/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_opt-floodmax.3.3.ufo.BOUNDED-6.pals.c.v+cfa-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-a10ec3b [2022-01-10 07:21:23,254 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-10 07:21:23,256 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-10 07:21:23,319 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-01-10 07:21:23,320 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-01-10 07:21:23,322 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-01-10 07:21:23,324 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-01-10 07:21:23,325 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-01-10 07:21:23,326 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-01-10 07:21:23,327 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-01-10 07:21:23,327 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-01-10 07:21:23,328 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-01-10 07:21:23,328 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-01-10 07:21:23,329 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-01-10 07:21:23,329 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-01-10 07:21:23,330 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-01-10 07:21:23,331 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-01-10 07:21:23,331 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-01-10 07:21:23,332 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-01-10 07:21:23,333 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-01-10 07:21:23,334 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-01-10 07:21:23,336 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-01-10 07:21:23,336 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-01-10 07:21:23,337 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-01-10 07:21:23,338 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-01-10 07:21:23,343 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-10 07:21:23,344 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-10 07:21:23,344 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-10 07:21:23,345 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 07:21:23,358 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-10 07:21:23,358 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-10 07:21:23,358 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-01-10 07:21:23,358 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-01-10 07:21:23,359 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-01-10 07:21:23,359 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-01-10 07:21:23,359 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-01-10 07:21:23,359 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-01-10 07:21:23,360 INFO L138 SettingsManager]: * Use SBE=true [2022-01-10 07:21:23,360 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-10 07:21:23,360 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-10 07:21:23,360 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-10 07:21:23,360 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-10 07:21:23,360 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-10 07:21:23,360 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-10 07:21:23,360 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-01-10 07:21:23,361 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-01-10 07:21:23,361 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-01-10 07:21:23,361 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-10 07:21:23,361 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-10 07:21:23,361 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-10 07:21:23,361 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-10 07:21:23,361 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-10 07:21:23,361 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-10 07:21:23,362 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-10 07:21:23,362 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-01-10 07:21:23,362 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-01-10 07:21:23,362 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2022-01-10 07:21:23,362 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-01-10 07:21:23,362 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-01-10 07:21:23,362 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-01-10 07:21:23,362 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-01-10 07:21:23,363 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-01-10 07:21:23,363 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-10 07:21:23,507 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-10 07:21:23,524 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-10 07:21:23,529 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-10 07:21:23,529 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-10 07:21:23,530 INFO L275 PluginConnector]: CDTParser initialized [2022-01-10 07:21:23,531 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.3.3.ufo.BOUNDED-6.pals.c.v+cfa-reducer.c [2022-01-10 07:21:23,593 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3a4798a49/b7a60c00439f4ebb8df7608e5a308586/FLAGe8a8c9217 [2022-01-10 07:21:23,985 INFO L306 CDTParser]: Found 1 translation units. [2022-01-10 07:21:23,986 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.3.3.ufo.BOUNDED-6.pals.c.v+cfa-reducer.c [2022-01-10 07:21:23,992 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3a4798a49/b7a60c00439f4ebb8df7608e5a308586/FLAGe8a8c9217 [2022-01-10 07:21:24,004 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3a4798a49/b7a60c00439f4ebb8df7608e5a308586 [2022-01-10 07:21:24,006 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-10 07:21:24,008 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-01-10 07:21:24,009 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-10 07:21:24,009 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-10 07:21:24,011 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-10 07:21:24,011 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 07:21:24" (1/1) ... [2022-01-10 07:21:24,013 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4edc33f0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 07:21:24, skipping insertion in model container [2022-01-10 07:21:24,013 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 07:21:24" (1/1) ... [2022-01-10 07:21:24,017 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-10 07:21:24,074 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-10 07:21:24,235 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_opt-floodmax.3.3.ufo.BOUNDED-6.pals.c.v+cfa-reducer.c[7806,7819] [2022-01-10 07:21:24,255 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-10 07:21:24,265 INFO L203 MainTranslator]: Completed pre-run [2022-01-10 07:21:24,295 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_opt-floodmax.3.3.ufo.BOUNDED-6.pals.c.v+cfa-reducer.c[7806,7819] [2022-01-10 07:21:24,310 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-10 07:21:24,321 INFO L208 MainTranslator]: Completed translation [2022-01-10 07:21:24,321 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 07:21:24 WrapperNode [2022-01-10 07:21:24,321 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-10 07:21:24,322 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-01-10 07:21:24,322 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-01-10 07:21:24,322 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-01-10 07:21:24,334 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 07:21:24" (1/1) ... [2022-01-10 07:21:24,342 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 07:21:24" (1/1) ... [2022-01-10 07:21:24,365 INFO L137 Inliner]: procedures = 22, calls = 7, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 615 [2022-01-10 07:21:24,366 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-01-10 07:21:24,366 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-10 07:21:24,366 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-10 07:21:24,366 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-10 07:21:24,372 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 07:21:24" (1/1) ... [2022-01-10 07:21:24,372 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 07:21:24" (1/1) ... [2022-01-10 07:21:24,375 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 07:21:24" (1/1) ... [2022-01-10 07:21:24,375 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 07:21:24" (1/1) ... [2022-01-10 07:21:24,382 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 07:21:24" (1/1) ... [2022-01-10 07:21:24,385 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 07:21:24" (1/1) ... [2022-01-10 07:21:24,386 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 07:21:24" (1/1) ... [2022-01-10 07:21:24,389 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-10 07:21:24,390 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-10 07:21:24,390 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-10 07:21:24,390 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-10 07:21:24,391 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 07:21:24" (1/1) ... [2022-01-10 07:21:24,403 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-10 07:21:24,411 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 07:21:24,420 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 07:21:24,434 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 07:21:24,445 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-10 07:21:24,445 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-01-10 07:21:24,445 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-10 07:21:24,445 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-10 07:21:24,519 INFO L234 CfgBuilder]: Building ICFG [2022-01-10 07:21:24,520 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-10 07:21:24,871 INFO L275 CfgBuilder]: Performing block encoding [2022-01-10 07:21:24,877 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-10 07:21:24,877 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2022-01-10 07:21:24,878 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 07:21:24 BoogieIcfgContainer [2022-01-10 07:21:24,878 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-10 07:21:24,879 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-10 07:21:24,879 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-10 07:21:24,881 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-10 07:21:24,881 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 10.01 07:21:24" (1/3) ... [2022-01-10 07:21:24,882 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@80ba682 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 07:21:24, skipping insertion in model container [2022-01-10 07:21:24,882 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 07:21:24" (2/3) ... [2022-01-10 07:21:24,882 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@80ba682 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 07:21:24, skipping insertion in model container [2022-01-10 07:21:24,882 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 07:21:24" (3/3) ... [2022-01-10 07:21:24,883 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_opt-floodmax.3.3.ufo.BOUNDED-6.pals.c.v+cfa-reducer.c [2022-01-10 07:21:24,886 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-01-10 07:21:24,886 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-10 07:21:24,914 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-10 07:21:24,918 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 07:21:24,918 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-01-10 07:21:24,928 INFO L276 IsEmpty]: Start isEmpty. Operand has 149 states, 147 states have (on average 1.7619047619047619) internal successors, (259), 148 states have internal predecessors, (259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:21:24,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-01-10 07:21:24,937 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 07:21:24,938 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, 1, 1, 1, 1, 1, 1] [2022-01-10 07:21:24,938 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 07:21:24,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 07:21:24,945 INFO L85 PathProgramCache]: Analyzing trace with hash -1468963440, now seen corresponding path program 1 times [2022-01-10 07:21:24,954 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 07:21:24,955 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [234012434] [2022-01-10 07:21:24,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 07:21:24,955 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 07:21:24,956 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 07:21:24,957 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 07:21:24,958 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 07:21:25,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 07:21:25,055 INFO L263 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-10 07:21:25,059 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 07:21:25,193 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 07:21:25,193 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 07:21:25,194 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 07:21:25,194 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [234012434] [2022-01-10 07:21:25,194 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [234012434] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 07:21:25,194 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 07:21:25,194 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 07:21:25,195 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1233415977] [2022-01-10 07:21:25,196 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 07:21:25,198 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 07:21:25,199 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 07:21:25,215 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 07:21:25,215 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 07:21:25,217 INFO L87 Difference]: Start difference. First operand has 149 states, 147 states have (on average 1.7619047619047619) internal successors, (259), 148 states have internal predecessors, (259), 0 states have call successors, (0), 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 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:21:25,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 07:21:25,280 INFO L93 Difference]: Finished difference Result 323 states and 547 transitions. [2022-01-10 07:21:25,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 07:21:25,282 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 62 [2022-01-10 07:21:25,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 07:21:25,289 INFO L225 Difference]: With dead ends: 323 [2022-01-10 07:21:25,289 INFO L226 Difference]: Without dead ends: 225 [2022-01-10 07:21:25,291 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 60 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 07:21:25,293 INFO L933 BasicCegarLoop]: 259 mSDtfsCounter, 150 mSDsluCounter, 193 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 150 SdHoareTripleChecker+Valid, 452 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 07:21:25,294 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [150 Valid, 452 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 07:21:25,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2022-01-10 07:21:25,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 223. [2022-01-10 07:21:25,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 223 states, 222 states have (on average 1.572072072072072) internal successors, (349), 222 states have internal predecessors, (349), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:21:25,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 349 transitions. [2022-01-10 07:21:25,366 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 349 transitions. Word has length 62 [2022-01-10 07:21:25,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 07:21:25,366 INFO L470 AbstractCegarLoop]: Abstraction has 223 states and 349 transitions. [2022-01-10 07:21:25,366 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:21:25,366 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 349 transitions. [2022-01-10 07:21:25,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-01-10 07:21:25,368 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 07:21:25,368 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, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 07:21:25,375 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Ended with exit code 0 [2022-01-10 07:21:25,574 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 07:21:25,574 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 07:21:25,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 07:21:25,575 INFO L85 PathProgramCache]: Analyzing trace with hash -240910223, now seen corresponding path program 1 times [2022-01-10 07:21:25,576 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 07:21:25,576 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [470262856] [2022-01-10 07:21:25,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 07:21:25,576 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 07:21:25,576 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 07:21:25,591 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 07:21:25,592 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 07:21:25,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 07:21:25,688 INFO L263 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 3 conjunts are in the unsatisfiable core [2022-01-10 07:21:25,693 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 07:21:25,822 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 07:21:25,822 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 07:21:25,822 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 07:21:25,822 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [470262856] [2022-01-10 07:21:25,823 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [470262856] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 07:21:25,823 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 07:21:25,823 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 07:21:25,823 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1895236902] [2022-01-10 07:21:25,826 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 07:21:25,827 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-10 07:21:25,827 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 07:21:25,828 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-10 07:21:25,829 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-10 07:21:25,829 INFO L87 Difference]: Start difference. First operand 223 states and 349 transitions. Second operand has 4 states, 4 states have (on average 16.0) internal successors, (64), 4 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:21:25,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 07:21:25,883 INFO L93 Difference]: Finished difference Result 642 states and 1002 transitions. [2022-01-10 07:21:25,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-10 07:21:25,883 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 16.0) internal successors, (64), 4 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 64 [2022-01-10 07:21:25,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 07:21:25,885 INFO L225 Difference]: With dead ends: 642 [2022-01-10 07:21:25,885 INFO L226 Difference]: Without dead ends: 428 [2022-01-10 07:21:25,886 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 61 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 07:21:25,887 INFO L933 BasicCegarLoop]: 317 mSDtfsCounter, 484 mSDsluCounter, 200 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 484 SdHoareTripleChecker+Valid, 517 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 07:21:25,887 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [484 Valid, 517 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 07:21:25,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 428 states. [2022-01-10 07:21:25,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 428 to 426. [2022-01-10 07:21:25,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 426 states, 425 states have (on average 1.5552941176470587) internal successors, (661), 425 states have internal predecessors, (661), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:21:25,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 426 states to 426 states and 661 transitions. [2022-01-10 07:21:25,926 INFO L78 Accepts]: Start accepts. Automaton has 426 states and 661 transitions. Word has length 64 [2022-01-10 07:21:25,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 07:21:25,926 INFO L470 AbstractCegarLoop]: Abstraction has 426 states and 661 transitions. [2022-01-10 07:21:25,926 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.0) internal successors, (64), 4 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:21:25,927 INFO L276 IsEmpty]: Start isEmpty. Operand 426 states and 661 transitions. [2022-01-10 07:21:25,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-01-10 07:21:25,929 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 07:21:25,929 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 07:21:25,941 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2022-01-10 07:21:26,136 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 07:21:26,137 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 07:21:26,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 07:21:26,137 INFO L85 PathProgramCache]: Analyzing trace with hash -1295251643, now seen corresponding path program 1 times [2022-01-10 07:21:26,138 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 07:21:26,138 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2020844877] [2022-01-10 07:21:26,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 07:21:26,138 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 07:21:26,138 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 07:21:26,151 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 07:21:26,152 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 07:21:26,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 07:21:26,249 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-10 07:21:26,251 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 07:21:26,351 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 07:21:26,351 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 07:21:26,351 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 07:21:26,351 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2020844877] [2022-01-10 07:21:26,352 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2020844877] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 07:21:26,353 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 07:21:26,354 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 07:21:26,354 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1895735227] [2022-01-10 07:21:26,354 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 07:21:26,354 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 07:21:26,356 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 07:21:26,356 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 07:21:26,357 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 07:21:26,357 INFO L87 Difference]: Start difference. First operand 426 states and 661 transitions. Second operand has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:21:26,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 07:21:26,383 INFO L93 Difference]: Finished difference Result 1240 states and 1921 transitions. [2022-01-10 07:21:26,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 07:21:26,384 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2022-01-10 07:21:26,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 07:21:26,389 INFO L225 Difference]: With dead ends: 1240 [2022-01-10 07:21:26,389 INFO L226 Difference]: Without dead ends: 842 [2022-01-10 07:21:26,392 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 07:21:26,393 INFO L933 BasicCegarLoop]: 434 mSDtfsCounter, 213 mSDsluCounter, 215 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 213 SdHoareTripleChecker+Valid, 649 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 07:21:26,395 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [213 Valid, 649 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 07:21:26,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 842 states. [2022-01-10 07:21:26,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 842 to 428. [2022-01-10 07:21:26,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 428 states, 427 states have (on average 1.5526932084309133) internal successors, (663), 427 states have internal predecessors, (663), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:21:26,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 428 states to 428 states and 663 transitions. [2022-01-10 07:21:26,431 INFO L78 Accepts]: Start accepts. Automaton has 428 states and 663 transitions. Word has length 65 [2022-01-10 07:21:26,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 07:21:26,432 INFO L470 AbstractCegarLoop]: Abstraction has 428 states and 663 transitions. [2022-01-10 07:21:26,432 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:21:26,432 INFO L276 IsEmpty]: Start isEmpty. Operand 428 states and 663 transitions. [2022-01-10 07:21:26,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-01-10 07:21:26,438 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 07:21:26,439 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 07:21:26,461 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Ended with exit code 0 [2022-01-10 07:21:26,646 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 07:21:26,648 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 07:21:26,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 07:21:26,649 INFO L85 PathProgramCache]: Analyzing trace with hash -809582896, now seen corresponding path program 1 times [2022-01-10 07:21:26,650 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 07:21:26,650 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1381484044] [2022-01-10 07:21:26,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 07:21:26,650 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 07:21:26,651 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 07:21:26,652 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 07:21:26,653 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 07:21:26,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 07:21:26,727 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-10 07:21:26,728 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 07:21:26,802 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 07:21:26,802 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 07:21:26,802 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 07:21:26,802 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1381484044] [2022-01-10 07:21:26,802 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1381484044] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 07:21:26,802 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 07:21:26,802 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 07:21:26,803 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [462617425] [2022-01-10 07:21:26,803 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 07:21:26,803 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 07:21:26,803 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 07:21:26,803 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 07:21:26,803 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 07:21:26,804 INFO L87 Difference]: Start difference. First operand 428 states and 663 transitions. Second operand has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:21:26,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 07:21:26,844 INFO L93 Difference]: Finished difference Result 733 states and 1174 transitions. [2022-01-10 07:21:26,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 07:21:26,854 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2022-01-10 07:21:26,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 07:21:26,856 INFO L225 Difference]: With dead ends: 733 [2022-01-10 07:21:26,856 INFO L226 Difference]: Without dead ends: 563 [2022-01-10 07:21:26,856 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 07:21:26,857 INFO L933 BasicCegarLoop]: 324 mSDtfsCounter, 132 mSDsluCounter, 189 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 132 SdHoareTripleChecker+Valid, 513 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 07:21:26,857 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [132 Valid, 513 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 07:21:26,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 563 states. [2022-01-10 07:21:26,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 563 to 561. [2022-01-10 07:21:26,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 561 states, 560 states have (on average 1.5785714285714285) internal successors, (884), 560 states have internal predecessors, (884), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:21:26,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 561 states to 561 states and 884 transitions. [2022-01-10 07:21:26,900 INFO L78 Accepts]: Start accepts. Automaton has 561 states and 884 transitions. Word has length 65 [2022-01-10 07:21:26,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 07:21:26,901 INFO L470 AbstractCegarLoop]: Abstraction has 561 states and 884 transitions. [2022-01-10 07:21:26,901 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:21:26,901 INFO L276 IsEmpty]: Start isEmpty. Operand 561 states and 884 transitions. [2022-01-10 07:21:26,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-01-10 07:21:26,901 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 07:21:26,901 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 07:21:26,923 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 07:21:27,126 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 07:21:27,127 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 07:21:27,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 07:21:27,127 INFO L85 PathProgramCache]: Analyzing trace with hash -1280521014, now seen corresponding path program 1 times [2022-01-10 07:21:27,127 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 07:21:27,128 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1670343700] [2022-01-10 07:21:27,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 07:21:27,128 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 07:21:27,128 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 07:21:27,130 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 07:21:27,131 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 07:21:27,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 07:21:27,202 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-10 07:21:27,203 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 07:21:27,325 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 07:21:27,326 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 07:21:27,326 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 07:21:27,326 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1670343700] [2022-01-10 07:21:27,327 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1670343700] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 07:21:27,327 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 07:21:27,328 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 07:21:27,328 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1675938031] [2022-01-10 07:21:27,332 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 07:21:27,332 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 07:21:27,332 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 07:21:27,332 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 07:21:27,333 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 07:21:27,333 INFO L87 Difference]: Start difference. First operand 561 states and 884 transitions. Second operand has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:21:27,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 07:21:27,373 INFO L93 Difference]: Finished difference Result 1160 states and 1881 transitions. [2022-01-10 07:21:27,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 07:21:27,374 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2022-01-10 07:21:27,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 07:21:27,378 INFO L225 Difference]: With dead ends: 1160 [2022-01-10 07:21:27,378 INFO L226 Difference]: Without dead ends: 713 [2022-01-10 07:21:27,379 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 07:21:27,380 INFO L933 BasicCegarLoop]: 231 mSDtfsCounter, 137 mSDsluCounter, 201 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 137 SdHoareTripleChecker+Valid, 432 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 07:21:27,380 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [137 Valid, 432 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 07:21:27,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 713 states. [2022-01-10 07:21:27,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 713 to 701. [2022-01-10 07:21:27,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 701 states, 700 states have (on average 1.5942857142857143) internal successors, (1116), 700 states have internal predecessors, (1116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:21:27,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 701 states to 701 states and 1116 transitions. [2022-01-10 07:21:27,407 INFO L78 Accepts]: Start accepts. Automaton has 701 states and 1116 transitions. Word has length 65 [2022-01-10 07:21:27,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 07:21:27,408 INFO L470 AbstractCegarLoop]: Abstraction has 701 states and 1116 transitions. [2022-01-10 07:21:27,408 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:21:27,408 INFO L276 IsEmpty]: Start isEmpty. Operand 701 states and 1116 transitions. [2022-01-10 07:21:27,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-01-10 07:21:27,409 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 07:21:27,409 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 07:21:27,429 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 07:21:27,617 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 07:21:27,617 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 07:21:27,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 07:21:27,618 INFO L85 PathProgramCache]: Analyzing trace with hash -1043547871, now seen corresponding path program 1 times [2022-01-10 07:21:27,619 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 07:21:27,619 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1158321866] [2022-01-10 07:21:27,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 07:21:27,619 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 07:21:27,619 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 07:21:27,622 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 07:21:27,624 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 07:21:27,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 07:21:27,714 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 3 conjunts are in the unsatisfiable core [2022-01-10 07:21:27,723 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 07:21:27,827 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 07:21:27,827 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 07:21:27,828 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 07:21:27,828 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1158321866] [2022-01-10 07:21:27,828 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1158321866] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 07:21:27,828 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 07:21:27,828 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 07:21:27,828 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [25053307] [2022-01-10 07:21:27,828 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 07:21:27,828 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-10 07:21:27,828 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 07:21:27,829 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-10 07:21:27,829 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-10 07:21:27,829 INFO L87 Difference]: Start difference. First operand 701 states and 1116 transitions. Second operand has 4 states, 4 states have (on average 16.5) internal successors, (66), 4 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:21:27,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 07:21:27,916 INFO L93 Difference]: Finished difference Result 1980 states and 3148 transitions. [2022-01-10 07:21:27,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-10 07:21:27,917 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 16.5) internal successors, (66), 4 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 66 [2022-01-10 07:21:27,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 07:21:27,920 INFO L225 Difference]: With dead ends: 1980 [2022-01-10 07:21:27,920 INFO L226 Difference]: Without dead ends: 1291 [2022-01-10 07:21:27,921 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 63 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 07:21:27,921 INFO L933 BasicCegarLoop]: 338 mSDtfsCounter, 455 mSDsluCounter, 200 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 455 SdHoareTripleChecker+Valid, 538 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 07:21:27,921 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [455 Valid, 538 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 07:21:27,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1291 states. [2022-01-10 07:21:27,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1291 to 1289. [2022-01-10 07:21:27,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1289 states, 1288 states have (on average 1.5768633540372672) internal successors, (2031), 1288 states have internal predecessors, (2031), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:21:27,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1289 states to 1289 states and 2031 transitions. [2022-01-10 07:21:27,958 INFO L78 Accepts]: Start accepts. Automaton has 1289 states and 2031 transitions. Word has length 66 [2022-01-10 07:21:27,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 07:21:27,958 INFO L470 AbstractCegarLoop]: Abstraction has 1289 states and 2031 transitions. [2022-01-10 07:21:27,958 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.5) internal successors, (66), 4 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:21:27,958 INFO L276 IsEmpty]: Start isEmpty. Operand 1289 states and 2031 transitions. [2022-01-10 07:21:27,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-01-10 07:21:27,959 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 07:21:27,959 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 07:21:27,973 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Ended with exit code 0 [2022-01-10 07:21:28,169 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 07:21:28,169 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 07:21:28,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 07:21:28,170 INFO L85 PathProgramCache]: Analyzing trace with hash 1097207602, now seen corresponding path program 1 times [2022-01-10 07:21:28,170 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 07:21:28,170 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [312868938] [2022-01-10 07:21:28,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 07:21:28,170 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 07:21:28,170 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 07:21:28,171 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 07:21:28,175 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 07:21:28,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 07:21:28,281 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 3 conjunts are in the unsatisfiable core [2022-01-10 07:21:28,283 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 07:21:28,375 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 07:21:28,375 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 07:21:28,375 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 07:21:28,375 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [312868938] [2022-01-10 07:21:28,375 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [312868938] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 07:21:28,376 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 07:21:28,376 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 07:21:28,376 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1341027098] [2022-01-10 07:21:28,376 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 07:21:28,376 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-10 07:21:28,376 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 07:21:28,376 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-10 07:21:28,376 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-10 07:21:28,376 INFO L87 Difference]: Start difference. First operand 1289 states and 2031 transitions. Second operand has 4 states, 4 states have (on average 16.5) internal successors, (66), 4 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:21:28,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 07:21:28,422 INFO L93 Difference]: Finished difference Result 2306 states and 3632 transitions. [2022-01-10 07:21:28,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-10 07:21:28,422 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 16.5) internal successors, (66), 4 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 66 [2022-01-10 07:21:28,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 07:21:28,425 INFO L225 Difference]: With dead ends: 2306 [2022-01-10 07:21:28,425 INFO L226 Difference]: Without dead ends: 1033 [2022-01-10 07:21:28,426 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 63 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 07:21:28,427 INFO L933 BasicCegarLoop]: 266 mSDtfsCounter, 69 mSDsluCounter, 437 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 703 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 07:21:28,427 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [69 Valid, 703 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 07:21:28,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1033 states. [2022-01-10 07:21:28,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1033 to 1033. [2022-01-10 07:21:28,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1033 states, 1032 states have (on average 1.573643410852713) internal successors, (1624), 1032 states have internal predecessors, (1624), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:21:28,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1033 states to 1033 states and 1624 transitions. [2022-01-10 07:21:28,460 INFO L78 Accepts]: Start accepts. Automaton has 1033 states and 1624 transitions. Word has length 66 [2022-01-10 07:21:28,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 07:21:28,461 INFO L470 AbstractCegarLoop]: Abstraction has 1033 states and 1624 transitions. [2022-01-10 07:21:28,462 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.5) internal successors, (66), 4 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:21:28,462 INFO L276 IsEmpty]: Start isEmpty. Operand 1033 states and 1624 transitions. [2022-01-10 07:21:28,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-01-10 07:21:28,465 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 07:21:28,466 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 07:21:28,479 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 07:21:28,673 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 07:21:28,673 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 07:21:28,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 07:21:28,673 INFO L85 PathProgramCache]: Analyzing trace with hash 1390210895, now seen corresponding path program 1 times [2022-01-10 07:21:28,674 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 07:21:28,674 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [329568038] [2022-01-10 07:21:28,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 07:21:28,674 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 07:21:28,674 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 07:21:28,687 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 07:21:28,689 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 07:21:28,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 07:21:28,788 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-10 07:21:28,789 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 07:21:28,906 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 07:21:28,907 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 07:21:28,907 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 07:21:28,907 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [329568038] [2022-01-10 07:21:28,907 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [329568038] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 07:21:28,907 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 07:21:28,907 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 07:21:28,907 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [60317174] [2022-01-10 07:21:28,907 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 07:21:28,907 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 07:21:28,908 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 07:21:28,908 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 07:21:28,908 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 07:21:28,908 INFO L87 Difference]: Start difference. First operand 1033 states and 1624 transitions. Second operand has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:21:28,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 07:21:28,965 INFO L93 Difference]: Finished difference Result 2685 states and 4328 transitions. [2022-01-10 07:21:28,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 07:21:28,966 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 70 [2022-01-10 07:21:28,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 07:21:28,971 INFO L225 Difference]: With dead ends: 2685 [2022-01-10 07:21:28,972 INFO L226 Difference]: Without dead ends: 1813 [2022-01-10 07:21:28,973 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 68 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 07:21:28,975 INFO L933 BasicCegarLoop]: 230 mSDtfsCounter, 121 mSDsluCounter, 190 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 121 SdHoareTripleChecker+Valid, 420 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 07:21:28,975 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [121 Valid, 420 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 07:21:28,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1813 states. [2022-01-10 07:21:29,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1813 to 1811. [2022-01-10 07:21:29,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1811 states, 1810 states have (on average 1.5950276243093922) internal successors, (2887), 1810 states have internal predecessors, (2887), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:21:29,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1811 states to 1811 states and 2887 transitions. [2022-01-10 07:21:29,041 INFO L78 Accepts]: Start accepts. Automaton has 1811 states and 2887 transitions. Word has length 70 [2022-01-10 07:21:29,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 07:21:29,041 INFO L470 AbstractCegarLoop]: Abstraction has 1811 states and 2887 transitions. [2022-01-10 07:21:29,041 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:21:29,041 INFO L276 IsEmpty]: Start isEmpty. Operand 1811 states and 2887 transitions. [2022-01-10 07:21:29,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-01-10 07:21:29,044 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 07:21:29,044 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 07:21:29,061 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2022-01-10 07:21:29,251 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 07:21:29,251 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 07:21:29,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 07:21:29,252 INFO L85 PathProgramCache]: Analyzing trace with hash -2006878416, now seen corresponding path program 1 times [2022-01-10 07:21:29,252 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 07:21:29,252 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [680392185] [2022-01-10 07:21:29,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 07:21:29,252 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 07:21:29,252 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 07:21:29,254 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 07:21:29,255 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 07:21:29,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 07:21:29,324 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 3 conjunts are in the unsatisfiable core [2022-01-10 07:21:29,325 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 07:21:29,449 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 07:21:29,449 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 07:21:29,450 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 07:21:29,450 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [680392185] [2022-01-10 07:21:29,450 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [680392185] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 07:21:29,450 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 07:21:29,450 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 07:21:29,450 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [781111043] [2022-01-10 07:21:29,450 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 07:21:29,450 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-10 07:21:29,450 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 07:21:29,451 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-10 07:21:29,451 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-10 07:21:29,451 INFO L87 Difference]: Start difference. First operand 1811 states and 2887 transitions. Second operand has 4 states, 4 states have (on average 18.0) 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 07:21:29,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 07:21:29,606 INFO L93 Difference]: Finished difference Result 5246 states and 8364 transitions. [2022-01-10 07:21:29,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-10 07:21:29,607 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 18.0) 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 72 [2022-01-10 07:21:29,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 07:21:29,617 INFO L225 Difference]: With dead ends: 5246 [2022-01-10 07:21:29,617 INFO L226 Difference]: Without dead ends: 3470 [2022-01-10 07:21:29,619 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 69 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 07:21:29,620 INFO L933 BasicCegarLoop]: 306 mSDtfsCounter, 449 mSDsluCounter, 197 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 449 SdHoareTripleChecker+Valid, 503 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 07:21:29,620 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [449 Valid, 503 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 07:21:29,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3470 states. [2022-01-10 07:21:29,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3470 to 3468. [2022-01-10 07:21:29,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3468 states, 3467 states have (on average 1.584655321603692) internal successors, (5494), 3467 states have internal predecessors, (5494), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:21:29,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3468 states to 3468 states and 5494 transitions. [2022-01-10 07:21:29,758 INFO L78 Accepts]: Start accepts. Automaton has 3468 states and 5494 transitions. Word has length 72 [2022-01-10 07:21:29,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 07:21:29,758 INFO L470 AbstractCegarLoop]: Abstraction has 3468 states and 5494 transitions. [2022-01-10 07:21:29,758 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.0) 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 07:21:29,758 INFO L276 IsEmpty]: Start isEmpty. Operand 3468 states and 5494 transitions. [2022-01-10 07:21:29,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-01-10 07:21:29,759 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 07:21:29,759 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 07:21:29,781 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 07:21:29,966 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 07:21:29,966 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 07:21:29,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 07:21:29,966 INFO L85 PathProgramCache]: Analyzing trace with hash 1715058406, now seen corresponding path program 1 times [2022-01-10 07:21:29,967 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 07:21:29,967 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [553269911] [2022-01-10 07:21:29,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 07:21:29,967 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 07:21:29,967 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 07:21:29,972 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 07:21:29,977 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 07:21:30,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 07:21:30,045 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-10 07:21:30,046 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 07:21:30,116 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 07:21:30,116 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 07:21:30,116 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 07:21:30,117 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [553269911] [2022-01-10 07:21:30,117 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [553269911] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 07:21:30,117 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 07:21:30,117 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 07:21:30,117 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1628947045] [2022-01-10 07:21:30,117 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 07:21:30,117 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 07:21:30,117 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 07:21:30,117 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 07:21:30,118 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 07:21:30,118 INFO L87 Difference]: Start difference. First operand 3468 states and 5494 transitions. Second operand has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 3 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 07:21:30,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 07:21:30,302 INFO L93 Difference]: Finished difference Result 10310 states and 16341 transitions. [2022-01-10 07:21:30,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 07:21:30,303 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 3 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 73 [2022-01-10 07:21:30,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 07:21:30,320 INFO L225 Difference]: With dead ends: 10310 [2022-01-10 07:21:30,320 INFO L226 Difference]: Without dead ends: 6898 [2022-01-10 07:21:30,325 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 71 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 07:21:30,325 INFO L933 BasicCegarLoop]: 404 mSDtfsCounter, 199 mSDsluCounter, 212 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 199 SdHoareTripleChecker+Valid, 616 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 07:21:30,326 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [199 Valid, 616 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 07:21:30,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6898 states. [2022-01-10 07:21:30,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6898 to 3474. [2022-01-10 07:21:30,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3474 states, 3473 states have (on average 1.5836452634609848) internal successors, (5500), 3473 states have internal predecessors, (5500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:21:30,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3474 states to 3474 states and 5500 transitions. [2022-01-10 07:21:30,487 INFO L78 Accepts]: Start accepts. Automaton has 3474 states and 5500 transitions. Word has length 73 [2022-01-10 07:21:30,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 07:21:30,487 INFO L470 AbstractCegarLoop]: Abstraction has 3474 states and 5500 transitions. [2022-01-10 07:21:30,487 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 3 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 07:21:30,488 INFO L276 IsEmpty]: Start isEmpty. Operand 3474 states and 5500 transitions. [2022-01-10 07:21:30,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-01-10 07:21:30,489 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 07:21:30,489 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 07:21:30,497 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 07:21:30,695 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 07:21:30,696 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 07:21:30,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 07:21:30,696 INFO L85 PathProgramCache]: Analyzing trace with hash -980932655, now seen corresponding path program 1 times [2022-01-10 07:21:30,696 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 07:21:30,696 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1852296719] [2022-01-10 07:21:30,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 07:21:30,697 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 07:21:30,697 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 07:21:30,708 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 07:21:30,738 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 07:21:30,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 07:21:30,791 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-10 07:21:30,792 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 07:21:30,865 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 07:21:30,865 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 07:21:30,866 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 07:21:30,866 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1852296719] [2022-01-10 07:21:30,866 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1852296719] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 07:21:30,866 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 07:21:30,866 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 07:21:30,866 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2094822478] [2022-01-10 07:21:30,866 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 07:21:30,866 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 07:21:30,866 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 07:21:30,867 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 07:21:30,867 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 07:21:30,867 INFO L87 Difference]: Start difference. First operand 3474 states and 5500 transitions. Second operand has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 3 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 07:21:31,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 07:21:31,067 INFO L93 Difference]: Finished difference Result 6448 states and 10330 transitions. [2022-01-10 07:21:31,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 07:21:31,067 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 3 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 73 [2022-01-10 07:21:31,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 07:21:31,080 INFO L225 Difference]: With dead ends: 6448 [2022-01-10 07:21:31,080 INFO L226 Difference]: Without dead ends: 4769 [2022-01-10 07:21:31,082 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 71 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 07:21:31,083 INFO L933 BasicCegarLoop]: 307 mSDtfsCounter, 122 mSDsluCounter, 187 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 122 SdHoareTripleChecker+Valid, 494 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 07:21:31,083 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [122 Valid, 494 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 07:21:31,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4769 states. [2022-01-10 07:21:31,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4769 to 4767. [2022-01-10 07:21:31,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4767 states, 4766 states have (on average 1.5864456567352077) internal successors, (7561), 4766 states have internal predecessors, (7561), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:21:31,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4767 states to 4767 states and 7561 transitions. [2022-01-10 07:21:31,269 INFO L78 Accepts]: Start accepts. Automaton has 4767 states and 7561 transitions. Word has length 73 [2022-01-10 07:21:31,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 07:21:31,269 INFO L470 AbstractCegarLoop]: Abstraction has 4767 states and 7561 transitions. [2022-01-10 07:21:31,269 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 3 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 07:21:31,269 INFO L276 IsEmpty]: Start isEmpty. Operand 4767 states and 7561 transitions. [2022-01-10 07:21:31,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-01-10 07:21:31,270 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 07:21:31,270 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 07:21:31,279 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2022-01-10 07:21:31,470 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 07:21:31,471 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 07:21:31,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 07:21:31,471 INFO L85 PathProgramCache]: Analyzing trace with hash 1966274989, now seen corresponding path program 1 times [2022-01-10 07:21:31,472 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 07:21:31,472 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2051071510] [2022-01-10 07:21:31,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 07:21:31,472 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 07:21:31,472 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 07:21:31,473 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 07:21:31,474 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 07:21:31,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 07:21:31,567 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-10 07:21:31,568 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 07:21:31,644 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 07:21:31,644 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 07:21:31,644 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 07:21:31,645 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2051071510] [2022-01-10 07:21:31,645 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2051071510] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 07:21:31,645 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 07:21:31,645 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 07:21:31,645 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1374348857] [2022-01-10 07:21:31,645 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 07:21:31,645 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 07:21:31,645 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 07:21:31,646 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 07:21:31,646 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 07:21:31,646 INFO L87 Difference]: Start difference. First operand 4767 states and 7561 transitions. Second operand has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 3 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 07:21:31,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 07:21:31,861 INFO L93 Difference]: Finished difference Result 10619 states and 17075 transitions. [2022-01-10 07:21:31,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 07:21:31,862 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 3 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 73 [2022-01-10 07:21:31,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 07:21:31,877 INFO L225 Difference]: With dead ends: 10619 [2022-01-10 07:21:31,878 INFO L226 Difference]: Without dead ends: 6230 [2022-01-10 07:21:31,881 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 71 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 07:21:31,882 INFO L933 BasicCegarLoop]: 220 mSDtfsCounter, 127 mSDsluCounter, 199 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 127 SdHoareTripleChecker+Valid, 419 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 07:21:31,882 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [127 Valid, 419 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 07:21:31,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6230 states. [2022-01-10 07:21:32,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6230 to 6116. [2022-01-10 07:21:32,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6116 states, 6115 states have (on average 1.587244480784955) internal successors, (9706), 6115 states have internal predecessors, (9706), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:21:32,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6116 states to 6116 states and 9706 transitions. [2022-01-10 07:21:32,110 INFO L78 Accepts]: Start accepts. Automaton has 6116 states and 9706 transitions. Word has length 73 [2022-01-10 07:21:32,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 07:21:32,111 INFO L470 AbstractCegarLoop]: Abstraction has 6116 states and 9706 transitions. [2022-01-10 07:21:32,111 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 3 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 07:21:32,111 INFO L276 IsEmpty]: Start isEmpty. Operand 6116 states and 9706 transitions. [2022-01-10 07:21:32,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-01-10 07:21:32,112 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 07:21:32,112 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 07:21:32,121 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (13)] Ended with exit code 0 [2022-01-10 07:21:32,319 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 07:21:32,319 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 07:21:32,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 07:21:32,319 INFO L85 PathProgramCache]: Analyzing trace with hash 1581889009, now seen corresponding path program 1 times [2022-01-10 07:21:32,320 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 07:21:32,320 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1938019530] [2022-01-10 07:21:32,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 07:21:32,320 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 07:21:32,320 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 07:21:32,321 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 07:21:32,323 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 07:21:32,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 07:21:32,411 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 3 conjunts are in the unsatisfiable core [2022-01-10 07:21:32,412 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 07:21:32,539 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 07:21:32,539 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 07:21:32,539 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 07:21:32,539 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1938019530] [2022-01-10 07:21:32,539 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1938019530] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 07:21:32,539 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 07:21:32,539 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 07:21:32,539 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [295097932] [2022-01-10 07:21:32,539 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 07:21:32,539 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-10 07:21:32,540 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 07:21:32,540 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-10 07:21:32,540 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-10 07:21:32,540 INFO L87 Difference]: Start difference. First operand 6116 states and 9706 transitions. Second operand has 4 states, 4 states have (on average 18.5) 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 07:21:32,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 07:21:32,766 INFO L93 Difference]: Finished difference Result 12194 states and 19359 transitions. [2022-01-10 07:21:32,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-10 07:21:32,767 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 18.5) 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 74 [2022-01-10 07:21:32,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 07:21:32,778 INFO L225 Difference]: With dead ends: 12194 [2022-01-10 07:21:32,778 INFO L226 Difference]: Without dead ends: 6110 [2022-01-10 07:21:32,783 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 71 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 07:21:32,784 INFO L933 BasicCegarLoop]: 251 mSDtfsCounter, 47 mSDsluCounter, 433 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 684 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 07:21:32,784 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [47 Valid, 684 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 07:21:32,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6110 states. [2022-01-10 07:21:33,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6110 to 6110. [2022-01-10 07:21:33,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6110 states, 6109 states have (on average 1.5868390898674087) internal successors, (9694), 6109 states have internal predecessors, (9694), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:21:33,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6110 states to 6110 states and 9694 transitions. [2022-01-10 07:21:33,023 INFO L78 Accepts]: Start accepts. Automaton has 6110 states and 9694 transitions. Word has length 74 [2022-01-10 07:21:33,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 07:21:33,023 INFO L470 AbstractCegarLoop]: Abstraction has 6110 states and 9694 transitions. [2022-01-10 07:21:33,024 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.5) 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 07:21:33,024 INFO L276 IsEmpty]: Start isEmpty. Operand 6110 states and 9694 transitions. [2022-01-10 07:21:33,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-01-10 07:21:33,025 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 07:21:33,026 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 07:21:33,032 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 07:21:33,232 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 07:21:33,232 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 07:21:33,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 07:21:33,233 INFO L85 PathProgramCache]: Analyzing trace with hash -1291886524, now seen corresponding path program 1 times [2022-01-10 07:21:33,233 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 07:21:33,233 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1031236378] [2022-01-10 07:21:33,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 07:21:33,233 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 07:21:33,233 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 07:21:33,234 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 07:21:33,235 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 07:21:33,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 07:21:33,348 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 3 conjunts are in the unsatisfiable core [2022-01-10 07:21:33,349 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 07:21:33,470 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 07:21:33,470 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 07:21:33,470 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 07:21:33,470 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1031236378] [2022-01-10 07:21:33,470 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1031236378] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 07:21:33,470 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 07:21:33,470 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 07:21:33,470 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2123711403] [2022-01-10 07:21:33,470 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 07:21:33,470 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-10 07:21:33,471 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 07:21:33,471 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-10 07:21:33,471 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-10 07:21:33,471 INFO L87 Difference]: Start difference. First operand 6110 states and 9694 transitions. Second operand has 4 states, 4 states have (on average 18.5) 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 07:21:33,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 07:21:33,866 INFO L93 Difference]: Finished difference Result 15111 states and 23952 transitions. [2022-01-10 07:21:33,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-10 07:21:33,866 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 18.5) 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 74 [2022-01-10 07:21:33,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 07:21:33,880 INFO L225 Difference]: With dead ends: 15111 [2022-01-10 07:21:33,880 INFO L226 Difference]: Without dead ends: 9038 [2022-01-10 07:21:33,886 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 71 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 07:21:33,886 INFO L933 BasicCegarLoop]: 219 mSDtfsCounter, 528 mSDsluCounter, 193 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 528 SdHoareTripleChecker+Valid, 412 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 07:21:33,886 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [528 Valid, 412 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 07:21:33,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9038 states. [2022-01-10 07:21:34,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9038 to 9035. [2022-01-10 07:21:34,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9035 states, 9034 states have (on average 1.564423289794111) internal successors, (14133), 9034 states have internal predecessors, (14133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:21:34,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9035 states to 9035 states and 14133 transitions. [2022-01-10 07:21:34,219 INFO L78 Accepts]: Start accepts. Automaton has 9035 states and 14133 transitions. Word has length 74 [2022-01-10 07:21:34,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 07:21:34,219 INFO L470 AbstractCegarLoop]: Abstraction has 9035 states and 14133 transitions. [2022-01-10 07:21:34,219 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.5) 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 07:21:34,220 INFO L276 IsEmpty]: Start isEmpty. Operand 9035 states and 14133 transitions. [2022-01-10 07:21:34,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2022-01-10 07:21:34,221 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 07:21:34,221 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, 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 07:21:34,230 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 07:21:34,428 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 07:21:34,428 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 07:21:34,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 07:21:34,429 INFO L85 PathProgramCache]: Analyzing trace with hash 1724175351, now seen corresponding path program 1 times [2022-01-10 07:21:34,429 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 07:21:34,429 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [202130941] [2022-01-10 07:21:34,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 07:21:34,429 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 07:21:34,429 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 07:21:34,430 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 07:21:34,432 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 07:21:34,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 07:21:34,511 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-10 07:21:34,512 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 07:21:34,828 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 07:21:34,829 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 07:21:34,829 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 07:21:34,829 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [202130941] [2022-01-10 07:21:34,829 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [202130941] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 07:21:34,829 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 07:21:34,829 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 07:21:34,829 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [246160526] [2022-01-10 07:21:34,829 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 07:21:34,829 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 07:21:34,829 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 07:21:34,830 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 07:21:34,830 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-10 07:21:34,830 INFO L87 Difference]: Start difference. First operand 9035 states and 14133 transitions. Second operand has 5 states, 5 states have (on average 15.6) internal successors, (78), 4 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 07:21:35,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 07:21:35,228 INFO L93 Difference]: Finished difference Result 12934 states and 20275 transitions. [2022-01-10 07:21:35,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-10 07:21:35,228 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 15.6) internal successors, (78), 4 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 07:21:35,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 07:21:35,243 INFO L225 Difference]: With dead ends: 12934 [2022-01-10 07:21:35,243 INFO L226 Difference]: Without dead ends: 9060 [2022-01-10 07:21:35,249 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 74 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 07:21:35,249 INFO L933 BasicCegarLoop]: 207 mSDtfsCounter, 82 mSDsluCounter, 226 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 433 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 12 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 07:21:35,250 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [82 Valid, 433 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 26 Invalid, 0 Unknown, 12 Unchecked, 0.1s Time] [2022-01-10 07:21:35,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9060 states. [2022-01-10 07:21:35,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9060 to 9044. [2022-01-10 07:21:35,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9044 states, 9043 states have (on average 1.5639721331416565) internal successors, (14143), 9043 states have internal predecessors, (14143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:21:35,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9044 states to 9044 states and 14143 transitions. [2022-01-10 07:21:35,669 INFO L78 Accepts]: Start accepts. Automaton has 9044 states and 14143 transitions. Word has length 78 [2022-01-10 07:21:35,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 07:21:35,669 INFO L470 AbstractCegarLoop]: Abstraction has 9044 states and 14143 transitions. [2022-01-10 07:21:35,669 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 15.6) internal successors, (78), 4 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 07:21:35,669 INFO L276 IsEmpty]: Start isEmpty. Operand 9044 states and 14143 transitions. [2022-01-10 07:21:35,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2022-01-10 07:21:35,671 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 07:21:35,671 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, 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 07:21:35,679 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2022-01-10 07:21:35,877 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 07:21:35,878 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 07:21:35,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 07:21:35,878 INFO L85 PathProgramCache]: Analyzing trace with hash 210785394, now seen corresponding path program 1 times [2022-01-10 07:21:35,878 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 07:21:35,878 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1865928169] [2022-01-10 07:21:35,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 07:21:35,879 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 07:21:35,879 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 07:21:35,880 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 07:21:35,881 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 07:21:35,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 07:21:35,951 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-10 07:21:35,952 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 07:21:36,090 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 07:21:36,090 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 07:21:36,090 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 07:21:36,090 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1865928169] [2022-01-10 07:21:36,090 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1865928169] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 07:21:36,090 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 07:21:36,090 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 07:21:36,091 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [746856298] [2022-01-10 07:21:36,091 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 07:21:36,091 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 07:21:36,091 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 07:21:36,091 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 07:21:36,091 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 07:21:36,091 INFO L87 Difference]: Start difference. First operand 9044 states and 14143 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 07:21:36,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 07:21:36,821 INFO L93 Difference]: Finished difference Result 24984 states and 39537 transitions. [2022-01-10 07:21:36,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 07:21:36,821 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 07:21:36,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 07:21:36,854 INFO L225 Difference]: With dead ends: 24984 [2022-01-10 07:21:36,855 INFO L226 Difference]: Without dead ends: 16486 [2022-01-10 07:21:36,869 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 07:21:36,870 INFO L933 BasicCegarLoop]: 216 mSDtfsCounter, 111 mSDsluCounter, 188 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 404 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 07:21:36,870 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [111 Valid, 404 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 07:21:36,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16486 states. [2022-01-10 07:21:37,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16486 to 16484. [2022-01-10 07:21:37,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16484 states, 16483 states have (on average 1.5700418613116545) internal successors, (25879), 16483 states have internal predecessors, (25879), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:21:37,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16484 states to 16484 states and 25879 transitions. [2022-01-10 07:21:37,605 INFO L78 Accepts]: Start accepts. Automaton has 16484 states and 25879 transitions. Word has length 78 [2022-01-10 07:21:37,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 07:21:37,605 INFO L470 AbstractCegarLoop]: Abstraction has 16484 states and 25879 transitions. [2022-01-10 07:21:37,605 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 07:21:37,606 INFO L276 IsEmpty]: Start isEmpty. Operand 16484 states and 25879 transitions. [2022-01-10 07:21:37,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-01-10 07:21:37,607 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 07:21:37,607 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, 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 07:21:37,627 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 07:21:37,814 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 07:21:37,814 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 07:21:37,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 07:21:37,815 INFO L85 PathProgramCache]: Analyzing trace with hash -1031417901, now seen corresponding path program 1 times [2022-01-10 07:21:37,815 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 07:21:37,815 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1553779067] [2022-01-10 07:21:37,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 07:21:37,815 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 07:21:37,815 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 07:21:37,816 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 07:21:37,817 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 07:21:37,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 07:21:37,890 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-10 07:21:37,891 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 07:21:38,020 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 07:21:38,020 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 07:21:38,020 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 07:21:38,020 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1553779067] [2022-01-10 07:21:38,020 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1553779067] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 07:21:38,020 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 07:21:38,020 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 07:21:38,021 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1343841688] [2022-01-10 07:21:38,021 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 07:21:38,021 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 07:21:38,021 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 07:21:38,021 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 07:21:38,021 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 07:21:38,021 INFO L87 Difference]: Start difference. First operand 16484 states and 25879 transitions. Second operand has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 3 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:21:39,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 07:21:39,141 INFO L93 Difference]: Finished difference Result 42280 states and 66602 transitions. [2022-01-10 07:21:39,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 07:21:39,141 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 3 states have internal predecessors, (80), 0 states have call successors, (0), 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 80 [2022-01-10 07:21:39,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 07:21:39,184 INFO L225 Difference]: With dead ends: 42280 [2022-01-10 07:21:39,184 INFO L226 Difference]: Without dead ends: 26342 [2022-01-10 07:21:39,208 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 78 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 07:21:39,209 INFO L933 BasicCegarLoop]: 375 mSDtfsCounter, 134 mSDsluCounter, 198 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 134 SdHoareTripleChecker+Valid, 573 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 07:21:39,209 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [134 Valid, 573 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 07:21:39,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26342 states. [2022-01-10 07:21:40,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26342 to 26340. [2022-01-10 07:21:40,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26340 states, 26339 states have (on average 1.5563233228292646) internal successors, (40992), 26339 states have internal predecessors, (40992), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:21:40,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26340 states to 26340 states and 40992 transitions. [2022-01-10 07:21:40,393 INFO L78 Accepts]: Start accepts. Automaton has 26340 states and 40992 transitions. Word has length 80 [2022-01-10 07:21:40,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 07:21:40,393 INFO L470 AbstractCegarLoop]: Abstraction has 26340 states and 40992 transitions. [2022-01-10 07:21:40,393 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 3 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:21:40,393 INFO L276 IsEmpty]: Start isEmpty. Operand 26340 states and 40992 transitions. [2022-01-10 07:21:40,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-01-10 07:21:40,395 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 07:21:40,395 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, 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 07:21:40,402 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 07:21:40,601 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 07:21:40,602 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 07:21:40,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 07:21:40,603 INFO L85 PathProgramCache]: Analyzing trace with hash 1799067421, now seen corresponding path program 1 times [2022-01-10 07:21:40,603 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 07:21:40,603 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [104768357] [2022-01-10 07:21:40,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 07:21:40,603 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 07:21:40,603 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 07:21:40,604 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 07:21:40,606 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 07:21:40,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 07:21:40,692 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-10 07:21:40,693 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 07:21:41,049 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 07:21:41,049 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 07:21:41,049 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 07:21:41,049 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [104768357] [2022-01-10 07:21:41,049 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [104768357] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 07:21:41,049 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 07:21:41,049 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 07:21:41,049 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1638461561] [2022-01-10 07:21:41,050 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 07:21:41,050 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 07:21:41,050 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 07:21:41,050 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 07:21:41,050 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-10 07:21:41,050 INFO L87 Difference]: Start difference. First operand 26340 states and 40992 transitions. Second operand has 5 states, 5 states have (on average 16.0) internal successors, (80), 4 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:21:42,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 07:21:42,284 INFO L93 Difference]: Finished difference Result 40126 states and 62524 transitions. [2022-01-10 07:21:42,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-10 07:21:42,285 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 16.0) internal successors, (80), 4 states have internal predecessors, (80), 0 states have call successors, (0), 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 80 [2022-01-10 07:21:42,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 07:21:42,327 INFO L225 Difference]: With dead ends: 40126 [2022-01-10 07:21:42,328 INFO L226 Difference]: Without dead ends: 26364 [2022-01-10 07:21:42,349 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 76 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 07:21:42,355 INFO L933 BasicCegarLoop]: 208 mSDtfsCounter, 64 mSDsluCounter, 436 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 644 SdHoareTripleChecker+Invalid, 93 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 40 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 07:21:42,355 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [64 Valid, 644 Invalid, 93 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 52 Invalid, 0 Unknown, 40 Unchecked, 0.1s Time] [2022-01-10 07:21:42,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26364 states. [2022-01-10 07:21:43,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26364 to 26364. [2022-01-10 07:21:43,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26364 states, 26363 states have (on average 1.5558168645450063) internal successors, (41016), 26363 states have internal predecessors, (41016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:21:43,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26364 states to 26364 states and 41016 transitions. [2022-01-10 07:21:43,512 INFO L78 Accepts]: Start accepts. Automaton has 26364 states and 41016 transitions. Word has length 80 [2022-01-10 07:21:43,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 07:21:43,512 INFO L470 AbstractCegarLoop]: Abstraction has 26364 states and 41016 transitions. [2022-01-10 07:21:43,512 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.0) internal successors, (80), 4 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:21:43,512 INFO L276 IsEmpty]: Start isEmpty. Operand 26364 states and 41016 transitions. [2022-01-10 07:21:43,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-01-10 07:21:43,514 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 07:21:43,514 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, 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 07:21:43,521 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 07:21:43,721 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 07:21:43,721 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 07:21:43,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 07:21:43,721 INFO L85 PathProgramCache]: Analyzing trace with hash 1514927522, now seen corresponding path program 1 times [2022-01-10 07:21:43,721 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 07:21:43,722 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [985925316] [2022-01-10 07:21:43,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 07:21:43,722 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 07:21:43,722 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 07:21:43,723 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 07:21:43,731 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 07:21:43,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 07:21:43,801 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 3 conjunts are in the unsatisfiable core [2022-01-10 07:21:43,802 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 07:21:43,931 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 07:21:43,931 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 07:21:43,931 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 07:21:43,932 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [985925316] [2022-01-10 07:21:43,932 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [985925316] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 07:21:43,932 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 07:21:43,932 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 07:21:43,932 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [916470495] [2022-01-10 07:21:43,932 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 07:21:43,932 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-10 07:21:43,932 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 07:21:43,932 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-10 07:21:43,933 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-10 07:21:43,933 INFO L87 Difference]: Start difference. First operand 26364 states and 41016 transitions. Second operand has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:21:45,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 07:21:45,033 INFO L93 Difference]: Finished difference Result 54119 states and 84026 transitions. [2022-01-10 07:21:45,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-10 07:21:45,034 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 0 states have call successors, (0), 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 80 [2022-01-10 07:21:45,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 07:21:45,084 INFO L225 Difference]: With dead ends: 54119 [2022-01-10 07:21:45,084 INFO L226 Difference]: Without dead ends: 27854 [2022-01-10 07:21:45,117 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 77 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 07:21:45,117 INFO L933 BasicCegarLoop]: 211 mSDtfsCounter, 505 mSDsluCounter, 192 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 505 SdHoareTripleChecker+Valid, 403 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 07:21:45,117 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [505 Valid, 403 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 07:21:45,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27854 states. [2022-01-10 07:21:46,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27854 to 26512. [2022-01-10 07:21:46,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26512 states, 26511 states have (on average 1.5526008072121007) internal successors, (41161), 26511 states have internal predecessors, (41161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:21:46,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26512 states to 26512 states and 41161 transitions. [2022-01-10 07:21:46,440 INFO L78 Accepts]: Start accepts. Automaton has 26512 states and 41161 transitions. Word has length 80 [2022-01-10 07:21:46,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 07:21:46,441 INFO L470 AbstractCegarLoop]: Abstraction has 26512 states and 41161 transitions. [2022-01-10 07:21:46,441 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:21:46,441 INFO L276 IsEmpty]: Start isEmpty. Operand 26512 states and 41161 transitions. [2022-01-10 07:21:46,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2022-01-10 07:21:46,443 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 07:21:46,443 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, 1, 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 07:21:46,452 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2022-01-10 07:21:46,650 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 07:21:46,650 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 07:21:46,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 07:21:46,651 INFO L85 PathProgramCache]: Analyzing trace with hash -632716888, now seen corresponding path program 1 times [2022-01-10 07:21:46,651 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 07:21:46,651 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1897816793] [2022-01-10 07:21:46,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 07:21:46,651 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 07:21:46,652 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 07:21:46,652 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 07:21:46,684 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 07:21:46,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 07:21:46,727 INFO L263 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-10 07:21:46,728 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 07:21:46,839 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 07:21:46,839 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 07:21:46,839 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 07:21:46,839 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1897816793] [2022-01-10 07:21:46,840 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1897816793] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 07:21:46,840 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 07:21:46,840 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 07:21:46,840 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1345684414] [2022-01-10 07:21:46,840 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 07:21:46,840 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 07:21:46,840 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 07:21:46,840 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 07:21:46,841 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 07:21:46,841 INFO L87 Difference]: Start difference. First operand 26512 states and 41161 transitions. Second operand has 3 states, 3 states have (on average 27.0) internal successors, (81), 3 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:21:48,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 07:21:48,494 INFO L93 Difference]: Finished difference Result 63592 states and 99419 transitions. [2022-01-10 07:21:48,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 07:21:48,494 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.0) internal successors, (81), 3 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 81 [2022-01-10 07:21:48,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 07:21:48,562 INFO L225 Difference]: With dead ends: 63592 [2022-01-10 07:21:48,562 INFO L226 Difference]: Without dead ends: 37950 [2022-01-10 07:21:48,592 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 79 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 07:21:48,592 INFO L933 BasicCegarLoop]: 231 mSDtfsCounter, 117 mSDsluCounter, 196 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 427 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 07:21:48,593 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [117 Valid, 427 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 07:21:48,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37950 states. [2022-01-10 07:21:50,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37950 to 36924. [2022-01-10 07:21:50,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36924 states, 36923 states have (on average 1.5424802968339517) internal successors, (56953), 36923 states have internal predecessors, (56953), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:21:50,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36924 states to 36924 states and 56953 transitions. [2022-01-10 07:21:50,545 INFO L78 Accepts]: Start accepts. Automaton has 36924 states and 56953 transitions. Word has length 81 [2022-01-10 07:21:50,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 07:21:50,545 INFO L470 AbstractCegarLoop]: Abstraction has 36924 states and 56953 transitions. [2022-01-10 07:21:50,545 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.0) internal successors, (81), 3 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:21:50,545 INFO L276 IsEmpty]: Start isEmpty. Operand 36924 states and 56953 transitions. [2022-01-10 07:21:50,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2022-01-10 07:21:50,547 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 07:21:50,547 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, 1, 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 07:21:50,554 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 07:21:50,754 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 07:21:50,754 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 07:21:50,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 07:21:50,755 INFO L85 PathProgramCache]: Analyzing trace with hash 2052010958, now seen corresponding path program 1 times [2022-01-10 07:21:50,755 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 07:21:50,755 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [561552180] [2022-01-10 07:21:50,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 07:21:50,756 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 07:21:50,756 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 07:21:50,760 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 07:21:50,761 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 07:21:50,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 07:21:50,830 INFO L263 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 3 conjunts are in the unsatisfiable core [2022-01-10 07:21:50,831 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 07:21:50,948 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 07:21:50,949 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 07:21:50,949 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 07:21:50,949 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [561552180] [2022-01-10 07:21:50,949 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [561552180] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 07:21:50,949 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 07:21:50,949 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 07:21:50,949 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [9102550] [2022-01-10 07:21:50,949 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 07:21:50,950 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-10 07:21:50,950 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 07:21:50,950 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-10 07:21:50,950 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-10 07:21:50,950 INFO L87 Difference]: Start difference. First operand 36924 states and 56953 transitions. Second operand has 4 states, 4 states have (on average 20.25) internal successors, (81), 4 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:21:53,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 07:21:53,653 INFO L93 Difference]: Finished difference Result 93855 states and 144747 transitions. [2022-01-10 07:21:53,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-10 07:21:53,653 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 20.25) internal successors, (81), 4 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 81 [2022-01-10 07:21:53,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 07:21:53,753 INFO L225 Difference]: With dead ends: 93855 [2022-01-10 07:21:53,753 INFO L226 Difference]: Without dead ends: 57085 [2022-01-10 07:21:53,801 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 78 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 07:21:53,811 INFO L933 BasicCegarLoop]: 231 mSDtfsCounter, 557 mSDsluCounter, 193 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 557 SdHoareTripleChecker+Valid, 424 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 07:21:53,811 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [557 Valid, 424 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 07:21:53,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57085 states. [2022-01-10 07:21:56,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57085 to 57083. [2022-01-10 07:21:56,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57083 states, 57082 states have (on average 1.5254370905013839) internal successors, (87075), 57082 states have internal predecessors, (87075), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:21:56,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57083 states to 57083 states and 87075 transitions. [2022-01-10 07:21:56,876 INFO L78 Accepts]: Start accepts. Automaton has 57083 states and 87075 transitions. Word has length 81 [2022-01-10 07:21:56,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 07:21:56,877 INFO L470 AbstractCegarLoop]: Abstraction has 57083 states and 87075 transitions. [2022-01-10 07:21:56,877 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.25) internal successors, (81), 4 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:21:56,877 INFO L276 IsEmpty]: Start isEmpty. Operand 57083 states and 87075 transitions. [2022-01-10 07:21:56,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2022-01-10 07:21:56,880 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 07:21:56,880 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, 1, 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 07:21:56,887 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 07:21:57,086 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 07:21:57,087 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 07:21:57,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 07:21:57,087 INFO L85 PathProgramCache]: Analyzing trace with hash -1355989641, now seen corresponding path program 1 times [2022-01-10 07:21:57,087 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 07:21:57,087 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1918920041] [2022-01-10 07:21:57,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 07:21:57,088 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 07:21:57,088 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 07:21:57,089 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 07:21:57,090 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 07:21:57,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 07:21:57,156 INFO L263 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 3 conjunts are in the unsatisfiable core [2022-01-10 07:21:57,168 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 07:21:57,311 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 07:21:57,312 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 07:21:57,312 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 07:21:57,312 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1918920041] [2022-01-10 07:21:57,312 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1918920041] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 07:21:57,312 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 07:21:57,312 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 07:21:57,312 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [424120732] [2022-01-10 07:21:57,312 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 07:21:57,313 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-10 07:21:57,313 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 07:21:57,324 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-10 07:21:57,324 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-10 07:21:57,324 INFO L87 Difference]: Start difference. First operand 57083 states and 87075 transitions. Second operand has 4 states, 4 states have (on average 20.25) internal successors, (81), 4 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:21:59,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 07:21:59,813 INFO L93 Difference]: Finished difference Result 93503 states and 142575 transitions. [2022-01-10 07:21:59,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-10 07:21:59,815 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 20.25) internal successors, (81), 4 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 81 [2022-01-10 07:21:59,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 07:21:59,889 INFO L225 Difference]: With dead ends: 93503 [2022-01-10 07:21:59,890 INFO L226 Difference]: Without dead ends: 48796 [2022-01-10 07:21:59,926 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 78 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 07:21:59,927 INFO L933 BasicCegarLoop]: 248 mSDtfsCounter, 47 mSDsluCounter, 422 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 670 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 07:21:59,927 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [47 Valid, 670 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 07:21:59,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48796 states. [2022-01-10 07:22:01,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48796 to 48796. [2022-01-10 07:22:02,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48796 states, 48795 states have (on average 1.5211189671072856) internal successors, (74223), 48795 states have internal predecessors, (74223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:22:02,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48796 states to 48796 states and 74223 transitions. [2022-01-10 07:22:02,137 INFO L78 Accepts]: Start accepts. Automaton has 48796 states and 74223 transitions. Word has length 81 [2022-01-10 07:22:02,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 07:22:02,137 INFO L470 AbstractCegarLoop]: Abstraction has 48796 states and 74223 transitions. [2022-01-10 07:22:02,137 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.25) internal successors, (81), 4 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:22:02,137 INFO L276 IsEmpty]: Start isEmpty. Operand 48796 states and 74223 transitions. [2022-01-10 07:22:02,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2022-01-10 07:22:02,140 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 07:22:02,140 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, 1, 1, 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 07:22:02,146 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 07:22:02,346 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 07:22:02,346 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 07:22:02,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 07:22:02,347 INFO L85 PathProgramCache]: Analyzing trace with hash -684870721, now seen corresponding path program 1 times [2022-01-10 07:22:02,347 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 07:22:02,347 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [146564162] [2022-01-10 07:22:02,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 07:22:02,347 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 07:22:02,347 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 07:22:02,349 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 07:22:02,349 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 07:22:02,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 07:22:02,454 INFO L263 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-10 07:22:02,455 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 07:22:02,583 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 07:22:02,583 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 07:22:02,583 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 07:22:02,583 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [146564162] [2022-01-10 07:22:02,583 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [146564162] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 07:22:02,583 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 07:22:02,583 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 07:22:02,583 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2056830725] [2022-01-10 07:22:02,583 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 07:22:02,584 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 07:22:02,584 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 07:22:02,584 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 07:22:02,584 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 07:22:02,584 INFO L87 Difference]: Start difference. First operand 48796 states and 74223 transitions. Second operand has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:22:05,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 07:22:05,436 INFO L93 Difference]: Finished difference Result 93305 states and 143064 transitions. [2022-01-10 07:22:05,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 07:22:05,437 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 82 [2022-01-10 07:22:05,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 07:22:05,557 INFO L225 Difference]: With dead ends: 93305 [2022-01-10 07:22:05,557 INFO L226 Difference]: Without dead ends: 61951 [2022-01-10 07:22:05,591 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 80 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 07:22:05,595 INFO L933 BasicCegarLoop]: 278 mSDtfsCounter, 112 mSDsluCounter, 181 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 112 SdHoareTripleChecker+Valid, 459 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 07:22:05,595 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [112 Valid, 459 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 07:22:05,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61951 states. [2022-01-10 07:22:08,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61951 to 61949. [2022-01-10 07:22:08,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61949 states, 61948 states have (on average 1.5227125976625557) internal successors, (94329), 61948 states have internal predecessors, (94329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:22:08,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61949 states to 61949 states and 94329 transitions. [2022-01-10 07:22:08,657 INFO L78 Accepts]: Start accepts. Automaton has 61949 states and 94329 transitions. Word has length 82 [2022-01-10 07:22:08,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 07:22:08,657 INFO L470 AbstractCegarLoop]: Abstraction has 61949 states and 94329 transitions. [2022-01-10 07:22:08,658 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:22:08,658 INFO L276 IsEmpty]: Start isEmpty. Operand 61949 states and 94329 transitions. [2022-01-10 07:22:08,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2022-01-10 07:22:08,660 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 07:22:08,660 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, 1, 1, 1, 1, 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 07:22:08,667 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (24)] Forceful destruction successful, exit code 0 [2022-01-10 07:22:08,865 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 07:22:08,865 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 07:22:08,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 07:22:08,866 INFO L85 PathProgramCache]: Analyzing trace with hash -1765354342, now seen corresponding path program 1 times [2022-01-10 07:22:08,866 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 07:22:08,866 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1888847395] [2022-01-10 07:22:08,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 07:22:08,866 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 07:22:08,866 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 07:22:08,867 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 07:22:08,869 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2022-01-10 07:22:08,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 07:22:08,936 INFO L263 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 3 conjunts are in the unsatisfiable core [2022-01-10 07:22:08,937 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 07:22:09,016 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 07:22:09,017 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 07:22:09,017 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 07:22:09,017 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1888847395] [2022-01-10 07:22:09,017 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1888847395] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 07:22:09,017 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 07:22:09,017 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 07:22:09,017 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1767515784] [2022-01-10 07:22:09,017 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 07:22:09,017 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-10 07:22:09,017 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 07:22:09,018 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-10 07:22:09,018 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-10 07:22:09,018 INFO L87 Difference]: Start difference. First operand 61949 states and 94329 transitions. Second operand has 4 states, 4 states have (on average 21.0) internal successors, (84), 4 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:22:11,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 07:22:11,484 INFO L93 Difference]: Finished difference Result 89978 states and 136849 transitions. [2022-01-10 07:22:11,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-10 07:22:11,484 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 21.0) internal successors, (84), 4 states have internal predecessors, (84), 0 states have call successors, (0), 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 84 [2022-01-10 07:22:11,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 07:22:11,593 INFO L225 Difference]: With dead ends: 89978 [2022-01-10 07:22:11,593 INFO L226 Difference]: Without dead ends: 55376 [2022-01-10 07:22:11,635 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 81 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 07:22:11,636 INFO L933 BasicCegarLoop]: 232 mSDtfsCounter, 23 mSDsluCounter, 418 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 650 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 07:22:11,636 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 650 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 07:22:11,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55376 states. [2022-01-10 07:22:14,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55376 to 55376. [2022-01-10 07:22:14,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55376 states, 55375 states have (on average 1.520920993227991) internal successors, (84221), 55375 states have internal predecessors, (84221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:22:14,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55376 states to 55376 states and 84221 transitions. [2022-01-10 07:22:14,232 INFO L78 Accepts]: Start accepts. Automaton has 55376 states and 84221 transitions. Word has length 84 [2022-01-10 07:22:14,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 07:22:14,233 INFO L470 AbstractCegarLoop]: Abstraction has 55376 states and 84221 transitions. [2022-01-10 07:22:14,233 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.0) internal successors, (84), 4 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:22:14,233 INFO L276 IsEmpty]: Start isEmpty. Operand 55376 states and 84221 transitions. [2022-01-10 07:22:14,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2022-01-10 07:22:14,234 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 07:22:14,235 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, 1, 1, 1, 1, 1, 1, 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 07:22:14,243 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (25)] Forceful destruction successful, exit code 0 [2022-01-10 07:22:14,441 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 07:22:14,441 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 07:22:14,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 07:22:14,442 INFO L85 PathProgramCache]: Analyzing trace with hash -726599347, now seen corresponding path program 1 times [2022-01-10 07:22:14,442 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 07:22:14,442 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1822196446] [2022-01-10 07:22:14,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 07:22:14,442 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 07:22:14,442 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 07:22:14,443 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 07:22:14,445 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2022-01-10 07:22:14,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 07:22:14,517 INFO L263 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-10 07:22:14,518 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 07:22:14,939 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 07:22:14,939 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 07:22:14,939 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 07:22:14,939 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1822196446] [2022-01-10 07:22:14,939 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1822196446] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 07:22:14,940 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 07:22:14,940 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 07:22:14,940 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [607377944] [2022-01-10 07:22:14,940 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 07:22:14,940 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 07:22:14,940 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 07:22:14,940 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 07:22:14,940 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-10 07:22:14,940 INFO L87 Difference]: Start difference. First operand 55376 states and 84221 transitions. Second operand has 5 states, 5 states have (on average 17.2) internal successors, (86), 4 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:22:17,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 07:22:17,575 INFO L93 Difference]: Finished difference Result 79729 states and 121384 transitions. [2022-01-10 07:22:17,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-10 07:22:17,576 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 17.2) internal successors, (86), 4 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 86 [2022-01-10 07:22:17,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 07:22:17,684 INFO L225 Difference]: With dead ends: 79729 [2022-01-10 07:22:17,684 INFO L226 Difference]: Without dead ends: 55407 [2022-01-10 07:22:17,712 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 82 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 07:22:17,714 INFO L933 BasicCegarLoop]: 205 mSDtfsCounter, 73 mSDsluCounter, 320 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 525 SdHoareTripleChecker+Invalid, 64 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 17 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 07:22:17,714 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [73 Valid, 525 Invalid, 64 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 46 Invalid, 0 Unknown, 17 Unchecked, 0.0s Time] [2022-01-10 07:22:17,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55407 states. [2022-01-10 07:22:20,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55407 to 55387. [2022-01-10 07:22:20,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55387 states, 55386 states have (on average 1.5208717004297114) internal successors, (84235), 55386 states have internal predecessors, (84235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:22:20,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55387 states to 55387 states and 84235 transitions. [2022-01-10 07:22:20,392 INFO L78 Accepts]: Start accepts. Automaton has 55387 states and 84235 transitions. Word has length 86 [2022-01-10 07:22:20,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 07:22:20,392 INFO L470 AbstractCegarLoop]: Abstraction has 55387 states and 84235 transitions. [2022-01-10 07:22:20,392 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 17.2) internal successors, (86), 4 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:22:20,392 INFO L276 IsEmpty]: Start isEmpty. Operand 55387 states and 84235 transitions. [2022-01-10 07:22:20,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2022-01-10 07:22:20,394 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 07:22:20,394 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, 1, 1, 1, 1, 1, 1, 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 07:22:20,402 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (26)] Ended with exit code 0 [2022-01-10 07:22:20,600 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 07:22:20,600 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 07:22:20,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 07:22:20,600 INFO L85 PathProgramCache]: Analyzing trace with hash 237891400, now seen corresponding path program 1 times [2022-01-10 07:22:20,601 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 07:22:20,601 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [524017023] [2022-01-10 07:22:20,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 07:22:20,601 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 07:22:20,601 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 07:22:20,602 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 07:22:20,603 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2022-01-10 07:22:20,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 07:22:20,675 INFO L263 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-10 07:22:20,677 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 07:22:20,982 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 07:22:20,982 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 07:22:20,982 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 07:22:20,982 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [524017023] [2022-01-10 07:22:20,983 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [524017023] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 07:22:20,983 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 07:22:20,983 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-10 07:22:20,983 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1548183813] [2022-01-10 07:22:20,983 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 07:22:20,983 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 07:22:20,983 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 07:22:20,983 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 07:22:20,983 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-01-10 07:22:20,983 INFO L87 Difference]: Start difference. First operand 55387 states and 84235 transitions. Second operand has 5 states, 5 states have (on average 17.2) internal successors, (86), 5 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:22:28,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 07:22:28,651 INFO L93 Difference]: Finished difference Result 228867 states and 352103 transitions. [2022-01-10 07:22:28,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-10 07:22:28,652 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 17.2) internal successors, (86), 5 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 86 [2022-01-10 07:22:28,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 07:22:29,192 INFO L225 Difference]: With dead ends: 228867 [2022-01-10 07:22:29,192 INFO L226 Difference]: Without dead ends: 174721 [2022-01-10 07:22:29,275 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-01-10 07:22:29,276 INFO L933 BasicCegarLoop]: 221 mSDtfsCounter, 452 mSDsluCounter, 921 mSDsCounter, 0 mSdLazyCounter, 90 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 452 SdHoareTripleChecker+Valid, 1142 SdHoareTripleChecker+Invalid, 94 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 90 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 07:22:29,277 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [452 Valid, 1142 Invalid, 94 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 90 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-10 07:22:29,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174721 states. [2022-01-10 07:22:36,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174721 to 144967. [2022-01-10 07:22:36,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144967 states, 144966 states have (on average 1.5121131851606584) internal successors, (219205), 144966 states have internal predecessors, (219205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:22:37,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144967 states to 144967 states and 219205 transitions. [2022-01-10 07:22:37,206 INFO L78 Accepts]: Start accepts. Automaton has 144967 states and 219205 transitions. Word has length 86 [2022-01-10 07:22:37,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 07:22:37,206 INFO L470 AbstractCegarLoop]: Abstraction has 144967 states and 219205 transitions. [2022-01-10 07:22:37,206 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 17.2) internal successors, (86), 5 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:22:37,206 INFO L276 IsEmpty]: Start isEmpty. Operand 144967 states and 219205 transitions. [2022-01-10 07:22:37,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2022-01-10 07:22:37,208 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 07:22:37,209 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, 1, 1, 1, 1, 1, 1, 1, 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 07:22:37,215 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (27)] Forceful destruction successful, exit code 0 [2022-01-10 07:22:37,415 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 07:22:37,415 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 07:22:37,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 07:22:37,416 INFO L85 PathProgramCache]: Analyzing trace with hash -1277805378, now seen corresponding path program 1 times [2022-01-10 07:22:37,416 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 07:22:37,416 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1434310241] [2022-01-10 07:22:37,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 07:22:37,417 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 07:22:37,417 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 07:22:37,419 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 07:22:37,419 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (28)] Waiting until timeout for monitored process [2022-01-10 07:22:37,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 07:22:37,499 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 3 conjunts are in the unsatisfiable core [2022-01-10 07:22:37,500 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 07:22:37,706 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 07:22:37,706 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 07:22:37,706 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 07:22:37,706 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1434310241] [2022-01-10 07:22:37,706 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1434310241] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 07:22:37,707 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 07:22:37,707 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 07:22:37,707 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1726110680] [2022-01-10 07:22:37,707 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 07:22:37,707 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-10 07:22:37,707 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 07:22:37,707 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-10 07:22:37,707 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-01-10 07:22:37,707 INFO L87 Difference]: Start difference. First operand 144967 states and 219205 transitions. Second operand has 4 states, 4 states have (on average 21.75) internal successors, (87), 4 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)