/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_overflow.ufo.UNBOUNDED.pals.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-a10ec3b [2022-01-10 06:51:17,474 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-10 06:51:17,476 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-10 06:51:17,543 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-01-10 06:51:17,568 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-10 06:51:17,568 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-10 06:51:17,569 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-10 06:51:17,575 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 06:51:17,588 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-10 06:51:17,589 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-10 06:51:17,589 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-01-10 06:51:17,589 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-01-10 06:51:17,589 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-01-10 06:51:17,590 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-01-10 06:51:17,590 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-01-10 06:51:17,590 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-01-10 06:51:17,590 INFO L138 SettingsManager]: * Use SBE=true [2022-01-10 06:51:17,590 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-10 06:51:17,590 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-10 06:51:17,591 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-10 06:51:17,591 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-10 06:51:17,591 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-10 06:51:17,593 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-10 06:51:17,593 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-01-10 06:51:17,593 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-01-10 06:51:17,594 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-01-10 06:51:17,594 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-10 06:51:17,594 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-10 06:51:17,594 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-10 06:51:17,594 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-10 06:51:17,594 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-10 06:51:17,594 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-10 06:51:17,594 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-10 06:51:17,594 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-01-10 06:51:17,595 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-01-10 06:51:17,595 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2022-01-10 06:51:17,595 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-01-10 06:51:17,595 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-01-10 06:51:17,595 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-01-10 06:51:17,595 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-01-10 06:51:17,595 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-01-10 06:51:17,595 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-10 06:51:17,769 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-10 06:51:17,783 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-10 06:51:17,785 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-10 06:51:17,785 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-10 06:51:17,786 INFO L275 PluginConnector]: CDTParser initialized [2022-01-10 06:51:17,787 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded/pals_lcr.3_overflow.ufo.UNBOUNDED.pals.c [2022-01-10 06:51:17,843 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6da7f5ed9/3c7a0f917698483a993407cd2662faf4/FLAGf199684e1 [2022-01-10 06:51:18,199 INFO L306 CDTParser]: Found 1 translation units. [2022-01-10 06:51:18,199 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/seq-mthreaded/pals_lcr.3_overflow.ufo.UNBOUNDED.pals.c [2022-01-10 06:51:18,209 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6da7f5ed9/3c7a0f917698483a993407cd2662faf4/FLAGf199684e1 [2022-01-10 06:51:18,218 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6da7f5ed9/3c7a0f917698483a993407cd2662faf4 [2022-01-10 06:51:18,219 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-10 06:51:18,220 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-01-10 06:51:18,224 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-10 06:51:18,225 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-10 06:51:18,227 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-10 06:51:18,228 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 06:51:18" (1/1) ... [2022-01-10 06:51:18,228 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1829e0e1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:51:18, skipping insertion in model container [2022-01-10 06:51:18,228 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 06:51:18" (1/1) ... [2022-01-10 06:51:18,233 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-10 06:51:18,247 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-10 06:51:18,448 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_overflow.ufo.UNBOUNDED.pals.c[6117,6130] [2022-01-10 06:51:18,451 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-10 06:51:18,464 INFO L203 MainTranslator]: Completed pre-run [2022-01-10 06:51:18,502 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_overflow.ufo.UNBOUNDED.pals.c[6117,6130] [2022-01-10 06:51:18,502 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-10 06:51:18,512 INFO L208 MainTranslator]: Completed translation [2022-01-10 06:51:18,513 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:51:18 WrapperNode [2022-01-10 06:51:18,513 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-10 06:51:18,514 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-01-10 06:51:18,514 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-01-10 06:51:18,514 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-01-10 06:51:18,519 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:51:18" (1/1) ... [2022-01-10 06:51:18,536 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:51:18" (1/1) ... [2022-01-10 06:51:18,558 INFO L137 Inliner]: procedures = 23, calls = 14, calls flagged for inlining = 9, calls inlined = 9, statements flattened = 206 [2022-01-10 06:51:18,558 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-01-10 06:51:18,559 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-10 06:51:18,559 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-10 06:51:18,559 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-10 06:51:18,564 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:51:18" (1/1) ... [2022-01-10 06:51:18,565 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:51:18" (1/1) ... [2022-01-10 06:51:18,575 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:51:18" (1/1) ... [2022-01-10 06:51:18,576 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:51:18" (1/1) ... [2022-01-10 06:51:18,580 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:51:18" (1/1) ... [2022-01-10 06:51:18,588 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:51:18" (1/1) ... [2022-01-10 06:51:18,589 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:51:18" (1/1) ... [2022-01-10 06:51:18,591 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-10 06:51:18,592 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-10 06:51:18,592 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-10 06:51:18,592 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-10 06:51:18,597 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:51:18" (1/1) ... [2022-01-10 06:51:18,602 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-10 06:51:18,610 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 06:51:18,621 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 06:51:18,649 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 06:51:18,660 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-10 06:51:18,660 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-01-10 06:51:18,660 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-10 06:51:18,660 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-10 06:51:18,757 INFO L234 CfgBuilder]: Building ICFG [2022-01-10 06:51:18,758 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-10 06:51:18,997 INFO L275 CfgBuilder]: Performing block encoding [2022-01-10 06:51:19,001 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-10 06:51:19,001 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-01-10 06:51:19,002 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 06:51:19 BoogieIcfgContainer [2022-01-10 06:51:19,002 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-10 06:51:19,004 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-10 06:51:19,004 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-10 06:51:19,006 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-10 06:51:19,007 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 10.01 06:51:18" (1/3) ... [2022-01-10 06:51:19,008 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@54337208 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 06:51:19, skipping insertion in model container [2022-01-10 06:51:19,008 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:51:18" (2/3) ... [2022-01-10 06:51:19,008 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@54337208 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 06:51:19, skipping insertion in model container [2022-01-10 06:51:19,008 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 06:51:19" (3/3) ... [2022-01-10 06:51:19,009 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr.3_overflow.ufo.UNBOUNDED.pals.c [2022-01-10 06:51:19,012 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-01-10 06:51:19,012 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-10 06:51:19,041 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-10 06:51:19,045 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 06:51:19,045 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-01-10 06:51:19,054 INFO L276 IsEmpty]: Start isEmpty. Operand has 62 states, 60 states have (on average 1.6833333333333333) internal successors, (101), 61 states have internal predecessors, (101), 0 states have call successors, (0), 0 states 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 06:51:19,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-01-10 06:51:19,058 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:51:19,059 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 06:51:19,060 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:51:19,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:51:19,066 INFO L85 PathProgramCache]: Analyzing trace with hash 1133243219, now seen corresponding path program 1 times [2022-01-10 06:51:19,076 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:51:19,076 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [522416120] [2022-01-10 06:51:19,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:51:19,077 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:51:19,077 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:51:19,079 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 06:51:19,121 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 06:51:19,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:51:19,148 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 1 conjunts are in the unsatisfiable core [2022-01-10 06:51:19,151 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:51:19,239 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 06:51:19,239 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:51:19,239 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:51:19,240 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [522416120] [2022-01-10 06:51:19,240 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [522416120] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:51:19,240 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:51:19,240 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-01-10 06:51:19,241 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1942633611] [2022-01-10 06:51:19,242 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:51:19,247 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-01-10 06:51:19,248 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:51:19,272 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-01-10 06:51:19,273 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-01-10 06:51:19,274 INFO L87 Difference]: Start difference. First operand has 62 states, 60 states have (on average 1.6833333333333333) internal successors, (101), 61 states have internal predecessors, (101), 0 states have call successors, (0), 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 06:51:19,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:51:19,294 INFO L93 Difference]: Finished difference Result 99 states and 161 transitions. [2022-01-10 06:51:19,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-01-10 06:51:19,296 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 06:51:19,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:51:19,301 INFO L225 Difference]: With dead ends: 99 [2022-01-10 06:51:19,301 INFO L226 Difference]: Without dead ends: 58 [2022-01-10 06:51:19,303 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 06:51:19,307 INFO L933 BasicCegarLoop]: 94 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, 94 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 06:51:19,308 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 94 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 06:51:19,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2022-01-10 06:51:19,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2022-01-10 06:51:19,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 57 states have (on average 1.6491228070175439) internal successors, (94), 57 states have internal predecessors, (94), 0 states have call successors, (0), 0 states 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 06:51:19,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 94 transitions. [2022-01-10 06:51:19,336 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 94 transitions. Word has length 25 [2022-01-10 06:51:19,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:51:19,336 INFO L470 AbstractCegarLoop]: Abstraction has 58 states and 94 transitions. [2022-01-10 06:51:19,336 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 06:51:19,336 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 94 transitions. [2022-01-10 06:51:19,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-01-10 06:51:19,337 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:51:19,337 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 06:51:19,345 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Ended with exit code 0 [2022-01-10 06:51:19,543 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 06:51:19,544 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:51:19,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:51:19,544 INFO L85 PathProgramCache]: Analyzing trace with hash 315594769, now seen corresponding path program 1 times [2022-01-10 06:51:19,545 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:51:19,545 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1880843404] [2022-01-10 06:51:19,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:51:19,545 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:51:19,545 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:51:19,546 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 06:51:19,547 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 06:51:19,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:51:19,599 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-10 06:51:19,601 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:51:19,693 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 06:51:19,694 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:51:19,694 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:51:19,694 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1880843404] [2022-01-10 06:51:19,694 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1880843404] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:51:19,694 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:51:19,694 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-10 06:51:19,694 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2019388699] [2022-01-10 06:51:19,694 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:51:19,695 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 06:51:19,696 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:51:19,711 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 06:51:19,711 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-10 06:51:19,711 INFO L87 Difference]: Start difference. First operand 58 states and 94 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 06:51:19,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:51:19,779 INFO L93 Difference]: Finished difference Result 98 states and 154 transitions. [2022-01-10 06:51:19,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-10 06:51:19,780 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 06:51:19,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:51:19,780 INFO L225 Difference]: With dead ends: 98 [2022-01-10 06:51:19,780 INFO L226 Difference]: Without dead ends: 58 [2022-01-10 06:51:19,781 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 06:51:19,782 INFO L933 BasicCegarLoop]: 92 mSDtfsCounter, 3 mSDsluCounter, 257 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 349 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 06:51:19,782 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 349 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 06:51:19,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2022-01-10 06:51:19,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2022-01-10 06:51:19,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 57 states have (on average 1.368421052631579) internal successors, (78), 57 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 06:51:19,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 78 transitions. [2022-01-10 06:51:19,786 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 78 transitions. Word has length 25 [2022-01-10 06:51:19,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:51:19,786 INFO L470 AbstractCegarLoop]: Abstraction has 58 states and 78 transitions. [2022-01-10 06:51:19,787 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 06:51:19,787 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 78 transitions. [2022-01-10 06:51:19,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-01-10 06:51:19,787 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:51:19,788 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 06:51:19,796 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 06:51:19,994 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 06:51:19,994 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:51:19,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:51:19,995 INFO L85 PathProgramCache]: Analyzing trace with hash -278543826, now seen corresponding path program 1 times [2022-01-10 06:51:19,995 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:51:19,996 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [744246006] [2022-01-10 06:51:19,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:51:19,996 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:51:19,996 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:51:19,997 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 06:51:19,998 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 06:51:20,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:51:20,046 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-10 06:51:20,048 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:51:20,174 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 06:51:20,175 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:51:20,175 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:51:20,175 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [744246006] [2022-01-10 06:51:20,175 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [744246006] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:51:20,176 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:51:20,176 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 06:51:20,178 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [86818535] [2022-01-10 06:51:20,179 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:51:20,179 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 06:51:20,179 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:51:20,180 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 06:51:20,181 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 06:51:20,182 INFO L87 Difference]: Start difference. First operand 58 states and 78 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 06:51:20,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:51:20,210 INFO L93 Difference]: Finished difference Result 124 states and 180 transitions. [2022-01-10 06:51:20,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 06:51:20,211 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 06:51:20,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:51:20,214 INFO L225 Difference]: With dead ends: 124 [2022-01-10 06:51:20,214 INFO L226 Difference]: Without dead ends: 88 [2022-01-10 06:51:20,214 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 06:51:20,215 INFO L933 BasicCegarLoop]: 120 mSDtfsCounter, 46 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 174 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 06:51:20,215 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [46 Valid, 174 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 06:51:20,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2022-01-10 06:51:20,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 86. [2022-01-10 06:51:20,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 85 states have (on average 1.4352941176470588) internal successors, (122), 85 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 06:51:20,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 122 transitions. [2022-01-10 06:51:20,222 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 122 transitions. Word has length 40 [2022-01-10 06:51:20,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:51:20,222 INFO L470 AbstractCegarLoop]: Abstraction has 86 states and 122 transitions. [2022-01-10 06:51:20,222 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 06:51:20,222 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 122 transitions. [2022-01-10 06:51:20,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-01-10 06:51:20,223 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:51:20,226 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 06:51:20,237 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 06:51:20,433 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 06:51:20,434 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:51:20,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:51:20,435 INFO L85 PathProgramCache]: Analyzing trace with hash 1401070434, now seen corresponding path program 1 times [2022-01-10 06:51:20,435 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:51:20,435 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [495418335] [2022-01-10 06:51:20,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:51:20,436 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:51:20,436 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:51:20,437 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 06:51:20,438 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 06:51:20,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:51:20,487 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 5 conjunts are in the unsatisfiable core [2022-01-10 06:51:20,490 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:51:20,784 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 06:51:20,784 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:51:20,784 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:51:20,784 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [495418335] [2022-01-10 06:51:20,784 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [495418335] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:51:20,784 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:51:20,784 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-10 06:51:20,785 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1151890032] [2022-01-10 06:51:20,785 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:51:20,785 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-10 06:51:20,785 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:51:20,785 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-10 06:51:20,786 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-01-10 06:51:20,786 INFO L87 Difference]: Start difference. First operand 86 states and 122 transitions. Second operand has 6 states, 6 states have (on average 6.666666666666667) 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 06:51:20,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:51:20,802 INFO L93 Difference]: Finished difference Result 153 states and 226 transitions. [2022-01-10 06:51:20,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-10 06:51:20,803 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.666666666666667) 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 06:51:20,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:51:20,806 INFO L225 Difference]: With dead ends: 153 [2022-01-10 06:51:20,806 INFO L226 Difference]: Without dead ends: 89 [2022-01-10 06:51:20,808 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-01-10 06:51:20,811 INFO L933 BasicCegarLoop]: 74 mSDtfsCounter, 19 mSDsluCounter, 106 mSDsCounter, 0 mSdLazyCounter, 2 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 180 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 2 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 27 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 06:51:20,811 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 180 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 2 Invalid, 0 Unknown, 27 Unchecked, 0.0s Time] [2022-01-10 06:51:20,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2022-01-10 06:51:20,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 89. [2022-01-10 06:51:20,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 88 states have (on average 1.4204545454545454) internal successors, (125), 88 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 06:51:20,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 125 transitions. [2022-01-10 06:51:20,817 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 125 transitions. Word has length 40 [2022-01-10 06:51:20,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:51:20,817 INFO L470 AbstractCegarLoop]: Abstraction has 89 states and 125 transitions. [2022-01-10 06:51:20,817 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.666666666666667) 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 06:51:20,818 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 125 transitions. [2022-01-10 06:51:20,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-01-10 06:51:20,818 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:51:20,818 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 06:51:20,824 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Ended with exit code 0 [2022-01-10 06:51:21,019 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 06:51:21,019 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:51:21,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:51:21,020 INFO L85 PathProgramCache]: Analyzing trace with hash -1872828508, now seen corresponding path program 1 times [2022-01-10 06:51:21,020 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:51:21,020 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1926072640] [2022-01-10 06:51:21,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:51:21,020 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:51:21,021 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:51:21,022 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 06:51:21,023 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 06:51:21,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:51:21,064 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-10 06:51:21,065 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:51:21,130 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 06:51:21,130 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:51:21,130 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:51:21,130 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1926072640] [2022-01-10 06:51:21,130 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1926072640] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:51:21,131 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:51:21,131 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 06:51:21,131 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2142757306] [2022-01-10 06:51:21,131 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:51:21,131 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 06:51:21,131 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:51:21,132 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 06:51:21,132 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 06:51:21,132 INFO L87 Difference]: Start difference. First operand 89 states and 125 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 06:51:21,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:51:21,147 INFO L93 Difference]: Finished difference Result 205 states and 305 transitions. [2022-01-10 06:51:21,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 06:51:21,148 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 06:51:21,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:51:21,149 INFO L225 Difference]: With dead ends: 205 [2022-01-10 06:51:21,149 INFO L226 Difference]: Without dead ends: 141 [2022-01-10 06:51:21,149 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 06:51:21,150 INFO L933 BasicCegarLoop]: 116 mSDtfsCounter, 42 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 174 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 06:51:21,150 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 174 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 06:51:21,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2022-01-10 06:51:21,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 139. [2022-01-10 06:51:21,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 138 states have (on average 1.463768115942029) internal successors, (202), 138 states have internal predecessors, (202), 0 states have call successors, (0), 0 states 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 06:51:21,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 202 transitions. [2022-01-10 06:51:21,158 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 202 transitions. Word has length 40 [2022-01-10 06:51:21,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:51:21,159 INFO L470 AbstractCegarLoop]: Abstraction has 139 states and 202 transitions. [2022-01-10 06:51:21,159 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 06:51:21,159 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 202 transitions. [2022-01-10 06:51:21,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-01-10 06:51:21,160 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:51:21,160 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 06:51:21,166 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 06:51:21,366 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 06:51:21,366 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:51:21,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:51:21,367 INFO L85 PathProgramCache]: Analyzing trace with hash -1535035366, now seen corresponding path program 1 times [2022-01-10 06:51:21,367 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:51:21,367 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2131649479] [2022-01-10 06:51:21,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:51:21,367 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:51:21,368 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:51:21,368 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 06:51:21,372 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 06:51:21,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:51:21,412 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-10 06:51:21,414 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:51:21,475 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 06:51:21,476 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:51:21,476 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:51:21,476 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2131649479] [2022-01-10 06:51:21,476 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2131649479] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:51:21,476 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:51:21,476 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 06:51:21,476 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1249459427] [2022-01-10 06:51:21,476 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:51:21,477 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 06:51:21,477 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:51:21,477 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 06:51:21,477 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 06:51:21,477 INFO L87 Difference]: Start difference. First operand 139 states and 202 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 06:51:21,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:51:21,489 INFO L93 Difference]: Finished difference Result 343 states and 516 transitions. [2022-01-10 06:51:21,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 06:51:21,490 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 06:51:21,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:51:21,491 INFO L225 Difference]: With dead ends: 343 [2022-01-10 06:51:21,491 INFO L226 Difference]: Without dead ends: 229 [2022-01-10 06:51:21,491 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 06:51:21,492 INFO L933 BasicCegarLoop]: 111 mSDtfsCounter, 38 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 173 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 06:51:21,492 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 173 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 06:51:21,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229 states. [2022-01-10 06:51:21,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229 to 227. [2022-01-10 06:51:21,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 227 states, 226 states have (on average 1.4778761061946903) internal successors, (334), 226 states have internal predecessors, (334), 0 states have call successors, (0), 0 states 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 06:51:21,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 334 transitions. [2022-01-10 06:51:21,514 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 334 transitions. Word has length 40 [2022-01-10 06:51:21,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:51:21,514 INFO L470 AbstractCegarLoop]: Abstraction has 227 states and 334 transitions. [2022-01-10 06:51:21,514 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 06:51:21,514 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 334 transitions. [2022-01-10 06:51:21,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-01-10 06:51:21,515 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:51:21,515 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 06:51:21,531 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 06:51:21,721 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 06:51:21,721 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:51:21,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:51:21,722 INFO L85 PathProgramCache]: Analyzing trace with hash -317049968, now seen corresponding path program 1 times [2022-01-10 06:51:21,722 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:51:21,722 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1460444423] [2022-01-10 06:51:21,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:51:21,722 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:51:21,723 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:51:21,724 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 06:51:21,725 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 06:51:21,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:51:21,771 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-10 06:51:21,775 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:51:21,981 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 06:51:21,982 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:51:21,982 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:51:21,982 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1460444423] [2022-01-10 06:51:21,982 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1460444423] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:51:21,982 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:51:21,982 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-10 06:51:21,982 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2117593566] [2022-01-10 06:51:21,982 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:51:21,983 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 06:51:21,983 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:51:21,983 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 06:51:21,983 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-01-10 06:51:21,983 INFO L87 Difference]: Start difference. First operand 227 states and 334 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 06:51:22,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:51:22,045 INFO L93 Difference]: Finished difference Result 1035 states and 1570 transitions. [2022-01-10 06:51:22,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-10 06:51:22,046 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 06:51:22,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:51:22,048 INFO L225 Difference]: With dead ends: 1035 [2022-01-10 06:51:22,048 INFO L226 Difference]: Without dead ends: 833 [2022-01-10 06:51:22,049 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 06:51:22,050 INFO L933 BasicCegarLoop]: 72 mSDtfsCounter, 239 mSDsluCounter, 181 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 239 SdHoareTripleChecker+Valid, 253 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 06:51:22,050 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [239 Valid, 253 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 06:51:22,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 833 states. [2022-01-10 06:51:22,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 833 to 627. [2022-01-10 06:51:22,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 627 states, 626 states have (on average 1.4792332268370607) internal successors, (926), 626 states have internal predecessors, (926), 0 states have call successors, (0), 0 states 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 06:51:22,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 627 states to 627 states and 926 transitions. [2022-01-10 06:51:22,068 INFO L78 Accepts]: Start accepts. Automaton has 627 states and 926 transitions. Word has length 40 [2022-01-10 06:51:22,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:51:22,068 INFO L470 AbstractCegarLoop]: Abstraction has 627 states and 926 transitions. [2022-01-10 06:51:22,068 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 06:51:22,068 INFO L276 IsEmpty]: Start isEmpty. Operand 627 states and 926 transitions. [2022-01-10 06:51:22,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-01-10 06:51:22,069 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:51:22,069 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 06:51:22,075 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 06:51:22,275 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 06:51:22,277 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:51:22,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:51:22,278 INFO L85 PathProgramCache]: Analyzing trace with hash -1158041984, now seen corresponding path program 1 times [2022-01-10 06:51:22,278 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:51:22,278 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [875982568] [2022-01-10 06:51:22,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:51:22,278 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:51:22,278 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:51:22,280 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 06:51:22,281 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 06:51:22,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:51:22,319 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-10 06:51:22,320 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:51:22,399 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 06:51:22,399 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:51:22,399 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:51:22,399 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [875982568] [2022-01-10 06:51:22,399 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [875982568] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:51:22,400 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:51:22,400 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 06:51:22,400 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1345989110] [2022-01-10 06:51:22,400 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:51:22,401 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 06:51:22,401 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:51:22,401 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 06:51:22,402 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 06:51:22,402 INFO L87 Difference]: Start difference. First operand 627 states and 926 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 06:51:22,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:51:22,429 INFO L93 Difference]: Finished difference Result 1503 states and 2232 transitions. [2022-01-10 06:51:22,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 06:51:22,429 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 06:51:22,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:51:22,434 INFO L225 Difference]: With dead ends: 1503 [2022-01-10 06:51:22,434 INFO L226 Difference]: Without dead ends: 901 [2022-01-10 06:51:22,435 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 06:51:22,435 INFO L933 BasicCegarLoop]: 93 mSDtfsCounter, 30 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 144 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 06:51:22,435 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 144 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 06:51:22,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 901 states. [2022-01-10 06:51:22,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 901 to 899. [2022-01-10 06:51:22,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 899 states, 898 states have (on average 1.4587973273942094) internal successors, (1310), 898 states have internal predecessors, (1310), 0 states have call successors, (0), 0 states 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 06:51:22,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 899 states to 899 states and 1310 transitions. [2022-01-10 06:51:22,466 INFO L78 Accepts]: Start accepts. Automaton has 899 states and 1310 transitions. Word has length 42 [2022-01-10 06:51:22,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:51:22,466 INFO L470 AbstractCegarLoop]: Abstraction has 899 states and 1310 transitions. [2022-01-10 06:51:22,466 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 06:51:22,466 INFO L276 IsEmpty]: Start isEmpty. Operand 899 states and 1310 transitions. [2022-01-10 06:51:22,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-01-10 06:51:22,468 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:51:22,468 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 06:51:22,489 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 06:51:22,672 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 06:51:22,673 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:51:22,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:51:22,673 INFO L85 PathProgramCache]: Analyzing trace with hash 107012533, now seen corresponding path program 1 times [2022-01-10 06:51:22,673 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:51:22,673 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [150311053] [2022-01-10 06:51:22,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:51:22,674 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:51:22,674 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:51:22,675 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 06:51:22,675 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 06:51:22,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:51:22,723 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-10 06:51:22,724 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:51:22,778 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 06:51:22,779 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:51:22,779 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:51:22,779 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [150311053] [2022-01-10 06:51:22,779 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [150311053] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:51:22,779 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:51:22,779 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-10 06:51:22,779 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [365147201] [2022-01-10 06:51:22,779 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:51:22,780 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 06:51:22,780 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:51:22,780 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 06:51:22,780 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-10 06:51:22,780 INFO L87 Difference]: Start difference. First operand 899 states and 1310 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 06:51:22,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:51:22,846 INFO L93 Difference]: Finished difference Result 1744 states and 2500 transitions. [2022-01-10 06:51:22,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-10 06:51:22,847 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 06:51:22,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:51:22,852 INFO L225 Difference]: With dead ends: 1744 [2022-01-10 06:51:22,853 INFO L226 Difference]: Without dead ends: 1742 [2022-01-10 06:51:22,853 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 06:51:22,853 INFO L933 BasicCegarLoop]: 94 mSDtfsCounter, 139 mSDsluCounter, 227 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 139 SdHoareTripleChecker+Valid, 321 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 06:51:22,854 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [139 Valid, 321 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 06:51:22,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1742 states. [2022-01-10 06:51:22,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1742 to 983. [2022-01-10 06:51:22,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 983 states, 982 states have (on average 1.415478615071283) internal successors, (1390), 982 states have internal predecessors, (1390), 0 states have call successors, (0), 0 states 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 06:51:22,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 983 states to 983 states and 1390 transitions. [2022-01-10 06:51:22,907 INFO L78 Accepts]: Start accepts. Automaton has 983 states and 1390 transitions. Word has length 43 [2022-01-10 06:51:22,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:51:22,908 INFO L470 AbstractCegarLoop]: Abstraction has 983 states and 1390 transitions. [2022-01-10 06:51:22,908 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 06:51:22,908 INFO L276 IsEmpty]: Start isEmpty. Operand 983 states and 1390 transitions. [2022-01-10 06:51:22,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-01-10 06:51:22,909 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:51:22,910 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] [2022-01-10 06:51:22,918 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 06:51:23,116 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 06:51:23,116 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:51:23,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:51:23,117 INFO L85 PathProgramCache]: Analyzing trace with hash -1027002802, now seen corresponding path program 1 times [2022-01-10 06:51:23,117 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:51:23,117 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [844370317] [2022-01-10 06:51:23,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:51:23,117 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:51:23,117 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:51:23,118 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 06:51:23,120 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 06:51:23,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:51:23,163 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-10 06:51:23,164 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:51:23,694 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 06:51:23,695 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 06:51:24,010 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 06:51:24,011 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:51:24,011 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [844370317] [2022-01-10 06:51:24,011 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [844370317] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 06:51:24,011 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 06:51:24,011 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2022-01-10 06:51:24,011 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1512518934] [2022-01-10 06:51:24,011 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 06:51:24,012 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-10 06:51:24,012 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:51:24,012 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-10 06:51:24,012 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2022-01-10 06:51:24,012 INFO L87 Difference]: Start difference. First operand 983 states and 1390 transitions. Second operand has 16 states, 16 states have (on average 6.8125) internal successors, (109), 15 states have internal predecessors, (109), 0 states have call successors, (0), 0 states 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 06:51:24,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:51:24,134 INFO L93 Difference]: Finished difference Result 1679 states and 2390 transitions. [2022-01-10 06:51:24,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-10 06:51:24,135 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 6.8125) internal successors, (109), 15 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have 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 06:51:24,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:51:24,138 INFO L225 Difference]: With dead ends: 1679 [2022-01-10 06:51:24,138 INFO L226 Difference]: Without dead ends: 1005 [2022-01-10 06:51:24,139 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=84, Invalid=296, Unknown=0, NotChecked=0, Total=380 [2022-01-10 06:51:24,140 INFO L933 BasicCegarLoop]: 63 mSDtfsCounter, 81 mSDsluCounter, 501 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 564 SdHoareTripleChecker+Invalid, 109 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 69 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 06:51:24,141 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [81 Valid, 564 Invalid, 109 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 37 Invalid, 0 Unknown, 69 Unchecked, 0.0s Time] [2022-01-10 06:51:24,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1005 states. [2022-01-10 06:51:24,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1005 to 1004. [2022-01-10 06:51:24,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1004 states, 1003 states have (on average 1.4097706879361915) internal successors, (1414), 1003 states have internal predecessors, (1414), 0 states have call successors, (0), 0 states 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 06:51:24,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1004 states to 1004 states and 1414 transitions. [2022-01-10 06:51:24,164 INFO L78 Accepts]: Start accepts. Automaton has 1004 states and 1414 transitions. Word has length 63 [2022-01-10 06:51:24,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:51:24,165 INFO L470 AbstractCegarLoop]: Abstraction has 1004 states and 1414 transitions. [2022-01-10 06:51:24,165 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 6.8125) internal successors, (109), 15 states have internal predecessors, (109), 0 states have call successors, (0), 0 states 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 06:51:24,165 INFO L276 IsEmpty]: Start isEmpty. Operand 1004 states and 1414 transitions. [2022-01-10 06:51:24,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-01-10 06:51:24,166 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:51:24,167 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] [2022-01-10 06:51:24,185 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 06:51:24,373 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 06:51:24,373 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:51:24,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:51:24,374 INFO L85 PathProgramCache]: Analyzing trace with hash -1664145778, now seen corresponding path program 1 times [2022-01-10 06:51:24,374 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:51:24,374 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1183128290] [2022-01-10 06:51:24,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:51:24,374 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:51:24,374 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:51:24,376 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 06:51:24,377 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 06:51:24,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:51:24,425 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-10 06:51:24,426 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:51:25,009 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 06:51:25,010 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 06:51:25,230 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 06:51:25,231 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:51:25,231 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1183128290] [2022-01-10 06:51:25,231 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1183128290] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 06:51:25,231 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 06:51:25,231 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2022-01-10 06:51:25,231 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1109982610] [2022-01-10 06:51:25,231 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 06:51:25,231 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-10 06:51:25,231 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:51:25,232 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-10 06:51:25,232 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2022-01-10 06:51:25,232 INFO L87 Difference]: Start difference. First operand 1004 states and 1414 transitions. Second operand has 16 states, 16 states have (on average 7.1875) internal successors, (115), 15 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 06:51:25,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:51:25,310 INFO L93 Difference]: Finished difference Result 1727 states and 2445 transitions. [2022-01-10 06:51:25,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-10 06:51:25,311 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 7.1875) internal successors, (115), 15 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2022-01-10 06:51:25,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:51:25,314 INFO L225 Difference]: With dead ends: 1727 [2022-01-10 06:51:25,314 INFO L226 Difference]: Without dead ends: 1053 [2022-01-10 06:51:25,314 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=73, Invalid=269, Unknown=0, NotChecked=0, Total=342 [2022-01-10 06:51:25,315 INFO L933 BasicCegarLoop]: 62 mSDtfsCounter, 103 mSDsluCounter, 384 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 446 SdHoareTripleChecker+Invalid, 102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 63 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 06:51:25,315 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [103 Valid, 446 Invalid, 102 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 37 Invalid, 0 Unknown, 63 Unchecked, 0.0s Time] [2022-01-10 06:51:25,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1053 states. [2022-01-10 06:51:25,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1053 to 1014. [2022-01-10 06:51:25,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1014 states, 1013 states have (on average 1.4096742349457059) internal successors, (1428), 1013 states have internal predecessors, (1428), 0 states have call successors, (0), 0 states 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 06:51:25,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1014 states to 1014 states and 1428 transitions. [2022-01-10 06:51:25,339 INFO L78 Accepts]: Start accepts. Automaton has 1014 states and 1428 transitions. Word has length 63 [2022-01-10 06:51:25,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:51:25,339 INFO L470 AbstractCegarLoop]: Abstraction has 1014 states and 1428 transitions. [2022-01-10 06:51:25,340 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 7.1875) internal successors, (115), 15 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 06:51:25,340 INFO L276 IsEmpty]: Start isEmpty. Operand 1014 states and 1428 transitions. [2022-01-10 06:51:25,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-01-10 06:51:25,340 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:51:25,340 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 06:51:25,357 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 06:51:25,546 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 06:51:25,547 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:51:25,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:51:25,547 INFO L85 PathProgramCache]: Analyzing trace with hash -1326352636, now seen corresponding path program 1 times [2022-01-10 06:51:25,547 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:51:25,547 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1416082359] [2022-01-10 06:51:25,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:51:25,548 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:51:25,548 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:51:25,549 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 06:51:25,550 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 06:51:25,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:51:25,603 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-10 06:51:25,604 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:51:25,677 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 06:51:25,677 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:51:25,677 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:51:25,677 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1416082359] [2022-01-10 06:51:25,677 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1416082359] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:51:25,677 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:51:25,677 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 06:51:25,677 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [443312609] [2022-01-10 06:51:25,677 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:51:25,678 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 06:51:25,678 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:51:25,678 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 06:51:25,678 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 06:51:25,678 INFO L87 Difference]: Start difference. First operand 1014 states and 1428 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 06:51:25,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:51:25,703 INFO L93 Difference]: Finished difference Result 1974 states and 2794 transitions. [2022-01-10 06:51:25,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 06:51:25,703 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 06:51:25,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:51:25,706 INFO L225 Difference]: With dead ends: 1974 [2022-01-10 06:51:25,706 INFO L226 Difference]: Without dead ends: 1016 [2022-01-10 06:51:25,707 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 06:51:25,708 INFO L933 BasicCegarLoop]: 98 mSDtfsCounter, 31 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 163 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 06:51:25,708 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 163 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 06:51:25,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1016 states. [2022-01-10 06:51:25,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1016 to 1014. [2022-01-10 06:51:25,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1014 states, 1013 states have (on average 1.3899308983218164) internal successors, (1408), 1013 states have internal predecessors, (1408), 0 states have call successors, (0), 0 states 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 06:51:25,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1014 states to 1014 states and 1408 transitions. [2022-01-10 06:51:25,731 INFO L78 Accepts]: Start accepts. Automaton has 1014 states and 1408 transitions. Word has length 63 [2022-01-10 06:51:25,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:51:25,731 INFO L470 AbstractCegarLoop]: Abstraction has 1014 states and 1408 transitions. [2022-01-10 06:51:25,732 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 06:51:25,732 INFO L276 IsEmpty]: Start isEmpty. Operand 1014 states and 1408 transitions. [2022-01-10 06:51:25,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-01-10 06:51:25,732 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:51:25,732 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] [2022-01-10 06:51:25,738 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 06:51:25,938 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 06:51:25,939 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:51:25,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:51:25,939 INFO L85 PathProgramCache]: Analyzing trace with hash -1825402238, now seen corresponding path program 1 times [2022-01-10 06:51:25,939 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:51:25,940 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1622992149] [2022-01-10 06:51:25,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:51:25,940 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:51:25,940 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:51:25,941 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 06:51:25,941 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 06:51:25,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:51:25,983 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-10 06:51:25,984 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:51:26,053 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 06:51:26,053 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:51:26,053 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:51:26,054 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1622992149] [2022-01-10 06:51:26,054 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1622992149] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:51:26,054 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:51:26,054 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 06:51:26,054 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2033071084] [2022-01-10 06:51:26,054 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:51:26,054 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 06:51:26,054 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:51:26,054 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 06:51:26,055 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 06:51:26,055 INFO L87 Difference]: Start difference. First operand 1014 states and 1408 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 06:51:26,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:51:26,071 INFO L93 Difference]: Finished difference Result 1370 states and 1908 transitions. [2022-01-10 06:51:26,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 06:51:26,071 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 06:51:26,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:51:26,072 INFO L225 Difference]: With dead ends: 1370 [2022-01-10 06:51:26,072 INFO L226 Difference]: Without dead ends: 412 [2022-01-10 06:51:26,073 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 06:51:26,074 INFO L933 BasicCegarLoop]: 94 mSDtfsCounter, 25 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 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 06:51:26,074 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [25 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 06:51:26,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 412 states. [2022-01-10 06:51:26,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 412 to 404. [2022-01-10 06:51:26,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 404 states, 403 states have (on average 1.3548387096774193) internal successors, (546), 403 states have internal predecessors, (546), 0 states have call successors, (0), 0 states 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 06:51:26,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 404 states to 404 states and 546 transitions. [2022-01-10 06:51:26,084 INFO L78 Accepts]: Start accepts. Automaton has 404 states and 546 transitions. Word has length 63 [2022-01-10 06:51:26,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:51:26,084 INFO L470 AbstractCegarLoop]: Abstraction has 404 states and 546 transitions. [2022-01-10 06:51:26,084 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 06:51:26,084 INFO L276 IsEmpty]: Start isEmpty. Operand 404 states and 546 transitions. [2022-01-10 06:51:26,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-01-10 06:51:26,085 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:51:26,085 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] [2022-01-10 06:51:26,091 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2022-01-10 06:51:26,291 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 06:51:26,291 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:51:26,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:51:26,291 INFO L85 PathProgramCache]: Analyzing trace with hash -325402928, now seen corresponding path program 1 times [2022-01-10 06:51:26,292 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:51:26,292 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [405413944] [2022-01-10 06:51:26,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:51:26,292 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:51:26,292 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:51:26,293 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 06:51:26,294 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 06:51:26,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:51:26,336 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 5 conjunts are in the unsatisfiable core [2022-01-10 06:51:26,336 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:51:26,559 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 06:51:26,559 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:51:26,560 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:51:26,560 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [405413944] [2022-01-10 06:51:26,560 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [405413944] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:51:26,560 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:51:26,560 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-10 06:51:26,560 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2128095132] [2022-01-10 06:51:26,560 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:51:26,560 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-10 06:51:26,560 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:51:26,561 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-10 06:51:26,561 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-01-10 06:51:26,561 INFO L87 Difference]: Start difference. First operand 404 states and 546 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 06:51:26,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:51:26,590 INFO L93 Difference]: Finished difference Result 748 states and 1027 transitions. [2022-01-10 06:51:26,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-10 06:51:26,590 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 63 [2022-01-10 06:51:26,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:51:26,591 INFO L225 Difference]: With dead ends: 748 [2022-01-10 06:51:26,591 INFO L226 Difference]: Without dead ends: 404 [2022-01-10 06:51:26,593 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 58 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 06:51:26,594 INFO L933 BasicCegarLoop]: 68 mSDtfsCounter, 22 mSDsluCounter, 71 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 139 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 13 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 06:51:26,594 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 139 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 14 Invalid, 0 Unknown, 13 Unchecked, 0.0s Time] [2022-01-10 06:51:26,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 404 states. [2022-01-10 06:51:26,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 404 to 404. [2022-01-10 06:51:26,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 404 states, 403 states have (on average 1.3523573200992556) internal successors, (545), 403 states have internal predecessors, (545), 0 states have call successors, (0), 0 states 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 06:51:26,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 404 states to 404 states and 545 transitions. [2022-01-10 06:51:26,607 INFO L78 Accepts]: Start accepts. Automaton has 404 states and 545 transitions. Word has length 63 [2022-01-10 06:51:26,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:51:26,608 INFO L470 AbstractCegarLoop]: Abstraction has 404 states and 545 transitions. [2022-01-10 06:51:26,608 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 06:51:26,608 INFO L276 IsEmpty]: Start isEmpty. Operand 404 states and 545 transitions. [2022-01-10 06:51:26,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-01-10 06:51:26,610 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:51:26,610 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] [2022-01-10 06:51:26,635 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (15)] Ended with exit code 0 [2022-01-10 06:51:26,819 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 06:51:26,819 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:51:26,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:51:26,820 INFO L85 PathProgramCache]: Analyzing trace with hash -1871008304, now seen corresponding path program 1 times [2022-01-10 06:51:26,820 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:51:26,820 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [650591331] [2022-01-10 06:51:26,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:51:26,820 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:51:26,821 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:51:26,822 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 06:51:26,839 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 06:51:26,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:51:26,869 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 5 conjunts are in the unsatisfiable core [2022-01-10 06:51:26,870 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:51:27,047 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 06:51:27,048 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:51:27,048 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:51:27,048 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [650591331] [2022-01-10 06:51:27,048 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [650591331] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:51:27,048 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:51:27,048 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-10 06:51:27,048 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1775658787] [2022-01-10 06:51:27,048 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:51:27,048 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-10 06:51:27,049 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:51:27,049 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-10 06:51:27,050 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-01-10 06:51:27,050 INFO L87 Difference]: Start difference. First operand 404 states and 545 transitions. Second operand has 6 states, 6 states have (on average 9.833333333333334) internal successors, (59), 5 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 06:51:27,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:51:27,092 INFO L93 Difference]: Finished difference Result 742 states and 1020 transitions. [2022-01-10 06:51:27,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-10 06:51:27,092 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 9.833333333333334) internal successors, (59), 5 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2022-01-10 06:51:27,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:51:27,093 INFO L225 Difference]: With dead ends: 742 [2022-01-10 06:51:27,094 INFO L226 Difference]: Without dead ends: 394 [2022-01-10 06:51:27,095 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 58 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 06:51:27,096 INFO L933 BasicCegarLoop]: 71 mSDtfsCounter, 15 mSDsluCounter, 132 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 203 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 26 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 06:51:27,096 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 203 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 36 Invalid, 0 Unknown, 26 Unchecked, 0.0s Time] [2022-01-10 06:51:27,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 394 states. [2022-01-10 06:51:27,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 394 to 394. [2022-01-10 06:51:27,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 394 states, 393 states have (on average 1.356234096692112) internal successors, (533), 393 states have internal predecessors, (533), 0 states have call successors, (0), 0 states 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 06:51:27,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 394 states to 394 states and 533 transitions. [2022-01-10 06:51:27,106 INFO L78 Accepts]: Start accepts. Automaton has 394 states and 533 transitions. Word has length 63 [2022-01-10 06:51:27,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:51:27,106 INFO L470 AbstractCegarLoop]: Abstraction has 394 states and 533 transitions. [2022-01-10 06:51:27,106 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.833333333333334) internal successors, (59), 5 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 06:51:27,106 INFO L276 IsEmpty]: Start isEmpty. Operand 394 states and 533 transitions. [2022-01-10 06:51:27,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-01-10 06:51:27,107 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:51:27,107 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:51:27,129 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 06:51:27,313 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 06:51:27,313 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:51:27,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:51:27,314 INFO L85 PathProgramCache]: Analyzing trace with hash -305332922, now seen corresponding path program 1 times [2022-01-10 06:51:27,314 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:51:27,314 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1440350423] [2022-01-10 06:51:27,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:51:27,314 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:51:27,314 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:51:27,316 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 06:51:27,316 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 06:51:27,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:51:27,359 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-10 06:51:27,360 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:51:27,971 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 06:51:27,972 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 06:51:28,244 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 06:51:28,244 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:51:28,244 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1440350423] [2022-01-10 06:51:28,244 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1440350423] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 06:51:28,244 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 06:51:28,244 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2022-01-10 06:51:28,245 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1107261443] [2022-01-10 06:51:28,245 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 06:51:28,245 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-10 06:51:28,245 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:51:28,245 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-10 06:51:28,245 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2022-01-10 06:51:28,246 INFO L87 Difference]: Start difference. First operand 394 states and 533 transitions. Second operand has 16 states, 16 states have (on average 7.5625) internal successors, (121), 15 states have internal predecessors, (121), 0 states have call successors, (0), 0 states 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 06:51:28,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:51:28,338 INFO L93 Difference]: Finished difference Result 746 states and 1032 transitions. [2022-01-10 06:51:28,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-10 06:51:28,338 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 7.5625) internal successors, (121), 15 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 64 [2022-01-10 06:51:28,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:51:28,339 INFO L225 Difference]: With dead ends: 746 [2022-01-10 06:51:28,339 INFO L226 Difference]: Without dead ends: 408 [2022-01-10 06:51:28,340 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=84, Invalid=296, Unknown=0, NotChecked=0, Total=380 [2022-01-10 06:51:28,340 INFO L933 BasicCegarLoop]: 61 mSDtfsCounter, 82 mSDsluCounter, 524 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 585 SdHoareTripleChecker+Invalid, 96 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 57 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 06:51:28,341 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [82 Valid, 585 Invalid, 96 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 36 Invalid, 0 Unknown, 57 Unchecked, 0.0s Time] [2022-01-10 06:51:28,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 408 states. [2022-01-10 06:51:28,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 408 to 406. [2022-01-10 06:51:28,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 406 states, 405 states have (on average 1.3604938271604938) internal successors, (551), 405 states have internal predecessors, (551), 0 states have call successors, (0), 0 states 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 06:51:28,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 406 states to 406 states and 551 transitions. [2022-01-10 06:51:28,351 INFO L78 Accepts]: Start accepts. Automaton has 406 states and 551 transitions. Word has length 64 [2022-01-10 06:51:28,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:51:28,351 INFO L470 AbstractCegarLoop]: Abstraction has 406 states and 551 transitions. [2022-01-10 06:51:28,351 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 7.5625) internal successors, (121), 15 states have internal predecessors, (121), 0 states have call successors, (0), 0 states 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 06:51:28,351 INFO L276 IsEmpty]: Start isEmpty. Operand 406 states and 551 transitions. [2022-01-10 06:51:28,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-01-10 06:51:28,352 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:51:28,352 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] [2022-01-10 06:51:28,358 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 06:51:28,558 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 06:51:28,559 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:51:28,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:51:28,559 INFO L85 PathProgramCache]: Analyzing trace with hash 912652476, now seen corresponding path program 1 times [2022-01-10 06:51:28,560 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:51:28,560 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1982183712] [2022-01-10 06:51:28,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:51:28,560 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:51:28,560 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:51:28,561 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 06:51:28,563 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 06:51:28,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:51:28,606 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-10 06:51:28,607 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:51:28,674 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 06:51:28,674 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:51:28,674 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:51:28,674 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1982183712] [2022-01-10 06:51:28,674 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1982183712] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:51:28,674 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:51:28,674 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 06:51:28,674 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [934947143] [2022-01-10 06:51:28,675 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:51:28,675 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 06:51:28,675 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:51:28,675 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 06:51:28,675 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 06:51:28,675 INFO L87 Difference]: Start difference. First operand 406 states and 551 transitions. Second operand has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 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 06:51:28,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:51:28,686 INFO L93 Difference]: Finished difference Result 578 states and 790 transitions. [2022-01-10 06:51:28,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 06:51:28,687 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 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 64 [2022-01-10 06:51:28,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:51:28,687 INFO L225 Difference]: With dead ends: 578 [2022-01-10 06:51:28,688 INFO L226 Difference]: Without dead ends: 240 [2022-01-10 06:51:28,688 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 62 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 06:51:28,688 INFO L933 BasicCegarLoop]: 88 mSDtfsCounter, 22 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 137 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 06:51:28,688 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 137 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 06:51:28,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2022-01-10 06:51:28,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 238. [2022-01-10 06:51:28,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 238 states, 237 states have (on average 1.3037974683544304) internal successors, (309), 237 states have internal predecessors, (309), 0 states have call successors, (0), 0 states 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 06:51:28,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 238 states to 238 states and 309 transitions. [2022-01-10 06:51:28,694 INFO L78 Accepts]: Start accepts. Automaton has 238 states and 309 transitions. Word has length 64 [2022-01-10 06:51:28,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:51:28,695 INFO L470 AbstractCegarLoop]: Abstraction has 238 states and 309 transitions. [2022-01-10 06:51:28,695 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 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 06:51:28,695 INFO L276 IsEmpty]: Start isEmpty. Operand 238 states and 309 transitions. [2022-01-10 06:51:28,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-01-10 06:51:28,695 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:51:28,695 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 06:51:28,705 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 06:51:28,905 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 06:51:28,906 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:51:28,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:51:28,906 INFO L85 PathProgramCache]: Analyzing trace with hash -1155837115, now seen corresponding path program 1 times [2022-01-10 06:51:28,906 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:51:28,906 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [51693340] [2022-01-10 06:51:28,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:51:28,906 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:51:28,907 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:51:28,908 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 06:51:28,908 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 06:51:28,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:51:28,961 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-10 06:51:28,962 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:51:29,188 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 06:51:29,188 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:51:29,188 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:51:29,188 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [51693340] [2022-01-10 06:51:29,189 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [51693340] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:51:29,189 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:51:29,189 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-10 06:51:29,189 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [591044296] [2022-01-10 06:51:29,189 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:51:29,189 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 06:51:29,189 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:51:29,189 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 06:51:29,189 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-01-10 06:51:29,190 INFO L87 Difference]: Start difference. First operand 238 states and 309 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 06:51:29,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:51:29,238 INFO L93 Difference]: Finished difference Result 474 states and 631 transitions. [2022-01-10 06:51:29,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-10 06:51:29,239 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 65 [2022-01-10 06:51:29,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:51:29,240 INFO L225 Difference]: With dead ends: 474 [2022-01-10 06:51:29,240 INFO L226 Difference]: Without dead ends: 416 [2022-01-10 06:51:29,240 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 61 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 06:51:29,240 INFO L933 BasicCegarLoop]: 137 mSDtfsCounter, 176 mSDsluCounter, 173 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 176 SdHoareTripleChecker+Valid, 310 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 06:51:29,240 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [176 Valid, 310 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 06:51:29,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 416 states. [2022-01-10 06:51:29,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 416 to 354. [2022-01-10 06:51:29,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 354 states, 353 states have (on average 1.3059490084985836) internal successors, (461), 353 states have internal predecessors, (461), 0 states have call successors, (0), 0 states 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 06:51:29,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 354 states to 354 states and 461 transitions. [2022-01-10 06:51:29,250 INFO L78 Accepts]: Start accepts. Automaton has 354 states and 461 transitions. Word has length 65 [2022-01-10 06:51:29,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:51:29,250 INFO L470 AbstractCegarLoop]: Abstraction has 354 states and 461 transitions. [2022-01-10 06:51:29,250 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 06:51:29,250 INFO L276 IsEmpty]: Start isEmpty. Operand 354 states and 461 transitions. [2022-01-10 06:51:29,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-01-10 06:51:29,250 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:51:29,250 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 06:51:29,266 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 06:51:29,457 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 06:51:29,457 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:51:29,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:51:29,457 INFO L85 PathProgramCache]: Analyzing trace with hash 199626664, now seen corresponding path program 1 times [2022-01-10 06:51:29,458 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:51:29,458 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1693913916] [2022-01-10 06:51:29,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:51:29,458 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:51:29,458 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:51:29,460 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 06:51:29,463 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 06:51:29,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:51:29,494 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-10 06:51:29,494 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:51:29,718 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 06:51:29,718 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:51:29,718 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:51:29,718 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1693913916] [2022-01-10 06:51:29,718 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1693913916] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:51:29,718 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:51:29,718 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-10 06:51:29,719 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [669475859] [2022-01-10 06:51:29,719 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:51:29,719 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 06:51:29,719 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:51:29,719 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 06:51:29,719 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-01-10 06:51:29,719 INFO L87 Difference]: Start difference. First operand 354 states and 461 transitions. Second operand has 5 states, 5 states have (on average 12.6) internal successors, (63), 5 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 06:51:29,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:51:29,777 INFO L93 Difference]: Finished difference Result 534 states and 709 transitions. [2022-01-10 06:51:29,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-10 06:51:29,777 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 12.6) internal successors, (63), 5 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 65 [2022-01-10 06:51:29,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:51:29,778 INFO L225 Difference]: With dead ends: 534 [2022-01-10 06:51:29,778 INFO L226 Difference]: Without dead ends: 476 [2022-01-10 06:51:29,779 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 61 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 06:51:29,779 INFO L933 BasicCegarLoop]: 130 mSDtfsCounter, 164 mSDsluCounter, 185 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 164 SdHoareTripleChecker+Valid, 315 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 06:51:29,779 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [164 Valid, 315 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 06:51:29,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 476 states. [2022-01-10 06:51:29,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 476 to 414. [2022-01-10 06:51:29,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 414 states, 413 states have (on average 1.305084745762712) internal successors, (539), 413 states have internal predecessors, (539), 0 states have call successors, (0), 0 states 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 06:51:29,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 414 states to 414 states and 539 transitions. [2022-01-10 06:51:29,791 INFO L78 Accepts]: Start accepts. Automaton has 414 states and 539 transitions. Word has length 65 [2022-01-10 06:51:29,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:51:29,791 INFO L470 AbstractCegarLoop]: Abstraction has 414 states and 539 transitions. [2022-01-10 06:51:29,791 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.6) internal successors, (63), 5 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 06:51:29,791 INFO L276 IsEmpty]: Start isEmpty. Operand 414 states and 539 transitions. [2022-01-10 06:51:29,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-01-10 06:51:29,792 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:51:29,792 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 06:51:29,806 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 06:51:29,998 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 06:51:29,998 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:51:29,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:51:29,998 INFO L85 PathProgramCache]: Analyzing trace with hash -1302732443, now seen corresponding path program 1 times [2022-01-10 06:51:29,999 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:51:29,999 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [836096821] [2022-01-10 06:51:29,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:51:29,999 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:51:29,999 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:51:30,000 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 06:51:30,003 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 06:51:30,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:51:30,046 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-10 06:51:30,047 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:51:30,270 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 06:51:30,270 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:51:30,270 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:51:30,270 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [836096821] [2022-01-10 06:51:30,270 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [836096821] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:51:30,270 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:51:30,270 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-10 06:51:30,271 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [318420127] [2022-01-10 06:51:30,271 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:51:30,271 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 06:51:30,271 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:51:30,271 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 06:51:30,271 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-01-10 06:51:30,271 INFO L87 Difference]: Start difference. First operand 414 states and 539 transitions. Second operand has 5 states, 5 states have (on average 12.4) 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 06:51:30,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:51:30,341 INFO L93 Difference]: Finished difference Result 590 states and 783 transitions. [2022-01-10 06:51:30,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-10 06:51:30,342 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 12.4) 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 06:51:30,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:51:30,344 INFO L225 Difference]: With dead ends: 590 [2022-01-10 06:51:30,344 INFO L226 Difference]: Without dead ends: 420 [2022-01-10 06:51:30,344 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 61 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 06:51:30,347 INFO L933 BasicCegarLoop]: 141 mSDtfsCounter, 180 mSDsluCounter, 182 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 180 SdHoareTripleChecker+Valid, 323 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 06:51:30,347 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [180 Valid, 323 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-10 06:51:30,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 420 states. [2022-01-10 06:51:30,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 420 to 358. [2022-01-10 06:51:30,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 358 states, 357 states have (on average 1.2857142857142858) internal successors, (459), 357 states have internal predecessors, (459), 0 states have call successors, (0), 0 states 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 06:51:30,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 358 states to 358 states and 459 transitions. [2022-01-10 06:51:30,359 INFO L78 Accepts]: Start accepts. Automaton has 358 states and 459 transitions. Word has length 65 [2022-01-10 06:51:30,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:51:30,359 INFO L470 AbstractCegarLoop]: Abstraction has 358 states and 459 transitions. [2022-01-10 06:51:30,359 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.4) 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 06:51:30,359 INFO L276 IsEmpty]: Start isEmpty. Operand 358 states and 459 transitions. [2022-01-10 06:51:30,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-01-10 06:51:30,360 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:51:30,360 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 06:51:30,369 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 06:51:30,566 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 06:51:30,566 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:51:30,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:51:30,567 INFO L85 PathProgramCache]: Analyzing trace with hash -1467200301, now seen corresponding path program 1 times [2022-01-10 06:51:30,567 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:51:30,567 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1188904088] [2022-01-10 06:51:30,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:51:30,567 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:51:30,568 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:51:30,568 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 06:51:30,569 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 06:51:30,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:51:30,609 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 24 conjunts are in the unsatisfiable core [2022-01-10 06:51:30,611 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:51:31,978 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 06:51:31,978 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 06:51:32,771 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 06:51:32,772 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:51:32,772 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1188904088] [2022-01-10 06:51:32,772 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1188904088] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 06:51:32,772 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 06:51:32,772 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 35 [2022-01-10 06:51:32,772 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1786853985] [2022-01-10 06:51:32,772 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 06:51:32,772 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-01-10 06:51:32,773 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:51:32,773 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-01-10 06:51:32,773 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=205, Invalid=985, Unknown=0, NotChecked=0, Total=1190 [2022-01-10 06:51:32,773 INFO L87 Difference]: Start difference. First operand 358 states and 459 transitions. Second operand has 35 states, 35 states have (on average 3.4857142857142858) internal successors, (122), 35 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 06:51:33,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:51:33,144 INFO L93 Difference]: Finished difference Result 497 states and 639 transitions. [2022-01-10 06:51:33,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-01-10 06:51:33,145 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 3.4857142857142858) internal successors, (122), 35 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 66 [2022-01-10 06:51:33,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:51:33,146 INFO L225 Difference]: With dead ends: 497 [2022-01-10 06:51:33,146 INFO L226 Difference]: Without dead ends: 369 [2022-01-10 06:51:33,147 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 401 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=266, Invalid=1140, Unknown=0, NotChecked=0, Total=1406 [2022-01-10 06:51:33,148 INFO L933 BasicCegarLoop]: 60 mSDtfsCounter, 118 mSDsluCounter, 816 mSDsCounter, 0 mSdLazyCounter, 287 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 118 SdHoareTripleChecker+Valid, 876 SdHoareTripleChecker+Invalid, 444 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 287 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 141 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-10 06:51:33,148 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [118 Valid, 876 Invalid, 444 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 287 Invalid, 0 Unknown, 141 Unchecked, 0.2s Time] [2022-01-10 06:51:33,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 369 states. [2022-01-10 06:51:33,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 369 to 344. [2022-01-10 06:51:33,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 344 states, 343 states have (on average 1.2886297376093294) internal successors, (442), 343 states have internal predecessors, (442), 0 states have call successors, (0), 0 states 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 06:51:33,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 344 states to 344 states and 442 transitions. [2022-01-10 06:51:33,160 INFO L78 Accepts]: Start accepts. Automaton has 344 states and 442 transitions. Word has length 66 [2022-01-10 06:51:33,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:51:33,161 INFO L470 AbstractCegarLoop]: Abstraction has 344 states and 442 transitions. [2022-01-10 06:51:33,161 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 3.4857142857142858) internal successors, (122), 35 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 06:51:33,161 INFO L276 IsEmpty]: Start isEmpty. Operand 344 states and 442 transitions. [2022-01-10 06:51:33,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-01-10 06:51:33,162 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:51:33,162 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 06:51:33,181 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 06:51:33,368 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 06:51:33,369 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:51:33,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:51:33,369 INFO L85 PathProgramCache]: Analyzing trace with hash 395112077, now seen corresponding path program 1 times [2022-01-10 06:51:33,370 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:51:33,371 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1275830815] [2022-01-10 06:51:33,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:51:33,371 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:51:33,371 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:51:33,372 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 06:51:33,373 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 06:51:33,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:51:33,418 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 24 conjunts are in the unsatisfiable core [2022-01-10 06:51:33,419 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:51:35,053 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 06:51:35,054 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 06:51:36,087 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 06:51:36,087 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:51:36,087 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1275830815] [2022-01-10 06:51:36,088 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1275830815] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 06:51:36,088 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 06:51:36,088 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 39 [2022-01-10 06:51:36,088 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [620428723] [2022-01-10 06:51:36,088 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 06:51:36,088 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-01-10 06:51:36,088 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:51:36,089 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-01-10 06:51:36,089 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=1249, Unknown=0, NotChecked=0, Total=1482 [2022-01-10 06:51:36,089 INFO L87 Difference]: Start difference. First operand 344 states and 442 transitions. Second operand has 39 states, 39 states have (on average 3.128205128205128) internal successors, (122), 39 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 06:51:36,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:51:36,508 INFO L93 Difference]: Finished difference Result 591 states and 759 transitions. [2022-01-10 06:51:36,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-01-10 06:51:36,510 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 3.128205128205128) internal successors, (122), 39 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 66 [2022-01-10 06:51:36,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:51:36,511 INFO L225 Difference]: With dead ends: 591 [2022-01-10 06:51:36,512 INFO L226 Difference]: Without dead ends: 473 [2022-01-10 06:51:36,512 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 529 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=295, Invalid=1427, Unknown=0, NotChecked=0, Total=1722 [2022-01-10 06:51:36,512 INFO L933 BasicCegarLoop]: 81 mSDtfsCounter, 187 mSDsluCounter, 1044 mSDsCounter, 0 mSdLazyCounter, 284 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 187 SdHoareTripleChecker+Valid, 1125 SdHoareTripleChecker+Invalid, 426 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 284 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 121 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-10 06:51:36,513 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [187 Valid, 1125 Invalid, 426 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 284 Invalid, 0 Unknown, 121 Unchecked, 0.2s Time] [2022-01-10 06:51:36,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 473 states. [2022-01-10 06:51:36,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 473 to 350. [2022-01-10 06:51:36,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 350 states, 349 states have (on average 1.2865329512893984) internal successors, (449), 349 states have internal predecessors, (449), 0 states have call successors, (0), 0 states 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 06:51:36,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 350 states to 350 states and 449 transitions. [2022-01-10 06:51:36,525 INFO L78 Accepts]: Start accepts. Automaton has 350 states and 449 transitions. Word has length 66 [2022-01-10 06:51:36,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:51:36,525 INFO L470 AbstractCegarLoop]: Abstraction has 350 states and 449 transitions. [2022-01-10 06:51:36,525 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 3.128205128205128) internal successors, (122), 39 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 06:51:36,525 INFO L276 IsEmpty]: Start isEmpty. Operand 350 states and 449 transitions. [2022-01-10 06:51:36,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-01-10 06:51:36,526 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:51:36,526 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 06:51:36,532 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 06:51:36,731 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 06:51:36,732 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:51:36,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:51:36,732 INFO L85 PathProgramCache]: Analyzing trace with hash -554564736, now seen corresponding path program 1 times [2022-01-10 06:51:36,732 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:51:36,732 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [843313501] [2022-01-10 06:51:36,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:51:36,732 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:51:36,733 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:51:36,734 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 06:51:36,734 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 06:51:36,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:51:36,775 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-10 06:51:36,776 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:51:38,454 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 06:51:38,455 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 06:51:39,618 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 06:51:39,619 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:51:39,619 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [843313501] [2022-01-10 06:51:39,619 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [843313501] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 06:51:39,619 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 06:51:39,619 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21] total 41 [2022-01-10 06:51:39,619 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1666672597] [2022-01-10 06:51:39,619 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 06:51:39,619 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-01-10 06:51:39,620 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:51:39,620 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-01-10 06:51:39,620 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=1387, Unknown=0, NotChecked=0, Total=1640 [2022-01-10 06:51:39,620 INFO L87 Difference]: Start difference. First operand 350 states and 449 transitions. Second operand has 41 states, 41 states have (on average 3.024390243902439) internal successors, (124), 41 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 06:51:40,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:51:40,054 INFO L93 Difference]: Finished difference Result 602 states and 769 transitions. [2022-01-10 06:51:40,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-01-10 06:51:40,054 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 3.024390243902439) internal successors, (124), 41 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 67 [2022-01-10 06:51:40,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:51:40,055 INFO L225 Difference]: With dead ends: 602 [2022-01-10 06:51:40,055 INFO L226 Difference]: Without dead ends: 484 [2022-01-10 06:51:40,056 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 596 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=336, Invalid=1644, Unknown=0, NotChecked=0, Total=1980 [2022-01-10 06:51:40,057 INFO L933 BasicCegarLoop]: 84 mSDtfsCounter, 178 mSDsluCounter, 1068 mSDsCounter, 0 mSdLazyCounter, 337 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 178 SdHoareTripleChecker+Valid, 1152 SdHoareTripleChecker+Invalid, 440 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 337 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 88 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-10 06:51:40,057 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [178 Valid, 1152 Invalid, 440 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 337 Invalid, 0 Unknown, 88 Unchecked, 0.2s Time] [2022-01-10 06:51:40,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 484 states. [2022-01-10 06:51:40,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 484 to 340. [2022-01-10 06:51:40,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 340 states, 339 states have (on average 1.289085545722714) internal successors, (437), 339 states have internal predecessors, (437), 0 states have call successors, (0), 0 states 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 06:51:40,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 340 states to 340 states and 437 transitions. [2022-01-10 06:51:40,068 INFO L78 Accepts]: Start accepts. Automaton has 340 states and 437 transitions. Word has length 67 [2022-01-10 06:51:40,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:51:40,068 INFO L470 AbstractCegarLoop]: Abstraction has 340 states and 437 transitions. [2022-01-10 06:51:40,068 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 3.024390243902439) internal successors, (124), 41 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 06:51:40,068 INFO L276 IsEmpty]: Start isEmpty. Operand 340 states and 437 transitions. [2022-01-10 06:51:40,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-01-10 06:51:40,068 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:51:40,068 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] [2022-01-10 06:51:40,077 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 06:51:40,274 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 06:51:40,274 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:51:40,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:51:40,275 INFO L85 PathProgramCache]: Analyzing trace with hash -1880011468, now seen corresponding path program 1 times [2022-01-10 06:51:40,275 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:51:40,275 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [479231226] [2022-01-10 06:51:40,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:51:40,275 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:51:40,275 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:51:40,276 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 06:51:40,277 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 06:51:40,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:51:40,316 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 3 conjunts are in the unsatisfiable core [2022-01-10 06:51:40,317 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:51:40,459 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-10 06:51:40,459 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 06:51:40,577 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-10 06:51:40,578 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:51:40,578 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [479231226] [2022-01-10 06:51:40,578 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [479231226] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 06:51:40,578 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 06:51:40,578 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2022-01-10 06:51:40,578 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [985321752] [2022-01-10 06:51:40,578 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 06:51:40,578 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-10 06:51:40,578 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:51:40,578 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-10 06:51:40,579 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-01-10 06:51:40,579 INFO L87 Difference]: Start difference. First operand 340 states and 437 transitions. Second operand has 6 states, 6 states have (on average 20.833333333333332) internal successors, (125), 6 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 06:51:40,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:51:40,616 INFO L93 Difference]: Finished difference Result 937 states and 1221 transitions. [2022-01-10 06:51:40,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-10 06:51:40,617 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 20.833333333333332) internal successors, (125), 6 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 67 [2022-01-10 06:51:40,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:51:40,618 INFO L225 Difference]: With dead ends: 937 [2022-01-10 06:51:40,618 INFO L226 Difference]: Without dead ends: 655 [2022-01-10 06:51:40,619 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 128 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 06:51:40,619 INFO L933 BasicCegarLoop]: 88 mSDtfsCounter, 117 mSDsluCounter, 279 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 367 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 19 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 06:51:40,619 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [117 Valid, 367 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 21 Invalid, 0 Unknown, 19 Unchecked, 0.0s Time] [2022-01-10 06:51:40,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 655 states. [2022-01-10 06:51:40,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 655 to 619. [2022-01-10 06:51:40,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 619 states, 618 states have (on average 1.2896440129449838) internal successors, (797), 618 states have internal predecessors, (797), 0 states have call successors, (0), 0 states 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 06:51:40,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 619 states to 619 states and 797 transitions. [2022-01-10 06:51:40,640 INFO L78 Accepts]: Start accepts. Automaton has 619 states and 797 transitions. Word has length 67 [2022-01-10 06:51:40,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:51:40,640 INFO L470 AbstractCegarLoop]: Abstraction has 619 states and 797 transitions. [2022-01-10 06:51:40,640 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 20.833333333333332) internal successors, (125), 6 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 06:51:40,640 INFO L276 IsEmpty]: Start isEmpty. Operand 619 states and 797 transitions. [2022-01-10 06:51:40,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-01-10 06:51:40,641 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:51:40,641 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] [2022-01-10 06:51:40,649 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 06:51:40,847 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 06:51:40,847 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:51:40,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:51:40,847 INFO L85 PathProgramCache]: Analyzing trace with hash 855365469, now seen corresponding path program 1 times [2022-01-10 06:51:40,847 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:51:40,848 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1871181239] [2022-01-10 06:51:40,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:51:40,848 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:51:40,848 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:51:40,849 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 06:51:40,851 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 06:51:40,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:51:40,896 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 22 conjunts are in the unsatisfiable core [2022-01-10 06:51:40,897 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:51:43,201 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 06:51:43,201 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 06:51:44,752 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 06:51:44,753 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:51:44,753 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1871181239] [2022-01-10 06:51:44,753 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1871181239] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 06:51:44,753 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 06:51:44,753 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 18] total 37 [2022-01-10 06:51:44,753 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1888325335] [2022-01-10 06:51:44,753 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 06:51:44,753 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-01-10 06:51:44,753 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:51:44,754 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-01-10 06:51:44,754 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=1161, Unknown=0, NotChecked=0, Total=1332 [2022-01-10 06:51:44,754 INFO L87 Difference]: Start difference. First operand 619 states and 797 transitions. Second operand has 37 states, 37 states have (on average 3.2972972972972974) internal successors, (122), 37 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 06:51:45,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:51:45,132 INFO L93 Difference]: Finished difference Result 874 states and 1131 transitions. [2022-01-10 06:51:45,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-01-10 06:51:45,140 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 3.2972972972972974) internal successors, (122), 37 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2022-01-10 06:51:45,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:51:45,142 INFO L225 Difference]: With dead ends: 874 [2022-01-10 06:51:45,142 INFO L226 Difference]: Without dead ends: 645 [2022-01-10 06:51:45,143 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 425 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=205, Invalid=1277, Unknown=0, NotChecked=0, Total=1482 [2022-01-10 06:51:45,143 INFO L933 BasicCegarLoop]: 55 mSDtfsCounter, 153 mSDsluCounter, 732 mSDsCounter, 0 mSdLazyCounter, 194 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 153 SdHoareTripleChecker+Valid, 787 SdHoareTripleChecker+Invalid, 324 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 194 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 114 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 06:51:45,143 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [153 Valid, 787 Invalid, 324 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 194 Invalid, 0 Unknown, 114 Unchecked, 0.1s Time] [2022-01-10 06:51:45,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 645 states. [2022-01-10 06:51:45,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 645 to 630. [2022-01-10 06:51:45,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 630 states, 629 states have (on average 1.287758346581876) internal successors, (810), 629 states have internal predecessors, (810), 0 states have call successors, (0), 0 states 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 06:51:45,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 630 states to 630 states and 810 transitions. [2022-01-10 06:51:45,169 INFO L78 Accepts]: Start accepts. Automaton has 630 states and 810 transitions. Word has length 67 [2022-01-10 06:51:45,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:51:45,170 INFO L470 AbstractCegarLoop]: Abstraction has 630 states and 810 transitions. [2022-01-10 06:51:45,170 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 3.2972972972972974) internal successors, (122), 37 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 06:51:45,170 INFO L276 IsEmpty]: Start isEmpty. Operand 630 states and 810 transitions. [2022-01-10 06:51:45,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-01-10 06:51:45,171 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:51:45,171 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] [2022-01-10 06:51:45,177 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (26)] Ended with exit code 0 [2022-01-10 06:51:45,377 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 06:51:45,377 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:51:45,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:51:45,377 INFO L85 PathProgramCache]: Analyzing trace with hash 1480155338, now seen corresponding path program 1 times [2022-01-10 06:51:45,378 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:51:45,378 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1015433188] [2022-01-10 06:51:45,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:51:45,378 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:51:45,378 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:51:45,379 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 06:51:45,380 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 06:51:45,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:51:45,420 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 9 conjunts are in the unsatisfiable core [2022-01-10 06:51:45,421 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:51:46,209 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 06:51:46,209 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 06:51:46,420 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 06:51:46,420 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:51:46,420 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1015433188] [2022-01-10 06:51:46,421 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1015433188] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 06:51:46,421 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 06:51:46,421 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 17 [2022-01-10 06:51:46,421 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1309759693] [2022-01-10 06:51:46,421 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 06:51:46,421 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-10 06:51:46,421 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:51:46,421 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-10 06:51:46,421 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2022-01-10 06:51:46,422 INFO L87 Difference]: Start difference. First operand 630 states and 810 transitions. Second operand has 17 states, 17 states have (on average 7.0588235294117645) internal successors, (120), 17 states have internal predecessors, (120), 0 states have call successors, (0), 0 states 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 06:51:46,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:51:46,494 INFO L93 Difference]: Finished difference Result 803 states and 1040 transitions. [2022-01-10 06:51:46,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-10 06:51:46,494 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 7.0588235294117645) internal successors, (120), 17 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have 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 06:51:46,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:51:46,495 INFO L225 Difference]: With dead ends: 803 [2022-01-10 06:51:46,495 INFO L226 Difference]: Without dead ends: 574 [2022-01-10 06:51:46,496 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 119 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 06:51:46,496 INFO L933 BasicCegarLoop]: 68 mSDtfsCounter, 37 mSDsluCounter, 738 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 806 SdHoareTripleChecker+Invalid, 144 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 76 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 06:51:46,497 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [37 Valid, 806 Invalid, 144 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 65 Invalid, 0 Unknown, 76 Unchecked, 0.0s Time] [2022-01-10 06:51:46,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 574 states. [2022-01-10 06:51:46,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 574 to 563. [2022-01-10 06:51:46,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 563 states, 562 states have (on average 1.282918149466192) internal successors, (721), 562 states have internal predecessors, (721), 0 states have call successors, (0), 0 states 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 06:51:46,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 563 states to 563 states and 721 transitions. [2022-01-10 06:51:46,515 INFO L78 Accepts]: Start accepts. Automaton has 563 states and 721 transitions. Word has length 68 [2022-01-10 06:51:46,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:51:46,515 INFO L470 AbstractCegarLoop]: Abstraction has 563 states and 721 transitions. [2022-01-10 06:51:46,515 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 7.0588235294117645) internal successors, (120), 17 states have internal predecessors, (120), 0 states have call successors, (0), 0 states 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 06:51:46,515 INFO L276 IsEmpty]: Start isEmpty. Operand 563 states and 721 transitions. [2022-01-10 06:51:46,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-01-10 06:51:46,515 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:51:46,515 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] [2022-01-10 06:51:46,522 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 06:51:46,721 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 06:51:46,722 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:51:46,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:51:46,722 INFO L85 PathProgramCache]: Analyzing trace with hash -140810977, now seen corresponding path program 1 times [2022-01-10 06:51:46,722 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:51:46,722 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1776176430] [2022-01-10 06:51:46,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:51:46,722 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:51:46,723 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:51:46,724 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 06:51:46,725 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 06:51:46,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:51:46,764 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 3 conjunts are in the unsatisfiable core [2022-01-10 06:51:46,765 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:51:46,916 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 06:51:46,916 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 06:51:47,028 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 06:51:47,028 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:51:47,028 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1776176430] [2022-01-10 06:51:47,028 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1776176430] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 06:51:47,028 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 06:51:47,028 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2022-01-10 06:51:47,028 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1185517858] [2022-01-10 06:51:47,028 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 06:51:47,029 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-10 06:51:47,029 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:51:47,030 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-10 06:51:47,030 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-01-10 06:51:47,030 INFO L87 Difference]: Start difference. First operand 563 states and 721 transitions. Second operand has 6 states, 6 states have (on average 21.166666666666668) internal successors, (127), 6 states have internal predecessors, (127), 0 states have call successors, (0), 0 states 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 06:51:47,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:51:47,060 INFO L93 Difference]: Finished difference Result 1155 states and 1494 transitions. [2022-01-10 06:51:47,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-10 06:51:47,061 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 21.166666666666668) internal successors, (127), 6 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have 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 06:51:47,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:51:47,062 INFO L225 Difference]: With dead ends: 1155 [2022-01-10 06:51:47,062 INFO L226 Difference]: Without dead ends: 681 [2022-01-10 06:51:47,063 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-01-10 06:51:47,063 INFO L933 BasicCegarLoop]: 105 mSDtfsCounter, 117 mSDsluCounter, 203 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 308 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 10 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 06:51:47,064 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [117 Valid, 308 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 13 Invalid, 0 Unknown, 10 Unchecked, 0.0s Time] [2022-01-10 06:51:47,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 681 states. [2022-01-10 06:51:47,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 681 to 559. [2022-01-10 06:51:47,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 559 states, 558 states have (on average 1.2813620071684588) internal successors, (715), 558 states have internal predecessors, (715), 0 states have call successors, (0), 0 states 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 06:51:47,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 559 states to 559 states and 715 transitions. [2022-01-10 06:51:47,084 INFO L78 Accepts]: Start accepts. Automaton has 559 states and 715 transitions. Word has length 68 [2022-01-10 06:51:47,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:51:47,084 INFO L470 AbstractCegarLoop]: Abstraction has 559 states and 715 transitions. [2022-01-10 06:51:47,084 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 21.166666666666668) internal successors, (127), 6 states have internal predecessors, (127), 0 states have call successors, (0), 0 states 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 06:51:47,084 INFO L276 IsEmpty]: Start isEmpty. Operand 559 states and 715 transitions. [2022-01-10 06:51:47,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2022-01-10 06:51:47,084 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:51:47,085 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:51:47,093 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 06:51:47,291 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 06:51:47,292 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:51:47,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:51:47,292 INFO L85 PathProgramCache]: Analyzing trace with hash 1751652021, now seen corresponding path program 1 times [2022-01-10 06:51:47,292 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:51:47,292 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [742236538] [2022-01-10 06:51:47,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:51:47,293 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:51:47,293 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:51:47,294 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 06:51:47,295 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 06:51:47,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:51:47,343 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 3 conjunts are in the unsatisfiable core [2022-01-10 06:51:47,344 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:51:47,555 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 8 proven. 29 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-01-10 06:51:47,555 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 06:51:47,704 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 8 proven. 29 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-01-10 06:51:47,704 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:51:47,704 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [742236538] [2022-01-10 06:51:47,704 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [742236538] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 06:51:47,704 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 06:51:47,704 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2022-01-10 06:51:47,704 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [998655525] [2022-01-10 06:51:47,704 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 06:51:47,704 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-10 06:51:47,705 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:51:47,705 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-10 06:51:47,705 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-01-10 06:51:47,705 INFO L87 Difference]: Start difference. First operand 559 states and 715 transitions. Second operand has 6 states, 6 states have (on average 26.0) internal successors, (156), 6 states have internal predecessors, (156), 0 states have call successors, (0), 0 states 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 06:51:47,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:51:47,747 INFO L93 Difference]: Finished difference Result 1039 states and 1339 transitions. [2022-01-10 06:51:47,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-10 06:51:47,748 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 26.0) internal successors, (156), 6 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 87 [2022-01-10 06:51:47,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:51:47,749 INFO L225 Difference]: With dead ends: 1039 [2022-01-10 06:51:47,749 INFO L226 Difference]: Without dead ends: 565 [2022-01-10 06:51:47,750 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 168 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 06:51:47,750 INFO L933 BasicCegarLoop]: 79 mSDtfsCounter, 80 mSDsluCounter, 181 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 260 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 5 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 06:51:47,750 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [80 Valid, 260 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 17 Invalid, 0 Unknown, 5 Unchecked, 0.0s Time] [2022-01-10 06:51:47,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 565 states. [2022-01-10 06:51:47,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 565 to 533. [2022-01-10 06:51:47,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 533 states, 532 states have (on average 1.2650375939849625) internal successors, (673), 532 states have internal predecessors, (673), 0 states have call successors, (0), 0 states 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 06:51:47,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 533 states to 533 states and 673 transitions. [2022-01-10 06:51:47,768 INFO L78 Accepts]: Start accepts. Automaton has 533 states and 673 transitions. Word has length 87 [2022-01-10 06:51:47,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:51:47,768 INFO L470 AbstractCegarLoop]: Abstraction has 533 states and 673 transitions. [2022-01-10 06:51:47,768 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 26.0) internal successors, (156), 6 states have internal predecessors, (156), 0 states have call successors, (0), 0 states 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 06:51:47,768 INFO L276 IsEmpty]: Start isEmpty. Operand 533 states and 673 transitions. [2022-01-10 06:51:47,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2022-01-10 06:51:47,769 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:51:47,769 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 06:51:47,779 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 06:51:47,975 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 06:51:47,976 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:51:47,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:51:47,976 INFO L85 PathProgramCache]: Analyzing trace with hash -537056078, now seen corresponding path program 1 times [2022-01-10 06:51:47,976 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:51:47,976 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1426492323] [2022-01-10 06:51:47,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:51:47,977 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:51:47,977 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:51:47,978 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 06:51:47,978 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 06:51:48,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:51:48,041 INFO L263 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 10 conjunts are in the unsatisfiable core [2022-01-10 06:51:48,042 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:51:48,809 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 66 proven. 20 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-01-10 06:51:48,809 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 06:51:49,190 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 66 proven. 20 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-01-10 06:51:49,190 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:51:49,190 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1426492323] [2022-01-10 06:51:49,190 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1426492323] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 06:51:49,191 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 06:51:49,191 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2022-01-10 06:51:49,191 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1559493412] [2022-01-10 06:51:49,191 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 06:51:49,191 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-10 06:51:49,191 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:51:49,191 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-10 06:51:49,191 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=315, Unknown=0, NotChecked=0, Total=380 [2022-01-10 06:51:49,192 INFO L87 Difference]: Start difference. First operand 533 states and 673 transitions. Second operand has 20 states, 20 states have (on average 8.65) internal successors, (173), 19 states have internal predecessors, (173), 0 states have call successors, (0), 0 states 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 06:51:49,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:51:49,330 INFO L93 Difference]: Finished difference Result 1018 states and 1297 transitions. [2022-01-10 06:51:49,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-10 06:51:49,330 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 8.65) internal successors, (173), 19 states have internal predecessors, (173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 110 [2022-01-10 06:51:49,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:51:49,332 INFO L225 Difference]: With dead ends: 1018 [2022-01-10 06:51:49,332 INFO L226 Difference]: Without dead ends: 558 [2022-01-10 06:51:49,332 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 222 GetRequests, 200 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=104, Invalid=448, Unknown=0, NotChecked=0, Total=552 [2022-01-10 06:51:49,333 INFO L933 BasicCegarLoop]: 68 mSDtfsCounter, 133 mSDsluCounter, 631 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 133 SdHoareTripleChecker+Valid, 699 SdHoareTripleChecker+Invalid, 142 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 78 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 06:51:49,333 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [133 Valid, 699 Invalid, 142 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 59 Invalid, 0 Unknown, 78 Unchecked, 0.0s Time] [2022-01-10 06:51:49,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 558 states. [2022-01-10 06:51:49,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 558 to 558. [2022-01-10 06:51:49,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 558 states, 557 states have (on average 1.2567324955116697) internal successors, (700), 557 states have internal predecessors, (700), 0 states have call successors, (0), 0 states 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 06:51:49,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 558 states to 558 states and 700 transitions. [2022-01-10 06:51:49,352 INFO L78 Accepts]: Start accepts. Automaton has 558 states and 700 transitions. Word has length 110 [2022-01-10 06:51:49,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:51:49,352 INFO L470 AbstractCegarLoop]: Abstraction has 558 states and 700 transitions. [2022-01-10 06:51:49,352 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 8.65) internal successors, (173), 19 states have internal predecessors, (173), 0 states have call successors, (0), 0 states 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 06:51:49,352 INFO L276 IsEmpty]: Start isEmpty. Operand 558 states and 700 transitions. [2022-01-10 06:51:49,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2022-01-10 06:51:49,352 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:51:49,353 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 06:51:49,359 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (30)] Forceful destruction successful, exit code 0 [2022-01-10 06:51:49,559 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 06:51:49,559 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:51:49,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:51:49,560 INFO L85 PathProgramCache]: Analyzing trace with hash -960702800, now seen corresponding path program 1 times [2022-01-10 06:51:49,560 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:51:49,560 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [836214869] [2022-01-10 06:51:49,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:51:49,560 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:51:49,560 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:51:49,561 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 06:51:49,562 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 06:51:49,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:51:49,620 INFO L263 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 13 conjunts are in the unsatisfiable core [2022-01-10 06:51:49,622 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:51:50,774 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 39 proven. 58 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 06:51:50,774 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 06:51:51,143 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 39 proven. 58 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 06:51:51,144 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:51:51,144 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [836214869] [2022-01-10 06:51:51,144 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [836214869] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 06:51:51,144 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 06:51:51,144 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 25 [2022-01-10 06:51:51,144 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [547826090] [2022-01-10 06:51:51,144 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 06:51:51,144 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-10 06:51:51,144 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:51:51,146 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-10 06:51:51,151 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=567, Unknown=0, NotChecked=0, Total=650 [2022-01-10 06:51:51,151 INFO L87 Difference]: Start difference. First operand 558 states and 700 transitions. Second operand has 26 states, 26 states have (on average 7.730769230769231) internal successors, (201), 25 states have internal predecessors, (201), 0 states have call successors, (0), 0 states 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 06:51:51,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:51:51,278 INFO L93 Difference]: Finished difference Result 1020 states and 1288 transitions. [2022-01-10 06:51:51,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-01-10 06:51:51,278 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 7.730769230769231) internal successors, (201), 25 states have internal predecessors, (201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 110 [2022-01-10 06:51:51,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:51:51,280 INFO L225 Difference]: With dead ends: 1020 [2022-01-10 06:51:51,280 INFO L226 Difference]: Without dead ends: 605 [2022-01-10 06:51:51,280 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 222 GetRequests, 194 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 201 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=119, Invalid=751, Unknown=0, NotChecked=0, Total=870 [2022-01-10 06:51:51,281 INFO L933 BasicCegarLoop]: 77 mSDtfsCounter, 152 mSDsluCounter, 977 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 152 SdHoareTripleChecker+Valid, 1054 SdHoareTripleChecker+Invalid, 111 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 74 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 06:51:51,281 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [152 Valid, 1054 Invalid, 111 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 34 Invalid, 0 Unknown, 74 Unchecked, 0.0s Time] [2022-01-10 06:51:51,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 605 states. [2022-01-10 06:51:51,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 605 to 605. [2022-01-10 06:51:51,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 605 states, 604 states have (on average 1.2417218543046358) internal successors, (750), 604 states have internal predecessors, (750), 0 states have call successors, (0), 0 states 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 06:51:51,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 605 states to 605 states and 750 transitions. [2022-01-10 06:51:51,301 INFO L78 Accepts]: Start accepts. Automaton has 605 states and 750 transitions. Word has length 110 [2022-01-10 06:51:51,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:51:51,301 INFO L470 AbstractCegarLoop]: Abstraction has 605 states and 750 transitions. [2022-01-10 06:51:51,301 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 7.730769230769231) internal successors, (201), 25 states have internal predecessors, (201), 0 states have call successors, (0), 0 states 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 06:51:51,302 INFO L276 IsEmpty]: Start isEmpty. Operand 605 states and 750 transitions. [2022-01-10 06:51:51,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2022-01-10 06:51:51,305 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:51:51,305 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 06:51:51,323 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (31)] Forceful destruction successful, exit code 0 [2022-01-10 06:51:51,511 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 06:51:51,512 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:51:51,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:51:51,512 INFO L85 PathProgramCache]: Analyzing trace with hash 925220592, now seen corresponding path program 1 times [2022-01-10 06:51:51,512 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:51:51,512 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [989721631] [2022-01-10 06:51:51,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:51:51,512 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:51:51,513 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:51:51,513 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 06:51:51,514 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 06:51:51,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:51:51,569 INFO L263 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 13 conjunts are in the unsatisfiable core [2022-01-10 06:51:51,570 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:51:52,721 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 30 proven. 67 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 06:51:52,721 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 06:51:53,143 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 30 proven. 67 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 06:51:53,143 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:51:53,143 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [989721631] [2022-01-10 06:51:53,143 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [989721631] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 06:51:53,143 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 06:51:53,143 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 25 [2022-01-10 06:51:53,144 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1618288918] [2022-01-10 06:51:53,144 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 06:51:53,144 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-10 06:51:53,144 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:51:53,144 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-10 06:51:53,144 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=567, Unknown=0, NotChecked=0, Total=650 [2022-01-10 06:51:53,145 INFO L87 Difference]: Start difference. First operand 605 states and 750 transitions. Second operand has 26 states, 26 states have (on average 7.961538461538462) internal successors, (207), 25 states have internal predecessors, (207), 0 states have call successors, (0), 0 states 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 06:51:53,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:51:53,271 INFO L93 Difference]: Finished difference Result 1076 states and 1353 transitions. [2022-01-10 06:51:53,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-01-10 06:51:53,271 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 7.961538461538462) internal successors, (207), 25 states have internal predecessors, (207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 110 [2022-01-10 06:51:53,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:51:53,273 INFO L225 Difference]: With dead ends: 1076 [2022-01-10 06:51:53,273 INFO L226 Difference]: Without dead ends: 667 [2022-01-10 06:51:53,274 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 222 GetRequests, 194 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 06:51:53,274 INFO L933 BasicCegarLoop]: 82 mSDtfsCounter, 128 mSDsluCounter, 1353 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 128 SdHoareTripleChecker+Valid, 1435 SdHoareTripleChecker+Invalid, 147 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 111 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 06:51:53,274 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [128 Valid, 1435 Invalid, 147 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 33 Invalid, 0 Unknown, 111 Unchecked, 0.0s Time] [2022-01-10 06:51:53,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 667 states. [2022-01-10 06:51:53,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 667 to 657. [2022-01-10 06:51:53,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 657 states, 656 states have (on average 1.233231707317073) internal successors, (809), 656 states have internal predecessors, (809), 0 states have call successors, (0), 0 states 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 06:51:53,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 657 states to 657 states and 809 transitions. [2022-01-10 06:51:53,297 INFO L78 Accepts]: Start accepts. Automaton has 657 states and 809 transitions. Word has length 110 [2022-01-10 06:51:53,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:51:53,297 INFO L470 AbstractCegarLoop]: Abstraction has 657 states and 809 transitions. [2022-01-10 06:51:53,297 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 7.961538461538462) internal successors, (207), 25 states have internal predecessors, (207), 0 states have call successors, (0), 0 states 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 06:51:53,297 INFO L276 IsEmpty]: Start isEmpty. Operand 657 states and 809 transitions. [2022-01-10 06:51:53,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2022-01-10 06:51:53,298 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:51:53,298 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 06:51:53,305 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (32)] Forceful destruction successful, exit code 0 [2022-01-10 06:51:53,505 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 06:51:53,505 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:51:53,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:51:53,505 INFO L85 PathProgramCache]: Analyzing trace with hash -1096752478, now seen corresponding path program 1 times [2022-01-10 06:51:53,506 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:51:53,506 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1744688076] [2022-01-10 06:51:53,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:51:53,506 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:51:53,506 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:51:53,507 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 06:51:53,508 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 06:51:53,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:51:53,563 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 13 conjunts are in the unsatisfiable core [2022-01-10 06:51:53,565 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:51:54,933 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 16 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 06:51:54,933 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 06:51:55,284 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 16 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 06:51:55,284 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:51:55,284 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1744688076] [2022-01-10 06:51:55,284 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1744688076] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 06:51:55,284 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 06:51:55,284 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 25 [2022-01-10 06:51:55,284 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [454742059] [2022-01-10 06:51:55,284 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 06:51:55,285 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-10 06:51:55,285 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:51:55,285 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-10 06:51:55,285 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=567, Unknown=0, NotChecked=0, Total=650 [2022-01-10 06:51:55,286 INFO L87 Difference]: Start difference. First operand 657 states and 809 transitions. Second operand has 26 states, 26 states have (on average 8.192307692307692) internal successors, (213), 25 states have internal predecessors, (213), 0 states have call successors, (0), 0 states 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 06:51:55,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:51:55,463 INFO L93 Difference]: Finished difference Result 1242 states and 1535 transitions. [2022-01-10 06:51:55,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-01-10 06:51:55,463 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 8.192307692307692) internal successors, (213), 25 states have internal predecessors, (213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 110 [2022-01-10 06:51:55,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:51:55,465 INFO L225 Difference]: With dead ends: 1242 [2022-01-10 06:51:55,465 INFO L226 Difference]: Without dead ends: 845 [2022-01-10 06:51:55,466 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 222 GetRequests, 194 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 201 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=127, Invalid=743, Unknown=0, NotChecked=0, Total=870 [2022-01-10 06:51:55,466 INFO L933 BasicCegarLoop]: 84 mSDtfsCounter, 209 mSDsluCounter, 1030 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 209 SdHoareTripleChecker+Valid, 1114 SdHoareTripleChecker+Invalid, 155 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 102 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 06:51:55,466 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [209 Valid, 1114 Invalid, 155 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 47 Invalid, 0 Unknown, 102 Unchecked, 0.0s Time] [2022-01-10 06:51:55,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 845 states. [2022-01-10 06:51:55,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 845 to 845. [2022-01-10 06:51:55,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 845 states, 844 states have (on average 1.2097156398104265) internal successors, (1021), 844 states have internal predecessors, (1021), 0 states have call successors, (0), 0 states 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 06:51:55,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 845 states to 845 states and 1021 transitions. [2022-01-10 06:51:55,499 INFO L78 Accepts]: Start accepts. Automaton has 845 states and 1021 transitions. Word has length 110 [2022-01-10 06:51:55,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:51:55,499 INFO L470 AbstractCegarLoop]: Abstraction has 845 states and 1021 transitions. [2022-01-10 06:51:55,500 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 8.192307692307692) internal successors, (213), 25 states have internal predecessors, (213), 0 states have call successors, (0), 0 states 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 06:51:55,500 INFO L276 IsEmpty]: Start isEmpty. Operand 845 states and 1021 transitions. [2022-01-10 06:51:55,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2022-01-10 06:51:55,500 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:51:55,501 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 06:51:55,523 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (33)] Forceful destruction successful, exit code 0 [2022-01-10 06:51:55,707 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 06:51:55,707 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:51:55,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:51:55,708 INFO L85 PathProgramCache]: Analyzing trace with hash -1033089358, now seen corresponding path program 1 times [2022-01-10 06:51:55,708 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:51:55,708 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1557158127] [2022-01-10 06:51:55,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:51:55,708 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:51:55,708 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:51:55,709 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 06:51:55,709 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 06:51:55,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:51:55,766 INFO L263 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 10 conjunts are in the unsatisfiable core [2022-01-10 06:51:55,768 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:51:56,728 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 58 proven. 32 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-01-10 06:51:56,728 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 06:51:57,075 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 58 proven. 32 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-01-10 06:51:57,075 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:51:57,075 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1557158127] [2022-01-10 06:51:57,075 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1557158127] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 06:51:57,075 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 06:51:57,076 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2022-01-10 06:51:57,076 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1070107936] [2022-01-10 06:51:57,076 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 06:51:57,076 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-10 06:51:57,076 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:51:57,076 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-10 06:51:57,076 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=315, Unknown=0, NotChecked=0, Total=380 [2022-01-10 06:51:57,077 INFO L87 Difference]: Start difference. First operand 845 states and 1021 transitions. Second operand has 20 states, 20 states have (on average 9.15) internal successors, (183), 19 states have internal predecessors, (183), 0 states have call successors, (0), 0 states 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 06:51:57,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:51:57,197 INFO L93 Difference]: Finished difference Result 1297 states and 1607 transitions. [2022-01-10 06:51:57,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-10 06:51:57,198 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 9.15) internal successors, (183), 19 states have internal predecessors, (183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 110 [2022-01-10 06:51:57,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:51:57,200 INFO L225 Difference]: With dead ends: 1297 [2022-01-10 06:51:57,200 INFO L226 Difference]: Without dead ends: 845 [2022-01-10 06:51:57,200 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 222 GetRequests, 200 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=101, Invalid=451, Unknown=0, NotChecked=0, Total=552 [2022-01-10 06:51:57,201 INFO L933 BasicCegarLoop]: 70 mSDtfsCounter, 95 mSDsluCounter, 579 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 95 SdHoareTripleChecker+Valid, 649 SdHoareTripleChecker+Invalid, 117 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 71 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 06:51:57,201 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [95 Valid, 649 Invalid, 117 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 42 Invalid, 0 Unknown, 71 Unchecked, 0.0s Time] [2022-01-10 06:51:57,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 845 states. [2022-01-10 06:51:57,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 845 to 845. [2022-01-10 06:51:57,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 845 states, 844 states have (on average 1.2049763033175356) internal successors, (1017), 844 states have internal predecessors, (1017), 0 states have call successors, (0), 0 states 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 06:51:57,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 845 states to 845 states and 1017 transitions. [2022-01-10 06:51:57,233 INFO L78 Accepts]: Start accepts. Automaton has 845 states and 1017 transitions. Word has length 110 [2022-01-10 06:51:57,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:51:57,233 INFO L470 AbstractCegarLoop]: Abstraction has 845 states and 1017 transitions. [2022-01-10 06:51:57,233 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 9.15) internal successors, (183), 19 states have internal predecessors, (183), 0 states have call successors, (0), 0 states 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 06:51:57,233 INFO L276 IsEmpty]: Start isEmpty. Operand 845 states and 1017 transitions. [2022-01-10 06:51:57,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2022-01-10 06:51:57,234 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:51:57,234 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 06:51:57,240 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 06:51:57,440 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 06:51:57,441 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:51:57,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:51:57,441 INFO L85 PathProgramCache]: Analyzing trace with hash -301171278, now seen corresponding path program 1 times [2022-01-10 06:51:57,441 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:51:57,441 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [952594016] [2022-01-10 06:51:57,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:51:57,442 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:51:57,442 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:51:57,443 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 06:51:57,444 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 06:51:57,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:51:57,512 INFO L263 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 10 conjunts are in the unsatisfiable core [2022-01-10 06:51:57,514 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:51:58,391 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 62 proven. 26 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-01-10 06:51:58,392 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 06:51:58,695 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 62 proven. 26 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-01-10 06:51:58,695 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:51:58,695 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [952594016] [2022-01-10 06:51:58,695 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [952594016] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 06:51:58,695 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 06:51:58,695 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2022-01-10 06:51:58,695 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [154795992] [2022-01-10 06:51:58,695 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 06:51:58,696 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-10 06:51:58,696 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:51:58,696 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-10 06:51:58,696 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=315, Unknown=0, NotChecked=0, Total=380 [2022-01-10 06:51:58,696 INFO L87 Difference]: Start difference. First operand 845 states and 1017 transitions. Second operand has 20 states, 20 states have (on average 8.9) internal successors, (178), 19 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 06:51:58,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:51:58,839 INFO L93 Difference]: Finished difference Result 1301 states and 1608 transitions. [2022-01-10 06:51:58,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-10 06:51:58,839 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 8.9) internal successors, (178), 19 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 110 [2022-01-10 06:51:58,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:51:58,841 INFO L225 Difference]: With dead ends: 1301 [2022-01-10 06:51:58,841 INFO L226 Difference]: Without dead ends: 845 [2022-01-10 06:51:58,842 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 224 GetRequests, 201 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=115, Invalid=485, Unknown=0, NotChecked=0, Total=600 [2022-01-10 06:51:58,842 INFO L933 BasicCegarLoop]: 69 mSDtfsCounter, 100 mSDsluCounter, 642 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 711 SdHoareTripleChecker+Invalid, 125 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 73 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 06:51:58,842 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [100 Valid, 711 Invalid, 125 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 47 Invalid, 0 Unknown, 73 Unchecked, 0.0s Time] [2022-01-10 06:51:58,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 845 states. [2022-01-10 06:51:58,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 845 to 845. [2022-01-10 06:51:58,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 845 states, 844 states have (on average 1.2002369668246446) internal successors, (1013), 844 states have internal predecessors, (1013), 0 states have call successors, (0), 0 states 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 06:51:58,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 845 states to 845 states and 1013 transitions. [2022-01-10 06:51:58,874 INFO L78 Accepts]: Start accepts. Automaton has 845 states and 1013 transitions. Word has length 110 [2022-01-10 06:51:58,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:51:58,874 INFO L470 AbstractCegarLoop]: Abstraction has 845 states and 1013 transitions. [2022-01-10 06:51:58,874 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 8.9) internal successors, (178), 19 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 06:51:58,875 INFO L276 IsEmpty]: Start isEmpty. Operand 845 states and 1013 transitions. [2022-01-10 06:51:58,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2022-01-10 06:51:58,875 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:51:58,875 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 06:51:58,882 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 06:51:59,082 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 06:51:59,082 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:51:59,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:51:59,083 INFO L85 PathProgramCache]: Analyzing trace with hash 967631141, now seen corresponding path program 1 times [2022-01-10 06:51:59,083 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:51:59,083 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1239227494] [2022-01-10 06:51:59,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:51:59,083 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:51:59,083 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:51:59,084 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 06:51:59,085 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 06:51:59,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:51:59,138 INFO L263 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 5 conjunts are in the unsatisfiable core [2022-01-10 06:51:59,139 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:51:59,551 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 79 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-01-10 06:51:59,552 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:51:59,552 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:51:59,552 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1239227494] [2022-01-10 06:51:59,552 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1239227494] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:51:59,552 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:51:59,552 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-10 06:51:59,552 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [237767376] [2022-01-10 06:51:59,552 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:51:59,552 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-10 06:51:59,552 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:51:59,553 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-10 06:51:59,553 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-01-10 06:51:59,553 INFO L87 Difference]: Start difference. First operand 845 states and 1013 transitions. Second operand has 6 states, 6 states have (on average 16.833333333333332) internal successors, (101), 5 states have internal predecessors, (101), 0 states have call successors, (0), 0 states 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 06:51:59,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:51:59,624 INFO L93 Difference]: Finished difference Result 1797 states and 2241 transitions. [2022-01-10 06:51:59,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-10 06:51:59,625 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 16.833333333333332) internal successors, (101), 5 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 111 [2022-01-10 06:51:59,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:51:59,627 INFO L225 Difference]: With dead ends: 1797 [2022-01-10 06:51:59,627 INFO L226 Difference]: Without dead ends: 1337 [2022-01-10 06:51:59,628 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 106 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 06:51:59,628 INFO L933 BasicCegarLoop]: 79 mSDtfsCounter, 101 mSDsluCounter, 114 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 193 SdHoareTripleChecker+Invalid, 61 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 48 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 06:51:59,628 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [101 Valid, 193 Invalid, 61 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 12 Invalid, 0 Unknown, 48 Unchecked, 0.0s Time] [2022-01-10 06:51:59,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1337 states. [2022-01-10 06:51:59,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1337 to 1323. [2022-01-10 06:51:59,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1323 states, 1322 states have (on average 1.2239031770045385) internal successors, (1618), 1322 states have internal predecessors, (1618), 0 states have call successors, (0), 0 states 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 06:51:59,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1323 states to 1323 states and 1618 transitions. [2022-01-10 06:51:59,675 INFO L78 Accepts]: Start accepts. Automaton has 1323 states and 1618 transitions. Word has length 111 [2022-01-10 06:51:59,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:51:59,675 INFO L470 AbstractCegarLoop]: Abstraction has 1323 states and 1618 transitions. [2022-01-10 06:51:59,675 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.833333333333332) internal successors, (101), 5 states have internal predecessors, (101), 0 states have call successors, (0), 0 states 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 06:51:59,675 INFO L276 IsEmpty]: Start isEmpty. Operand 1323 states and 1618 transitions. [2022-01-10 06:51:59,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2022-01-10 06:51:59,676 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:51:59,676 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] [2022-01-10 06:51:59,683 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 06:51:59,883 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 06:51:59,883 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:51:59,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:51:59,883 INFO L85 PathProgramCache]: Analyzing trace with hash -1865059485, now seen corresponding path program 1 times [2022-01-10 06:51:59,884 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:51:59,884 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1005244878] [2022-01-10 06:51:59,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:51:59,884 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:51:59,884 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:51:59,885 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 06:51:59,886 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 06:51:59,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:51:59,941 INFO L263 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-10 06:51:59,943 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:52:00,704 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 30 proven. 48 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-01-10 06:52:00,704 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 06:52:00,966 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 30 proven. 48 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-01-10 06:52:00,967 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:52:00,967 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1005244878] [2022-01-10 06:52:00,967 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1005244878] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 06:52:00,967 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 06:52:00,967 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2022-01-10 06:52:00,967 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1868936638] [2022-01-10 06:52:00,967 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 06:52:00,967 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-10 06:52:00,967 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:52:00,968 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-10 06:52:00,968 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2022-01-10 06:52:00,968 INFO L87 Difference]: Start difference. First operand 1323 states and 1618 transitions. Second operand has 16 states, 16 states have (on average 11.3125) internal successors, (181), 15 states have internal predecessors, (181), 0 states have call successors, (0), 0 states 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 06:52:01,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:52:01,155 INFO L93 Difference]: Finished difference Result 2566 states and 3203 transitions. [2022-01-10 06:52:01,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-10 06:52:01,155 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 11.3125) internal successors, (181), 15 states have internal predecessors, (181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 111 [2022-01-10 06:52:01,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:52:01,159 INFO L225 Difference]: With dead ends: 2566 [2022-01-10 06:52:01,159 INFO L226 Difference]: Without dead ends: 1764 [2022-01-10 06:52:01,163 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 231 GetRequests, 209 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=116, Invalid=436, Unknown=0, NotChecked=0, Total=552 [2022-01-10 06:52:01,163 INFO L933 BasicCegarLoop]: 91 mSDtfsCounter, 211 mSDsluCounter, 618 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 211 SdHoareTripleChecker+Valid, 709 SdHoareTripleChecker+Invalid, 136 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 93 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 06:52:01,163 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [211 Valid, 709 Invalid, 136 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 40 Invalid, 0 Unknown, 93 Unchecked, 0.0s Time] [2022-01-10 06:52:01,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1764 states. [2022-01-10 06:52:01,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1764 to 1752. [2022-01-10 06:52:01,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1752 states, 1751 states have (on average 1.227869788692176) internal successors, (2150), 1751 states have internal predecessors, (2150), 0 states have call successors, (0), 0 states 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 06:52:01,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1752 states to 1752 states and 2150 transitions. [2022-01-10 06:52:01,226 INFO L78 Accepts]: Start accepts. Automaton has 1752 states and 2150 transitions. Word has length 111 [2022-01-10 06:52:01,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:52:01,227 INFO L470 AbstractCegarLoop]: Abstraction has 1752 states and 2150 transitions. [2022-01-10 06:52:01,227 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 11.3125) internal successors, (181), 15 states have internal predecessors, (181), 0 states have call successors, (0), 0 states 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 06:52:01,227 INFO L276 IsEmpty]: Start isEmpty. Operand 1752 states and 2150 transitions. [2022-01-10 06:52:01,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2022-01-10 06:52:01,228 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:52:01,228 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 06:52:01,237 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (37)] Forceful destruction successful, exit code 0 [2022-01-10 06:52:01,435 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 06:52:01,435 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:52:01,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:52:01,436 INFO L85 PathProgramCache]: Analyzing trace with hash -560418820, now seen corresponding path program 1 times [2022-01-10 06:52:01,436 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:52:01,436 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2054516557] [2022-01-10 06:52:01,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:52:01,436 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:52:01,436 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:52:01,437 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 06:52:01,437 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 06:52:01,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:52:01,492 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-10 06:52:01,494 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:52:02,274 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 16 proven. 51 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-01-10 06:52:02,274 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 06:52:02,563 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 16 proven. 51 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-01-10 06:52:02,564 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:52:02,564 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2054516557] [2022-01-10 06:52:02,564 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2054516557] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 06:52:02,564 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 06:52:02,564 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2022-01-10 06:52:02,564 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1235946055] [2022-01-10 06:52:02,564 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 06:52:02,564 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-10 06:52:02,564 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:52:02,564 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-10 06:52:02,565 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2022-01-10 06:52:02,565 INFO L87 Difference]: Start difference. First operand 1752 states and 2150 transitions. Second operand has 16 states, 16 states have (on average 11.1875) internal successors, (179), 15 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 06:52:02,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:52:02,788 INFO L93 Difference]: Finished difference Result 3908 states and 4882 transitions. [2022-01-10 06:52:02,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-10 06:52:02,789 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 11.1875) internal successors, (179), 15 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 111 [2022-01-10 06:52:02,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:52:02,794 INFO L225 Difference]: With dead ends: 3908 [2022-01-10 06:52:02,795 INFO L226 Difference]: Without dead ends: 2717 [2022-01-10 06:52:02,796 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 230 GetRequests, 208 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 06:52:02,796 INFO L933 BasicCegarLoop]: 84 mSDtfsCounter, 164 mSDsluCounter, 617 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 164 SdHoareTripleChecker+Valid, 701 SdHoareTripleChecker+Invalid, 78 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 51 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 06:52:02,797 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [164 Valid, 701 Invalid, 78 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 24 Invalid, 0 Unknown, 51 Unchecked, 0.0s Time] [2022-01-10 06:52:02,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2717 states. [2022-01-10 06:52:02,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2717 to 2697. [2022-01-10 06:52:02,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2697 states, 2696 states have (on average 1.2336795252225519) internal successors, (3326), 2696 states have internal predecessors, (3326), 0 states have call successors, (0), 0 states 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 06:52:02,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2697 states to 2697 states and 3326 transitions. [2022-01-10 06:52:02,892 INFO L78 Accepts]: Start accepts. Automaton has 2697 states and 3326 transitions. Word has length 111 [2022-01-10 06:52:02,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:52:02,892 INFO L470 AbstractCegarLoop]: Abstraction has 2697 states and 3326 transitions. [2022-01-10 06:52:02,892 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 11.1875) internal successors, (179), 15 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 06:52:02,892 INFO L276 IsEmpty]: Start isEmpty. Operand 2697 states and 3326 transitions. [2022-01-10 06:52:02,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2022-01-10 06:52:02,893 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:52:02,893 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 06:52:02,900 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (38)] Ended with exit code 0 [2022-01-10 06:52:03,094 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 06:52:03,094 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:52:03,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:52:03,094 INFO L85 PathProgramCache]: Analyzing trace with hash 235162380, now seen corresponding path program 1 times [2022-01-10 06:52:03,094 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:52:03,095 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1426104441] [2022-01-10 06:52:03,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:52:03,095 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:52:03,095 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:52:03,096 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 06:52:03,096 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 06:52:03,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:52:03,149 INFO L263 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 5 conjunts are in the unsatisfiable core [2022-01-10 06:52:03,150 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:52:03,591 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 81 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-01-10 06:52:03,591 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:52:03,591 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:52:03,591 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1426104441] [2022-01-10 06:52:03,591 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1426104441] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:52:03,591 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:52:03,591 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-10 06:52:03,591 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1645376743] [2022-01-10 06:52:03,591 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:52:03,592 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-10 06:52:03,592 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:52:03,592 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-10 06:52:03,592 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-01-10 06:52:03,592 INFO L87 Difference]: Start difference. First operand 2697 states and 3326 transitions. Second operand has 6 states, 6 states have (on average 17.0) internal successors, (102), 5 states have internal predecessors, (102), 0 states have call successors, (0), 0 states 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 06:52:03,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:52:03,725 INFO L93 Difference]: Finished difference Result 5423 states and 6782 transitions. [2022-01-10 06:52:03,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-10 06:52:03,725 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 17.0) internal successors, (102), 5 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 111 [2022-01-10 06:52:03,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:52:03,734 INFO L225 Difference]: With dead ends: 5423 [2022-01-10 06:52:03,734 INFO L226 Difference]: Without dead ends: 4076 [2022-01-10 06:52:03,736 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 106 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 06:52:03,736 INFO L933 BasicCegarLoop]: 83 mSDtfsCounter, 92 mSDsluCounter, 120 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 203 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 43 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 06:52:03,736 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [92 Valid, 203 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 10 Invalid, 0 Unknown, 43 Unchecked, 0.0s Time] [2022-01-10 06:52:03,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4076 states. [2022-01-10 06:52:03,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4076 to 4026. [2022-01-10 06:52:03,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4026 states, 4025 states have (on average 1.2335403726708074) internal successors, (4965), 4025 states have internal predecessors, (4965), 0 states have call successors, (0), 0 states 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 06:52:03,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4026 states to 4026 states and 4965 transitions. [2022-01-10 06:52:03,886 INFO L78 Accepts]: Start accepts. Automaton has 4026 states and 4965 transitions. Word has length 111 [2022-01-10 06:52:03,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:52:03,886 INFO L470 AbstractCegarLoop]: Abstraction has 4026 states and 4965 transitions. [2022-01-10 06:52:03,886 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.0) internal successors, (102), 5 states have internal predecessors, (102), 0 states have call successors, (0), 0 states 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 06:52:03,886 INFO L276 IsEmpty]: Start isEmpty. Operand 4026 states and 4965 transitions. [2022-01-10 06:52:03,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2022-01-10 06:52:03,888 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:52:03,888 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] [2022-01-10 06:52:03,929 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 06:52:04,093 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 06:52:04,094 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:52:04,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:52:04,094 INFO L85 PathProgramCache]: Analyzing trace with hash 79960425, now seen corresponding path program 1 times [2022-01-10 06:52:04,094 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:52:04,094 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [497431943] [2022-01-10 06:52:04,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:52:04,094 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:52:04,094 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:52:04,095 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 06:52:04,096 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 06:52:04,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:52:04,151 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 33 conjunts are in the unsatisfiable core [2022-01-10 06:52:04,152 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:52:07,290 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 34 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 06:52:07,290 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 06:52:08,979 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 25 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 06:52:08,979 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:52:08,979 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [497431943] [2022-01-10 06:52:08,979 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [497431943] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 06:52:08,979 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 06:52:08,980 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 27] total 53 [2022-01-10 06:52:08,980 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2065621002] [2022-01-10 06:52:08,980 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 06:52:08,980 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2022-01-10 06:52:08,980 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:52:08,980 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2022-01-10 06:52:08,981 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=304, Invalid=2452, Unknown=0, NotChecked=0, Total=2756 [2022-01-10 06:52:08,981 INFO L87 Difference]: Start difference. First operand 4026 states and 4965 transitions. Second operand has 53 states, 53 states have (on average 3.9056603773584904) internal successors, (207), 53 states have internal predecessors, (207), 0 states have call successors, (0), 0 states 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 06:52:10,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:52:10,117 INFO L93 Difference]: Finished difference Result 4997 states and 6105 transitions. [2022-01-10 06:52:10,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-01-10 06:52:10,118 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 3.9056603773584904) internal successors, (207), 53 states have internal predecessors, (207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 111 [2022-01-10 06:52:10,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:52:10,124 INFO L225 Difference]: With dead ends: 4997 [2022-01-10 06:52:10,124 INFO L226 Difference]: Without dead ends: 4810 [2022-01-10 06:52:10,126 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 225 GetRequests, 169 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1016 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=424, Invalid=2882, Unknown=0, NotChecked=0, Total=3306 [2022-01-10 06:52:10,126 INFO L933 BasicCegarLoop]: 87 mSDtfsCounter, 405 mSDsluCounter, 2288 mSDsCounter, 0 mSdLazyCounter, 603 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 405 SdHoareTripleChecker+Valid, 2375 SdHoareTripleChecker+Invalid, 830 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 603 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 198 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-10 06:52:10,126 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [405 Valid, 2375 Invalid, 830 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 603 Invalid, 0 Unknown, 198 Unchecked, 0.4s Time] [2022-01-10 06:52:10,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4810 states. [2022-01-10 06:52:10,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4810 to 4080. [2022-01-10 06:52:10,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4080 states, 4079 states have (on average 1.233390536896298) internal successors, (5031), 4079 states have internal predecessors, (5031), 0 states have call successors, (0), 0 states 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 06:52:10,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4080 states to 4080 states and 5031 transitions. [2022-01-10 06:52:10,281 INFO L78 Accepts]: Start accepts. Automaton has 4080 states and 5031 transitions. Word has length 111 [2022-01-10 06:52:10,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:52:10,281 INFO L470 AbstractCegarLoop]: Abstraction has 4080 states and 5031 transitions. [2022-01-10 06:52:10,281 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 3.9056603773584904) internal successors, (207), 53 states have internal predecessors, (207), 0 states have call successors, (0), 0 states 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 06:52:10,281 INFO L276 IsEmpty]: Start isEmpty. Operand 4080 states and 5031 transitions. [2022-01-10 06:52:10,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2022-01-10 06:52:10,283 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:52:10,319 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] [2022-01-10 06:52:10,328 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 06:52:10,519 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 06:52:10,520 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:52:10,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:52:10,520 INFO L85 PathProgramCache]: Analyzing trace with hash 1942272803, now seen corresponding path program 1 times [2022-01-10 06:52:10,520 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:52:10,520 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1446807286] [2022-01-10 06:52:10,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:52:10,521 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:52:10,521 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:52:10,521 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 06:52:10,522 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 06:52:10,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:52:10,578 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 30 conjunts are in the unsatisfiable core [2022-01-10 06:52:10,580 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:52:13,798 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 25 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 06:52:13,798 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 06:52:15,053 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 16 proven. 77 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 06:52:15,053 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:52:15,053 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1446807286] [2022-01-10 06:52:15,053 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1446807286] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 06:52:15,053 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 06:52:15,053 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 20] total 43 [2022-01-10 06:52:15,054 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [484271986] [2022-01-10 06:52:15,054 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 06:52:15,054 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-01-10 06:52:15,054 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:52:15,054 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-01-10 06:52:15,055 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=1596, Unknown=0, NotChecked=0, Total=1806 [2022-01-10 06:52:15,055 INFO L87 Difference]: Start difference. First operand 4080 states and 5031 transitions. Second operand has 43 states, 43 states have (on average 4.930232558139535) internal successors, (212), 43 states have internal predecessors, (212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 06:52:16,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:52:16,053 INFO L93 Difference]: Finished difference Result 6190 states and 7503 transitions. [2022-01-10 06:52:16,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-01-10 06:52:16,054 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 4.930232558139535) internal successors, (212), 43 states have internal predecessors, (212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 111 [2022-01-10 06:52:16,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:52:16,063 INFO L225 Difference]: With dead ends: 6190 [2022-01-10 06:52:16,063 INFO L226 Difference]: Without dead ends: 5940 [2022-01-10 06:52:16,065 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 227 GetRequests, 180 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 586 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=282, Invalid=2070, Unknown=0, NotChecked=0, Total=2352 [2022-01-10 06:52:16,065 INFO L933 BasicCegarLoop]: 138 mSDtfsCounter, 340 mSDsluCounter, 2633 mSDsCounter, 0 mSdLazyCounter, 367 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 340 SdHoareTripleChecker+Valid, 2771 SdHoareTripleChecker+Invalid, 625 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 367 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 240 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-10 06:52:16,065 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [340 Valid, 2771 Invalid, 625 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 367 Invalid, 0 Unknown, 240 Unchecked, 0.3s Time] [2022-01-10 06:52:16,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5940 states. [2022-01-10 06:52:16,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5940 to 4087. [2022-01-10 06:52:16,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4087 states, 4086 states have (on average 1.2332354380812531) internal successors, (5039), 4086 states have internal predecessors, (5039), 0 states have call successors, (0), 0 states 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 06:52:16,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4087 states to 4087 states and 5039 transitions. [2022-01-10 06:52:16,254 INFO L78 Accepts]: Start accepts. Automaton has 4087 states and 5039 transitions. Word has length 111 [2022-01-10 06:52:16,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:52:16,255 INFO L470 AbstractCegarLoop]: Abstraction has 4087 states and 5039 transitions. [2022-01-10 06:52:16,255 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 4.930232558139535) internal successors, (212), 43 states have internal predecessors, (212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 06:52:16,255 INFO L276 IsEmpty]: Start isEmpty. Operand 4087 states and 5039 transitions. [2022-01-10 06:52:16,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2022-01-10 06:52:16,256 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:52:16,257 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] [2022-01-10 06:52:16,263 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 06:52:16,463 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 06:52:16,463 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:52:16,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:52:16,463 INFO L85 PathProgramCache]: Analyzing trace with hash -1021552957, now seen corresponding path program 1 times [2022-01-10 06:52:16,464 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:52:16,464 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [568393716] [2022-01-10 06:52:16,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:52:16,464 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:52:16,464 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:52:16,465 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 06:52:16,465 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 06:52:16,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:52:16,519 INFO L263 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-10 06:52:16,520 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:52:17,150 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 40 proven. 26 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-01-10 06:52:17,150 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 06:52:17,481 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 40 proven. 26 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-01-10 06:52:17,482 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:52:17,482 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [568393716] [2022-01-10 06:52:17,482 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [568393716] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 06:52:17,482 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 06:52:17,482 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2022-01-10 06:52:17,482 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [568777415] [2022-01-10 06:52:17,482 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 06:52:17,482 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-10 06:52:17,482 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:52:17,483 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-10 06:52:17,483 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2022-01-10 06:52:17,483 INFO L87 Difference]: Start difference. First operand 4087 states and 5039 transitions. Second operand has 16 states, 16 states have (on average 9.9375) internal successors, (159), 15 states have internal predecessors, (159), 0 states have call successors, (0), 0 states 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 06:52:17,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:52:17,807 INFO L93 Difference]: Finished difference Result 7649 states and 9502 transitions. [2022-01-10 06:52:17,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-10 06:52:17,814 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 9.9375) internal successors, (159), 15 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 111 [2022-01-10 06:52:17,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:52:17,822 INFO L225 Difference]: With dead ends: 7649 [2022-01-10 06:52:17,822 INFO L226 Difference]: Without dead ends: 5995 [2022-01-10 06:52:17,824 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 228 GetRequests, 208 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=99, Invalid=363, Unknown=0, NotChecked=0, Total=462 [2022-01-10 06:52:17,825 INFO L933 BasicCegarLoop]: 80 mSDtfsCounter, 97 mSDsluCounter, 620 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 700 SdHoareTripleChecker+Invalid, 87 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 64 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 06:52:17,825 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [97 Valid, 700 Invalid, 87 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 22 Invalid, 0 Unknown, 64 Unchecked, 0.0s Time] [2022-01-10 06:52:17,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5995 states. [2022-01-10 06:52:18,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5995 to 5919. [2022-01-10 06:52:18,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5919 states, 5918 states have (on average 1.2333558634673876) internal successors, (7299), 5918 states have internal predecessors, (7299), 0 states have call successors, (0), 0 states 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 06:52:18,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5919 states to 5919 states and 7299 transitions. [2022-01-10 06:52:18,115 INFO L78 Accepts]: Start accepts. Automaton has 5919 states and 7299 transitions. Word has length 111 [2022-01-10 06:52:18,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:52:18,115 INFO L470 AbstractCegarLoop]: Abstraction has 5919 states and 7299 transitions. [2022-01-10 06:52:18,115 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 9.9375) internal successors, (159), 15 states have internal predecessors, (159), 0 states have call successors, (0), 0 states 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 06:52:18,115 INFO L276 IsEmpty]: Start isEmpty. Operand 5919 states and 7299 transitions. [2022-01-10 06:52:18,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2022-01-10 06:52:18,117 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:52:18,117 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 06:52:18,124 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (42)] Ended with exit code 0 [2022-01-10 06:52:18,323 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 06:52:18,324 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:52:18,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:52:18,324 INFO L85 PathProgramCache]: Analyzing trace with hash -1093939515, now seen corresponding path program 1 times [2022-01-10 06:52:18,324 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:52:18,324 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [977039732] [2022-01-10 06:52:18,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:52:18,325 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:52:18,325 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:52:18,325 INFO L229 MonitoredProcess]: Starting monitored process 43 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:52:18,326 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (43)] Waiting until timeout for monitored process [2022-01-10 06:52:18,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:52:18,393 INFO L263 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 5 conjunts are in the unsatisfiable core [2022-01-10 06:52:18,394 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:52:18,825 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 84 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-01-10 06:52:18,825 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:52:18,825 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:52:18,825 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [977039732] [2022-01-10 06:52:18,825 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [977039732] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:52:18,825 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:52:18,825 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-10 06:52:18,825 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1521547493] [2022-01-10 06:52:18,825 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:52:18,826 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-10 06:52:18,826 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:52:18,826 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-10 06:52:18,826 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-01-10 06:52:18,826 INFO L87 Difference]: Start difference. First operand 5919 states and 7299 transitions. Second operand has 6 states, 6 states have (on average 17.166666666666668) internal successors, (103), 5 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 06:52:19,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:52:19,128 INFO L93 Difference]: Finished difference Result 9947 states and 12359 transitions. [2022-01-10 06:52:19,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-10 06:52:19,129 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 17.166666666666668) internal successors, (103), 5 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 111 [2022-01-10 06:52:19,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:52:19,138 INFO L225 Difference]: With dead ends: 9947 [2022-01-10 06:52:19,138 INFO L226 Difference]: Without dead ends: 7271 [2022-01-10 06:52:19,141 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 106 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 06:52:19,142 INFO L933 BasicCegarLoop]: 79 mSDtfsCounter, 61 mSDsluCounter, 166 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 245 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 49 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 06:52:19,142 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [61 Valid, 245 Invalid, 68 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 18 Invalid, 0 Unknown, 49 Unchecked, 0.0s Time] [2022-01-10 06:52:19,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7271 states. [2022-01-10 06:52:19,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7271 to 7177. [2022-01-10 06:52:19,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7177 states, 7176 states have (on average 1.2270066889632107) internal successors, (8805), 7176 states have internal predecessors, (8805), 0 states have call successors, (0), 0 states 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 06:52:19,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7177 states to 7177 states and 8805 transitions. [2022-01-10 06:52:19,506 INFO L78 Accepts]: Start accepts. Automaton has 7177 states and 8805 transitions. Word has length 111 [2022-01-10 06:52:19,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:52:19,506 INFO L470 AbstractCegarLoop]: Abstraction has 7177 states and 8805 transitions. [2022-01-10 06:52:19,506 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.166666666666668) internal successors, (103), 5 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 06:52:19,506 INFO L276 IsEmpty]: Start isEmpty. Operand 7177 states and 8805 transitions. [2022-01-10 06:52:19,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2022-01-10 06:52:19,508 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:52:19,508 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] [2022-01-10 06:52:19,517 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (43)] Forceful destruction successful, exit code 0 [2022-01-10 06:52:19,714 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 06:52:19,714 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:52:19,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:52:19,715 INFO L85 PathProgramCache]: Analyzing trace with hash -519376042, now seen corresponding path program 1 times [2022-01-10 06:52:19,715 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:52:19,715 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1336239617] [2022-01-10 06:52:19,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:52:19,715 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:52:19,715 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:52:19,716 INFO L229 MonitoredProcess]: Starting monitored process 44 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:52:19,717 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (44)] Waiting until timeout for monitored process [2022-01-10 06:52:19,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:52:19,776 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 13 conjunts are in the unsatisfiable core [2022-01-10 06:52:19,777 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:52:20,485 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 30 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 06:52:20,485 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 06:52:20,836 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 45 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 06:52:20,837 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:52:20,837 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1336239617] [2022-01-10 06:52:20,837 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1336239617] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 06:52:20,837 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 06:52:20,837 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 23 [2022-01-10 06:52:20,837 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1039334402] [2022-01-10 06:52:20,837 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 06:52:20,837 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-10 06:52:20,837 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:52:20,838 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-10 06:52:20,838 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=435, Unknown=0, NotChecked=0, Total=506 [2022-01-10 06:52:20,838 INFO L87 Difference]: Start difference. First operand 7177 states and 8805 transitions. Second operand has 23 states, 23 states have (on average 9.08695652173913) internal successors, (209), 23 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 06:52:22,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:52:22,170 INFO L93 Difference]: Finished difference Result 16640 states and 20694 transitions. [2022-01-10 06:52:22,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-01-10 06:52:22,171 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 9.08695652173913) internal successors, (209), 23 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 112 [2022-01-10 06:52:22,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:52:22,184 INFO L225 Difference]: With dead ends: 16640 [2022-01-10 06:52:22,185 INFO L226 Difference]: Without dead ends: 12062 [2022-01-10 06:52:22,189 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 264 GetRequests, 212 SyntacticMatches, 5 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 556 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=389, Invalid=1963, Unknown=0, NotChecked=0, Total=2352 [2022-01-10 06:52:22,189 INFO L933 BasicCegarLoop]: 149 mSDtfsCounter, 736 mSDsluCounter, 2611 mSDsCounter, 0 mSdLazyCounter, 231 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 736 SdHoareTripleChecker+Valid, 2760 SdHoareTripleChecker+Invalid, 705 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 231 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 463 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 06:52:22,190 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [736 Valid, 2760 Invalid, 705 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 231 Invalid, 0 Unknown, 463 Unchecked, 0.1s Time] [2022-01-10 06:52:22,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12062 states. [2022-01-10 06:52:22,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12062 to 8788. [2022-01-10 06:52:22,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8788 states, 8787 states have (on average 1.2305678843746444) internal successors, (10813), 8787 states have internal predecessors, (10813), 0 states have call successors, (0), 0 states 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 06:52:22,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8788 states to 8788 states and 10813 transitions. [2022-01-10 06:52:22,667 INFO L78 Accepts]: Start accepts. Automaton has 8788 states and 10813 transitions. Word has length 112 [2022-01-10 06:52:22,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:52:22,668 INFO L470 AbstractCegarLoop]: Abstraction has 8788 states and 10813 transitions. [2022-01-10 06:52:22,668 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 9.08695652173913) internal successors, (209), 23 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 06:52:22,668 INFO L276 IsEmpty]: Start isEmpty. Operand 8788 states and 10813 transitions. [2022-01-10 06:52:22,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2022-01-10 06:52:22,669 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:52:22,669 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] [2022-01-10 06:52:22,676 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (44)] Ended with exit code 0 [2022-01-10 06:52:22,870 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 06:52:22,870 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:52:22,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:52:22,870 INFO L85 PathProgramCache]: Analyzing trace with hash -1768544895, now seen corresponding path program 1 times [2022-01-10 06:52:22,871 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:52:22,871 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1738021157] [2022-01-10 06:52:22,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:52:22,871 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:52:22,871 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:52:22,872 INFO L229 MonitoredProcess]: Starting monitored process 45 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:52:22,872 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (45)] Waiting until timeout for monitored process [2022-01-10 06:52:22,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:52:22,927 INFO L263 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 13 conjunts are in the unsatisfiable core [2022-01-10 06:52:22,928 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:52:24,202 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 22 proven. 77 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 06:52:24,203 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 06:52:24,538 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 22 proven. 77 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 06:52:24,538 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:52:24,538 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1738021157] [2022-01-10 06:52:24,538 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1738021157] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 06:52:24,538 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 06:52:24,538 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 25 [2022-01-10 06:52:24,538 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [831131681] [2022-01-10 06:52:24,538 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 06:52:24,538 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-10 06:52:24,539 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:52:24,539 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-10 06:52:24,539 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=567, Unknown=0, NotChecked=0, Total=650 [2022-01-10 06:52:24,539 INFO L87 Difference]: Start difference. First operand 8788 states and 10813 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 06:52:25,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:52:25,049 INFO L93 Difference]: Finished difference Result 12112 states and 14992 transitions. [2022-01-10 06:52:25,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-01-10 06:52:25,050 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 112 [2022-01-10 06:52:25,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:52:25,060 INFO L225 Difference]: With dead ends: 12112 [2022-01-10 06:52:25,060 INFO L226 Difference]: Without dead ends: 8784 [2022-01-10 06:52:25,064 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 226 GetRequests, 198 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 201 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=127, Invalid=743, Unknown=0, NotChecked=0, Total=870 [2022-01-10 06:52:25,064 INFO L933 BasicCegarLoop]: 89 mSDtfsCounter, 158 mSDsluCounter, 1133 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 158 SdHoareTripleChecker+Valid, 1222 SdHoareTripleChecker+Invalid, 204 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 78 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 121 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 06:52:25,064 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [158 Valid, 1222 Invalid, 204 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 78 Invalid, 0 Unknown, 121 Unchecked, 0.0s Time] [2022-01-10 06:52:25,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8784 states. [2022-01-10 06:52:25,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8784 to 8732. [2022-01-10 06:52:25,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8732 states, 8731 states have (on average 1.2309013858664528) internal successors, (10747), 8731 states have internal predecessors, (10747), 0 states have call successors, (0), 0 states 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 06:52:25,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8732 states to 8732 states and 10747 transitions. [2022-01-10 06:52:25,475 INFO L78 Accepts]: Start accepts. Automaton has 8732 states and 10747 transitions. Word has length 112 [2022-01-10 06:52:25,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:52:25,476 INFO L470 AbstractCegarLoop]: Abstraction has 8732 states and 10747 transitions. [2022-01-10 06:52:25,476 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 06:52:25,476 INFO L276 IsEmpty]: Start isEmpty. Operand 8732 states and 10747 transitions. [2022-01-10 06:52:25,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2022-01-10 06:52:25,492 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:52:25,493 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] [2022-01-10 06:52:25,499 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (45)] Ended with exit code 0 [2022-01-10 06:52:25,693 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 06:52:25,693 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:52:25,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:52:25,694 INFO L85 PathProgramCache]: Analyzing trace with hash -2021735149, now seen corresponding path program 1 times [2022-01-10 06:52:25,694 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:52:25,694 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1334210448] [2022-01-10 06:52:25,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:52:25,694 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:52:25,694 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:52:25,695 INFO L229 MonitoredProcess]: Starting monitored process 46 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:52:25,697 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (46)] Waiting until timeout for monitored process [2022-01-10 06:52:25,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:52:25,764 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 28 conjunts are in the unsatisfiable core [2022-01-10 06:52:25,766 INFO L286 TraceCheckSpWp]: Computing forward predicates...