/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/verifythis/elimination_max_rec_onepoint.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-a10ec3b [2022-01-10 06:40:52,830 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-10 06:40:52,831 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-10 06:40:52,872 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-01-10 06:40:52,873 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-01-10 06:40:52,876 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-01-10 06:40:52,879 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-01-10 06:40:52,885 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-01-10 06:40:52,886 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-01-10 06:40:52,887 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-01-10 06:40:52,887 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-01-10 06:40:52,888 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-01-10 06:40:52,888 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-01-10 06:40:52,889 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-01-10 06:40:52,890 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-01-10 06:40:52,890 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-01-10 06:40:52,891 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-01-10 06:40:52,891 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-01-10 06:40:52,892 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-01-10 06:40:52,894 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-01-10 06:40:52,895 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-01-10 06:40:52,898 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-01-10 06:40:52,898 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-01-10 06:40:52,899 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-01-10 06:40:52,900 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-01-10 06:40:52,905 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-10 06:40:52,906 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-10 06:40:52,906 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-10 06:40:52,907 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/BvToInt/svcomp-Reach-64bit-Automizer_Bitvector.epf [2022-01-10 06:40:52,921 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-10 06:40:52,921 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-10 06:40:52,921 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-01-10 06:40:52,921 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-01-10 06:40:52,922 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-01-10 06:40:52,922 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-01-10 06:40:52,922 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-01-10 06:40:52,922 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-01-10 06:40:52,923 INFO L138 SettingsManager]: * Use SBE=true [2022-01-10 06:40:52,923 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-10 06:40:52,923 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-10 06:40:52,923 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-10 06:40:52,923 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-10 06:40:52,923 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-10 06:40:52,923 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-10 06:40:52,923 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-01-10 06:40:52,924 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-01-10 06:40:52,924 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-01-10 06:40:52,924 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-10 06:40:52,924 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-10 06:40:52,924 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-10 06:40:52,924 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-10 06:40:52,924 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-10 06:40:52,924 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-10 06:40:52,925 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-10 06:40:52,925 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-01-10 06:40:52,925 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-01-10 06:40:52,925 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2022-01-10 06:40:52,925 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-01-10 06:40:52,925 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-01-10 06:40:52,925 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-01-10 06:40:52,925 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-01-10 06:40:52,926 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-01-10 06:40:52,926 INFO L138 SettingsManager]: * Logic for external solver=AUFBV WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-10 06:40:53,123 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-10 06:40:53,140 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-10 06:40:53,142 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-10 06:40:53,142 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-10 06:40:53,145 INFO L275 PluginConnector]: CDTParser initialized [2022-01-10 06:40:53,146 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/verifythis/elimination_max_rec_onepoint.c [2022-01-10 06:40:53,203 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0909e600b/594382f93b7d4122ad50e394f1656ba7/FLAG156843d90 [2022-01-10 06:40:53,585 INFO L306 CDTParser]: Found 1 translation units. [2022-01-10 06:40:53,586 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/verifythis/elimination_max_rec_onepoint.c [2022-01-10 06:40:53,590 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0909e600b/594382f93b7d4122ad50e394f1656ba7/FLAG156843d90 [2022-01-10 06:40:53,598 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0909e600b/594382f93b7d4122ad50e394f1656ba7 [2022-01-10 06:40:53,600 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-10 06:40:53,601 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-01-10 06:40:53,602 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-10 06:40:53,602 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-10 06:40:53,604 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-10 06:40:53,604 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 06:40:53" (1/1) ... [2022-01-10 06:40:53,605 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@fb56756 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:40:53, skipping insertion in model container [2022-01-10 06:40:53,605 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 06:40:53" (1/1) ... [2022-01-10 06:40:53,609 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-10 06:40:53,617 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-10 06:40:53,707 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/verifythis/elimination_max_rec_onepoint.c[502,515] [2022-01-10 06:40:53,744 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-10 06:40:53,751 INFO L203 MainTranslator]: Completed pre-run [2022-01-10 06:40:53,758 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/verifythis/elimination_max_rec_onepoint.c[502,515] [2022-01-10 06:40:53,768 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-10 06:40:53,781 INFO L208 MainTranslator]: Completed translation [2022-01-10 06:40:53,781 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:40:53 WrapperNode [2022-01-10 06:40:53,781 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-10 06:40:53,782 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-01-10 06:40:53,782 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-01-10 06:40:53,782 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-01-10 06:40:53,789 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:40:53" (1/1) ... [2022-01-10 06:40:53,804 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:40:53" (1/1) ... [2022-01-10 06:40:53,814 INFO L137 Inliner]: procedures = 21, calls = 24, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 36 [2022-01-10 06:40:53,815 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-01-10 06:40:53,815 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-10 06:40:53,815 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-10 06:40:53,815 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-10 06:40:53,820 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:40:53" (1/1) ... [2022-01-10 06:40:53,820 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:40:53" (1/1) ... [2022-01-10 06:40:53,822 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:40:53" (1/1) ... [2022-01-10 06:40:53,822 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:40:53" (1/1) ... [2022-01-10 06:40:53,826 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:40:53" (1/1) ... [2022-01-10 06:40:53,828 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:40:53" (1/1) ... [2022-01-10 06:40:53,829 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:40:53" (1/1) ... [2022-01-10 06:40:53,831 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-10 06:40:53,831 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-10 06:40:53,831 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-10 06:40:53,831 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-10 06:40:53,832 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:40:53" (1/1) ... [2022-01-10 06:40:53,839 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-10 06:40:53,848 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 06:40:53,857 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-01-10 06:40:53,869 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-01-10 06:40:53,882 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-10 06:40:53,882 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-01-10 06:40:53,882 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-01-10 06:40:53,882 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-01-10 06:40:53,882 INFO L130 BoogieDeclarations]: Found specification of procedure check [2022-01-10 06:40:53,883 INFO L138 BoogieDeclarations]: Found implementation of procedure check [2022-01-10 06:40:53,883 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-01-10 06:40:53,883 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2022-01-10 06:40:53,883 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-10 06:40:53,883 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-10 06:40:53,884 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-01-10 06:40:53,884 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-01-10 06:40:53,884 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-01-10 06:40:53,966 INFO L234 CfgBuilder]: Building ICFG [2022-01-10 06:40:53,968 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-10 06:40:54,190 INFO L275 CfgBuilder]: Performing block encoding [2022-01-10 06:40:54,195 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-10 06:40:54,195 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2022-01-10 06:40:54,202 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 06:40:54 BoogieIcfgContainer [2022-01-10 06:40:54,202 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-10 06:40:54,205 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-10 06:40:54,205 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-10 06:40:54,207 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-10 06:40:54,209 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 10.01 06:40:53" (1/3) ... [2022-01-10 06:40:54,210 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@76dd7670 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 06:40:54, skipping insertion in model container [2022-01-10 06:40:54,210 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:40:53" (2/3) ... [2022-01-10 06:40:54,210 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@76dd7670 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 06:40:54, skipping insertion in model container [2022-01-10 06:40:54,210 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 06:40:54" (3/3) ... [2022-01-10 06:40:54,212 INFO L111 eAbstractionObserver]: Analyzing ICFG elimination_max_rec_onepoint.c [2022-01-10 06:40:54,216 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-01-10 06:40:54,216 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-10 06:40:54,271 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-10 06:40:54,277 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2022-01-10 06:40:54,277 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-01-10 06:40:54,298 INFO L276 IsEmpty]: Start isEmpty. Operand has 37 states, 24 states have (on average 1.25) internal successors, (30), 25 states have internal predecessors, (30), 8 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-01-10 06:40:54,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-10 06:40:54,301 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:40:54,302 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:40:54,303 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:40:54,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:40:54,307 INFO L85 PathProgramCache]: Analyzing trace with hash 1093965153, now seen corresponding path program 1 times [2022-01-10 06:40:54,315 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:40:54,315 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [9181928] [2022-01-10 06:40:54,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:40:54,316 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:40:54,316 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:40:54,318 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:40:54,320 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2022-01-10 06:40:54,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:40:54,379 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 1 conjunts are in the unsatisfiable core [2022-01-10 06:40:54,382 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:40:54,444 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-10 06:40:54,444 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:40:54,445 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:40:54,445 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [9181928] [2022-01-10 06:40:54,446 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [9181928] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:40:54,446 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:40:54,446 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-01-10 06:40:54,448 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [927213209] [2022-01-10 06:40:54,448 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:40:54,451 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-01-10 06:40:54,452 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:40:54,469 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-01-10 06:40:54,469 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-01-10 06:40:54,471 INFO L87 Difference]: Start difference. First operand has 37 states, 24 states have (on average 1.25) internal successors, (30), 25 states have internal predecessors, (30), 8 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) Second operand has 2 states, 2 states have (on average 8.0) internal successors, (16), 2 states have internal predecessors, (16), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-10 06:40:54,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:40:54,484 INFO L93 Difference]: Finished difference Result 71 states and 96 transitions. [2022-01-10 06:40:54,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-01-10 06:40:54,486 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 8.0) internal successors, (16), 2 states have internal predecessors, (16), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 23 [2022-01-10 06:40:54,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:40:54,490 INFO L225 Difference]: With dead ends: 71 [2022-01-10 06:40:54,490 INFO L226 Difference]: Without dead ends: 33 [2022-01-10 06:40:54,492 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-01-10 06:40:54,494 INFO L933 BasicCegarLoop]: 44 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 06:40:54,495 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 06:40:54,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2022-01-10 06:40:54,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2022-01-10 06:40:54,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 21 states have (on average 1.1904761904761905) internal successors, (25), 22 states have internal predecessors, (25), 8 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-01-10 06:40:54,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 40 transitions. [2022-01-10 06:40:54,523 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 40 transitions. Word has length 23 [2022-01-10 06:40:54,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:40:54,524 INFO L470 AbstractCegarLoop]: Abstraction has 33 states and 40 transitions. [2022-01-10 06:40:54,524 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 8.0) internal successors, (16), 2 states have internal predecessors, (16), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-10 06:40:54,524 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 40 transitions. [2022-01-10 06:40:54,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-10 06:40:54,525 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:40:54,525 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:40:54,532 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2022-01-10 06:40:54,727 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 06:40:54,728 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:40:54,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:40:54,728 INFO L85 PathProgramCache]: Analyzing trace with hash -1181784603, now seen corresponding path program 1 times [2022-01-10 06:40:54,729 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:40:54,729 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1366712970] [2022-01-10 06:40:54,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:40:54,729 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:40:54,729 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:40:54,732 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:40:54,733 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2022-01-10 06:40:54,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:40:54,794 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 9 conjunts are in the unsatisfiable core [2022-01-10 06:40:54,796 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:40:55,003 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-10 06:40:55,003 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:40:55,003 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:40:55,004 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1366712970] [2022-01-10 06:40:55,004 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1366712970] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:40:55,004 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:40:55,004 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-01-10 06:40:55,005 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1612114940] [2022-01-10 06:40:55,008 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:40:55,009 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-01-10 06:40:55,010 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:40:55,010 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-01-10 06:40:55,011 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-01-10 06:40:55,011 INFO L87 Difference]: Start difference. First operand 33 states and 40 transitions. Second operand has 7 states, 7 states have (on average 2.0) internal successors, (14), 6 states have internal predecessors, (14), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-10 06:40:55,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:40:55,093 INFO L93 Difference]: Finished difference Result 60 states and 72 transitions. [2022-01-10 06:40:55,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-10 06:40:55,093 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.0) internal successors, (14), 6 states have internal predecessors, (14), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 23 [2022-01-10 06:40:55,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:40:55,096 INFO L225 Difference]: With dead ends: 60 [2022-01-10 06:40:55,097 INFO L226 Difference]: Without dead ends: 34 [2022-01-10 06:40:55,098 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2022-01-10 06:40:55,101 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 4 mSDsluCounter, 124 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 158 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 6 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 06:40:55,102 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5 Valid, 158 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 24 Invalid, 0 Unknown, 6 Unchecked, 0.0s Time] [2022-01-10 06:40:55,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2022-01-10 06:40:55,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2022-01-10 06:40:55,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 22 states have (on average 1.1818181818181819) internal successors, (26), 23 states have internal predecessors, (26), 8 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-01-10 06:40:55,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 41 transitions. [2022-01-10 06:40:55,111 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 41 transitions. Word has length 23 [2022-01-10 06:40:55,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:40:55,112 INFO L470 AbstractCegarLoop]: Abstraction has 34 states and 41 transitions. [2022-01-10 06:40:55,112 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.0) internal successors, (14), 6 states have internal predecessors, (14), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-10 06:40:55,112 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 41 transitions. [2022-01-10 06:40:55,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-10 06:40:55,112 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:40:55,113 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:40:55,126 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Ended with exit code 0 [2022-01-10 06:40:55,323 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 06:40:55,323 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:40:55,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:40:55,324 INFO L85 PathProgramCache]: Analyzing trace with hash 1312382097, now seen corresponding path program 1 times [2022-01-10 06:40:55,324 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:40:55,325 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [780234999] [2022-01-10 06:40:55,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:40:55,325 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:40:55,325 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:40:55,326 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:40:55,333 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2022-01-10 06:40:55,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:40:55,373 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 15 conjunts are in the unsatisfiable core [2022-01-10 06:40:55,375 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:40:55,693 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-10 06:40:55,693 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 06:40:55,992 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-10 06:40:55,992 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:40:55,992 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [780234999] [2022-01-10 06:40:55,992 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [780234999] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 06:40:55,993 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 06:40:55,993 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 7] total 16 [2022-01-10 06:40:55,993 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1723498857] [2022-01-10 06:40:55,993 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 06:40:55,993 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-10 06:40:55,993 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:40:55,994 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-10 06:40:55,994 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2022-01-10 06:40:55,994 INFO L87 Difference]: Start difference. First operand 34 states and 41 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 13 states have internal predecessors, (25), 5 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2022-01-10 06:40:56,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:40:56,315 INFO L93 Difference]: Finished difference Result 69 states and 83 transitions. [2022-01-10 06:40:56,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-10 06:40:56,316 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 13 states have internal predecessors, (25), 5 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 24 [2022-01-10 06:40:56,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:40:56,318 INFO L225 Difference]: With dead ends: 69 [2022-01-10 06:40:56,318 INFO L226 Difference]: Without dead ends: 45 [2022-01-10 06:40:56,319 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2022-01-10 06:40:56,320 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 25 mSDsluCounter, 279 mSDsCounter, 0 mSdLazyCounter, 126 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 310 SdHoareTripleChecker+Invalid, 133 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 126 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-10 06:40:56,320 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 310 Invalid, 133 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 126 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-10 06:40:56,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2022-01-10 06:40:56,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 41. [2022-01-10 06:40:56,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 27 states have (on average 1.1851851851851851) internal successors, (32), 29 states have internal predecessors, (32), 9 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (8), 7 states have call predecessors, (8), 8 states have call successors, (8) [2022-01-10 06:40:56,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 49 transitions. [2022-01-10 06:40:56,326 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 49 transitions. Word has length 24 [2022-01-10 06:40:56,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:40:56,327 INFO L470 AbstractCegarLoop]: Abstraction has 41 states and 49 transitions. [2022-01-10 06:40:56,327 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 13 states have internal predecessors, (25), 5 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2022-01-10 06:40:56,327 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 49 transitions. [2022-01-10 06:40:56,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-01-10 06:40:56,328 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:40:56,328 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:40:56,349 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2022-01-10 06:40:56,534 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 06:40:56,535 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:40:56,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:40:56,535 INFO L85 PathProgramCache]: Analyzing trace with hash 1322138469, now seen corresponding path program 2 times [2022-01-10 06:40:56,536 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:40:56,536 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1502627137] [2022-01-10 06:40:56,536 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-10 06:40:56,536 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:40:56,536 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:40:56,537 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:40:56,564 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2022-01-10 06:40:56,639 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-10 06:40:56,640 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 06:40:56,643 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 22 conjunts are in the unsatisfiable core [2022-01-10 06:40:56,644 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:40:57,099 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-10 06:40:57,099 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 06:40:57,778 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-10 06:40:57,779 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:40:57,779 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1502627137] [2022-01-10 06:40:57,779 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1502627137] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 06:40:57,779 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 06:40:57,779 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 23 [2022-01-10 06:40:57,779 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1282179158] [2022-01-10 06:40:57,779 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 06:40:57,780 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-10 06:40:57,780 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:40:57,780 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-10 06:40:57,780 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=421, Unknown=0, NotChecked=0, Total=506 [2022-01-10 06:40:57,780 INFO L87 Difference]: Start difference. First operand 41 states and 49 transitions. Second operand has 23 states, 22 states have (on average 1.3181818181818181) internal successors, (29), 18 states have internal predecessors, (29), 6 states have call successors, (7), 5 states have call predecessors, (7), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2022-01-10 06:40:59,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:40:59,317 INFO L93 Difference]: Finished difference Result 90 states and 111 transitions. [2022-01-10 06:40:59,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-01-10 06:40:59,318 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 1.3181818181818181) internal successors, (29), 18 states have internal predecessors, (29), 6 states have call successors, (7), 5 states have call predecessors, (7), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 25 [2022-01-10 06:40:59,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:40:59,319 INFO L225 Difference]: With dead ends: 90 [2022-01-10 06:40:59,319 INFO L226 Difference]: Without dead ends: 80 [2022-01-10 06:40:59,320 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 166 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=133, Invalid=737, Unknown=0, NotChecked=0, Total=870 [2022-01-10 06:40:59,320 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 61 mSDsluCounter, 475 mSDsCounter, 0 mSdLazyCounter, 483 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 512 SdHoareTripleChecker+Invalid, 529 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 483 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-01-10 06:40:59,321 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [68 Valid, 512 Invalid, 529 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 483 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-01-10 06:40:59,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2022-01-10 06:40:59,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 72. [2022-01-10 06:40:59,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 46 states have (on average 1.1956521739130435) internal successors, (55), 49 states have internal predecessors, (55), 18 states have call successors, (18), 7 states have call predecessors, (18), 7 states have return successors, (17), 15 states have call predecessors, (17), 17 states have call successors, (17) [2022-01-10 06:40:59,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 90 transitions. [2022-01-10 06:40:59,332 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 90 transitions. Word has length 25 [2022-01-10 06:40:59,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:40:59,332 INFO L470 AbstractCegarLoop]: Abstraction has 72 states and 90 transitions. [2022-01-10 06:40:59,333 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 1.3181818181818181) internal successors, (29), 18 states have internal predecessors, (29), 6 states have call successors, (7), 5 states have call predecessors, (7), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2022-01-10 06:40:59,333 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 90 transitions. [2022-01-10 06:40:59,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-01-10 06:40:59,333 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:40:59,333 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:40:59,357 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2022-01-10 06:40:59,542 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 06:40:59,542 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:40:59,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:40:59,543 INFO L85 PathProgramCache]: Analyzing trace with hash -941158096, now seen corresponding path program 1 times [2022-01-10 06:40:59,543 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:40:59,543 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [981602608] [2022-01-10 06:40:59,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:40:59,543 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:40:59,544 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:40:59,550 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:40:59,552 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2022-01-10 06:40:59,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:40:59,621 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 28 conjunts are in the unsatisfiable core [2022-01-10 06:40:59,624 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:40:59,784 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-01-10 06:41:00,234 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-10 06:41:00,235 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-10 06:41:00,242 INFO L353 Elim1Store]: treesize reduction 3, result has 70.0 percent of original size [2022-01-10 06:41:00,243 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 28 treesize of output 16 [2022-01-10 06:41:00,340 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-10 06:41:00,340 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 06:41:13,314 INFO L353 Elim1Store]: treesize reduction 9, result has 50.0 percent of original size [2022-01-10 06:41:13,314 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 141 treesize of output 114 [2022-01-10 06:41:14,094 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-10 06:41:14,095 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:41:14,095 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [981602608] [2022-01-10 06:41:14,095 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [981602608] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 06:41:14,095 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 06:41:14,095 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 29 [2022-01-10 06:41:14,095 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [580650917] [2022-01-10 06:41:14,095 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 06:41:14,096 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-01-10 06:41:14,096 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:41:14,096 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-01-10 06:41:14,096 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=720, Unknown=6, NotChecked=0, Total=812 [2022-01-10 06:41:14,096 INFO L87 Difference]: Start difference. First operand 72 states and 90 transitions. Second operand has 29 states, 25 states have (on average 1.32) internal successors, (33), 22 states have internal predecessors, (33), 6 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2022-01-10 06:41:14,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:41:14,546 INFO L93 Difference]: Finished difference Result 84 states and 103 transitions. [2022-01-10 06:41:14,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-01-10 06:41:14,546 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 25 states have (on average 1.32) internal successors, (33), 22 states have internal predecessors, (33), 6 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) Word has length 27 [2022-01-10 06:41:14,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:41:14,547 INFO L225 Difference]: With dead ends: 84 [2022-01-10 06:41:14,547 INFO L226 Difference]: Without dead ends: 70 [2022-01-10 06:41:14,548 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 13.6s TimeCoverageRelationStatistics Valid=105, Invalid=881, Unknown=6, NotChecked=0, Total=992 [2022-01-10 06:41:14,548 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 17 mSDsluCounter, 440 mSDsCounter, 0 mSdLazyCounter, 127 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 468 SdHoareTripleChecker+Invalid, 219 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 127 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 90 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-10 06:41:14,548 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 468 Invalid, 219 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 127 Invalid, 0 Unknown, 90 Unchecked, 0.3s Time] [2022-01-10 06:41:14,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2022-01-10 06:41:14,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 66. [2022-01-10 06:41:14,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 42 states have (on average 1.1904761904761905) internal successors, (50), 44 states have internal predecessors, (50), 17 states have call successors, (17), 6 states have call predecessors, (17), 6 states have return successors, (16), 15 states have call predecessors, (16), 16 states have call successors, (16) [2022-01-10 06:41:14,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 83 transitions. [2022-01-10 06:41:14,556 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 83 transitions. Word has length 27 [2022-01-10 06:41:14,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:41:14,556 INFO L470 AbstractCegarLoop]: Abstraction has 66 states and 83 transitions. [2022-01-10 06:41:14,556 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 25 states have (on average 1.32) internal successors, (33), 22 states have internal predecessors, (33), 6 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2022-01-10 06:41:14,556 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 83 transitions. [2022-01-10 06:41:14,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-01-10 06:41:14,557 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:41:14,557 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:41:14,564 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2022-01-10 06:41:14,759 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 06:41:14,759 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:41:14,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:41:14,760 INFO L85 PathProgramCache]: Analyzing trace with hash 1321150128, now seen corresponding path program 2 times [2022-01-10 06:41:14,761 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:41:14,761 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1933420256] [2022-01-10 06:41:14,761 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-10 06:41:14,761 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:41:14,761 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:41:14,762 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:41:14,762 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2022-01-10 06:41:14,823 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-10 06:41:14,823 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 06:41:14,827 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-10 06:41:14,828 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:41:15,179 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-10 06:41:15,180 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 06:41:15,885 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-10 06:41:15,885 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:41:15,885 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1933420256] [2022-01-10 06:41:15,885 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1933420256] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 06:41:15,885 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 06:41:15,885 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 9] total 20 [2022-01-10 06:41:15,885 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1401673714] [2022-01-10 06:41:15,885 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 06:41:15,886 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-10 06:41:15,886 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:41:15,886 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-10 06:41:15,886 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=303, Unknown=0, NotChecked=0, Total=380 [2022-01-10 06:41:15,886 INFO L87 Difference]: Start difference. First operand 66 states and 83 transitions. Second operand has 20 states, 20 states have (on average 1.6) internal successors, (32), 19 states have internal predecessors, (32), 5 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2022-01-10 06:41:16,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:41:16,419 INFO L93 Difference]: Finished difference Result 85 states and 106 transitions. [2022-01-10 06:41:16,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-10 06:41:16,420 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.6) internal successors, (32), 19 states have internal predecessors, (32), 5 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) Word has length 29 [2022-01-10 06:41:16,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:41:16,421 INFO L225 Difference]: With dead ends: 85 [2022-01-10 06:41:16,421 INFO L226 Difference]: Without dead ends: 77 [2022-01-10 06:41:16,421 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=111, Invalid=441, Unknown=0, NotChecked=0, Total=552 [2022-01-10 06:41:16,422 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 44 mSDsluCounter, 266 mSDsCounter, 0 mSdLazyCounter, 185 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 301 SdHoareTripleChecker+Invalid, 214 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 185 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-10 06:41:16,422 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [48 Valid, 301 Invalid, 214 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 185 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-10 06:41:16,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2022-01-10 06:41:16,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 68. [2022-01-10 06:41:16,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 43 states have (on average 1.186046511627907) internal successors, (51), 46 states have internal predecessors, (51), 17 states have call successors, (17), 6 states have call predecessors, (17), 7 states have return successors, (17), 15 states have call predecessors, (17), 16 states have call successors, (17) [2022-01-10 06:41:16,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 85 transitions. [2022-01-10 06:41:16,429 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 85 transitions. Word has length 29 [2022-01-10 06:41:16,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:41:16,429 INFO L470 AbstractCegarLoop]: Abstraction has 68 states and 85 transitions. [2022-01-10 06:41:16,429 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.6) internal successors, (32), 19 states have internal predecessors, (32), 5 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2022-01-10 06:41:16,429 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 85 transitions. [2022-01-10 06:41:16,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-01-10 06:41:16,430 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:41:16,430 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:41:16,445 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2022-01-10 06:41:16,641 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 06:41:16,644 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:41:16,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:41:16,644 INFO L85 PathProgramCache]: Analyzing trace with hash 2022663126, now seen corresponding path program 1 times [2022-01-10 06:41:16,644 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:41:16,644 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1979567906] [2022-01-10 06:41:16,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:41:16,645 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:41:16,645 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:41:16,646 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:41:16,646 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2022-01-10 06:41:16,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:41:16,709 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 30 conjunts are in the unsatisfiable core [2022-01-10 06:41:16,710 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:41:17,379 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 2 proven. 15 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-10 06:41:17,379 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 06:41:18,595 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-01-10 06:41:18,596 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:41:18,596 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1979567906] [2022-01-10 06:41:18,596 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1979567906] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 06:41:18,596 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 06:41:18,596 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 14] total 29 [2022-01-10 06:41:18,596 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1191619360] [2022-01-10 06:41:18,596 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 06:41:18,596 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-01-10 06:41:18,596 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:41:18,597 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-01-10 06:41:18,598 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=692, Unknown=0, NotChecked=0, Total=812 [2022-01-10 06:41:18,598 INFO L87 Difference]: Start difference. First operand 68 states and 85 transitions. Second operand has 29 states, 29 states have (on average 1.4482758620689655) internal successors, (42), 22 states have internal predecessors, (42), 8 states have call successors, (13), 7 states have call predecessors, (13), 2 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) [2022-01-10 06:41:20,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:41:20,986 INFO L93 Difference]: Finished difference Result 176 states and 228 transitions. [2022-01-10 06:41:20,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-01-10 06:41:20,989 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.4482758620689655) internal successors, (42), 22 states have internal predecessors, (42), 8 states have call successors, (13), 7 states have call predecessors, (13), 2 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) Word has length 41 [2022-01-10 06:41:20,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:41:20,990 INFO L225 Difference]: With dead ends: 176 [2022-01-10 06:41:20,990 INFO L226 Difference]: Without dead ends: 159 [2022-01-10 06:41:20,991 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 52 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 285 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=211, Invalid=1271, Unknown=0, NotChecked=0, Total=1482 [2022-01-10 06:41:20,991 INFO L933 BasicCegarLoop]: 47 mSDtfsCounter, 108 mSDsluCounter, 573 mSDsCounter, 0 mSdLazyCounter, 671 mSolverCounterSat, 124 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 620 SdHoareTripleChecker+Invalid, 795 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 124 IncrementalHoareTripleChecker+Valid, 671 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-01-10 06:41:20,992 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [114 Valid, 620 Invalid, 795 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [124 Valid, 671 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-01-10 06:41:20,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2022-01-10 06:41:21,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 131. [2022-01-10 06:41:21,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 79 states have (on average 1.1898734177215189) internal successors, (94), 87 states have internal predecessors, (94), 38 states have call successors, (38), 12 states have call predecessors, (38), 13 states have return successors, (38), 31 states have call predecessors, (38), 37 states have call successors, (38) [2022-01-10 06:41:21,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 170 transitions. [2022-01-10 06:41:21,014 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 170 transitions. Word has length 41 [2022-01-10 06:41:21,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:41:21,015 INFO L470 AbstractCegarLoop]: Abstraction has 131 states and 170 transitions. [2022-01-10 06:41:21,015 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.4482758620689655) internal successors, (42), 22 states have internal predecessors, (42), 8 states have call successors, (13), 7 states have call predecessors, (13), 2 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) [2022-01-10 06:41:21,015 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 170 transitions. [2022-01-10 06:41:21,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-01-10 06:41:21,016 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:41:21,016 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:41:21,023 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2022-01-10 06:41:21,219 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 06:41:21,219 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:41:21,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:41:21,220 INFO L85 PathProgramCache]: Analyzing trace with hash 1294197056, now seen corresponding path program 1 times [2022-01-10 06:41:21,220 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:41:21,220 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [343413172] [2022-01-10 06:41:21,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:41:21,220 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:41:21,220 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:41:21,221 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:41:21,222 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2022-01-10 06:41:21,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:41:21,288 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 33 conjunts are in the unsatisfiable core [2022-01-10 06:41:21,290 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:41:22,061 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 2 proven. 19 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-10 06:41:22,062 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 06:41:24,178 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-01-10 06:41:24,179 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:41:24,179 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [343413172] [2022-01-10 06:41:24,179 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [343413172] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 06:41:24,179 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 06:41:24,179 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 32 [2022-01-10 06:41:24,179 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [520408527] [2022-01-10 06:41:24,179 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 06:41:24,179 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-01-10 06:41:24,180 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:41:24,180 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-01-10 06:41:24,180 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=846, Unknown=0, NotChecked=0, Total=992 [2022-01-10 06:41:24,180 INFO L87 Difference]: Start difference. First operand 131 states and 170 transitions. Second operand has 32 states, 31 states have (on average 1.4193548387096775) internal successors, (44), 25 states have internal predecessors, (44), 9 states have call successors, (13), 7 states have call predecessors, (13), 2 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) [2022-01-10 06:41:27,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:41:27,675 INFO L93 Difference]: Finished difference Result 275 states and 362 transitions. [2022-01-10 06:41:27,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-01-10 06:41:27,677 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 31 states have (on average 1.4193548387096775) internal successors, (44), 25 states have internal predecessors, (44), 9 states have call successors, (13), 7 states have call predecessors, (13), 2 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) Word has length 42 [2022-01-10 06:41:27,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:41:27,679 INFO L225 Difference]: With dead ends: 275 [2022-01-10 06:41:27,679 INFO L226 Difference]: Without dead ends: 256 [2022-01-10 06:41:27,679 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 348 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=244, Invalid=1478, Unknown=0, NotChecked=0, Total=1722 [2022-01-10 06:41:27,680 INFO L933 BasicCegarLoop]: 61 mSDtfsCounter, 96 mSDsluCounter, 764 mSDsCounter, 0 mSdLazyCounter, 828 mSolverCounterSat, 123 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 104 SdHoareTripleChecker+Valid, 825 SdHoareTripleChecker+Invalid, 951 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 123 IncrementalHoareTripleChecker+Valid, 828 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-01-10 06:41:27,680 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [104 Valid, 825 Invalid, 951 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [123 Valid, 828 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2022-01-10 06:41:27,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 256 states. [2022-01-10 06:41:27,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 256 to 209. [2022-01-10 06:41:27,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 209 states, 124 states have (on average 1.185483870967742) internal successors, (147), 137 states have internal predecessors, (147), 64 states have call successors, (64), 20 states have call predecessors, (64), 20 states have return successors, (63), 51 states have call predecessors, (63), 63 states have call successors, (63) [2022-01-10 06:41:27,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 274 transitions. [2022-01-10 06:41:27,713 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 274 transitions. Word has length 42 [2022-01-10 06:41:27,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:41:27,713 INFO L470 AbstractCegarLoop]: Abstraction has 209 states and 274 transitions. [2022-01-10 06:41:27,713 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 31 states have (on average 1.4193548387096775) internal successors, (44), 25 states have internal predecessors, (44), 9 states have call successors, (13), 7 states have call predecessors, (13), 2 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) [2022-01-10 06:41:27,713 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 274 transitions. [2022-01-10 06:41:27,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-01-10 06:41:27,714 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:41:27,715 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:41:27,726 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2022-01-10 06:41:27,921 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 06:41:27,922 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:41:27,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:41:27,922 INFO L85 PathProgramCache]: Analyzing trace with hash 1871327404, now seen corresponding path program 1 times [2022-01-10 06:41:27,923 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:41:27,923 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [26031245] [2022-01-10 06:41:27,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:41:27,923 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:41:27,923 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:41:27,924 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:41:27,924 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2022-01-10 06:41:28,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:41:28,008 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 48 conjunts are in the unsatisfiable core [2022-01-10 06:41:28,010 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:41:28,213 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-01-10 06:41:30,295 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-10 06:41:30,301 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-10 06:41:30,302 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-10 06:41:30,338 INFO L353 Elim1Store]: treesize reduction 28, result has 55.6 percent of original size [2022-01-10 06:41:30,339 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 45 treesize of output 47 [2022-01-10 06:41:30,562 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 2 proven. 13 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-10 06:41:30,563 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 06:42:02,360 INFO L353 Elim1Store]: treesize reduction 92, result has 20.0 percent of original size [2022-01-10 06:42:02,361 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 293 treesize of output 239 [2022-01-10 06:42:10,774 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-10 06:42:10,774 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:42:10,775 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [26031245] [2022-01-10 06:42:10,775 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [26031245] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 06:42:10,775 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 06:42:10,775 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 21] total 41 [2022-01-10 06:42:10,775 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [340137883] [2022-01-10 06:42:10,775 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 06:42:10,775 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-01-10 06:42:10,775 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:42:10,776 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-01-10 06:42:10,776 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=1466, Unknown=16, NotChecked=0, Total=1640 [2022-01-10 06:42:10,776 INFO L87 Difference]: Start difference. First operand 209 states and 274 transitions. Second operand has 41 states, 35 states have (on average 1.4857142857142858) internal successors, (52), 32 states have internal predecessors, (52), 10 states have call successors, (13), 7 states have call predecessors, (13), 5 states have return successors, (10), 8 states have call predecessors, (10), 6 states have call successors, (10)