-10 06:51:35,423 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 06:51:35,424 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-10 06:51:35,424 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:51:35,424 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-10 06:51:35,424 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2022-01-10 06:51:35,425 INFO L87 Difference]: Start difference. First operand 707 states and 894 transitions. Second operand has 17 states, 17 states have (on average 7.294117647058823) internal successors, (124), 17 states have internal predecessors, (124), 0 states have call successors, (0), 0 states 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 06:51:35,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:51:35,495 INFO L93 Difference]: Finished difference Result 899 states and 1142 transitions. [2022-01-10 06:51:35,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-10 06:51:35,496 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 7.294117647058823) internal successors, (124), 17 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 70 [2022-01-10 06:51:35,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:51:35,497 INFO L225 Difference]: With dead ends: 899 [2022-01-10 06:51:35,497 INFO L226 Difference]: Without dead ends: 594 [2022-01-10 06:51:35,497 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 123 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 06:51:35,498 INFO L933 BasicCegarLoop]: 71 mSDtfsCounter, 48 mSDsluCounter, 604 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 675 SdHoareTripleChecker+Invalid, 117 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 55 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 06:51:35,498 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [48 Valid, 675 Invalid, 117 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 58 Invalid, 0 Unknown, 55 Unchecked, 0.0s Time] [2022-01-10 06:51:35,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 594 states. [2022-01-10 06:51:35,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 594 to 582. [2022-01-10 06:51:35,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 582 states, 581 states have (on average 1.2530120481927711) internal successors, (728), 581 states have internal predecessors, (728), 0 states have call successors, (0), 0 states 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 06:51:35,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 582 states to 582 states and 728 transitions. [2022-01-10 06:51:35,538 INFO L78 Accepts]: Start accepts. Automaton has 582 states and 728 transitions. Word has length 70 [2022-01-10 06:51:35,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:51:35,538 INFO L470 AbstractCegarLoop]: Abstraction has 582 states and 728 transitions. [2022-01-10 06:51:35,539 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 7.294117647058823) internal successors, (124), 17 states have internal predecessors, (124), 0 states have call successors, (0), 0 states 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 06:51:35,539 INFO L276 IsEmpty]: Start isEmpty. Operand 582 states and 728 transitions. [2022-01-10 06:51:35,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2022-01-10 06:51:35,539 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:51:35,540 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 3, 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 06:51:35,553 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (28)] Forceful destruction successful, exit code 0 [2022-01-10 06:51:35,748 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 06:51:35,748 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:51:35,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:51:35,749 INFO L85 PathProgramCache]: Analyzing trace with hash -375920816, now seen corresponding path program 1 times [2022-01-10 06:51:35,749 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:51:35,749 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2049157412] [2022-01-10 06:51:35,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:51:35,749 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:51:35,749 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:51:35,750 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 06:51:35,751 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 06:51:35,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:51:35,809 INFO L263 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 13 conjunts are in the unsatisfiable core [2022-01-10 06:51:35,810 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:51:37,036 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 30 proven. 69 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 06:51:37,037 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 06:51:37,503 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 30 proven. 69 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 06:51:37,503 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:51:37,503 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2049157412] [2022-01-10 06:51:37,503 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2049157412] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 06:51:37,504 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 06:51:37,504 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 25 [2022-01-10 06:51:37,504 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [902661840] [2022-01-10 06:51:37,504 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 06:51:37,504 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-10 06:51:37,504 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:51:37,505 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-10 06:51:37,505 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=567, Unknown=0, NotChecked=0, Total=650 [2022-01-10 06:51:37,505 INFO L87 Difference]: Start difference. First operand 582 states and 728 transitions. Second operand has 26 states, 26 states have (on average 8.26923076923077) internal successors, (215), 25 states have internal predecessors, (215), 0 states have call successors, (0), 0 states 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 06:51:37,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:51:37,660 INFO L93 Difference]: Finished difference Result 1094 states and 1375 transitions. [2022-01-10 06:51:37,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-01-10 06:51:37,660 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 8.26923076923077) internal successors, (215), 25 states have internal predecessors, (215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 114 [2022-01-10 06:51:37,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:51:37,662 INFO L225 Difference]: With dead ends: 1094 [2022-01-10 06:51:37,662 INFO L226 Difference]: Without dead ends: 640 [2022-01-10 06:51:37,662 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 230 GetRequests, 202 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 202 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=126, Invalid=744, Unknown=0, NotChecked=0, Total=870 [2022-01-10 06:51:37,663 INFO L933 BasicCegarLoop]: 85 mSDtfsCounter, 110 mSDsluCounter, 1310 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 1395 SdHoareTripleChecker+Invalid, 136 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 96 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 06:51:37,663 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [110 Valid, 1395 Invalid, 136 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 35 Invalid, 0 Unknown, 96 Unchecked, 0.0s Time] [2022-01-10 06:51:37,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 640 states. [2022-01-10 06:51:37,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 640 to 640. [2022-01-10 06:51:37,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 640 states, 639 states have (on average 1.242566510172144) internal successors, (794), 639 states have internal predecessors, (794), 0 states have call successors, (0), 0 states 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 06:51:37,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 640 states to 640 states and 794 transitions. [2022-01-10 06:51:37,692 INFO L78 Accepts]: Start accepts. Automaton has 640 states and 794 transitions. Word has length 114 [2022-01-10 06:51:37,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:51:37,692 INFO L470 AbstractCegarLoop]: Abstraction has 640 states and 794 transitions. [2022-01-10 06:51:37,692 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 8.26923076923077) internal successors, (215), 25 states have internal predecessors, (215), 0 states have call successors, (0), 0 states 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 06:51:37,692 INFO L276 IsEmpty]: Start isEmpty. Operand 640 states and 794 transitions. [2022-01-10 06:51:37,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2022-01-10 06:51:37,694 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:51:37,694 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 3, 3, 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, 1, 1, 1] [2022-01-10 06:51:37,705 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 06:51:37,902 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 06:51:37,903 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:51:37,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:51:37,903 INFO L85 PathProgramCache]: Analyzing trace with hash 1897073410, now seen corresponding path program 1 times [2022-01-10 06:51:37,903 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:51:37,903 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1509229161] [2022-01-10 06:51:37,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:51:37,904 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:51:37,904 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:51:37,905 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 06:51:37,906 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 06:51:37,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:51:37,963 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 13 conjunts are in the unsatisfiable core [2022-01-10 06:51:37,964 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:51:39,361 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 16 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 06:51:39,362 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 06:51:39,722 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 16 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 06:51:39,723 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:51:39,723 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1509229161] [2022-01-10 06:51:39,723 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1509229161] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 06:51:39,723 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 06:51:39,723 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 25 [2022-01-10 06:51:39,723 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [381758812] [2022-01-10 06:51:39,723 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 06:51:39,723 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-10 06:51:39,723 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:51:39,724 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-10 06:51:39,724 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=567, Unknown=0, NotChecked=0, Total=650 [2022-01-10 06:51:39,724 INFO L87 Difference]: Start difference. First operand 640 states and 794 transitions. Second operand has 26 states, 26 states have (on average 8.5) internal successors, (221), 25 states have internal predecessors, (221), 0 states have call successors, (0), 0 states 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 06:51:39,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:51:39,845 INFO L93 Difference]: Finished difference Result 1206 states and 1503 transitions. [2022-01-10 06:51:39,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-01-10 06:51:39,845 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 8.5) internal successors, (221), 25 states have internal predecessors, (221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 114 [2022-01-10 06:51:39,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:51:39,847 INFO L225 Difference]: With dead ends: 1206 [2022-01-10 06:51:39,847 INFO L226 Difference]: Without dead ends: 764 [2022-01-10 06:51:39,848 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 231 GetRequests, 203 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 202 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=113, Invalid=757, Unknown=0, NotChecked=0, Total=870 [2022-01-10 06:51:39,848 INFO L933 BasicCegarLoop]: 88 mSDtfsCounter, 99 mSDsluCounter, 1348 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 1436 SdHoareTripleChecker+Invalid, 124 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 100 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 06:51:39,848 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [99 Valid, 1436 Invalid, 124 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 22 Invalid, 0 Unknown, 100 Unchecked, 0.0s Time] [2022-01-10 06:51:39,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 764 states. [2022-01-10 06:51:39,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 764 to 764. [2022-01-10 06:51:39,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 764 states, 763 states have (on average 1.2293577981651376) internal successors, (938), 763 states have internal predecessors, (938), 0 states have call successors, (0), 0 states 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 06:51:39,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 764 states to 764 states and 938 transitions. [2022-01-10 06:51:39,873 INFO L78 Accepts]: Start accepts. Automaton has 764 states and 938 transitions. Word has length 114 [2022-01-10 06:51:39,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:51:39,873 INFO L470 AbstractCegarLoop]: Abstraction has 764 states and 938 transitions. [2022-01-10 06:51:39,873 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 8.5) internal successors, (221), 25 states have internal predecessors, (221), 0 states have call successors, (0), 0 states 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 06:51:39,873 INFO L276 IsEmpty]: Start isEmpty. Operand 764 states and 938 transitions. [2022-01-10 06:51:39,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2022-01-10 06:51:39,874 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:51:39,874 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 3, 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 06:51:39,881 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 06:51:40,078 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 06:51:40,078 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:51:40,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:51:40,078 INFO L85 PathProgramCache]: Analyzing trace with hash 2033123088, now seen corresponding path program 1 times [2022-01-10 06:51:40,079 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:51:40,079 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [3257021] [2022-01-10 06:51:40,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:51:40,079 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:51:40,079 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:51:40,080 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 06:51:40,080 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 06:51:40,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:51:40,137 INFO L263 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 13 conjunts are in the unsatisfiable core [2022-01-10 06:51:40,139 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:51:41,334 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 39 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 06:51:41,334 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 06:51:41,725 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 39 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 06:51:41,725 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:51:41,725 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [3257021] [2022-01-10 06:51:41,725 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [3257021] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 06:51:41,725 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 06:51:41,725 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 25 [2022-01-10 06:51:41,725 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1566129888] [2022-01-10 06:51:41,725 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 06:51:41,725 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-10 06:51:41,725 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:51:41,726 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-10 06:51:41,726 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=567, Unknown=0, NotChecked=0, Total=650 [2022-01-10 06:51:41,726 INFO L87 Difference]: Start difference. First operand 764 states and 938 transitions. Second operand has 26 states, 26 states have (on average 8.038461538461538) internal successors, (209), 25 states have internal predecessors, (209), 0 states have call successors, (0), 0 states 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 06:51:41,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:51:41,889 INFO L93 Difference]: Finished difference Result 1368 states and 1686 transitions. [2022-01-10 06:51:41,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-01-10 06:51:41,890 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 8.038461538461538) internal successors, (209), 25 states have internal predecessors, (209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 114 [2022-01-10 06:51:41,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:51:41,892 INFO L225 Difference]: With dead ends: 1368 [2022-01-10 06:51:41,892 INFO L226 Difference]: Without dead ends: 908 [2022-01-10 06:51:41,892 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 230 GetRequests, 202 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 201 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=122, Invalid=748, Unknown=0, NotChecked=0, Total=870 [2022-01-10 06:51:41,893 INFO L933 BasicCegarLoop]: 82 mSDtfsCounter, 148 mSDsluCounter, 1017 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 148 SdHoareTripleChecker+Valid, 1099 SdHoareTripleChecker+Invalid, 120 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 71 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 06:51:41,893 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [148 Valid, 1099 Invalid, 120 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 44 Invalid, 0 Unknown, 71 Unchecked, 0.0s Time] [2022-01-10 06:51:41,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 908 states. [2022-01-10 06:51:41,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 908 to 908. [2022-01-10 06:51:41,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 908 states, 907 states have (on average 1.2061742006615215) internal successors, (1094), 907 states have internal predecessors, (1094), 0 states have call successors, (0), 0 states 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 06:51:41,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 908 states to 908 states and 1094 transitions. [2022-01-10 06:51:41,926 INFO L78 Accepts]: Start accepts. Automaton has 908 states and 1094 transitions. Word has length 114 [2022-01-10 06:51:41,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:51:41,926 INFO L470 AbstractCegarLoop]: Abstraction has 908 states and 1094 transitions. [2022-01-10 06:51:41,926 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 8.038461538461538) internal successors, (209), 25 states have internal predecessors, (209), 0 states have call successors, (0), 0 states 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 06:51:41,926 INFO L276 IsEmpty]: Start isEmpty. Operand 908 states and 1094 transitions. [2022-01-10 06:51:41,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2022-01-10 06:51:41,927 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:51:41,928 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 3, 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 06:51:41,935 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (31)] Ended with exit code 0 [2022-01-10 06:51:42,132 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 06:51:42,133 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:51:42,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:51:42,133 INFO L85 PathProgramCache]: Analyzing trace with hash -1219926318, now seen corresponding path program 1 times [2022-01-10 06:51:42,133 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:51:42,133 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1179948586] [2022-01-10 06:51:42,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:51:42,133 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:51:42,133 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:51:42,134 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 06:51:42,135 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 06:51:42,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:51:42,200 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 10 conjunts are in the unsatisfiable core [2022-01-10 06:51:42,202 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:51:43,286 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 60 proven. 32 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-01-10 06:51:43,286 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 06:51:43,658 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 60 proven. 32 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-01-10 06:51:43,658 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:51:43,658 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1179948586] [2022-01-10 06:51:43,658 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1179948586] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 06:51:43,658 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 06:51:43,658 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2022-01-10 06:51:43,658 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [538304824] [2022-01-10 06:51:43,658 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 06:51:43,659 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-10 06:51:43,659 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:51:43,659 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-10 06:51:43,659 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=315, Unknown=0, NotChecked=0, Total=380 [2022-01-10 06:51:43,659 INFO L87 Difference]: Start difference. First operand 908 states and 1094 transitions. Second operand has 20 states, 20 states have (on average 9.45) internal successors, (189), 19 states have internal predecessors, (189), 0 states have call successors, (0), 0 states 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 06:51:43,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:51:43,740 INFO L93 Difference]: Finished difference Result 1407 states and 1733 transitions. [2022-01-10 06:51:43,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-10 06:51:43,740 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 9.45) internal successors, (189), 19 states have internal predecessors, (189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 114 [2022-01-10 06:51:43,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:51:43,742 INFO L225 Difference]: With dead ends: 1407 [2022-01-10 06:51:43,742 INFO L226 Difference]: Without dead ends: 908 [2022-01-10 06:51:43,742 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 228 GetRequests, 208 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=81, Invalid=381, Unknown=0, NotChecked=0, Total=462 [2022-01-10 06:51:43,743 INFO L933 BasicCegarLoop]: 73 mSDtfsCounter, 103 mSDsluCounter, 627 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 700 SdHoareTripleChecker+Invalid, 98 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 59 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 06:51:43,743 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [103 Valid, 700 Invalid, 98 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 36 Invalid, 0 Unknown, 59 Unchecked, 0.0s Time] [2022-01-10 06:51:43,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 908 states. [2022-01-10 06:51:43,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 908 to 908. [2022-01-10 06:51:43,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 908 states, 907 states have (on average 1.2017640573318633) internal successors, (1090), 907 states have internal predecessors, (1090), 0 states have call successors, (0), 0 states 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 06:51:43,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 908 states to 908 states and 1090 transitions. [2022-01-10 06:51:43,776 INFO L78 Accepts]: Start accepts. Automaton has 908 states and 1090 transitions. Word has length 114 [2022-01-10 06:51:43,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:51:43,776 INFO L470 AbstractCegarLoop]: Abstraction has 908 states and 1090 transitions. [2022-01-10 06:51:43,777 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 9.45) internal successors, (189), 19 states have internal predecessors, (189), 0 states have call successors, (0), 0 states 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 06:51:43,777 INFO L276 IsEmpty]: Start isEmpty. Operand 908 states and 1090 transitions. [2022-01-10 06:51:43,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2022-01-10 06:51:43,778 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:51:43,778 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 3, 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 06:51:43,784 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (32)] Ended with exit code 0 [2022-01-10 06:51:43,979 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 06:51:43,979 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:51:43,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:51:43,980 INFO L85 PathProgramCache]: Analyzing trace with hash 2073679314, now seen corresponding path program 1 times [2022-01-10 06:51:43,980 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:51:43,980 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [729995837] [2022-01-10 06:51:43,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:51:43,980 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:51:43,980 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:51:43,981 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 06:51:43,983 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 06:51:44,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:51:44,040 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 10 conjunts are in the unsatisfiable core [2022-01-10 06:51:44,042 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:51:44,999 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 64 proven. 26 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-01-10 06:51:44,999 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 06:51:45,313 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 64 proven. 26 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-01-10 06:51:45,313 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:51:45,313 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [729995837] [2022-01-10 06:51:45,314 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [729995837] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 06:51:45,314 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 06:51:45,314 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2022-01-10 06:51:45,314 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1462259663] [2022-01-10 06:51:45,314 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 06:51:45,314 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-10 06:51:45,314 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:51:45,314 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-10 06:51:45,315 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=315, Unknown=0, NotChecked=0, Total=380 [2022-01-10 06:51:45,315 INFO L87 Difference]: Start difference. First operand 908 states and 1090 transitions. Second operand has 20 states, 20 states have (on average 9.2) internal successors, (184), 19 states have internal predecessors, (184), 0 states have call successors, (0), 0 states 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 06:51:45,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:51:45,443 INFO L93 Difference]: Finished difference Result 1411 states and 1734 transitions. [2022-01-10 06:51:45,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-10 06:51:45,443 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 9.2) internal successors, (184), 19 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 114 [2022-01-10 06:51:45,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:51:45,445 INFO L225 Difference]: With dead ends: 1411 [2022-01-10 06:51:45,445 INFO L226 Difference]: Without dead ends: 908 [2022-01-10 06:51:45,446 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 230 GetRequests, 208 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=104, Invalid=448, Unknown=0, NotChecked=0, Total=552 [2022-01-10 06:51:45,446 INFO L933 BasicCegarLoop]: 72 mSDtfsCounter, 82 mSDsluCounter, 753 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 825 SdHoareTripleChecker+Invalid, 134 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 74 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 06:51:45,446 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [82 Valid, 825 Invalid, 134 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 55 Invalid, 0 Unknown, 74 Unchecked, 0.0s Time] [2022-01-10 06:51:45,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 908 states. [2022-01-10 06:51:45,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 908 to 908. [2022-01-10 06:51:45,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 908 states, 907 states have (on average 1.1973539140022051) internal successors, (1086), 907 states have internal predecessors, (1086), 0 states have call successors, (0), 0 states 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 06:51:45,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 908 states to 908 states and 1086 transitions. [2022-01-10 06:51:45,478 INFO L78 Accepts]: Start accepts. Automaton has 908 states and 1086 transitions. Word has length 114 [2022-01-10 06:51:45,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:51:45,478 INFO L470 AbstractCegarLoop]: Abstraction has 908 states and 1086 transitions. [2022-01-10 06:51:45,478 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 9.2) internal successors, (184), 19 states have internal predecessors, (184), 0 states have call successors, (0), 0 states 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 06:51:45,478 INFO L276 IsEmpty]: Start isEmpty. Operand 908 states and 1086 transitions. [2022-01-10 06:51:45,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2022-01-10 06:51:45,479 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:51:45,479 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 3, 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 06:51:45,485 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 06:51:45,679 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 06:51:45,679 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:51:45,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:51:45,680 INFO L85 PathProgramCache]: Analyzing trace with hash -1273314094, now seen corresponding path program 1 times [2022-01-10 06:51:45,680 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:51:45,680 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2026763496] [2022-01-10 06:51:45,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:51:45,680 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:51:45,680 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:51:45,681 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 06:51:45,682 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 06:51:45,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:51:45,737 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 10 conjunts are in the unsatisfiable core [2022-01-10 06:51:45,739 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:51:46,589 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 68 proven. 20 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-01-10 06:51:46,589 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 06:51:46,978 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 68 proven. 20 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-01-10 06:51:46,979 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:51:46,979 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2026763496] [2022-01-10 06:51:46,979 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2026763496] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 06:51:46,979 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 06:51:46,979 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2022-01-10 06:51:46,979 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1612487394] [2022-01-10 06:51:46,979 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 06:51:46,979 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-10 06:51:46,979 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:51:46,979 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-10 06:51:46,980 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=315, Unknown=0, NotChecked=0, Total=380 [2022-01-10 06:51:46,980 INFO L87 Difference]: Start difference. First operand 908 states and 1086 transitions. Second operand has 20 states, 20 states have (on average 8.95) internal successors, (179), 19 states have internal predecessors, (179), 0 states have call successors, (0), 0 states 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 06:51:47,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:51:47,098 INFO L93 Difference]: Finished difference Result 1415 states and 1735 transitions. [2022-01-10 06:51:47,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-10 06:51:47,098 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 8.95) internal successors, (179), 19 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 114 [2022-01-10 06:51:47,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:51:47,100 INFO L225 Difference]: With dead ends: 1415 [2022-01-10 06:51:47,100 INFO L226 Difference]: Without dead ends: 908 [2022-01-10 06:51:47,101 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 230 GetRequests, 208 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=101, Invalid=451, Unknown=0, NotChecked=0, Total=552 [2022-01-10 06:51:47,101 INFO L933 BasicCegarLoop]: 71 mSDtfsCounter, 86 mSDsluCounter, 653 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 724 SdHoareTripleChecker+Invalid, 116 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 54 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 06:51:47,102 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [86 Valid, 724 Invalid, 116 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 59 Invalid, 0 Unknown, 54 Unchecked, 0.0s Time] [2022-01-10 06:51:47,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 908 states. [2022-01-10 06:51:47,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 908 to 908. [2022-01-10 06:51:47,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 908 states, 907 states have (on average 1.1929437706725468) internal successors, (1082), 907 states have internal predecessors, (1082), 0 states have call successors, (0), 0 states 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 06:51:47,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 908 states to 908 states and 1082 transitions. [2022-01-10 06:51:47,157 INFO L78 Accepts]: Start accepts. Automaton has 908 states and 1082 transitions. Word has length 114 [2022-01-10 06:51:47,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:51:47,157 INFO L470 AbstractCegarLoop]: Abstraction has 908 states and 1082 transitions. [2022-01-10 06:51:47,158 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 8.95) internal successors, (179), 19 states have internal predecessors, (179), 0 states have call successors, (0), 0 states 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 06:51:47,158 INFO L276 IsEmpty]: Start isEmpty. Operand 908 states and 1082 transitions. [2022-01-10 06:51:47,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2022-01-10 06:51:47,159 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:51:47,159 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 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, 1] [2022-01-10 06:51:47,166 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (34)] Ended with exit code 0 [2022-01-10 06:51:47,361 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 06:51:47,361 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:51:47,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:51:47,361 INFO L85 PathProgramCache]: Analyzing trace with hash 261594826, now seen corresponding path program 1 times [2022-01-10 06:51:47,362 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:51:47,362 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1113557026] [2022-01-10 06:51:47,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:51:47,362 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:51:47,362 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:51:47,363 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 06:51:47,363 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 06:51:47,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:51:47,421 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 30 conjunts are in the unsatisfiable core [2022-01-10 06:51:47,422 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:51:50,840 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 25 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 06:51:50,841 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 06:51:52,171 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 16 proven. 79 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 06:51:52,171 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:51:52,171 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1113557026] [2022-01-10 06:51:52,171 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1113557026] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 06:51:52,171 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 06:51:52,172 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 20] total 43 [2022-01-10 06:51:52,172 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [504012048] [2022-01-10 06:51:52,172 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 06:51:52,172 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-01-10 06:51:52,172 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:51:52,172 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-01-10 06:51:52,173 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=1596, Unknown=0, NotChecked=0, Total=1806 [2022-01-10 06:51:52,173 INFO L87 Difference]: Start difference. First operand 908 states and 1082 transitions. Second operand has 43 states, 43 states have (on average 5.116279069767442) internal successors, (220), 43 states have internal predecessors, (220), 0 states have call successors, (0), 0 states 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 06:51:53,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:51:53,043 INFO L93 Difference]: Finished difference Result 1528 states and 1842 transitions. [2022-01-10 06:51:53,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-01-10 06:51:53,044 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 5.116279069767442) internal successors, (220), 43 states have internal predecessors, (220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 115 [2022-01-10 06:51:53,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:51:53,046 INFO L225 Difference]: With dead ends: 1528 [2022-01-10 06:51:53,046 INFO L226 Difference]: Without dead ends: 1248 [2022-01-10 06:51:53,047 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 235 GetRequests, 188 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 586 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=287, Invalid=2065, Unknown=0, NotChecked=0, Total=2352 [2022-01-10 06:51:53,047 INFO L933 BasicCegarLoop]: 142 mSDtfsCounter, 366 mSDsluCounter, 2439 mSDsCounter, 0 mSdLazyCounter, 445 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 366 SdHoareTripleChecker+Valid, 2581 SdHoareTripleChecker+Invalid, 684 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 445 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 217 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-10 06:51:53,047 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [366 Valid, 2581 Invalid, 684 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 445 Invalid, 0 Unknown, 217 Unchecked, 0.3s Time] [2022-01-10 06:51:53,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1248 states. [2022-01-10 06:51:53,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1248 to 921. [2022-01-10 06:51:53,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 921 states, 920 states have (on average 1.1934782608695653) internal successors, (1098), 920 states have internal predecessors, (1098), 0 states have call successors, (0), 0 states 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 06:51:53,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 921 states to 921 states and 1098 transitions. [2022-01-10 06:51:53,098 INFO L78 Accepts]: Start accepts. Automaton has 921 states and 1098 transitions. Word has length 115 [2022-01-10 06:51:53,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:51:53,098 INFO L470 AbstractCegarLoop]: Abstraction has 921 states and 1098 transitions. [2022-01-10 06:51:53,098 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 5.116279069767442) internal successors, (220), 43 states have internal predecessors, (220), 0 states have call successors, (0), 0 states 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 06:51:53,098 INFO L276 IsEmpty]: Start isEmpty. Operand 921 states and 1098 transitions. [2022-01-10 06:51:53,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2022-01-10 06:51:53,099 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:51:53,099 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 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 06:51:53,108 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 06:51:53,308 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 06:51:53,308 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:51:53,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:51:53,309 INFO L85 PathProgramCache]: Analyzing trace with hash 1445080891, now seen corresponding path program 1 times [2022-01-10 06:51:53,309 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:51:53,309 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1068643048] [2022-01-10 06:51:53,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:51:53,309 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:51:53,309 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:51:53,310 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 06:51:53,312 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 06:51:53,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:51:53,369 INFO L263 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 13 conjunts are in the unsatisfiable core [2022-01-10 06:51:53,370 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:51:54,758 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 22 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 06:51:54,758 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 06:51:55,118 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 22 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 06:51:55,119 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:51:55,119 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1068643048] [2022-01-10 06:51:55,119 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1068643048] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 06:51:55,119 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 06:51:55,119 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 25 [2022-01-10 06:51:55,119 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [427547611] [2022-01-10 06:51:55,119 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 06:51:55,120 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-10 06:51:55,120 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:51:55,120 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-10 06:51:55,120 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=567, Unknown=0, NotChecked=0, Total=650 [2022-01-10 06:51:55,120 INFO L87 Difference]: Start difference. First operand 921 states and 1098 transitions. Second operand has 26 states, 26 states have (on average 8.5) internal successors, (221), 25 states have internal predecessors, (221), 0 states have call successors, (0), 0 states 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 06:51:55,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:51:55,291 INFO L93 Difference]: Finished difference Result 1410 states and 1718 transitions. [2022-01-10 06:51:55,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-01-10 06:51:55,292 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 8.5) internal successors, (221), 25 states have internal predecessors, (221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 115 [2022-01-10 06:51:55,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:51:55,295 INFO L225 Difference]: With dead ends: 1410 [2022-01-10 06:51:55,295 INFO L226 Difference]: Without dead ends: 976 [2022-01-10 06:51:55,296 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 233 GetRequests, 205 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 201 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=118, Invalid=752, Unknown=0, NotChecked=0, Total=870 [2022-01-10 06:51:55,296 INFO L933 BasicCegarLoop]: 91 mSDtfsCounter, 198 mSDsluCounter, 1276 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 198 SdHoareTripleChecker+Valid, 1367 SdHoareTripleChecker+Invalid, 131 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 90 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 06:51:55,298 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [198 Valid, 1367 Invalid, 131 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 38 Invalid, 0 Unknown, 90 Unchecked, 0.0s Time] [2022-01-10 06:51:55,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 976 states. [2022-01-10 06:51:55,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 976 to 921. [2022-01-10 06:51:55,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 921 states, 920 states have (on average 1.1934782608695653) internal successors, (1098), 920 states have internal predecessors, (1098), 0 states have call successors, (0), 0 states 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 06:51:55,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 921 states to 921 states and 1098 transitions. [2022-01-10 06:51:55,351 INFO L78 Accepts]: Start accepts. Automaton has 921 states and 1098 transitions. Word has length 115 [2022-01-10 06:51:55,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:51:55,351 INFO L470 AbstractCegarLoop]: Abstraction has 921 states and 1098 transitions. [2022-01-10 06:51:55,352 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 8.5) internal successors, (221), 25 states have internal predecessors, (221), 0 states have call successors, (0), 0 states 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 06:51:55,352 INFO L276 IsEmpty]: Start isEmpty. Operand 921 states and 1098 transitions. [2022-01-10 06:51:55,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2022-01-10 06:51:55,353 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:51:55,353 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 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, 1] [2022-01-10 06:51:55,365 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (36)] Forceful destruction successful, exit code 0 [2022-01-10 06:51:55,562 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 06:51:55,563 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:51:55,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:51:55,563 INFO L85 PathProgramCache]: Analyzing trace with hash 1191890637, now seen corresponding path program 1 times [2022-01-10 06:51:55,563 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:51:55,563 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [780874338] [2022-01-10 06:51:55,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:51:55,563 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:51:55,563 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:51:55,564 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 06:51:55,565 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 06:51:55,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:51:55,624 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 28 conjunts are in the unsatisfiable core [2022-01-10 06:51:55,625 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:51:58,595 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 34 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 06:51:58,595 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 06:51:59,906 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 16 proven. 79 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 06:51:59,906 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:51:59,906 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [780874338] [2022-01-10 06:51:59,906 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [780874338] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 06:51:59,906 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 06:51:59,906 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 21] total 42 [2022-01-10 06:51:59,906 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [345528819] [2022-01-10 06:51:59,906 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 06:51:59,907 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-01-10 06:51:59,907 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:51:59,907 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-01-10 06:51:59,907 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=203, Invalid=1519, Unknown=0, NotChecked=0, Total=1722 [2022-01-10 06:51:59,907 INFO L87 Difference]: Start difference. First operand 921 states and 1098 transitions. Second operand has 42 states, 42 states have (on average 5.238095238095238) internal successors, (220), 42 states have internal predecessors, (220), 0 states have call successors, (0), 0 states 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 06:52:00,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:52:00,786 INFO L93 Difference]: Finished difference Result 1526 states and 1842 transitions. [2022-01-10 06:52:00,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-01-10 06:52:00,787 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 5.238095238095238) internal successors, (220), 42 states have internal predecessors, (220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 115 [2022-01-10 06:52:00,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:52:00,790 INFO L225 Difference]: With dead ends: 1526 [2022-01-10 06:52:00,790 INFO L226 Difference]: Without dead ends: 1234 [2022-01-10 06:52:00,791 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 235 GetRequests, 189 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 666 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=276, Invalid=1980, Unknown=0, NotChecked=0, Total=2256 [2022-01-10 06:52:00,791 INFO L933 BasicCegarLoop]: 129 mSDtfsCounter, 401 mSDsluCounter, 2778 mSDsCounter, 0 mSdLazyCounter, 463 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 401 SdHoareTripleChecker+Valid, 2907 SdHoareTripleChecker+Invalid, 796 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 463 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 308 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-10 06:52:00,791 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [401 Valid, 2907 Invalid, 796 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 463 Invalid, 0 Unknown, 308 Unchecked, 0.3s Time] [2022-01-10 06:52:00,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1234 states. [2022-01-10 06:52:00,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1234 to 927. [2022-01-10 06:52:00,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 927 states, 926 states have (on average 1.193304535637149) internal successors, (1105), 926 states have internal predecessors, (1105), 0 states have call successors, (0), 0 states 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 06:52:00,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 927 states to 927 states and 1105 transitions. [2022-01-10 06:52:00,832 INFO L78 Accepts]: Start accepts. Automaton has 927 states and 1105 transitions. Word has length 115 [2022-01-10 06:52:00,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:52:00,832 INFO L470 AbstractCegarLoop]: Abstraction has 927 states and 1105 transitions. [2022-01-10 06:52:00,833 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 5.238095238095238) internal successors, (220), 42 states have internal predecessors, (220), 0 states have call successors, (0), 0 states 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 06:52:00,833 INFO L276 IsEmpty]: Start isEmpty. Operand 927 states and 1105 transitions. [2022-01-10 06:52:00,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2022-01-10 06:52:00,834 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:52:00,834 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 3, 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, 1, 1] [2022-01-10 06:52:00,840 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 06:52:01,035 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 06:52:01,035 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:52:01,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:52:01,035 INFO L85 PathProgramCache]: Analyzing trace with hash -800070656, now seen corresponding path program 1 times [2022-01-10 06:52:01,036 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:52:01,036 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1535604260] [2022-01-10 06:52:01,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:52:01,036 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:52:01,036 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:52:01,037 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 06:52:01,037 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 06:52:01,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:52:01,095 INFO L263 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-10 06:52:01,096 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:52:01,773 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 40 proven. 28 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-01-10 06:52:01,773 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 06:52:02,123 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 40 proven. 28 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-01-10 06:52:02,123 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:52:02,123 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1535604260] [2022-01-10 06:52:02,123 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1535604260] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 06:52:02,123 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 06:52:02,123 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2022-01-10 06:52:02,123 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2111670050] [2022-01-10 06:52:02,123 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 06:52:02,123 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-10 06:52:02,124 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:52:02,124 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-10 06:52:02,124 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2022-01-10 06:52:02,124 INFO L87 Difference]: Start difference. First operand 927 states and 1105 transitions. Second operand has 16 states, 16 states have (on average 10.4375) internal successors, (167), 15 states have internal predecessors, (167), 0 states have call successors, (0), 0 states 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 06:52:02,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:52:02,306 INFO L93 Difference]: Finished difference Result 1954 states and 2411 transitions. [2022-01-10 06:52:02,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-10 06:52:02,306 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 10.4375) internal successors, (167), 15 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 115 [2022-01-10 06:52:02,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:52:02,310 INFO L225 Difference]: With dead ends: 1954 [2022-01-10 06:52:02,310 INFO L226 Difference]: Without dead ends: 1494 [2022-01-10 06:52:02,310 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 237 GetRequests, 215 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=117, Invalid=435, Unknown=0, NotChecked=0, Total=552 [2022-01-10 06:52:02,311 INFO L933 BasicCegarLoop]: 83 mSDtfsCounter, 117 mSDsluCounter, 861 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 944 SdHoareTripleChecker+Invalid, 116 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 84 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 06:52:02,311 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [117 Valid, 944 Invalid, 116 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 29 Invalid, 0 Unknown, 84 Unchecked, 0.0s Time] [2022-01-10 06:52:02,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1494 states. [2022-01-10 06:52:02,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1494 to 1472. [2022-01-10 06:52:02,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1472 states, 1471 states have (on average 1.2195785180149559) internal successors, (1794), 1471 states have internal predecessors, (1794), 0 states have call successors, (0), 0 states 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 06:52:02,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1472 states to 1472 states and 1794 transitions. [2022-01-10 06:52:02,387 INFO L78 Accepts]: Start accepts. Automaton has 1472 states and 1794 transitions. Word has length 115 [2022-01-10 06:52:02,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:52:02,388 INFO L470 AbstractCegarLoop]: Abstraction has 1472 states and 1794 transitions. [2022-01-10 06:52:02,388 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 10.4375) internal successors, (167), 15 states have internal predecessors, (167), 0 states have call successors, (0), 0 states 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 06:52:02,388 INFO L276 IsEmpty]: Start isEmpty. Operand 1472 states and 1794 transitions. [2022-01-10 06:52:02,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2022-01-10 06:52:02,389 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:52:02,389 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 3, 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, 1] [2022-01-10 06:52:02,397 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (38)] Forceful destruction successful, exit code 0 [2022-01-10 06:52:02,591 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 06:52:02,591 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:52:02,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:52:02,592 INFO L85 PathProgramCache]: Analyzing trace with hash 241847234, now seen corresponding path program 1 times [2022-01-10 06:52:02,592 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:52:02,592 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [992852454] [2022-01-10 06:52:02,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:52:02,592 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:52:02,592 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:52:02,593 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 06:52:02,593 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 06:52:02,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:52:02,651 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 5 conjunts are in the unsatisfiable core [2022-01-10 06:52:02,652 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:52:03,141 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 85 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-01-10 06:52:03,142 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:52:03,142 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:52:03,142 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [992852454] [2022-01-10 06:52:03,142 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [992852454] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:52:03,142 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:52:03,142 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-10 06:52:03,142 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1347744229] [2022-01-10 06:52:03,142 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:52:03,143 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-10 06:52:03,143 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:52:03,143 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-10 06:52:03,143 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-01-10 06:52:03,143 INFO L87 Difference]: Start difference. First operand 1472 states and 1794 transitions. Second operand has 6 states, 6 states have (on average 17.833333333333332) internal successors, (107), 5 states have internal predecessors, (107), 0 states have call successors, (0), 0 states 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 06:52:03,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:52:03,242 INFO L93 Difference]: Finished difference Result 2496 states and 3100 transitions. [2022-01-10 06:52:03,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-10 06:52:03,243 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 17.833333333333332) internal successors, (107), 5 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 115 [2022-01-10 06:52:03,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:52:03,248 INFO L225 Difference]: With dead ends: 2496 [2022-01-10 06:52:03,248 INFO L226 Difference]: Without dead ends: 1997 [2022-01-10 06:52:03,249 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-01-10 06:52:03,249 INFO L933 BasicCegarLoop]: 82 mSDtfsCounter, 80 mSDsluCounter, 143 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 225 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 38 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 06:52:03,249 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [80 Valid, 225 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 8 Invalid, 0 Unknown, 38 Unchecked, 0.0s Time] [2022-01-10 06:52:03,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1997 states. [2022-01-10 06:52:03,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1997 to 1977. [2022-01-10 06:52:03,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1977 states, 1976 states have (on average 1.2231781376518218) internal successors, (2417), 1976 states have internal predecessors, (2417), 0 states have call successors, (0), 0 states 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 06:52:03,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1977 states to 1977 states and 2417 transitions. [2022-01-10 06:52:03,335 INFO L78 Accepts]: Start accepts. Automaton has 1977 states and 2417 transitions. Word has length 115 [2022-01-10 06:52:03,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:52:03,335 INFO L470 AbstractCegarLoop]: Abstraction has 1977 states and 2417 transitions. [2022-01-10 06:52:03,335 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.833333333333332) internal successors, (107), 5 states have internal predecessors, (107), 0 states have call successors, (0), 0 states 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 06:52:03,335 INFO L276 IsEmpty]: Start isEmpty. Operand 1977 states and 2417 transitions. [2022-01-10 06:52:03,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2022-01-10 06:52:03,337 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:52:03,337 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 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, 1, 1] [2022-01-10 06:52:03,351 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 06:52:03,546 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 06:52:03,546 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:52:03,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:52:03,546 INFO L85 PathProgramCache]: Analyzing trace with hash 1726875513, now seen corresponding path program 1 times [2022-01-10 06:52:03,547 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:52:03,547 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [532686970] [2022-01-10 06:52:03,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:52:03,547 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:52:03,547 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:52:03,548 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 06:52:03,549 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 06:52:03,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:52:03,606 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-10 06:52:03,607 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:52:04,465 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 16 proven. 53 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-01-10 06:52:04,465 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 06:52:04,776 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 16 proven. 53 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-01-10 06:52:04,776 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:52:04,776 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [532686970] [2022-01-10 06:52:04,776 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [532686970] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 06:52:04,776 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 06:52:04,776 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2022-01-10 06:52:04,777 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [350472495] [2022-01-10 06:52:04,777 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 06:52:04,777 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-10 06:52:04,777 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:52:04,777 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-10 06:52:04,777 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2022-01-10 06:52:04,777 INFO L87 Difference]: Start difference. First operand 1977 states and 2417 transitions. Second operand has 16 states, 16 states have (on average 11.6875) internal successors, (187), 15 states have internal predecessors, (187), 0 states have call successors, (0), 0 states 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 06:52:05,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:52:05,011 INFO L93 Difference]: Finished difference Result 3853 states and 4787 transitions. [2022-01-10 06:52:05,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-10 06:52:05,012 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 11.6875) internal successors, (187), 15 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 115 [2022-01-10 06:52:05,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:52:05,020 INFO L225 Difference]: With dead ends: 3853 [2022-01-10 06:52:05,020 INFO L226 Difference]: Without dead ends: 2971 [2022-01-10 06:52:05,021 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 238 GetRequests, 217 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=104, Invalid=402, Unknown=0, NotChecked=0, Total=506 [2022-01-10 06:52:05,022 INFO L933 BasicCegarLoop]: 88 mSDtfsCounter, 89 mSDsluCounter, 860 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 948 SdHoareTripleChecker+Invalid, 114 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 96 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 06:52:05,022 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [89 Valid, 948 Invalid, 114 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 17 Invalid, 0 Unknown, 96 Unchecked, 0.0s Time] [2022-01-10 06:52:05,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2971 states. [2022-01-10 06:52:05,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2971 to 2951. [2022-01-10 06:52:05,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2951 states, 2950 states have (on average 1.2291525423728813) internal successors, (3626), 2950 states have internal predecessors, (3626), 0 states have call successors, (0), 0 states 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 06:52:05,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2951 states to 2951 states and 3626 transitions. [2022-01-10 06:52:05,161 INFO L78 Accepts]: Start accepts. Automaton has 2951 states and 3626 transitions. Word has length 115 [2022-01-10 06:52:05,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:52:05,161 INFO L470 AbstractCegarLoop]: Abstraction has 2951 states and 3626 transitions. [2022-01-10 06:52:05,161 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 11.6875) internal successors, (187), 15 states have internal predecessors, (187), 0 states have call successors, (0), 0 states 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 06:52:05,161 INFO L276 IsEmpty]: Start isEmpty. Operand 2951 states and 3626 transitions. [2022-01-10 06:52:05,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2022-01-10 06:52:05,163 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:52:05,163 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 3, 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, 1] [2022-01-10 06:52:05,175 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 06:52:05,372 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 06:52:05,372 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:52:05,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:52:05,373 INFO L85 PathProgramCache]: Analyzing trace with hash 1903481417, now seen corresponding path program 1 times [2022-01-10 06:52:05,373 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:52:05,373 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [427352445] [2022-01-10 06:52:05,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:52:05,373 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:52:05,373 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:52:05,374 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 06:52:05,376 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 06:52:05,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:52:05,431 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 5 conjunts are in the unsatisfiable core [2022-01-10 06:52:05,432 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:52:05,910 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 83 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-01-10 06:52:05,910 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:52:05,911 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:52:05,911 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [427352445] [2022-01-10 06:52:05,911 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [427352445] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:52:05,911 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:52:05,911 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-10 06:52:05,911 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1146527706] [2022-01-10 06:52:05,911 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:52:05,911 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-10 06:52:05,911 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:52:05,911 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-10 06:52:05,912 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-01-10 06:52:05,912 INFO L87 Difference]: Start difference. First operand 2951 states and 3626 transitions. Second operand has 6 states, 6 states have (on average 17.666666666666668) internal successors, (106), 5 states have internal predecessors, (106), 0 states have call successors, (0), 0 states 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 06:52:06,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:52:06,067 INFO L93 Difference]: Finished difference Result 4059 states and 5005 transitions. [2022-01-10 06:52:06,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-10 06:52:06,067 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 17.666666666666668) internal successors, (106), 5 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 115 [2022-01-10 06:52:06,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:52:06,072 INFO L225 Difference]: With dead ends: 4059 [2022-01-10 06:52:06,072 INFO L226 Difference]: Without dead ends: 3055 [2022-01-10 06:52:06,073 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-01-10 06:52:06,073 INFO L933 BasicCegarLoop]: 87 mSDtfsCounter, 68 mSDsluCounter, 183 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 270 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 44 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 06:52:06,073 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [68 Valid, 270 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 22 Invalid, 0 Unknown, 44 Unchecked, 0.0s Time] [2022-01-10 06:52:06,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3055 states. [2022-01-10 06:52:06,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3055 to 2951. [2022-01-10 06:52:06,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2951 states, 2950 states have (on average 1.2210169491525424) internal successors, (3602), 2950 states have internal predecessors, (3602), 0 states have call successors, (0), 0 states 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 06:52:06,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2951 states to 2951 states and 3602 transitions. [2022-01-10 06:52:06,201 INFO L78 Accepts]: Start accepts. Automaton has 2951 states and 3602 transitions. Word has length 115 [2022-01-10 06:52:06,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:52:06,201 INFO L470 AbstractCegarLoop]: Abstraction has 2951 states and 3602 transitions. [2022-01-10 06:52:06,201 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.666666666666668) internal successors, (106), 5 states have internal predecessors, (106), 0 states have call successors, (0), 0 states 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 06:52:06,201 INFO L276 IsEmpty]: Start isEmpty. Operand 2951 states and 3602 transitions. [2022-01-10 06:52:06,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2022-01-10 06:52:06,203 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:52:06,203 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 3, 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, 1, 1] [2022-01-10 06:52:06,209 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (41)] Ended with exit code 0 [2022-01-10 06:52:06,403 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 06:52:06,404 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:52:06,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:52:06,404 INFO L85 PathProgramCache]: Analyzing trace with hash -1966249824, now seen corresponding path program 1 times [2022-01-10 06:52:06,404 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:52:06,404 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1349780815] [2022-01-10 06:52:06,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:52:06,404 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:52:06,404 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:52:06,405 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 06:52:06,407 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 06:52:06,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:52:06,463 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 13 conjunts are in the unsatisfiable core [2022-01-10 06:52:06,464 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:52:07,683 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 30 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 06:52:07,683 INFO L328 TraceCheckSpWp]: Computing backward predicates...