/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/automizer/BvToInt/svcomp-Reach-64bit-Automizer_Bitvector.epf -i ../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr-var-start-time.4.1.ufo.BOUNDED-8.pals.c.v+cfa-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-a10ec3b [2022-01-10 07:07:56,323 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-10 07:07:56,325 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-10 07:07:56,372 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-01-10 07:07:56,372 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-01-10 07:07:56,374 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-01-10 07:07:56,377 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-01-10 07:07:56,378 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-01-10 07:07:56,380 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-01-10 07:07:56,383 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-01-10 07:07:56,383 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-01-10 07:07:56,384 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-01-10 07:07:56,385 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-01-10 07:07:56,386 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-01-10 07:07:56,387 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-01-10 07:07:56,389 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-01-10 07:07:56,390 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-01-10 07:07:56,390 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-01-10 07:07:56,392 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-01-10 07:07:56,396 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-01-10 07:07:56,397 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-01-10 07:07:56,398 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-01-10 07:07:56,399 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-01-10 07:07:56,400 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-01-10 07:07:56,412 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-01-10 07:07:56,416 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-10 07:07:56,417 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-10 07:07:56,417 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-10 07:07:56,418 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/BvToInt/svcomp-Reach-64bit-Automizer_Bitvector.epf [2022-01-10 07:07:56,441 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-10 07:07:56,441 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-10 07:07:56,442 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-01-10 07:07:56,442 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-01-10 07:07:56,442 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-01-10 07:07:56,442 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-01-10 07:07:56,443 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-01-10 07:07:56,443 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-01-10 07:07:56,443 INFO L138 SettingsManager]: * Use SBE=true [2022-01-10 07:07:56,443 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-10 07:07:56,444 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-10 07:07:56,444 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-10 07:07:56,444 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-10 07:07:56,444 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-10 07:07:56,444 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-10 07:07:56,444 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-01-10 07:07:56,444 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-01-10 07:07:56,444 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-01-10 07:07:56,444 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-10 07:07:56,444 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-10 07:07:56,444 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-10 07:07:56,445 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-10 07:07:56,445 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-10 07:07:56,445 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-10 07:07:56,445 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-10 07:07:56,445 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-01-10 07:07:56,445 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-01-10 07:07:56,445 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2022-01-10 07:07:56,445 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-01-10 07:07:56,445 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-01-10 07:07:56,445 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-01-10 07:07:56,445 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-01-10 07:07:56,446 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-01-10 07:07:56,446 INFO L138 SettingsManager]: * Logic for external solver=AUFBV WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-10 07:07:56,622 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-10 07:07:56,641 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-10 07:07:56,643 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-10 07:07:56,644 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-10 07:07:56,645 INFO L275 PluginConnector]: CDTParser initialized [2022-01-10 07:07:56,646 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr-var-start-time.4.1.ufo.BOUNDED-8.pals.c.v+cfa-reducer.c [2022-01-10 07:07:56,700 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1390db95e/cb1ad8a2d44349c18bf9e484b36b28b8/FLAG8deb440ea [2022-01-10 07:07:57,028 INFO L306 CDTParser]: Found 1 translation units. [2022-01-10 07:07:57,029 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr-var-start-time.4.1.ufo.BOUNDED-8.pals.c.v+cfa-reducer.c [2022-01-10 07:07:57,036 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1390db95e/cb1ad8a2d44349c18bf9e484b36b28b8/FLAG8deb440ea [2022-01-10 07:07:57,438 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1390db95e/cb1ad8a2d44349c18bf9e484b36b28b8 [2022-01-10 07:07:57,440 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-10 07:07:57,441 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-01-10 07:07:57,442 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-10 07:07:57,442 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-10 07:07:57,445 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-10 07:07:57,446 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 07:07:57" (1/1) ... [2022-01-10 07:07:57,446 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4aa1170c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 07:07:57, skipping insertion in model container [2022-01-10 07:07:57,447 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 07:07:57" (1/1) ... [2022-01-10 07:07:57,463 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-10 07:07:57,490 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-10 07:07:57,648 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr-var-start-time.4.1.ufo.BOUNDED-8.pals.c.v+cfa-reducer.c[5339,5352] [2022-01-10 07:07:57,682 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-10 07:07:57,696 INFO L203 MainTranslator]: Completed pre-run [2022-01-10 07:07:57,722 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr-var-start-time.4.1.ufo.BOUNDED-8.pals.c.v+cfa-reducer.c[5339,5352] [2022-01-10 07:07:57,734 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-10 07:07:57,745 INFO L208 MainTranslator]: Completed translation [2022-01-10 07:07:57,746 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 07:07:57 WrapperNode [2022-01-10 07:07:57,746 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-10 07:07:57,747 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-01-10 07:07:57,747 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-01-10 07:07:57,747 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-01-10 07:07:57,768 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 07:07:57" (1/1) ... [2022-01-10 07:07:57,786 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 07:07:57" (1/1) ... [2022-01-10 07:07:57,805 INFO L137 Inliner]: procedures = 23, calls = 7, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 414 [2022-01-10 07:07:57,806 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-01-10 07:07:57,806 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-10 07:07:57,806 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-10 07:07:57,807 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-10 07:07:57,812 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 07:07:57" (1/1) ... [2022-01-10 07:07:57,812 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 07:07:57" (1/1) ... [2022-01-10 07:07:57,815 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 07:07:57" (1/1) ... [2022-01-10 07:07:57,815 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 07:07:57" (1/1) ... [2022-01-10 07:07:57,820 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 07:07:57" (1/1) ... [2022-01-10 07:07:57,829 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 07:07:57" (1/1) ... [2022-01-10 07:07:57,831 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 07:07:57" (1/1) ... [2022-01-10 07:07:57,833 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-10 07:07:57,834 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-10 07:07:57,834 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-10 07:07:57,834 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-10 07:07:57,838 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 07:07:57" (1/1) ... [2022-01-10 07:07:57,843 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-10 07:07:57,858 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 07:07:57,867 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-01-10 07:07:57,869 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-01-10 07:07:57,893 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-10 07:07:57,893 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-01-10 07:07:57,893 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-10 07:07:57,893 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-10 07:07:57,987 INFO L234 CfgBuilder]: Building ICFG [2022-01-10 07:07:57,988 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-10 07:07:58,300 INFO L275 CfgBuilder]: Performing block encoding [2022-01-10 07:07:58,308 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-10 07:07:58,308 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2022-01-10 07:07:58,311 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 07:07:58 BoogieIcfgContainer [2022-01-10 07:07:58,311 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-10 07:07:58,312 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-10 07:07:58,312 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-10 07:07:58,314 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-10 07:07:58,314 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 10.01 07:07:57" (1/3) ... [2022-01-10 07:07:58,315 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@78b8b9bd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 07:07:58, skipping insertion in model container [2022-01-10 07:07:58,315 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 07:07:57" (2/3) ... [2022-01-10 07:07:58,316 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@78b8b9bd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 07:07:58, skipping insertion in model container [2022-01-10 07:07:58,316 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 07:07:58" (3/3) ... [2022-01-10 07:07:58,317 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr-var-start-time.4.1.ufo.BOUNDED-8.pals.c.v+cfa-reducer.c [2022-01-10 07:07:58,320 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-01-10 07:07:58,320 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-10 07:07:58,353 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-10 07:07:58,357 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2022-01-10 07:07:58,357 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-01-10 07:07:58,367 INFO L276 IsEmpty]: Start isEmpty. Operand has 110 states, 108 states have (on average 1.6944444444444444) internal successors, (183), 109 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 07:07:58,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-01-10 07:07:58,372 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 07:07:58,373 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 07:07:58,373 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 07:07:58,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 07:07:58,386 INFO L85 PathProgramCache]: Analyzing trace with hash 1289871298, now seen corresponding path program 1 times [2022-01-10 07:07:58,395 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 07:07:58,395 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1994654236] [2022-01-10 07:07:58,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 07:07:58,396 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 07:07:58,396 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 07:07:58,398 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 07:07:58,398 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2022-01-10 07:07:58,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 07:07:58,535 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-10 07:07:58,540 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 07:07:58,711 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 07:07:58,711 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 07:07:58,711 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 07:07:58,712 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1994654236] [2022-01-10 07:07:58,712 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1994654236] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 07:07:58,712 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 07:07:58,712 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 07:07:58,713 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [641363980] [2022-01-10 07:07:58,714 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 07:07:58,717 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 07:07:58,718 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 07:07:58,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 07:07:58,742 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 07:07:58,744 INFO L87 Difference]: Start difference. First operand has 110 states, 108 states have (on average 1.6944444444444444) internal successors, (183), 109 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) Second operand has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:07:58,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 07:07:58,814 INFO L93 Difference]: Finished difference Result 260 states and 419 transitions. [2022-01-10 07:07:58,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 07:07:58,818 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 0 states have call successors, (0), 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 48 [2022-01-10 07:07:58,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 07:07:58,828 INFO L225 Difference]: With dead ends: 260 [2022-01-10 07:07:58,828 INFO L226 Difference]: Without dead ends: 171 [2022-01-10 07:07:58,831 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 07:07:58,833 INFO L933 BasicCegarLoop]: 281 mSDtfsCounter, 137 mSDsluCounter, 120 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 137 SdHoareTripleChecker+Valid, 401 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 07:07:58,834 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [137 Valid, 401 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 07:07:58,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2022-01-10 07:07:58,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 169. [2022-01-10 07:07:58,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169 states, 168 states have (on average 1.505952380952381) internal successors, (253), 168 states have internal predecessors, (253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:07:58,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 253 transitions. [2022-01-10 07:07:58,880 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 253 transitions. Word has length 48 [2022-01-10 07:07:58,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 07:07:58,880 INFO L470 AbstractCegarLoop]: Abstraction has 169 states and 253 transitions. [2022-01-10 07:07:58,880 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:07:58,880 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 253 transitions. [2022-01-10 07:07:58,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-01-10 07:07:58,882 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 07:07:58,883 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 07:07:58,892 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2022-01-10 07:07:59,090 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 07:07:59,090 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 07:07:59,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 07:07:59,091 INFO L85 PathProgramCache]: Analyzing trace with hash -1971653998, now seen corresponding path program 1 times [2022-01-10 07:07:59,091 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 07:07:59,091 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [59252319] [2022-01-10 07:07:59,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 07:07:59,092 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 07:07:59,092 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 07:07:59,093 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 07:07:59,094 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2022-01-10 07:07:59,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 07:07:59,186 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-10 07:07:59,190 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 07:07:59,269 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 07:07:59,270 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 07:07:59,270 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 07:07:59,271 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [59252319] [2022-01-10 07:07:59,271 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [59252319] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 07:07:59,271 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 07:07:59,271 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 07:07:59,272 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1055287966] [2022-01-10 07:07:59,274 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 07:07:59,275 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 07:07:59,276 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 07:07:59,277 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 07:07:59,277 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 07:07:59,277 INFO L87 Difference]: Start difference. First operand 169 states and 253 transitions. Second operand has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:07:59,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 07:07:59,312 INFO L93 Difference]: Finished difference Result 421 states and 653 transitions. [2022-01-10 07:07:59,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 07:07:59,312 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 0 states have call successors, (0), 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 49 [2022-01-10 07:07:59,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 07:07:59,322 INFO L225 Difference]: With dead ends: 421 [2022-01-10 07:07:59,323 INFO L226 Difference]: Without dead ends: 279 [2022-01-10 07:07:59,324 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 07:07:59,326 INFO L933 BasicCegarLoop]: 232 mSDtfsCounter, 110 mSDsluCounter, 116 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 348 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 07:07:59,326 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [110 Valid, 348 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 07:07:59,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 279 states. [2022-01-10 07:07:59,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 279 to 277. [2022-01-10 07:07:59,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 277 states, 276 states have (on average 1.536231884057971) internal successors, (424), 276 states have internal predecessors, (424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:07:59,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 277 states to 277 states and 424 transitions. [2022-01-10 07:07:59,349 INFO L78 Accepts]: Start accepts. Automaton has 277 states and 424 transitions. Word has length 49 [2022-01-10 07:07:59,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 07:07:59,349 INFO L470 AbstractCegarLoop]: Abstraction has 277 states and 424 transitions. [2022-01-10 07:07:59,350 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:07:59,350 INFO L276 IsEmpty]: Start isEmpty. Operand 277 states and 424 transitions. [2022-01-10 07:07:59,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-01-10 07:07:59,350 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 07:07:59,351 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 07:07:59,362 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Ended with exit code 0 [2022-01-10 07:07:59,551 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 07:07:59,551 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 07:07:59,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 07:07:59,552 INFO L85 PathProgramCache]: Analyzing trace with hash 663495285, now seen corresponding path program 1 times [2022-01-10 07:07:59,552 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 07:07:59,552 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [527317118] [2022-01-10 07:07:59,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 07:07:59,553 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 07:07:59,553 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 07:07:59,555 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 07:07:59,556 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2022-01-10 07:07:59,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 07:07:59,626 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-10 07:07:59,629 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 07:07:59,701 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 07:07:59,701 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 07:07:59,701 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 07:07:59,701 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [527317118] [2022-01-10 07:07:59,701 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [527317118] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 07:07:59,703 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 07:07:59,703 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 07:07:59,703 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1882468685] [2022-01-10 07:07:59,703 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 07:07:59,705 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 07:07:59,705 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 07:07:59,706 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 07:07:59,706 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 07:07:59,706 INFO L87 Difference]: Start difference. First operand 277 states and 424 transitions. Second operand has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 3 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:07:59,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 07:07:59,730 INFO L93 Difference]: Finished difference Result 713 states and 1114 transitions. [2022-01-10 07:07:59,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 07:07:59,731 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 3 states have internal predecessors, (50), 0 states have call successors, (0), 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 50 [2022-01-10 07:07:59,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 07:07:59,734 INFO L225 Difference]: With dead ends: 713 [2022-01-10 07:07:59,734 INFO L226 Difference]: Without dead ends: 463 [2022-01-10 07:07:59,739 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 07:07:59,741 INFO L933 BasicCegarLoop]: 213 mSDtfsCounter, 105 mSDsluCounter, 120 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 333 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 07:07:59,741 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [105 Valid, 333 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 07:07:59,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 463 states. [2022-01-10 07:07:59,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 463 to 461. [2022-01-10 07:07:59,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 461 states, 460 states have (on average 1.5478260869565217) internal successors, (712), 460 states have internal predecessors, (712), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:07:59,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 461 states to 461 states and 712 transitions. [2022-01-10 07:07:59,766 INFO L78 Accepts]: Start accepts. Automaton has 461 states and 712 transitions. Word has length 50 [2022-01-10 07:07:59,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 07:07:59,766 INFO L470 AbstractCegarLoop]: Abstraction has 461 states and 712 transitions. [2022-01-10 07:07:59,766 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 3 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:07:59,766 INFO L276 IsEmpty]: Start isEmpty. Operand 461 states and 712 transitions. [2022-01-10 07:07:59,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-01-10 07:07:59,767 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 07:07:59,767 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 07:07:59,776 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2022-01-10 07:07:59,974 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 07:07:59,974 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 07:07:59,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 07:07:59,975 INFO L85 PathProgramCache]: Analyzing trace with hash 1706895887, now seen corresponding path program 1 times [2022-01-10 07:07:59,975 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 07:07:59,975 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [224200554] [2022-01-10 07:07:59,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 07:07:59,975 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 07:07:59,976 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 07:07:59,977 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 07:07:59,978 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2022-01-10 07:08:00,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 07:08:00,062 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-10 07:08:00,064 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 07:08:00,155 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 07:08:00,155 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 07:08:00,156 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 07:08:00,156 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [224200554] [2022-01-10 07:08:00,156 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [224200554] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 07:08:00,156 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 07:08:00,156 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 07:08:00,156 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [342896008] [2022-01-10 07:08:00,156 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 07:08:00,157 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 07:08:00,157 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 07:08:00,157 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 07:08:00,157 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 07:08:00,157 INFO L87 Difference]: Start difference. First operand 461 states and 712 transitions. Second operand has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:08:00,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 07:08:00,197 INFO L93 Difference]: Finished difference Result 1201 states and 1874 transitions. [2022-01-10 07:08:00,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 07:08:00,198 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 0 states have call successors, (0), 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 51 [2022-01-10 07:08:00,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 07:08:00,202 INFO L225 Difference]: With dead ends: 1201 [2022-01-10 07:08:00,202 INFO L226 Difference]: Without dead ends: 767 [2022-01-10 07:08:00,204 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 07:08:00,209 INFO L933 BasicCegarLoop]: 194 mSDtfsCounter, 100 mSDsluCounter, 124 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 318 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 07:08:00,210 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [100 Valid, 318 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 07:08:00,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 767 states. [2022-01-10 07:08:00,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 767 to 765. [2022-01-10 07:08:00,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 765 states, 764 states have (on average 1.544502617801047) internal successors, (1180), 764 states have internal predecessors, (1180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:08:00,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 765 states to 765 states and 1180 transitions. [2022-01-10 07:08:00,248 INFO L78 Accepts]: Start accepts. Automaton has 765 states and 1180 transitions. Word has length 51 [2022-01-10 07:08:00,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 07:08:00,249 INFO L470 AbstractCegarLoop]: Abstraction has 765 states and 1180 transitions. [2022-01-10 07:08:00,249 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:08:00,249 INFO L276 IsEmpty]: Start isEmpty. Operand 765 states and 1180 transitions. [2022-01-10 07:08:00,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-01-10 07:08:00,252 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 07:08:00,252 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 07:08:00,273 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2022-01-10 07:08:00,459 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 07:08:00,460 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 07:08:00,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 07:08:00,460 INFO L85 PathProgramCache]: Analyzing trace with hash 1133800764, now seen corresponding path program 1 times [2022-01-10 07:08:00,460 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 07:08:00,460 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1681066461] [2022-01-10 07:08:00,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 07:08:00,461 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 07:08:00,461 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 07:08:00,468 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 07:08:00,470 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2022-01-10 07:08:00,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 07:08:00,534 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 5 conjunts are in the unsatisfiable core [2022-01-10 07:08:00,536 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 07:08:01,140 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 07:08:01,140 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 07:08:01,140 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 07:08:01,141 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1681066461] [2022-01-10 07:08:01,141 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1681066461] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 07:08:01,141 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 07:08:01,141 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-01-10 07:08:01,141 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2113328650] [2022-01-10 07:08:01,141 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 07:08:01,141 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-10 07:08:01,141 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 07:08:01,142 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-10 07:08:01,142 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2022-01-10 07:08:01,142 INFO L87 Difference]: Start difference. First operand 765 states and 1180 transitions. Second operand has 6 states, 6 states have (on average 8.666666666666666) internal successors, (52), 6 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:08:01,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 07:08:01,233 INFO L93 Difference]: Finished difference Result 2152 states and 3311 transitions. [2022-01-10 07:08:01,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-10 07:08:01,234 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 8.666666666666666) internal successors, (52), 6 states have internal predecessors, (52), 0 states have call successors, (0), 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 52 [2022-01-10 07:08:01,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 07:08:01,238 INFO L225 Difference]: With dead ends: 2152 [2022-01-10 07:08:01,238 INFO L226 Difference]: Without dead ends: 1414 [2022-01-10 07:08:01,239 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2022-01-10 07:08:01,239 INFO L933 BasicCegarLoop]: 297 mSDtfsCounter, 268 mSDsluCounter, 412 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 268 SdHoareTripleChecker+Valid, 709 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 43 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 07:08:01,239 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [268 Valid, 709 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 19 Invalid, 0 Unknown, 43 Unchecked, 0.0s Time] [2022-01-10 07:08:01,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1414 states. [2022-01-10 07:08:01,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1414 to 1302. [2022-01-10 07:08:01,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1302 states, 1301 states have (on average 1.5342044581091467) internal successors, (1996), 1301 states have internal predecessors, (1996), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:08:01,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1302 states to 1302 states and 1996 transitions. [2022-01-10 07:08:01,283 INFO L78 Accepts]: Start accepts. Automaton has 1302 states and 1996 transitions. Word has length 52 [2022-01-10 07:08:01,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 07:08:01,283 INFO L470 AbstractCegarLoop]: Abstraction has 1302 states and 1996 transitions. [2022-01-10 07:08:01,284 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.666666666666666) internal successors, (52), 6 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:08:01,284 INFO L276 IsEmpty]: Start isEmpty. Operand 1302 states and 1996 transitions. [2022-01-10 07:08:01,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-01-10 07:08:01,284 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 07:08:01,284 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 07:08:01,292 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2022-01-10 07:08:01,491 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 07:08:01,491 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 07:08:01,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 07:08:01,492 INFO L85 PathProgramCache]: Analyzing trace with hash -2135389787, now seen corresponding path program 1 times [2022-01-10 07:08:01,492 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 07:08:01,492 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1849485738] [2022-01-10 07:08:01,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 07:08:01,492 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 07:08:01,492 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 07:08:01,493 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 07:08:01,494 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2022-01-10 07:08:01,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 07:08:01,555 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-10 07:08:01,556 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 07:08:01,776 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 07:08:01,776 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 07:08:01,776 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 07:08:01,776 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1849485738] [2022-01-10 07:08:01,776 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1849485738] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 07:08:01,776 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 07:08:01,776 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 07:08:01,776 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [506962672] [2022-01-10 07:08:01,776 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 07:08:01,777 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 07:08:01,777 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 07:08:01,777 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 07:08:01,777 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-10 07:08:01,777 INFO L87 Difference]: Start difference. First operand 1302 states and 1996 transitions. Second operand has 5 states, 5 states have (on average 10.8) internal successors, (54), 4 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:08:01,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 07:08:01,895 INFO L93 Difference]: Finished difference Result 2582 states and 3973 transitions. [2022-01-10 07:08:01,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-10 07:08:01,896 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 10.8) internal successors, (54), 4 states have internal predecessors, (54), 0 states have call successors, (0), 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 54 [2022-01-10 07:08:01,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 07:08:01,900 INFO L225 Difference]: With dead ends: 2582 [2022-01-10 07:08:01,900 INFO L226 Difference]: Without dead ends: 1307 [2022-01-10 07:08:01,902 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2022-01-10 07:08:01,902 INFO L933 BasicCegarLoop]: 147 mSDtfsCounter, 22 mSDsluCounter, 230 mSDsCounter, 0 mSdLazyCounter, 100 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 377 SdHoareTripleChecker+Invalid, 161 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 100 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 60 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 07:08:01,902 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 377 Invalid, 161 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 100 Invalid, 0 Unknown, 60 Unchecked, 0.1s Time] [2022-01-10 07:08:01,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1307 states. [2022-01-10 07:08:01,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1307 to 1306. [2022-01-10 07:08:01,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1306 states, 1305 states have (on average 1.5333333333333334) internal successors, (2001), 1305 states have internal predecessors, (2001), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:08:01,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1306 states to 1306 states and 2001 transitions. [2022-01-10 07:08:01,966 INFO L78 Accepts]: Start accepts. Automaton has 1306 states and 2001 transitions. Word has length 54 [2022-01-10 07:08:01,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 07:08:01,966 INFO L470 AbstractCegarLoop]: Abstraction has 1306 states and 2001 transitions. [2022-01-10 07:08:01,966 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.8) internal successors, (54), 4 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:08:01,967 INFO L276 IsEmpty]: Start isEmpty. Operand 1306 states and 2001 transitions. [2022-01-10 07:08:01,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-01-10 07:08:01,969 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 07:08:01,970 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 07:08:01,993 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2022-01-10 07:08:02,181 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 07:08:02,181 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 07:08:02,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 07:08:02,182 INFO L85 PathProgramCache]: Analyzing trace with hash 1662484042, now seen corresponding path program 1 times [2022-01-10 07:08:02,182 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 07:08:02,182 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [928539120] [2022-01-10 07:08:02,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 07:08:02,182 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 07:08:02,183 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 07:08:02,183 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 07:08:02,184 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2022-01-10 07:08:02,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 07:08:02,245 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 5 conjunts are in the unsatisfiable core [2022-01-10 07:08:02,246 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 07:08:02,613 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 07:08:02,613 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 07:08:02,613 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 07:08:02,613 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [928539120] [2022-01-10 07:08:02,613 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [928539120] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 07:08:02,613 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 07:08:02,613 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-01-10 07:08:02,613 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1606661370] [2022-01-10 07:08:02,613 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 07:08:02,614 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-10 07:08:02,614 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 07:08:02,614 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-10 07:08:02,614 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2022-01-10 07:08:02,614 INFO L87 Difference]: Start difference. First operand 1306 states and 2001 transitions. Second operand has 6 states, 6 states have (on average 9.0) internal successors, (54), 6 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:08:02,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 07:08:02,840 INFO L93 Difference]: Finished difference Result 7681 states and 11846 transitions. [2022-01-10 07:08:02,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-10 07:08:02,841 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 9.0) internal successors, (54), 6 states have internal predecessors, (54), 0 states have call successors, (0), 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 54 [2022-01-10 07:08:02,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 07:08:02,857 INFO L225 Difference]: With dead ends: 7681 [2022-01-10 07:08:02,858 INFO L226 Difference]: Without dead ends: 6406 [2022-01-10 07:08:02,860 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2022-01-10 07:08:02,860 INFO L933 BasicCegarLoop]: 150 mSDtfsCounter, 762 mSDsluCounter, 609 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 762 SdHoareTripleChecker+Valid, 759 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 07:08:02,861 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [762 Valid, 759 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-10 07:08:02,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6406 states. [2022-01-10 07:08:03,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6406 to 2579. [2022-01-10 07:08:03,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2579 states, 2578 states have (on average 1.513188518231187) internal successors, (3901), 2578 states have internal predecessors, (3901), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:08:03,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2579 states to 2579 states and 3901 transitions. [2022-01-10 07:08:03,037 INFO L78 Accepts]: Start accepts. Automaton has 2579 states and 3901 transitions. Word has length 54 [2022-01-10 07:08:03,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 07:08:03,038 INFO L470 AbstractCegarLoop]: Abstraction has 2579 states and 3901 transitions. [2022-01-10 07:08:03,038 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.0) internal successors, (54), 6 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:08:03,039 INFO L276 IsEmpty]: Start isEmpty. Operand 2579 states and 3901 transitions. [2022-01-10 07:08:03,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-01-10 07:08:03,043 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 07:08:03,043 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 07:08:03,055 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2022-01-10 07:08:03,255 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 07:08:03,255 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 07:08:03,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 07:08:03,256 INFO L85 PathProgramCache]: Analyzing trace with hash -22058530, now seen corresponding path program 1 times [2022-01-10 07:08:03,256 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 07:08:03,256 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [705611181] [2022-01-10 07:08:03,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 07:08:03,256 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 07:08:03,257 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 07:08:03,257 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 07:08:03,259 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2022-01-10 07:08:03,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 07:08:03,317 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-10 07:08:03,318 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 07:08:03,382 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 07:08:03,382 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 07:08:03,383 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 07:08:03,383 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [705611181] [2022-01-10 07:08:03,383 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [705611181] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 07:08:03,383 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 07:08:03,383 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 07:08:03,383 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [783113920] [2022-01-10 07:08:03,383 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 07:08:03,384 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-10 07:08:03,384 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 07:08:03,384 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-10 07:08:03,384 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-10 07:08:03,384 INFO L87 Difference]: Start difference. First operand 2579 states and 3901 transitions. Second operand has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:08:03,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 07:08:03,611 INFO L93 Difference]: Finished difference Result 5263 states and 7906 transitions. [2022-01-10 07:08:03,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-10 07:08:03,611 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 0 states have call successors, (0), 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 55 [2022-01-10 07:08:03,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 07:08:03,625 INFO L225 Difference]: With dead ends: 5263 [2022-01-10 07:08:03,625 INFO L226 Difference]: Without dead ends: 5261 [2022-01-10 07:08:03,626 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-10 07:08:03,627 INFO L933 BasicCegarLoop]: 232 mSDtfsCounter, 242 mSDsluCounter, 299 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 242 SdHoareTripleChecker+Valid, 531 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 07:08:03,627 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [242 Valid, 531 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 07:08:03,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5261 states. [2022-01-10 07:08:03,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5261 to 2715. [2022-01-10 07:08:03,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2715 states, 2714 states have (on average 1.4874723655121591) internal successors, (4037), 2714 states have internal predecessors, (4037), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:08:03,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2715 states to 2715 states and 4037 transitions. [2022-01-10 07:08:03,782 INFO L78 Accepts]: Start accepts. Automaton has 2715 states and 4037 transitions. Word has length 55 [2022-01-10 07:08:03,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 07:08:03,783 INFO L470 AbstractCegarLoop]: Abstraction has 2715 states and 4037 transitions. [2022-01-10 07:08:03,783 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:08:03,783 INFO L276 IsEmpty]: Start isEmpty. Operand 2715 states and 4037 transitions. [2022-01-10 07:08:03,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-01-10 07:08:03,783 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 07:08:03,783 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 07:08:03,792 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (9)] Ended with exit code 0 [2022-01-10 07:08:03,990 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 07:08:03,990 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 07:08:03,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 07:08:03,991 INFO L85 PathProgramCache]: Analyzing trace with hash -673241382, now seen corresponding path program 1 times [2022-01-10 07:08:03,991 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 07:08:03,991 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1099867603] [2022-01-10 07:08:03,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 07:08:03,991 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 07:08:03,991 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 07:08:03,992 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 07:08:03,994 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2022-01-10 07:08:04,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 07:08:04,055 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-10 07:08:04,056 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 07:08:04,135 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 07:08:04,135 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 07:08:04,135 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 07:08:04,135 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1099867603] [2022-01-10 07:08:04,135 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1099867603] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 07:08:04,135 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 07:08:04,135 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 07:08:04,135 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [908489352] [2022-01-10 07:08:04,135 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 07:08:04,136 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 07:08:04,136 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 07:08:04,136 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 07:08:04,136 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 07:08:04,136 INFO L87 Difference]: Start difference. First operand 2715 states and 4037 transitions. Second operand has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 3 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:08:04,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 07:08:04,302 INFO L93 Difference]: Finished difference Result 6791 states and 10125 transitions. [2022-01-10 07:08:04,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 07:08:04,302 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 3 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2022-01-10 07:08:04,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 07:08:04,313 INFO L225 Difference]: With dead ends: 6791 [2022-01-10 07:08:04,313 INFO L226 Difference]: Without dead ends: 4107 [2022-01-10 07:08:04,315 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 07:08:04,316 INFO L933 BasicCegarLoop]: 185 mSDtfsCounter, 90 mSDsluCounter, 124 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 309 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 07:08:04,317 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [90 Valid, 309 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 07:08:04,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4107 states. [2022-01-10 07:08:04,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4107 to 4105. [2022-01-10 07:08:04,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4105 states, 4104 states have (on average 1.482699805068226) internal successors, (6085), 4104 states have internal predecessors, (6085), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:08:04,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4105 states to 4105 states and 6085 transitions. [2022-01-10 07:08:04,532 INFO L78 Accepts]: Start accepts. Automaton has 4105 states and 6085 transitions. Word has length 56 [2022-01-10 07:08:04,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 07:08:04,532 INFO L470 AbstractCegarLoop]: Abstraction has 4105 states and 6085 transitions. [2022-01-10 07:08:04,532 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 3 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:08:04,532 INFO L276 IsEmpty]: Start isEmpty. Operand 4105 states and 6085 transitions. [2022-01-10 07:08:04,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2022-01-10 07:08:04,534 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 07:08:04,534 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 07:08:04,547 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2022-01-10 07:08:04,741 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 07:08:04,741 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 07:08:04,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 07:08:04,742 INFO L85 PathProgramCache]: Analyzing trace with hash 1821600213, now seen corresponding path program 1 times [2022-01-10 07:08:04,742 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 07:08:04,742 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [617529951] [2022-01-10 07:08:04,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 07:08:04,742 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 07:08:04,742 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 07:08:04,743 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 07:08:04,747 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2022-01-10 07:08:04,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 07:08:04,818 INFO L263 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-10 07:08:04,819 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 07:08:05,486 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 07:08:05,487 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 07:08:05,749 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 07:08:05,749 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 07:08:05,750 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [617529951] [2022-01-10 07:08:05,750 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [617529951] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 07:08:05,750 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 07:08:05,750 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2022-01-10 07:08:05,750 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [938043000] [2022-01-10 07:08:05,750 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 07:08:05,750 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-10 07:08:05,750 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 07:08:05,751 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-10 07:08:05,751 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2022-01-10 07:08:05,751 INFO L87 Difference]: Start difference. First operand 4105 states and 6085 transitions. Second operand has 16 states, 16 states have (on average 8.625) internal successors, (138), 15 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:08:06,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 07:08:06,365 INFO L93 Difference]: Finished difference Result 9701 states and 14286 transitions. [2022-01-10 07:08:06,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-10 07:08:06,365 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 8.625) internal successors, (138), 15 states have internal predecessors, (138), 0 states have call successors, (0), 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 77 [2022-01-10 07:08:06,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 07:08:06,393 INFO L225 Difference]: With dead ends: 9701 [2022-01-10 07:08:06,393 INFO L226 Difference]: Without dead ends: 5627 [2022-01-10 07:08:06,398 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 139 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=107, Invalid=399, Unknown=0, NotChecked=0, Total=506 [2022-01-10 07:08:06,398 INFO L933 BasicCegarLoop]: 283 mSDtfsCounter, 348 mSDsluCounter, 2407 mSDsCounter, 0 mSdLazyCounter, 405 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 348 SdHoareTripleChecker+Valid, 2690 SdHoareTripleChecker+Invalid, 1526 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 405 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1115 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-10 07:08:06,399 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [348 Valid, 2690 Invalid, 1526 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 405 Invalid, 0 Unknown, 1115 Unchecked, 0.2s Time] [2022-01-10 07:08:06,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5627 states. [2022-01-10 07:08:06,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5627 to 4165. [2022-01-10 07:08:06,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4165 states, 4164 states have (on average 1.4817483189241114) internal successors, (6170), 4164 states have internal predecessors, (6170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:08:06,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4165 states to 4165 states and 6170 transitions. [2022-01-10 07:08:06,618 INFO L78 Accepts]: Start accepts. Automaton has 4165 states and 6170 transitions. Word has length 77 [2022-01-10 07:08:06,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 07:08:06,618 INFO L470 AbstractCegarLoop]: Abstraction has 4165 states and 6170 transitions. [2022-01-10 07:08:06,618 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 8.625) internal successors, (138), 15 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:08:06,618 INFO L276 IsEmpty]: Start isEmpty. Operand 4165 states and 6170 transitions. [2022-01-10 07:08:06,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2022-01-10 07:08:06,623 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 07:08:06,623 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 07:08:06,631 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2022-01-10 07:08:06,830 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 07:08:06,831 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 07:08:06,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 07:08:06,831 INFO L85 PathProgramCache]: Analyzing trace with hash -318171156, now seen corresponding path program 1 times [2022-01-10 07:08:06,831 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 07:08:06,831 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2049313190] [2022-01-10 07:08:06,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 07:08:06,832 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 07:08:06,832 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 07:08:06,833 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 07:08:06,834 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2022-01-10 07:08:06,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 07:08:06,899 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-10 07:08:06,900 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 07:08:07,146 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-01-10 07:08:07,146 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 07:08:07,146 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 07:08:07,146 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2049313190] [2022-01-10 07:08:07,146 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2049313190] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 07:08:07,147 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 07:08:07,147 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 07:08:07,147 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2077854400] [2022-01-10 07:08:07,147 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 07:08:07,147 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 07:08:07,147 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 07:08:07,147 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 07:08:07,148 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-10 07:08:07,148 INFO L87 Difference]: Start difference. First operand 4165 states and 6170 transitions. Second operand has 5 states, 5 states have (on average 14.4) internal successors, (72), 4 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:08:07,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 07:08:07,391 INFO L93 Difference]: Finished difference Result 8247 states and 12236 transitions. [2022-01-10 07:08:07,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-10 07:08:07,392 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 14.4) internal successors, (72), 4 states have internal predecessors, (72), 0 states have call successors, (0), 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 77 [2022-01-10 07:08:07,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 07:08:07,399 INFO L225 Difference]: With dead ends: 8247 [2022-01-10 07:08:07,399 INFO L226 Difference]: Without dead ends: 4173 [2022-01-10 07:08:07,404 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2022-01-10 07:08:07,404 INFO L933 BasicCegarLoop]: 143 mSDtfsCounter, 39 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 245 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 14 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 07:08:07,404 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 245 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 45 Invalid, 0 Unknown, 14 Unchecked, 0.0s Time] [2022-01-10 07:08:07,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4173 states. [2022-01-10 07:08:07,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4173 to 4171. [2022-01-10 07:08:07,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4171 states, 4170 states have (on average 1.4815347721822543) internal successors, (6178), 4170 states have internal predecessors, (6178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:08:07,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4171 states to 4171 states and 6178 transitions. [2022-01-10 07:08:07,597 INFO L78 Accepts]: Start accepts. Automaton has 4171 states and 6178 transitions. Word has length 77 [2022-01-10 07:08:07,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 07:08:07,597 INFO L470 AbstractCegarLoop]: Abstraction has 4171 states and 6178 transitions. [2022-01-10 07:08:07,597 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.4) internal successors, (72), 4 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:08:07,597 INFO L276 IsEmpty]: Start isEmpty. Operand 4171 states and 6178 transitions. [2022-01-10 07:08:07,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2022-01-10 07:08:07,599 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 07:08:07,599 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 07:08:07,619 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (12)] Ended with exit code 0 [2022-01-10 07:08:07,806 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 07:08:07,807 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 07:08:07,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 07:08:07,807 INFO L85 PathProgramCache]: Analyzing trace with hash 669257041, now seen corresponding path program 1 times [2022-01-10 07:08:07,808 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 07:08:07,808 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [305500157] [2022-01-10 07:08:07,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 07:08:07,808 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 07:08:07,808 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 07:08:07,809 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 07:08:07,809 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2022-01-10 07:08:07,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 07:08:07,890 INFO L263 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-10 07:08:07,891 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 07:08:08,600 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 07:08:08,600 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 07:08:08,882 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 07:08:08,883 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 07:08:08,883 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [305500157] [2022-01-10 07:08:08,883 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [305500157] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 07:08:08,883 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 07:08:08,883 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2022-01-10 07:08:08,883 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1797192794] [2022-01-10 07:08:08,883 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 07:08:08,883 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-10 07:08:08,883 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 07:08:08,884 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-10 07:08:08,884 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2022-01-10 07:08:08,884 INFO L87 Difference]: Start difference. First operand 4171 states and 6178 transitions. Second operand has 16 states, 16 states have (on average 8.875) internal successors, (142), 15 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:08:09,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 07:08:09,426 INFO L93 Difference]: Finished difference Result 10931 states and 16227 transitions. [2022-01-10 07:08:09,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-01-10 07:08:09,426 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 8.875) internal successors, (142), 15 states have internal predecessors, (142), 0 states have call successors, (0), 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 77 [2022-01-10 07:08:09,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 07:08:09,438 INFO L225 Difference]: With dead ends: 10931 [2022-01-10 07:08:09,439 INFO L226 Difference]: Without dead ends: 6857 [2022-01-10 07:08:09,444 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 138 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2022-01-10 07:08:09,444 INFO L933 BasicCegarLoop]: 237 mSDtfsCounter, 205 mSDsluCounter, 1930 mSDsCounter, 0 mSdLazyCounter, 520 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 205 SdHoareTripleChecker+Valid, 2167 SdHoareTripleChecker+Invalid, 805 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 520 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 281 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-10 07:08:09,445 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [205 Valid, 2167 Invalid, 805 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 520 Invalid, 0 Unknown, 281 Unchecked, 0.2s Time] [2022-01-10 07:08:09,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6857 states. [2022-01-10 07:08:09,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6857 to 6533. [2022-01-10 07:08:09,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6533 states, 6532 states have (on average 1.4680036742192284) internal successors, (9589), 6532 states have internal predecessors, (9589), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:08:09,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6533 states to 6533 states and 9589 transitions. [2022-01-10 07:08:09,773 INFO L78 Accepts]: Start accepts. Automaton has 6533 states and 9589 transitions. Word has length 77 [2022-01-10 07:08:09,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 07:08:09,773 INFO L470 AbstractCegarLoop]: Abstraction has 6533 states and 9589 transitions. [2022-01-10 07:08:09,774 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 8.875) internal successors, (142), 15 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:08:09,774 INFO L276 IsEmpty]: Start isEmpty. Operand 6533 states and 9589 transitions. [2022-01-10 07:08:09,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2022-01-10 07:08:09,777 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 07:08:09,777 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 07:08:09,783 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2022-01-10 07:08:09,983 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 07:08:09,984 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 07:08:09,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 07:08:09,984 INFO L85 PathProgramCache]: Analyzing trace with hash -174524948, now seen corresponding path program 1 times [2022-01-10 07:08:09,985 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 07:08:09,985 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [834377016] [2022-01-10 07:08:09,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 07:08:09,985 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 07:08:09,985 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 07:08:09,986 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 07:08:09,986 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2022-01-10 07:08:10,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 07:08:10,058 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-10 07:08:10,060 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 07:08:10,337 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-01-10 07:08:10,337 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 07:08:10,337 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 07:08:10,337 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [834377016] [2022-01-10 07:08:10,337 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [834377016] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 07:08:10,337 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 07:08:10,338 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 07:08:10,338 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1186479018] [2022-01-10 07:08:10,338 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 07:08:10,338 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 07:08:10,338 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 07:08:10,338 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 07:08:10,338 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-10 07:08:10,339 INFO L87 Difference]: Start difference. First operand 6533 states and 9589 transitions. Second operand has 5 states, 5 states have (on average 14.8) internal successors, (74), 4 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:08:10,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 07:08:10,681 INFO L93 Difference]: Finished difference Result 12936 states and 19011 transitions. [2022-01-10 07:08:10,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-10 07:08:10,682 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 14.8) internal successors, (74), 4 states have internal predecessors, (74), 0 states have call successors, (0), 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 77 [2022-01-10 07:08:10,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 07:08:10,693 INFO L225 Difference]: With dead ends: 12936 [2022-01-10 07:08:10,693 INFO L226 Difference]: Without dead ends: 6548 [2022-01-10 07:08:10,698 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2022-01-10 07:08:10,698 INFO L933 BasicCegarLoop]: 136 mSDtfsCounter, 39 mSDsluCounter, 129 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 265 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 21 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 07:08:10,699 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 265 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 36 Invalid, 0 Unknown, 21 Unchecked, 0.0s Time] [2022-01-10 07:08:10,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6548 states. [2022-01-10 07:08:10,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6548 to 6544. [2022-01-10 07:08:10,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6544 states, 6543 states have (on average 1.4676753782668501) internal successors, (9603), 6543 states have internal predecessors, (9603), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:08:10,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6544 states to 6544 states and 9603 transitions. [2022-01-10 07:08:10,994 INFO L78 Accepts]: Start accepts. Automaton has 6544 states and 9603 transitions. Word has length 77 [2022-01-10 07:08:10,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 07:08:10,994 INFO L470 AbstractCegarLoop]: Abstraction has 6544 states and 9603 transitions. [2022-01-10 07:08:10,994 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.8) internal successors, (74), 4 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:08:10,995 INFO L276 IsEmpty]: Start isEmpty. Operand 6544 states and 9603 transitions. [2022-01-10 07:08:10,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2022-01-10 07:08:10,998 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 07:08:10,998 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 07:08:11,005 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2022-01-10 07:08:11,205 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 07:08:11,205 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 07:08:11,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 07:08:11,205 INFO L85 PathProgramCache]: Analyzing trace with hash 1675589009, now seen corresponding path program 1 times [2022-01-10 07:08:11,206 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 07:08:11,206 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [192294773] [2022-01-10 07:08:11,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 07:08:11,218 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 07:08:11,219 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 07:08:11,219 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 07:08:11,220 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2022-01-10 07:08:11,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 07:08:11,284 INFO L263 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-10 07:08:11,285 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 07:08:11,711 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 11 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 07:08:11,711 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 07:08:12,091 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 11 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 07:08:12,091 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 07:08:12,091 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [192294773] [2022-01-10 07:08:12,091 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [192294773] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 07:08:12,091 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 07:08:12,091 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2022-01-10 07:08:12,091 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [474461796] [2022-01-10 07:08:12,091 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 07:08:12,092 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-10 07:08:12,092 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 07:08:12,092 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-10 07:08:12,092 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2022-01-10 07:08:12,092 INFO L87 Difference]: Start difference. First operand 6544 states and 9603 transitions. Second operand has 16 states, 16 states have (on average 8.375) internal successors, (134), 15 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:08:12,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 07:08:12,683 INFO L93 Difference]: Finished difference Result 17519 states and 25766 transitions. [2022-01-10 07:08:12,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-01-10 07:08:12,684 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 8.375) internal successors, (134), 15 states have internal predecessors, (134), 0 states have call successors, (0), 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 77 [2022-01-10 07:08:12,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 07:08:12,705 INFO L225 Difference]: With dead ends: 17519 [2022-01-10 07:08:12,705 INFO L226 Difference]: Without dead ends: 11131 [2022-01-10 07:08:12,739 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 138 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=90, Invalid=330, Unknown=0, NotChecked=0, Total=420 [2022-01-10 07:08:12,740 INFO L933 BasicCegarLoop]: 193 mSDtfsCounter, 181 mSDsluCounter, 1326 mSDsCounter, 0 mSdLazyCounter, 179 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 181 SdHoareTripleChecker+Valid, 1519 SdHoareTripleChecker+Invalid, 341 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 179 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 155 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 07:08:12,740 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [181 Valid, 1519 Invalid, 341 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 179 Invalid, 0 Unknown, 155 Unchecked, 0.1s Time] [2022-01-10 07:08:12,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11131 states. [2022-01-10 07:08:13,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11131 to 10599. [2022-01-10 07:08:13,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10599 states, 10598 states have (on average 1.4564068692206076) internal successors, (15435), 10598 states have internal predecessors, (15435), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:08:13,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10599 states to 10599 states and 15435 transitions. [2022-01-10 07:08:13,256 INFO L78 Accepts]: Start accepts. Automaton has 10599 states and 15435 transitions. Word has length 77 [2022-01-10 07:08:13,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 07:08:13,256 INFO L470 AbstractCegarLoop]: Abstraction has 10599 states and 15435 transitions. [2022-01-10 07:08:13,257 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 8.375) internal successors, (134), 15 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:08:13,257 INFO L276 IsEmpty]: Start isEmpty. Operand 10599 states and 15435 transitions. [2022-01-10 07:08:13,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2022-01-10 07:08:13,261 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 07:08:13,261 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 07:08:13,268 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2022-01-10 07:08:13,468 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 07:08:13,468 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 07:08:13,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 07:08:13,468 INFO L85 PathProgramCache]: Analyzing trace with hash 942662037, now seen corresponding path program 1 times [2022-01-10 07:08:13,468 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 07:08:13,469 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1081074969] [2022-01-10 07:08:13,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 07:08:13,469 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 07:08:13,469 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 07:08:13,470 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 07:08:13,471 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2022-01-10 07:08:13,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 07:08:13,536 INFO L263 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-10 07:08:13,537 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 07:08:14,170 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 07:08:14,170 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 07:08:14,475 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 07:08:14,476 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 07:08:14,476 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1081074969] [2022-01-10 07:08:14,476 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1081074969] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 07:08:14,476 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 07:08:14,476 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2022-01-10 07:08:14,476 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [135246967] [2022-01-10 07:08:14,476 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 07:08:14,476 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-10 07:08:14,477 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 07:08:14,477 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-10 07:08:14,477 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2022-01-10 07:08:14,477 INFO L87 Difference]: Start difference. First operand 10599 states and 15435 transitions. Second operand has 16 states, 16 states have (on average 9.125) internal successors, (146), 15 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:08:15,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 07:08:15,437 INFO L93 Difference]: Finished difference Result 27464 states and 40002 transitions. [2022-01-10 07:08:15,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-01-10 07:08:15,438 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 9.125) internal successors, (146), 15 states have internal predecessors, (146), 0 states have call successors, (0), 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 77 [2022-01-10 07:08:15,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 07:08:15,463 INFO L225 Difference]: With dead ends: 27464 [2022-01-10 07:08:15,464 INFO L226 Difference]: Without dead ends: 17010 [2022-01-10 07:08:15,480 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 138 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=90, Invalid=330, Unknown=0, NotChecked=0, Total=420 [2022-01-10 07:08:15,480 INFO L933 BasicCegarLoop]: 248 mSDtfsCounter, 460 mSDsluCounter, 1466 mSDsCounter, 0 mSdLazyCounter, 330 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 460 SdHoareTripleChecker+Valid, 1714 SdHoareTripleChecker+Invalid, 722 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 330 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 387 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-10 07:08:15,480 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [460 Valid, 1714 Invalid, 722 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 330 Invalid, 0 Unknown, 387 Unchecked, 0.2s Time] [2022-01-10 07:08:15,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17010 states. [2022-01-10 07:08:16,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17010 to 15638. [2022-01-10 07:08:16,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15638 states, 15637 states have (on average 1.448359659781288) internal successors, (22648), 15637 states have internal predecessors, (22648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:08:16,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15638 states to 15638 states and 22648 transitions. [2022-01-10 07:08:16,344 INFO L78 Accepts]: Start accepts. Automaton has 15638 states and 22648 transitions. Word has length 77 [2022-01-10 07:08:16,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 07:08:16,344 INFO L470 AbstractCegarLoop]: Abstraction has 15638 states and 22648 transitions. [2022-01-10 07:08:16,344 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 9.125) internal successors, (146), 15 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:08:16,344 INFO L276 IsEmpty]: Start isEmpty. Operand 15638 states and 22648 transitions. [2022-01-10 07:08:16,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2022-01-10 07:08:16,350 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 07:08:16,350 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 07:08:16,357 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (16)] Ended with exit code 0 [2022-01-10 07:08:16,557 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 07:08:16,557 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 07:08:16,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 07:08:16,557 INFO L85 PathProgramCache]: Analyzing trace with hash -642817510, now seen corresponding path program 1 times [2022-01-10 07:08:16,558 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 07:08:16,558 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [68451467] [2022-01-10 07:08:16,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 07:08:16,558 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 07:08:16,558 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 07:08:16,567 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 07:08:16,568 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2022-01-10 07:08:16,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 07:08:16,633 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-10 07:08:16,634 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 07:08:16,845 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-01-10 07:08:16,845 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 07:08:16,845 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 07:08:16,845 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [68451467] [2022-01-10 07:08:16,845 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [68451467] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 07:08:16,845 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 07:08:16,845 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 07:08:16,846 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1966921548] [2022-01-10 07:08:16,846 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 07:08:16,846 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 07:08:16,846 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 07:08:16,846 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 07:08:16,847 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-10 07:08:16,847 INFO L87 Difference]: Start difference. First operand 15638 states and 22648 transitions. Second operand has 5 states, 5 states have (on average 14.6) internal successors, (73), 4 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:08:17,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 07:08:17,524 INFO L93 Difference]: Finished difference Result 31063 states and 45017 transitions. [2022-01-10 07:08:17,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-10 07:08:17,531 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 14.6) internal successors, (73), 4 states have internal predecessors, (73), 0 states have call successors, (0), 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 77 [2022-01-10 07:08:17,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 07:08:17,554 INFO L225 Difference]: With dead ends: 31063 [2022-01-10 07:08:17,554 INFO L226 Difference]: Without dead ends: 15641 [2022-01-10 07:08:17,572 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2022-01-10 07:08:17,572 INFO L933 BasicCegarLoop]: 139 mSDtfsCounter, 40 mSDsluCounter, 115 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 254 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 18 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 07:08:17,573 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [40 Valid, 254 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 41 Invalid, 0 Unknown, 18 Unchecked, 0.0s Time] [2022-01-10 07:08:17,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15641 states. [2022-01-10 07:08:18,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15641 to 15638. [2022-01-10 07:08:18,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15638 states, 15637 states have (on average 1.4482957088955681) internal successors, (22647), 15637 states have internal predecessors, (22647), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:08:18,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15638 states to 15638 states and 22647 transitions. [2022-01-10 07:08:18,429 INFO L78 Accepts]: Start accepts. Automaton has 15638 states and 22647 transitions. Word has length 77 [2022-01-10 07:08:18,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 07:08:18,430 INFO L470 AbstractCegarLoop]: Abstraction has 15638 states and 22647 transitions. [2022-01-10 07:08:18,430 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.6) internal successors, (73), 4 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:08:18,430 INFO L276 IsEmpty]: Start isEmpty. Operand 15638 states and 22647 transitions. [2022-01-10 07:08:18,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2022-01-10 07:08:18,436 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 07:08:18,436 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 07:08:18,445 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2022-01-10 07:08:18,645 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 07:08:18,645 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 07:08:18,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 07:08:18,646 INFO L85 PathProgramCache]: Analyzing trace with hash 1438319223, now seen corresponding path program 1 times [2022-01-10 07:08:18,646 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 07:08:18,646 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1638888066] [2022-01-10 07:08:18,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 07:08:18,646 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 07:08:18,646 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 07:08:18,647 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 07:08:18,648 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2022-01-10 07:08:18,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 07:08:18,712 INFO L263 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-10 07:08:18,713 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 07:08:18,797 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-01-10 07:08:18,797 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 07:08:18,797 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 07:08:18,797 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1638888066] [2022-01-10 07:08:18,798 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1638888066] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 07:08:18,798 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 07:08:18,798 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 07:08:18,798 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1005998818] [2022-01-10 07:08:18,798 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 07:08:18,798 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 07:08:18,798 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 07:08:18,799 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 07:08:18,799 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 07:08:18,799 INFO L87 Difference]: Start difference. First operand 15638 states and 22647 transitions. Second operand has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:08:20,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 07:08:20,001 INFO L93 Difference]: Finished difference Result 36842 states and 53226 transitions. [2022-01-10 07:08:20,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 07:08:20,002 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 0 states have call successors, (0), 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 78 [2022-01-10 07:08:20,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 07:08:20,032 INFO L225 Difference]: With dead ends: 36842 [2022-01-10 07:08:20,032 INFO L226 Difference]: Without dead ends: 21414 [2022-01-10 07:08:20,049 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 07:08:20,049 INFO L933 BasicCegarLoop]: 117 mSDtfsCounter, 118 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 118 SdHoareTripleChecker+Valid, 194 SdHoareTripleChecker+Invalid, 90 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 88 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 07:08:20,049 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [118 Valid, 194 Invalid, 90 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 88 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-10 07:08:20,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21414 states. [2022-01-10 07:08:20,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21414 to 15638. [2022-01-10 07:08:20,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15638 states, 15637 states have (on average 1.4415169150092728) internal successors, (22541), 15637 states have internal predecessors, (22541), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:08:20,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15638 states to 15638 states and 22541 transitions. [2022-01-10 07:08:20,884 INFO L78 Accepts]: Start accepts. Automaton has 15638 states and 22541 transitions. Word has length 78 [2022-01-10 07:08:20,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 07:08:20,885 INFO L470 AbstractCegarLoop]: Abstraction has 15638 states and 22541 transitions. [2022-01-10 07:08:20,885 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:08:20,885 INFO L276 IsEmpty]: Start isEmpty. Operand 15638 states and 22541 transitions. [2022-01-10 07:08:20,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2022-01-10 07:08:20,890 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 07:08:20,890 INFO L514 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 07:08:20,897 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2022-01-10 07:08:21,097 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 07:08:21,097 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 07:08:21,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 07:08:21,098 INFO L85 PathProgramCache]: Analyzing trace with hash -1527332366, now seen corresponding path program 1 times [2022-01-10 07:08:21,098 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 07:08:21,098 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1624917321] [2022-01-10 07:08:21,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 07:08:21,098 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 07:08:21,098 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 07:08:21,099 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 07:08:21,100 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2022-01-10 07:08:21,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 07:08:21,165 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-10 07:08:21,167 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 07:08:21,248 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 07:08:21,248 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 07:08:21,248 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 07:08:21,249 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1624917321] [2022-01-10 07:08:21,249 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1624917321] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 07:08:21,249 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 07:08:21,249 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 07:08:21,249 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1658909965] [2022-01-10 07:08:21,249 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 07:08:21,249 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 07:08:21,249 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 07:08:21,249 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 07:08:21,250 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 07:08:21,250 INFO L87 Difference]: Start difference. First operand 15638 states and 22541 transitions. Second operand has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 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 07:08:21,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 07:08:21,957 INFO L93 Difference]: Finished difference Result 30870 states and 44537 transitions. [2022-01-10 07:08:21,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 07:08:21,957 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 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) Word has length 78 [2022-01-10 07:08:21,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 07:08:21,977 INFO L225 Difference]: With dead ends: 30870 [2022-01-10 07:08:21,977 INFO L226 Difference]: Without dead ends: 15448 [2022-01-10 07:08:21,989 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 07:08:21,990 INFO L933 BasicCegarLoop]: 193 mSDtfsCounter, 86 mSDsluCounter, 137 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 330 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 07:08:21,990 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [86 Valid, 330 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 07:08:21,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15448 states. [2022-01-10 07:08:22,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15448 to 14554. [2022-01-10 07:08:22,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14554 states, 14553 states have (on average 1.4286401429258573) internal successors, (20791), 14553 states have internal predecessors, (20791), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:08:22,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14554 states to 14554 states and 20791 transitions. [2022-01-10 07:08:22,831 INFO L78 Accepts]: Start accepts. Automaton has 14554 states and 20791 transitions. Word has length 78 [2022-01-10 07:08:22,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 07:08:22,832 INFO L470 AbstractCegarLoop]: Abstraction has 14554 states and 20791 transitions. [2022-01-10 07:08:22,832 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 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 07:08:22,832 INFO L276 IsEmpty]: Start isEmpty. Operand 14554 states and 20791 transitions. [2022-01-10 07:08:22,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2022-01-10 07:08:22,835 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 07:08:22,836 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 07:08:22,842 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2022-01-10 07:08:23,040 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 07:08:23,040 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 07:08:23,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 07:08:23,041 INFO L85 PathProgramCache]: Analyzing trace with hash 1365606455, now seen corresponding path program 1 times [2022-01-10 07:08:23,041 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 07:08:23,041 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [864660937] [2022-01-10 07:08:23,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 07:08:23,041 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 07:08:23,041 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 07:08:23,042 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 07:08:23,043 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2022-01-10 07:08:23,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 07:08:23,111 INFO L263 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-10 07:08:23,112 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 07:08:23,199 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 07:08:23,199 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 07:08:23,199 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 07:08:23,199 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [864660937] [2022-01-10 07:08:23,200 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [864660937] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 07:08:23,200 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 07:08:23,200 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 07:08:23,200 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [847235925] [2022-01-10 07:08:23,200 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 07:08:23,200 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 07:08:23,200 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 07:08:23,200 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 07:08:23,201 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 07:08:23,201 INFO L87 Difference]: Start difference. First operand 14554 states and 20791 transitions. Second operand has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 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 07:08:24,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 07:08:24,399 INFO L93 Difference]: Finished difference Result 34915 states and 49917 transitions. [2022-01-10 07:08:24,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 07:08:24,400 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 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) Word has length 78 [2022-01-10 07:08:24,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 07:08:24,429 INFO L225 Difference]: With dead ends: 34915 [2022-01-10 07:08:24,429 INFO L226 Difference]: Without dead ends: 20577 [2022-01-10 07:08:24,446 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 07:08:24,447 INFO L933 BasicCegarLoop]: 178 mSDtfsCounter, 88 mSDsluCounter, 137 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 315 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 07:08:24,447 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [88 Valid, 315 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 07:08:24,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20577 states. [2022-01-10 07:08:25,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20577 to 18800. [2022-01-10 07:08:25,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18800 states, 18799 states have (on average 1.4187988722804405) internal successors, (26672), 18799 states have internal predecessors, (26672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:08:25,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18800 states to 18800 states and 26672 transitions. [2022-01-10 07:08:25,449 INFO L78 Accepts]: Start accepts. Automaton has 18800 states and 26672 transitions. Word has length 78 [2022-01-10 07:08:25,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 07:08:25,450 INFO L470 AbstractCegarLoop]: Abstraction has 18800 states and 26672 transitions. [2022-01-10 07:08:25,450 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 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 07:08:25,450 INFO L276 IsEmpty]: Start isEmpty. Operand 18800 states and 26672 transitions. [2022-01-10 07:08:25,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2022-01-10 07:08:25,454 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 07:08:25,454 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 07:08:25,461 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (20)] Ended with exit code 0 [2022-01-10 07:08:25,654 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 07:08:25,655 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 07:08:25,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 07:08:25,655 INFO L85 PathProgramCache]: Analyzing trace with hash 654192534, now seen corresponding path program 1 times [2022-01-10 07:08:25,655 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 07:08:25,655 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [224857111] [2022-01-10 07:08:25,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 07:08:25,655 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 07:08:25,656 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 07:08:25,656 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 07:08:25,658 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2022-01-10 07:08:25,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 07:08:25,725 INFO L263 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 3 conjunts are in the unsatisfiable core [2022-01-10 07:08:25,726 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 07:08:25,935 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-10 07:08:25,935 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 07:08:26,066 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-10 07:08:26,066 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 07:08:26,066 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [224857111] [2022-01-10 07:08:26,066 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [224857111] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 07:08:26,066 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 07:08:26,066 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2022-01-10 07:08:26,066 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1948783060] [2022-01-10 07:08:26,066 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 07:08:26,067 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-10 07:08:26,067 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 07:08:26,067 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-10 07:08:26,067 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-01-10 07:08:26,067 INFO L87 Difference]: Start difference. First operand 18800 states and 26672 transitions. Second operand has 6 states, 6 states have (on average 24.666666666666668) internal successors, (148), 6 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:08:28,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 07:08:28,639 INFO L93 Difference]: Finished difference Result 63566 states and 90996 transitions. [2022-01-10 07:08:28,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-10 07:08:28,640 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 24.666666666666668) internal successors, (148), 6 states have internal predecessors, (148), 0 states have call successors, (0), 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 78 [2022-01-10 07:08:28,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 07:08:28,719 INFO L225 Difference]: With dead ends: 63566 [2022-01-10 07:08:28,720 INFO L226 Difference]: Without dead ends: 51306 [2022-01-10 07:08:28,737 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 150 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2022-01-10 07:08:28,738 INFO L933 BasicCegarLoop]: 260 mSDtfsCounter, 627 mSDsluCounter, 510 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 627 SdHoareTripleChecker+Valid, 770 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 13 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 07:08:28,738 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [627 Valid, 770 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 13 Invalid, 0 Unknown, 13 Unchecked, 0.0s Time] [2022-01-10 07:08:28,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51306 states. [2022-01-10 07:08:31,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51306 to 51296. [2022-01-10 07:08:31,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51296 states, 51295 states have (on average 1.4160054586216981) internal successors, (72634), 51295 states have internal predecessors, (72634), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:08:31,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51296 states to 51296 states and 72634 transitions. [2022-01-10 07:08:31,891 INFO L78 Accepts]: Start accepts. Automaton has 51296 states and 72634 transitions. Word has length 78 [2022-01-10 07:08:31,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 07:08:31,891 INFO L470 AbstractCegarLoop]: Abstraction has 51296 states and 72634 transitions. [2022-01-10 07:08:31,891 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 24.666666666666668) internal successors, (148), 6 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:08:31,891 INFO L276 IsEmpty]: Start isEmpty. Operand 51296 states and 72634 transitions. [2022-01-10 07:08:31,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2022-01-10 07:08:31,895 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 07:08:31,895 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 07:08:31,904 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2022-01-10 07:08:32,095 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 07:08:32,095 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 07:08:32,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 07:08:32,096 INFO L85 PathProgramCache]: Analyzing trace with hash -739881820, now seen corresponding path program 1 times [2022-01-10 07:08:32,096 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 07:08:32,096 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1496895557] [2022-01-10 07:08:32,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 07:08:32,096 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 07:08:32,096 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 07:08:32,097 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 07:08:32,098 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2022-01-10 07:08:32,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 07:08:32,160 INFO L263 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 5 conjunts are in the unsatisfiable core [2022-01-10 07:08:32,161 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 07:08:32,317 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 10 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 07:08:32,317 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 07:08:32,419 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 10 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 07:08:32,420 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 07:08:32,420 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1496895557] [2022-01-10 07:08:32,420 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1496895557] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 07:08:32,420 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 07:08:32,420 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2022-01-10 07:08:32,420 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [520904694] [2022-01-10 07:08:32,420 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 07:08:32,420 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-01-10 07:08:32,420 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 07:08:32,421 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-01-10 07:08:32,421 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2022-01-10 07:08:32,421 INFO L87 Difference]: Start difference. First operand 51296 states and 72634 transitions. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:08:38,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 07:08:38,166 INFO L93 Difference]: Finished difference Result 137804 states and 193569 transitions. [2022-01-10 07:08:38,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-10 07:08:38,167 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 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 78 [2022-01-10 07:08:38,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 07:08:38,306 INFO L225 Difference]: With dead ends: 137804 [2022-01-10 07:08:38,306 INFO L226 Difference]: Without dead ends: 86668 [2022-01-10 07:08:38,354 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 147 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2022-01-10 07:08:38,354 INFO L933 BasicCegarLoop]: 102 mSDtfsCounter, 1009 mSDsluCounter, 325 mSDsCounter, 0 mSdLazyCounter, 192 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1009 SdHoareTripleChecker+Valid, 427 SdHoareTripleChecker+Invalid, 224 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 192 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 07:08:38,354 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1009 Valid, 427 Invalid, 224 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 192 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-10 07:08:38,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86668 states. [2022-01-10 07:08:42,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86668 to 54878. [2022-01-10 07:08:42,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54878 states, 54877 states have (on average 1.3867558357781948) internal successors, (76101), 54877 states have internal predecessors, (76101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:08:42,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54878 states to 54878 states and 76101 transitions. [2022-01-10 07:08:42,566 INFO L78 Accepts]: Start accepts. Automaton has 54878 states and 76101 transitions. Word has length 78 [2022-01-10 07:08:42,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 07:08:42,567 INFO L470 AbstractCegarLoop]: Abstraction has 54878 states and 76101 transitions. [2022-01-10 07:08:42,567 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:08:42,567 INFO L276 IsEmpty]: Start isEmpty. Operand 54878 states and 76101 transitions. [2022-01-10 07:08:42,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2022-01-10 07:08:42,571 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 07:08:42,571 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 07:08:42,577 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2022-01-10 07:08:42,777 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 07:08:42,778 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 07:08:42,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 07:08:42,778 INFO L85 PathProgramCache]: Analyzing trace with hash 2706491, now seen corresponding path program 1 times [2022-01-10 07:08:42,778 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 07:08:42,778 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1452225835] [2022-01-10 07:08:42,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 07:08:42,778 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 07:08:42,779 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 07:08:42,779 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 07:08:42,780 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2022-01-10 07:08:42,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 07:08:42,851 INFO L263 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 5 conjunts are in the unsatisfiable core [2022-01-10 07:08:42,852 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 07:08:43,011 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 07:08:43,012 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 07:08:43,109 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 07:08:43,109 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 07:08:43,109 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1452225835] [2022-01-10 07:08:43,109 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1452225835] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 07:08:43,109 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 07:08:43,109 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2022-01-10 07:08:43,110 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [977562822] [2022-01-10 07:08:43,110 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 07:08:43,110 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-01-10 07:08:43,110 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 07:08:43,110 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-01-10 07:08:43,110 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2022-01-10 07:08:43,111 INFO L87 Difference]: Start difference. First operand 54878 states and 76101 transitions. Second operand has 9 states, 9 states have (on average 15.444444444444445) internal successors, (139), 9 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:08:54,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 07:08:54,260 INFO L93 Difference]: Finished difference Result 215910 states and 297695 transitions. [2022-01-10 07:08:54,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-10 07:08:54,262 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 15.444444444444445) internal successors, (139), 9 states have internal predecessors, (139), 0 states have call successors, (0), 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 78 [2022-01-10 07:08:54,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 07:08:54,556 INFO L225 Difference]: With dead ends: 215910 [2022-01-10 07:08:54,556 INFO L226 Difference]: Without dead ends: 161320 [2022-01-10 07:08:54,622 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 147 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2022-01-10 07:08:54,623 INFO L933 BasicCegarLoop]: 131 mSDtfsCounter, 1646 mSDsluCounter, 352 mSDsCounter, 0 mSdLazyCounter, 257 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1646 SdHoareTripleChecker+Valid, 483 SdHoareTripleChecker+Invalid, 294 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 257 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-10 07:08:54,623 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1646 Valid, 483 Invalid, 294 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 257 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-10 07:08:54,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161320 states. [2022-01-10 07:09:01,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161320 to 75293. [2022-01-10 07:09:01,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75293 states, 75292 states have (on average 1.3722174998671837) internal successors, (103317), 75292 states have internal predecessors, (103317), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:09:01,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75293 states to 75293 states and 103317 transitions. [2022-01-10 07:09:01,404 INFO L78 Accepts]: Start accepts. Automaton has 75293 states and 103317 transitions. Word has length 78 [2022-01-10 07:09:01,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 07:09:01,404 INFO L470 AbstractCegarLoop]: Abstraction has 75293 states and 103317 transitions. [2022-01-10 07:09:01,404 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.444444444444445) internal successors, (139), 9 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:09:01,404 INFO L276 IsEmpty]: Start isEmpty. Operand 75293 states and 103317 transitions. [2022-01-10 07:09:01,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2022-01-10 07:09:01,409 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 07:09:01,409 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 07:09:01,429 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2022-01-10 07:09:01,610 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 07:09:01,610 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 07:09:01,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 07:09:01,610 INFO L85 PathProgramCache]: Analyzing trace with hash 954215672, now seen corresponding path program 1 times [2022-01-10 07:09:01,611 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 07:09:01,611 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [629720194] [2022-01-10 07:09:01,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 07:09:01,611 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 07:09:01,611 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 07:09:01,612 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 07:09:01,614 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2022-01-10 07:09:01,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 07:09:01,687 INFO L263 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-10 07:09:01,688 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 07:09:01,775 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 07:09:01,775 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 07:09:01,775 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 07:09:01,775 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [629720194] [2022-01-10 07:09:01,775 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [629720194] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 07:09:01,775 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 07:09:01,775 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 07:09:01,776 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [302573438] [2022-01-10 07:09:01,776 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 07:09:01,776 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 07:09:01,776 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 07:09:01,776 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 07:09:01,776 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 07:09:01,776 INFO L87 Difference]: Start difference. First operand 75293 states and 103317 transitions. Second operand has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 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)