/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/automizer/BvToInt/svcomp-Reach-64bit-Automizer_Bitvector.epf -i ../../../trunk/examples/svcomp/seq-mthreaded/pals_opt-floodmax.3.2.ufo.BOUNDED-6.pals.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-a10ec3b [2022-01-10 06:53:50,070 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-10 06:53:50,072 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-10 06:53:50,130 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-01-10 06:53:50,130 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-01-10 06:53:50,133 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-01-10 06:53:50,136 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-01-10 06:53:50,138 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-01-10 06:53:50,141 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-01-10 06:53:50,144 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-01-10 06:53:50,145 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-01-10 06:53:50,145 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... 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[2022-01-10 06:53:50,170 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-10 06:53:50,170 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-10 06:53:50,170 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-10 06:53:50,173 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 06:53:50,196 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-10 06:53:50,196 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-10 06:53:50,196 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-01-10 06:53:50,197 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-01-10 06:53:50,197 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-01-10 06:53:50,197 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-01-10 06:53:50,197 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-01-10 06:53:50,198 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-01-10 06:53:50,198 INFO L138 SettingsManager]: * Use SBE=true [2022-01-10 06:53:50,198 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-10 06:53:50,198 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-10 06:53:50,198 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-10 06:53:50,198 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-10 06:53:50,198 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-10 06:53:50,198 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-10 06:53:50,198 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-01-10 06:53:50,199 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-01-10 06:53:50,199 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-01-10 06:53:50,199 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-10 06:53:50,199 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-10 06:53:50,199 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-10 06:53:50,199 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-10 06:53:50,199 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-10 06:53:50,199 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-10 06:53:50,199 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-10 06:53:50,200 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-01-10 06:53:50,200 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-01-10 06:53:50,200 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2022-01-10 06:53:50,200 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-01-10 06:53:50,200 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-01-10 06:53:50,200 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-01-10 06:53:50,200 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-01-10 06:53:50,200 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-01-10 06:53:50,200 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-10 06:53:50,409 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-10 06:53:50,431 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-10 06:53:50,433 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-10 06:53:50,434 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-10 06:53:50,435 INFO L275 PluginConnector]: CDTParser initialized [2022-01-10 06:53:50,436 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded/pals_opt-floodmax.3.2.ufo.BOUNDED-6.pals.c [2022-01-10 06:53:50,496 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/726496eac/b6f9b27dbc194a7584f1621651ad560b/FLAGc3ed830b2 [2022-01-10 06:53:50,881 INFO L306 CDTParser]: Found 1 translation units. [2022-01-10 06:53:50,882 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/seq-mthreaded/pals_opt-floodmax.3.2.ufo.BOUNDED-6.pals.c [2022-01-10 06:53:50,899 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/726496eac/b6f9b27dbc194a7584f1621651ad560b/FLAGc3ed830b2 [2022-01-10 06:53:50,908 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/726496eac/b6f9b27dbc194a7584f1621651ad560b [2022-01-10 06:53:50,910 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-10 06:53:50,910 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-01-10 06:53:50,915 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-10 06:53:50,915 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-10 06:53:50,917 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-10 06:53:50,918 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 06:53:50" (1/1) ... [2022-01-10 06:53:50,918 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1f8cc080 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:53:50, skipping insertion in model container [2022-01-10 06:53:50,919 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 06:53:50" (1/1) ... [2022-01-10 06:53:50,922 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-10 06:53:50,956 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-10 06:53:51,142 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/seq-mthreaded/pals_opt-floodmax.3.2.ufo.BOUNDED-6.pals.c[14373,14386] [2022-01-10 06:53:51,144 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-10 06:53:51,160 INFO L203 MainTranslator]: Completed pre-run [2022-01-10 06:53:51,195 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/seq-mthreaded/pals_opt-floodmax.3.2.ufo.BOUNDED-6.pals.c[14373,14386] [2022-01-10 06:53:51,195 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-10 06:53:51,205 INFO L208 MainTranslator]: Completed translation [2022-01-10 06:53:51,205 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:53:51 WrapperNode [2022-01-10 06:53:51,206 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-10 06:53:51,206 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-01-10 06:53:51,206 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-01-10 06:53:51,206 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-01-10 06:53:51,211 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:53:51" (1/1) ... [2022-01-10 06:53:51,220 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:53:51" (1/1) ... [2022-01-10 06:53:51,256 INFO L137 Inliner]: procedures = 22, calls = 14, calls flagged for inlining = 9, calls inlined = 9, statements flattened = 459 [2022-01-10 06:53:51,257 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-01-10 06:53:51,257 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-10 06:53:51,257 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-10 06:53:51,257 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-10 06:53:51,269 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:53:51" (1/1) ... [2022-01-10 06:53:51,269 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:53:51" (1/1) ... [2022-01-10 06:53:51,273 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:53:51" (1/1) ... [2022-01-10 06:53:51,274 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:53:51" (1/1) ... [2022-01-10 06:53:51,281 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:53:51" (1/1) ... [2022-01-10 06:53:51,286 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:53:51" (1/1) ... [2022-01-10 06:53:51,288 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:53:51" (1/1) ... [2022-01-10 06:53:51,290 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-10 06:53:51,291 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-10 06:53:51,291 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-10 06:53:51,291 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-10 06:53:51,292 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:53:51" (1/1) ... [2022-01-10 06:53:51,315 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-10 06:53:51,328 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 06:53:51,343 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 06:53:51,362 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 06:53:51,372 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-10 06:53:51,373 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-01-10 06:53:51,373 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-10 06:53:51,373 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-10 06:53:51,442 INFO L234 CfgBuilder]: Building ICFG [2022-01-10 06:53:51,443 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-10 06:53:51,876 INFO L275 CfgBuilder]: Performing block encoding [2022-01-10 06:53:51,881 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-10 06:53:51,881 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-01-10 06:53:51,883 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 06:53:51 BoogieIcfgContainer [2022-01-10 06:53:51,883 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-10 06:53:51,884 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-10 06:53:51,884 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-10 06:53:51,888 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-10 06:53:51,888 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 10.01 06:53:50" (1/3) ... [2022-01-10 06:53:51,888 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4551ec06 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 06:53:51, skipping insertion in model container [2022-01-10 06:53:51,888 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:53:51" (2/3) ... [2022-01-10 06:53:51,889 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4551ec06 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 06:53:51, skipping insertion in model container [2022-01-10 06:53:51,889 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 06:53:51" (3/3) ... [2022-01-10 06:53:51,891 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_opt-floodmax.3.2.ufo.BOUNDED-6.pals.c [2022-01-10 06:53:51,894 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-01-10 06:53:51,894 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-10 06:53:51,923 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-10 06:53:51,928 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 06:53:51,928 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-01-10 06:53:51,951 INFO L276 IsEmpty]: Start isEmpty. Operand has 143 states, 141 states have (on average 1.7588652482269505) internal successors, (248), 142 states have internal predecessors, (248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 06:53:51,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-01-10 06:53:51,957 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:53:51,957 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:53:51,957 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:53:51,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:53:51,961 INFO L85 PathProgramCache]: Analyzing trace with hash -1418405445, now seen corresponding path program 1 times [2022-01-10 06:53:51,968 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:53:51,968 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1728494001] [2022-01-10 06:53:51,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:53:51,969 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:53:51,969 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:53:51,981 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 06:53:51,982 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 06:53:52,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:53:52,064 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 1 conjunts are in the unsatisfiable core [2022-01-10 06:53:52,067 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:53:52,143 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 06:53:52,143 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:53:52,143 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:53:52,144 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1728494001] [2022-01-10 06:53:52,144 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1728494001] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:53:52,144 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:53:52,144 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-01-10 06:53:52,145 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1620884585] [2022-01-10 06:53:52,146 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:53:52,149 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-01-10 06:53:52,150 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:53:52,170 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-01-10 06:53:52,171 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-01-10 06:53:52,174 INFO L87 Difference]: Start difference. First operand has 143 states, 141 states have (on average 1.7588652482269505) internal successors, (248), 142 states have internal predecessors, (248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 18.5) internal successors, (37), 2 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 06:53:52,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:53:52,204 INFO L93 Difference]: Finished difference Result 227 states and 388 transitions. [2022-01-10 06:53:52,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-01-10 06:53:52,206 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 18.5) internal successors, (37), 2 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2022-01-10 06:53:52,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:53:52,213 INFO L225 Difference]: With dead ends: 227 [2022-01-10 06:53:52,213 INFO L226 Difference]: Without dead ends: 139 [2022-01-10 06:53:52,215 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 36 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 06:53:52,217 INFO L933 BasicCegarLoop]: 245 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, 245 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 06:53:52,218 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 245 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 06:53:52,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2022-01-10 06:53:52,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 139. [2022-01-10 06:53:52,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 138 states have (on average 1.7463768115942029) internal successors, (241), 138 states have internal predecessors, (241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 06:53:52,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 241 transitions. [2022-01-10 06:53:52,248 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 241 transitions. Word has length 37 [2022-01-10 06:53:52,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:53:52,249 INFO L470 AbstractCegarLoop]: Abstraction has 139 states and 241 transitions. [2022-01-10 06:53:52,249 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 18.5) internal successors, (37), 2 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 06:53:52,249 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 241 transitions. [2022-01-10 06:53:52,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-01-10 06:53:52,250 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:53:52,250 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:53:52,262 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 06:53:52,459 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 06:53:52,460 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:53:52,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:53:52,460 INFO L85 PathProgramCache]: Analyzing trace with hash 2058913401, now seen corresponding path program 1 times [2022-01-10 06:53:52,465 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:53:52,465 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1851028082] [2022-01-10 06:53:52,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:53:52,466 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:53:52,466 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:53:52,468 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 06:53:52,469 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 06:53:52,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:53:52,585 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-10 06:53:52,587 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:53:52,705 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 06:53:52,705 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:53:52,705 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:53:52,705 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1851028082] [2022-01-10 06:53:52,705 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1851028082] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:53:52,706 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:53:52,706 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-10 06:53:52,706 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1075764468] [2022-01-10 06:53:52,706 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:53:52,707 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 06:53:52,707 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:53:52,707 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 06:53:52,708 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-10 06:53:52,708 INFO L87 Difference]: Start difference. First operand 139 states and 241 transitions. Second operand has 5 states, 5 states have (on average 7.4) internal successors, (37), 5 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 06:53:52,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:53:52,767 INFO L93 Difference]: Finished difference Result 222 states and 378 transitions. [2022-01-10 06:53:52,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-10 06:53:52,767 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.4) internal successors, (37), 5 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2022-01-10 06:53:52,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:53:52,768 INFO L225 Difference]: With dead ends: 222 [2022-01-10 06:53:52,768 INFO L226 Difference]: Without dead ends: 139 [2022-01-10 06:53:52,769 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-01-10 06:53:52,770 INFO L933 BasicCegarLoop]: 239 mSDtfsCounter, 3 mSDsluCounter, 684 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 923 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 06:53:52,770 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 923 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 06:53:52,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2022-01-10 06:53:52,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 139. [2022-01-10 06:53:52,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 138 states have (on average 1.5289855072463767) internal successors, (211), 138 states have internal predecessors, (211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 06:53:52,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 211 transitions. [2022-01-10 06:53:52,777 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 211 transitions. Word has length 37 [2022-01-10 06:53:52,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:53:52,777 INFO L470 AbstractCegarLoop]: Abstraction has 139 states and 211 transitions. [2022-01-10 06:53:52,777 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.4) internal successors, (37), 5 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 06:53:52,777 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 211 transitions. [2022-01-10 06:53:52,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-01-10 06:53:52,778 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:53:52,779 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:53:52,787 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 06:53:52,985 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 06:53:52,985 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:53:52,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:53:52,986 INFO L85 PathProgramCache]: Analyzing trace with hash -415118785, now seen corresponding path program 1 times [2022-01-10 06:53:52,986 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:53:52,986 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [89752660] [2022-01-10 06:53:52,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:53:52,987 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:53:52,987 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:53:52,988 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 06:53:52,990 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 06:53:53,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:53:53,067 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-10 06:53:53,073 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:53:53,210 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 06:53:53,210 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:53:53,210 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:53:53,211 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [89752660] [2022-01-10 06:53:53,211 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [89752660] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:53:53,211 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:53:53,211 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 06:53:53,214 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2056149410] [2022-01-10 06:53:53,214 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:53:53,215 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 06:53:53,215 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:53:53,216 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 06:53:53,217 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 06:53:53,217 INFO L87 Difference]: Start difference. First operand 139 states and 211 transitions. Second operand has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 06:53:53,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:53:53,263 INFO L93 Difference]: Finished difference Result 287 states and 459 transitions. [2022-01-10 06:53:53,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 06:53:53,263 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 66 [2022-01-10 06:53:53,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:53:53,268 INFO L225 Difference]: With dead ends: 287 [2022-01-10 06:53:53,268 INFO L226 Difference]: Without dead ends: 208 [2022-01-10 06:53:53,269 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 06:53:53,270 INFO L933 BasicCegarLoop]: 206 mSDtfsCounter, 107 mSDsluCounter, 168 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 374 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 06:53:53,270 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [107 Valid, 374 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 06:53:53,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2022-01-10 06:53:53,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 206. [2022-01-10 06:53:53,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 206 states, 205 states have (on average 1.5609756097560976) internal successors, (320), 205 states have internal predecessors, (320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 06:53:53,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 320 transitions. [2022-01-10 06:53:53,291 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 320 transitions. Word has length 66 [2022-01-10 06:53:53,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:53:53,291 INFO L470 AbstractCegarLoop]: Abstraction has 206 states and 320 transitions. [2022-01-10 06:53:53,292 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 06:53:53,292 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 320 transitions. [2022-01-10 06:53:53,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-01-10 06:53:53,293 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:53:53,293 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:53:53,308 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 06:53:53,494 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 06:53:53,494 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:53:53,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:53:53,495 INFO L85 PathProgramCache]: Analyzing trace with hash 928134868, now seen corresponding path program 1 times [2022-01-10 06:53:53,495 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:53:53,496 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1062856237] [2022-01-10 06:53:53,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:53:53,496 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:53:53,497 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:53:53,498 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 06:53:53,500 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 06:53:53,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:53:53,572 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 3 conjunts are in the unsatisfiable core [2022-01-10 06:53:53,574 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:53:53,734 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 06:53:53,734 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:53:53,734 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:53:53,734 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1062856237] [2022-01-10 06:53:53,736 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1062856237] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:53:53,737 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:53:53,737 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 06:53:53,737 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1098013824] [2022-01-10 06:53:53,739 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:53:53,739 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-10 06:53:53,739 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:53:53,740 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-10 06:53:53,740 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-10 06:53:53,740 INFO L87 Difference]: Start difference. First operand 206 states and 320 transitions. Second operand has 4 states, 4 states have (on average 17.0) internal successors, (68), 4 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 06:53:53,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:53:53,770 INFO L93 Difference]: Finished difference Result 595 states and 921 transitions. [2022-01-10 06:53:53,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-10 06:53:53,771 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 17.0) internal successors, (68), 4 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 68 [2022-01-10 06:53:53,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:53:53,772 INFO L225 Difference]: With dead ends: 595 [2022-01-10 06:53:53,772 INFO L226 Difference]: Without dead ends: 398 [2022-01-10 06:53:53,773 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-10 06:53:53,774 INFO L933 BasicCegarLoop]: 211 mSDtfsCounter, 540 mSDsluCounter, 190 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 540 SdHoareTripleChecker+Valid, 401 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 06:53:53,774 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [540 Valid, 401 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 06:53:53,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 398 states. [2022-01-10 06:53:53,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 398 to 396. [2022-01-10 06:53:53,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 396 states, 395 states have (on average 1.5417721518987342) internal successors, (609), 395 states have internal predecessors, (609), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 06:53:53,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 396 states to 396 states and 609 transitions. [2022-01-10 06:53:53,789 INFO L78 Accepts]: Start accepts. Automaton has 396 states and 609 transitions. Word has length 68 [2022-01-10 06:53:53,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:53:53,790 INFO L470 AbstractCegarLoop]: Abstraction has 396 states and 609 transitions. [2022-01-10 06:53:53,790 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.0) internal successors, (68), 4 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 06:53:53,790 INFO L276 IsEmpty]: Start isEmpty. Operand 396 states and 609 transitions. [2022-01-10 06:53:53,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-01-10 06:53:53,792 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:53:53,792 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:53:53,801 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Ended with exit code 0 [2022-01-10 06:53:53,999 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 06:53:53,999 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:53:54,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:53:54,000 INFO L85 PathProgramCache]: Analyzing trace with hash 641029695, now seen corresponding path program 1 times [2022-01-10 06:53:54,000 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:53:54,000 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1691898679] [2022-01-10 06:53:54,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:53:54,001 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:53:54,001 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:53:54,002 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 06:53:54,003 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 06:53:54,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:53:54,122 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-10 06:53:54,133 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:53:54,235 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 06:53:54,236 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:53:54,236 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:53:54,236 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1691898679] [2022-01-10 06:53:54,236 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1691898679] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:53:54,236 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:53:54,236 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 06:53:54,236 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1720349469] [2022-01-10 06:53:54,236 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:53:54,237 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 06:53:54,237 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:53:54,237 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 06:53:54,237 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 06:53:54,237 INFO L87 Difference]: Start difference. First operand 396 states and 609 transitions. Second operand has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 06:53:54,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:53:54,255 INFO L93 Difference]: Finished difference Result 818 states and 1311 transitions. [2022-01-10 06:53:54,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 06:53:54,256 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 69 [2022-01-10 06:53:54,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:53:54,258 INFO L225 Difference]: With dead ends: 818 [2022-01-10 06:53:54,258 INFO L226 Difference]: Without dead ends: 536 [2022-01-10 06:53:54,258 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 06:53:54,259 INFO L933 BasicCegarLoop]: 298 mSDtfsCounter, 121 mSDsluCounter, 191 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 121 SdHoareTripleChecker+Valid, 489 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 06:53:54,259 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [121 Valid, 489 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 06:53:54,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 536 states. [2022-01-10 06:53:54,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 536 to 524. [2022-01-10 06:53:54,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 524 states, 523 states have (on average 1.569789674952199) internal successors, (821), 523 states have internal predecessors, (821), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 06:53:54,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 524 states to 524 states and 821 transitions. [2022-01-10 06:53:54,272 INFO L78 Accepts]: Start accepts. Automaton has 524 states and 821 transitions. Word has length 69 [2022-01-10 06:53:54,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:53:54,272 INFO L470 AbstractCegarLoop]: Abstraction has 524 states and 821 transitions. [2022-01-10 06:53:54,273 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 06:53:54,273 INFO L276 IsEmpty]: Start isEmpty. Operand 524 states and 821 transitions. [2022-01-10 06:53:54,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-01-10 06:53:54,275 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:53:54,275 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:53:54,281 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 06:53:54,481 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 06:53:54,481 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:53:54,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:53:54,482 INFO L85 PathProgramCache]: Analyzing trace with hash -331084774, now seen corresponding path program 1 times [2022-01-10 06:53:54,482 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:53:54,482 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [608173784] [2022-01-10 06:53:54,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:53:54,483 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:53:54,483 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:53:54,487 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 06:53:54,489 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 06:53:54,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:53:54,553 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-10 06:53:54,555 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:53:54,650 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 06:53:54,651 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:53:54,651 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:53:54,651 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [608173784] [2022-01-10 06:53:54,651 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [608173784] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:53:54,651 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:53:54,651 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 06:53:54,651 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [364408872] [2022-01-10 06:53:54,652 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:53:54,652 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 06:53:54,652 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:53:54,652 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 06:53:54,652 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 06:53:54,652 INFO L87 Difference]: Start difference. First operand 524 states and 821 transitions. Second operand has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 06:53:54,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:53:54,670 INFO L93 Difference]: Finished difference Result 927 states and 1498 transitions. [2022-01-10 06:53:54,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 06:53:54,670 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 69 [2022-01-10 06:53:54,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:53:54,672 INFO L225 Difference]: With dead ends: 927 [2022-01-10 06:53:54,672 INFO L226 Difference]: Without dead ends: 647 [2022-01-10 06:53:54,673 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 06:53:54,674 INFO L933 BasicCegarLoop]: 301 mSDtfsCounter, 116 mSDsluCounter, 179 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 116 SdHoareTripleChecker+Valid, 480 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 06:53:54,674 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [116 Valid, 480 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 06:53:54,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 647 states. [2022-01-10 06:53:54,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 647 to 645. [2022-01-10 06:53:54,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 645 states, 644 states have (on average 1.5869565217391304) internal successors, (1022), 644 states have internal predecessors, (1022), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 06:53:54,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 645 states to 645 states and 1022 transitions. [2022-01-10 06:53:54,686 INFO L78 Accepts]: Start accepts. Automaton has 645 states and 1022 transitions. Word has length 69 [2022-01-10 06:53:54,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:53:54,686 INFO L470 AbstractCegarLoop]: Abstraction has 645 states and 1022 transitions. [2022-01-10 06:53:54,686 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 06:53:54,686 INFO L276 IsEmpty]: Start isEmpty. Operand 645 states and 1022 transitions. [2022-01-10 06:53:54,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-01-10 06:53:54,687 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:53:54,687 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:53:54,694 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 06:53:54,894 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 06:53:54,894 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:53:54,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:53:54,898 INFO L85 PathProgramCache]: Analyzing trace with hash 1726895368, now seen corresponding path program 1 times [2022-01-10 06:53:54,899 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:53:54,899 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1755775008] [2022-01-10 06:53:54,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:53:54,899 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:53:54,900 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:53:54,904 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 06:53:54,940 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 06:53:54,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:53:54,977 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-10 06:53:54,982 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:53:55,056 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 06:53:55,056 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:53:55,057 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:53:55,057 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1755775008] [2022-01-10 06:53:55,057 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1755775008] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:53:55,057 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:53:55,057 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 06:53:55,057 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1615646427] [2022-01-10 06:53:55,057 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:53:55,058 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 06:53:55,058 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:53:55,058 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 06:53:55,058 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 06:53:55,059 INFO L87 Difference]: Start difference. First operand 645 states and 1022 transitions. Second operand has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 06:53:55,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:53:55,080 INFO L93 Difference]: Finished difference Result 1897 states and 3004 transitions. [2022-01-10 06:53:55,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 06:53:55,080 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 69 [2022-01-10 06:53:55,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:53:55,084 INFO L225 Difference]: With dead ends: 1897 [2022-01-10 06:53:55,084 INFO L226 Difference]: Without dead ends: 1280 [2022-01-10 06:53:55,085 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 06:53:55,086 INFO L933 BasicCegarLoop]: 282 mSDtfsCounter, 200 mSDsluCounter, 202 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 200 SdHoareTripleChecker+Valid, 484 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 06:53:55,086 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [200 Valid, 484 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 06:53:55,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1280 states. [2022-01-10 06:53:55,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1280 to 647. [2022-01-10 06:53:55,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 647 states, 646 states have (on average 1.585139318885449) internal successors, (1024), 646 states have internal predecessors, (1024), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 06:53:55,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 647 states to 647 states and 1024 transitions. [2022-01-10 06:53:55,109 INFO L78 Accepts]: Start accepts. Automaton has 647 states and 1024 transitions. Word has length 69 [2022-01-10 06:53:55,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:53:55,109 INFO L470 AbstractCegarLoop]: Abstraction has 647 states and 1024 transitions. [2022-01-10 06:53:55,109 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 06:53:55,111 INFO L276 IsEmpty]: Start isEmpty. Operand 647 states and 1024 transitions. [2022-01-10 06:53:55,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-01-10 06:53:55,115 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:53:55,115 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:53:55,133 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 06:53:55,322 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 06:53:55,322 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:53:55,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:53:55,324 INFO L85 PathProgramCache]: Analyzing trace with hash 928817256, now seen corresponding path program 1 times [2022-01-10 06:53:55,324 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:53:55,324 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1832007123] [2022-01-10 06:53:55,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:53:55,324 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:53:55,324 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:53:55,326 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 06:53:55,332 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 06:53:55,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:53:55,394 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 3 conjunts are in the unsatisfiable core [2022-01-10 06:53:55,396 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:53:55,479 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 06:53:55,480 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:53:55,480 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:53:55,480 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1832007123] [2022-01-10 06:53:55,480 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1832007123] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:53:55,480 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:53:55,480 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 06:53:55,480 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1389414168] [2022-01-10 06:53:55,480 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:53:55,481 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-10 06:53:55,481 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:53:55,481 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-10 06:53:55,481 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-10 06:53:55,481 INFO L87 Difference]: Start difference. First operand 647 states and 1024 transitions. Second operand has 4 states, 4 states have (on average 17.5) internal successors, (70), 4 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 06:53:55,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:53:55,502 INFO L93 Difference]: Finished difference Result 1284 states and 2034 transitions. [2022-01-10 06:53:55,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-10 06:53:55,502 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 17.5) internal successors, (70), 4 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 70 [2022-01-10 06:53:55,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:53:55,504 INFO L225 Difference]: With dead ends: 1284 [2022-01-10 06:53:55,504 INFO L226 Difference]: Without dead ends: 645 [2022-01-10 06:53:55,505 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-10 06:53:55,505 INFO L933 BasicCegarLoop]: 253 mSDtfsCounter, 69 mSDsluCounter, 413 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 666 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 06:53:55,506 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [69 Valid, 666 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 06:53:55,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 645 states. [2022-01-10 06:53:55,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 645 to 645. [2022-01-10 06:53:55,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 645 states, 644 states have (on average 1.5838509316770186) internal successors, (1020), 644 states have internal predecessors, (1020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 06:53:55,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 645 states to 645 states and 1020 transitions. [2022-01-10 06:53:55,517 INFO L78 Accepts]: Start accepts. Automaton has 645 states and 1020 transitions. Word has length 70 [2022-01-10 06:53:55,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:53:55,518 INFO L470 AbstractCegarLoop]: Abstraction has 645 states and 1020 transitions. [2022-01-10 06:53:55,518 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.5) internal successors, (70), 4 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 06:53:55,518 INFO L276 IsEmpty]: Start isEmpty. Operand 645 states and 1020 transitions. [2022-01-10 06:53:55,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-01-10 06:53:55,518 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:53:55,518 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:53:55,534 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 06:53:55,725 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 06:53:55,725 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:53:55,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:53:55,726 INFO L85 PathProgramCache]: Analyzing trace with hash -2108063953, now seen corresponding path program 1 times [2022-01-10 06:53:55,726 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:53:55,726 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [778254375] [2022-01-10 06:53:55,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:53:55,726 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:53:55,726 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:53:55,727 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 06:53:55,729 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 06:53:55,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:53:55,819 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 3 conjunts are in the unsatisfiable core [2022-01-10 06:53:55,821 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:53:55,919 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 06:53:55,919 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:53:55,920 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:53:55,920 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [778254375] [2022-01-10 06:53:55,920 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [778254375] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:53:55,920 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:53:55,920 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 06:53:55,920 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [785078794] [2022-01-10 06:53:55,920 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:53:55,920 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-10 06:53:55,920 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:53:55,921 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-10 06:53:55,921 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-10 06:53:55,921 INFO L87 Difference]: Start difference. First operand 645 states and 1020 transitions. Second operand has 4 states, 4 states have (on average 17.5) internal successors, (70), 4 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 06:53:55,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:53:55,956 INFO L93 Difference]: Finished difference Result 1591 states and 2514 transitions. [2022-01-10 06:53:55,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-10 06:53:55,957 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 17.5) internal successors, (70), 4 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 70 [2022-01-10 06:53:55,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:53:55,959 INFO L225 Difference]: With dead ends: 1591 [2022-01-10 06:53:55,959 INFO L226 Difference]: Without dead ends: 956 [2022-01-10 06:53:55,960 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-10 06:53:55,960 INFO L933 BasicCegarLoop]: 302 mSDtfsCounter, 430 mSDsluCounter, 186 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 430 SdHoareTripleChecker+Valid, 488 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 06:53:55,961 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [430 Valid, 488 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 06:53:55,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 956 states. [2022-01-10 06:53:55,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 956 to 954. [2022-01-10 06:53:55,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 954 states, 953 states have (on average 1.5624344176285414) internal successors, (1489), 953 states have internal predecessors, (1489), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 06:53:55,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 954 states to 954 states and 1489 transitions. [2022-01-10 06:53:55,983 INFO L78 Accepts]: Start accepts. Automaton has 954 states and 1489 transitions. Word has length 70 [2022-01-10 06:53:55,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:53:55,984 INFO L470 AbstractCegarLoop]: Abstraction has 954 states and 1489 transitions. [2022-01-10 06:53:55,984 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.5) internal successors, (70), 4 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 06:53:55,984 INFO L276 IsEmpty]: Start isEmpty. Operand 954 states and 1489 transitions. [2022-01-10 06:53:55,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-01-10 06:53:55,985 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:53:55,985 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:53:55,991 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2022-01-10 06:53:56,191 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 06:53:56,191 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:53:56,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:53:56,192 INFO L85 PathProgramCache]: Analyzing trace with hash 1339391617, now seen corresponding path program 1 times [2022-01-10 06:53:56,192 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:53:56,192 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [389958302] [2022-01-10 06:53:56,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:53:56,192 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:53:56,192 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:53:56,208 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:53:56,222 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2022-01-10 06:53:56,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:53:56,282 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 3 conjunts are in the unsatisfiable core [2022-01-10 06:53:56,283 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:53:56,356 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 06:53:56,357 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:53:56,357 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:53:56,357 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [389958302] [2022-01-10 06:53:56,357 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [389958302] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:53:56,357 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:53:56,357 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 06:53:56,357 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1502904905] [2022-01-10 06:53:56,357 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:53:56,358 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-10 06:53:56,358 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:53:56,358 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-10 06:53:56,358 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-10 06:53:56,358 INFO L87 Difference]: Start difference. First operand 954 states and 1489 transitions. Second operand has 4 states, 4 states have (on average 18.25) internal successors, (73), 4 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 06:53:56,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:53:56,401 INFO L93 Difference]: Finished difference Result 2758 states and 4298 transitions. [2022-01-10 06:53:56,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-10 06:53:56,401 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 18.25) internal successors, (73), 4 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 73 [2022-01-10 06:53:56,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:53:56,406 INFO L225 Difference]: With dead ends: 2758 [2022-01-10 06:53:56,406 INFO L226 Difference]: Without dead ends: 1834 [2022-01-10 06:53:56,407 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-10 06:53:56,408 INFO L933 BasicCegarLoop]: 367 mSDtfsCounter, 384 mSDsluCounter, 193 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 384 SdHoareTripleChecker+Valid, 560 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 06:53:56,408 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [384 Valid, 560 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 06:53:56,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1834 states. [2022-01-10 06:53:56,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1834 to 1832. [2022-01-10 06:53:56,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1832 states, 1831 states have (on average 1.5428727471327144) internal successors, (2825), 1831 states have internal predecessors, (2825), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 06:53:56,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1832 states to 1832 states and 2825 transitions. [2022-01-10 06:53:56,450 INFO L78 Accepts]: Start accepts. Automaton has 1832 states and 2825 transitions. Word has length 73 [2022-01-10 06:53:56,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:53:56,450 INFO L470 AbstractCegarLoop]: Abstraction has 1832 states and 2825 transitions. [2022-01-10 06:53:56,450 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.25) internal successors, (73), 4 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 06:53:56,450 INFO L276 IsEmpty]: Start isEmpty. Operand 1832 states and 2825 transitions. [2022-01-10 06:53:56,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-01-10 06:53:56,451 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:53:56,451 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:53:56,465 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2022-01-10 06:53:56,657 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 06:53:56,658 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:53:56,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:53:56,658 INFO L85 PathProgramCache]: Analyzing trace with hash -1739421953, now seen corresponding path program 1 times [2022-01-10 06:53:56,658 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:53:56,659 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [747611649] [2022-01-10 06:53:56,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:53:56,659 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:53:56,659 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:53:56,660 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:53:56,662 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2022-01-10 06:53:56,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:53:56,734 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-10 06:53:56,736 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:53:56,826 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 06:53:56,827 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:53:56,827 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:53:56,827 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [747611649] [2022-01-10 06:53:56,827 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [747611649] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:53:56,827 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:53:56,827 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 06:53:56,827 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2068594329] [2022-01-10 06:53:56,827 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:53:56,828 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 06:53:56,828 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:53:56,828 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 06:53:56,828 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 06:53:56,828 INFO L87 Difference]: Start difference. First operand 1832 states and 2825 transitions. Second operand has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 3 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 06:53:56,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:53:56,878 INFO L93 Difference]: Finished difference Result 4684 states and 7439 transitions. [2022-01-10 06:53:56,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 06:53:56,878 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 3 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 73 [2022-01-10 06:53:56,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:53:56,887 INFO L225 Difference]: With dead ends: 4684 [2022-01-10 06:53:56,887 INFO L226 Difference]: Without dead ends: 3166 [2022-01-10 06:53:56,889 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 06:53:56,889 INFO L933 BasicCegarLoop]: 217 mSDtfsCounter, 106 mSDsluCounter, 174 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 391 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 06:53:56,890 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [106 Valid, 391 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 06:53:56,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3166 states. [2022-01-10 06:53:56,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3166 to 3164. [2022-01-10 06:53:56,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3164 states, 3163 states have (on average 1.566550742965539) internal successors, (4955), 3163 states have internal predecessors, (4955), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 06:53:56,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3164 states to 3164 states and 4955 transitions. [2022-01-10 06:53:56,980 INFO L78 Accepts]: Start accepts. Automaton has 3164 states and 4955 transitions. Word has length 73 [2022-01-10 06:53:56,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:53:56,981 INFO L470 AbstractCegarLoop]: Abstraction has 3164 states and 4955 transitions. [2022-01-10 06:53:56,981 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 3 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 06:53:56,981 INFO L276 IsEmpty]: Start isEmpty. Operand 3164 states and 4955 transitions. [2022-01-10 06:53:56,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-01-10 06:53:56,982 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:53:56,982 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:53:57,003 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2022-01-10 06:53:57,188 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 06:53:57,189 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:53:57,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:53:57,189 INFO L85 PathProgramCache]: Analyzing trace with hash 1868546612, now seen corresponding path program 1 times [2022-01-10 06:53:57,189 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:53:57,190 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1960117862] [2022-01-10 06:53:57,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:53:57,190 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:53:57,190 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:53:57,191 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:53:57,192 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2022-01-10 06:53:57,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:53:57,274 INFO L263 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 3 conjunts are in the unsatisfiable core [2022-01-10 06:53:57,276 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:53:57,372 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 06:53:57,372 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:53:57,372 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:53:57,372 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1960117862] [2022-01-10 06:53:57,372 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1960117862] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:53:57,372 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:53:57,372 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 06:53:57,372 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1707852682] [2022-01-10 06:53:57,373 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:53:57,373 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-10 06:53:57,373 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:53:57,373 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-10 06:53:57,373 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-10 06:53:57,373 INFO L87 Difference]: Start difference. First operand 3164 states and 4955 transitions. Second operand has 4 states, 4 states have (on average 18.75) internal successors, (75), 4 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 06:53:57,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:53:57,469 INFO L93 Difference]: Finished difference Result 9247 states and 14469 transitions. [2022-01-10 06:53:57,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-10 06:53:57,470 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 18.75) internal successors, (75), 4 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 75 [2022-01-10 06:53:57,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:53:57,485 INFO L225 Difference]: With dead ends: 9247 [2022-01-10 06:53:57,485 INFO L226 Difference]: Without dead ends: 6139 [2022-01-10 06:53:57,489 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-10 06:53:57,489 INFO L933 BasicCegarLoop]: 208 mSDtfsCounter, 498 mSDsluCounter, 187 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 498 SdHoareTripleChecker+Valid, 395 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 06:53:57,490 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [498 Valid, 395 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 06:53:57,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6139 states. [2022-01-10 06:53:57,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6139 to 6137. [2022-01-10 06:53:57,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6137 states, 6136 states have (on average 1.5529661016949152) internal successors, (9529), 6136 states have internal predecessors, (9529), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 06:53:57,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6137 states to 6137 states and 9529 transitions. [2022-01-10 06:53:57,672 INFO L78 Accepts]: Start accepts. Automaton has 6137 states and 9529 transitions. Word has length 75 [2022-01-10 06:53:57,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:53:57,672 INFO L470 AbstractCegarLoop]: Abstraction has 6137 states and 9529 transitions. [2022-01-10 06:53:57,672 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.75) internal successors, (75), 4 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 06:53:57,672 INFO L276 IsEmpty]: Start isEmpty. Operand 6137 states and 9529 transitions. [2022-01-10 06:53:57,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2022-01-10 06:53:57,674 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:53:57,674 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:53:57,692 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2022-01-10 06:53:57,894 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 06:53:57,894 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:53:57,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:53:57,895 INFO L85 PathProgramCache]: Analyzing trace with hash 106349760, now seen corresponding path program 1 times [2022-01-10 06:53:57,895 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:53:57,895 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [236283502] [2022-01-10 06:53:57,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:53:57,895 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:53:57,895 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:53:57,896 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:53:57,898 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2022-01-10 06:53:57,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:53:57,955 INFO L263 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-10 06:53:57,956 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:53:58,034 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 06:53:58,034 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:53:58,034 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:53:58,034 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [236283502] [2022-01-10 06:53:58,034 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [236283502] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:53:58,034 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:53:58,034 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 06:53:58,034 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1275939639] [2022-01-10 06:53:58,035 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:53:58,035 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 06:53:58,035 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:53:58,035 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 06:53:58,035 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 06:53:58,035 INFO L87 Difference]: Start difference. First operand 6137 states and 9529 transitions. Second operand has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 06:53:58,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:53:58,223 INFO L93 Difference]: Finished difference Result 14395 states and 22753 transitions. [2022-01-10 06:53:58,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 06:53:58,224 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 76 [2022-01-10 06:53:58,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:53:58,247 INFO L225 Difference]: With dead ends: 14395 [2022-01-10 06:53:58,247 INFO L226 Difference]: Without dead ends: 8853 [2022-01-10 06:53:58,252 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 06:53:58,252 INFO L933 BasicCegarLoop]: 271 mSDtfsCounter, 112 mSDsluCounter, 189 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 112 SdHoareTripleChecker+Valid, 460 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 06:53:58,253 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [112 Valid, 460 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 06:53:58,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8853 states. [2022-01-10 06:53:58,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8853 to 8627. [2022-01-10 06:53:58,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8627 states, 8626 states have (on average 1.55750057964294) internal successors, (13435), 8626 states have internal predecessors, (13435), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 06:53:58,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8627 states to 8627 states and 13435 transitions. [2022-01-10 06:53:58,477 INFO L78 Accepts]: Start accepts. Automaton has 8627 states and 13435 transitions. Word has length 76 [2022-01-10 06:53:58,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:53:58,477 INFO L470 AbstractCegarLoop]: Abstraction has 8627 states and 13435 transitions. [2022-01-10 06:53:58,478 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 06:53:58,478 INFO L276 IsEmpty]: Start isEmpty. Operand 8627 states and 13435 transitions. [2022-01-10 06:53:58,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2022-01-10 06:53:58,480 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:53:58,480 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:53:58,497 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2022-01-10 06:53:58,687 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 06:53:58,687 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:53:58,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:53:58,688 INFO L85 PathProgramCache]: Analyzing trace with hash 881902388, now seen corresponding path program 1 times [2022-01-10 06:53:58,688 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:53:58,688 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [813058451] [2022-01-10 06:53:58,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:53:58,688 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:53:58,688 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:53:58,689 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:53:58,708 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2022-01-10 06:53:58,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:53:58,786 INFO L263 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 5 conjunts are in the unsatisfiable core [2022-01-10 06:53:58,787 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:53:59,152 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 06:53:59,152 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:53:59,152 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:53:59,152 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [813058451] [2022-01-10 06:53:59,152 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [813058451] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:53:59,153 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:53:59,153 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-10 06:53:59,153 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [819241089] [2022-01-10 06:53:59,153 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:53:59,153 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-10 06:53:59,153 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:53:59,153 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-10 06:53:59,153 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-01-10 06:53:59,153 INFO L87 Difference]: Start difference. First operand 8627 states and 13435 transitions. Second operand has 6 states, 6 states have (on average 12.666666666666666) internal successors, (76), 5 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 06:53:59,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:53:59,272 INFO L93 Difference]: Finished difference Result 14089 states and 22064 transitions. [2022-01-10 06:53:59,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-10 06:53:59,273 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 12.666666666666666) internal successors, (76), 5 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 76 [2022-01-10 06:53:59,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:53:59,286 INFO L225 Difference]: With dead ends: 14089 [2022-01-10 06:53:59,286 INFO L226 Difference]: Without dead ends: 8679 [2022-01-10 06:53:59,293 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-01-10 06:53:59,293 INFO L933 BasicCegarLoop]: 203 mSDtfsCounter, 63 mSDsluCounter, 600 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 803 SdHoareTripleChecker+Invalid, 77 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 54 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 06:53:59,293 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [63 Valid, 803 Invalid, 77 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 22 Invalid, 0 Unknown, 54 Unchecked, 0.0s Time] [2022-01-10 06:53:59,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8679 states. [2022-01-10 06:53:59,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8679 to 8647. [2022-01-10 06:53:59,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8647 states, 8646 states have (on average 1.5566736062919269) internal successors, (13459), 8646 states have internal predecessors, (13459), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 06:53:59,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8647 states to 8647 states and 13459 transitions. [2022-01-10 06:53:59,488 INFO L78 Accepts]: Start accepts. Automaton has 8647 states and 13459 transitions. Word has length 76 [2022-01-10 06:53:59,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:53:59,488 INFO L470 AbstractCegarLoop]: Abstraction has 8647 states and 13459 transitions. [2022-01-10 06:53:59,488 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.666666666666666) internal successors, (76), 5 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 06:53:59,488 INFO L276 IsEmpty]: Start isEmpty. Operand 8647 states and 13459 transitions. [2022-01-10 06:53:59,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2022-01-10 06:53:59,490 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:53:59,490 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:53:59,496 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2022-01-10 06:53:59,696 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 06:53:59,696 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:53:59,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:53:59,697 INFO L85 PathProgramCache]: Analyzing trace with hash 1699550838, now seen corresponding path program 1 times [2022-01-10 06:53:59,697 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:53:59,697 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [810274812] [2022-01-10 06:53:59,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:53:59,697 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:53:59,697 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:53:59,698 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:53:59,712 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2022-01-10 06:53:59,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:53:59,770 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-10 06:53:59,771 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:53:59,893 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 06:53:59,893 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:53:59,893 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:53:59,893 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [810274812] [2022-01-10 06:53:59,894 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [810274812] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:53:59,894 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:53:59,894 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 06:53:59,894 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [920247077] [2022-01-10 06:53:59,894 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:53:59,894 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 06:53:59,895 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:53:59,895 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 06:53:59,895 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 06:53:59,895 INFO L87 Difference]: Start difference. First operand 8647 states and 13459 transitions. Second operand has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 06:54:00,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:54:00,016 INFO L93 Difference]: Finished difference Result 16445 states and 25915 transitions. [2022-01-10 06:54:00,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 06:54:00,017 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 76 [2022-01-10 06:54:00,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:54:00,036 INFO L225 Difference]: With dead ends: 16445 [2022-01-10 06:54:00,036 INFO L226 Difference]: Without dead ends: 10999 [2022-01-10 06:54:00,047 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 06:54:00,048 INFO L933 BasicCegarLoop]: 290 mSDtfsCounter, 107 mSDsluCounter, 177 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 467 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 06:54:00,048 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [107 Valid, 467 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 06:54:00,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10999 states. [2022-01-10 06:54:00,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10999 to 10997. [2022-01-10 06:54:00,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10997 states, 10996 states have (on average 1.559203346671517) internal successors, (17145), 10996 states have internal predecessors, (17145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 06:54:00,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10997 states to 10997 states and 17145 transitions. [2022-01-10 06:54:00,277 INFO L78 Accepts]: Start accepts. Automaton has 10997 states and 17145 transitions. Word has length 76 [2022-01-10 06:54:00,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:54:00,278 INFO L470 AbstractCegarLoop]: Abstraction has 10997 states and 17145 transitions. [2022-01-10 06:54:00,278 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 06:54:00,278 INFO L276 IsEmpty]: Start isEmpty. Operand 10997 states and 17145 transitions. [2022-01-10 06:54:00,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2022-01-10 06:54:00,280 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:54:00,280 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:54:00,287 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2022-01-10 06:54:00,487 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 06:54:00,487 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:54:00,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:54:00,487 INFO L85 PathProgramCache]: Analyzing trace with hash -1763365022, now seen corresponding path program 1 times [2022-01-10 06:54:00,488 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:54:00,488 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1930370778] [2022-01-10 06:54:00,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:54:00,488 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:54:00,488 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:54:00,489 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:54:00,490 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2022-01-10 06:54:00,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:54:00,553 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 3 conjunts are in the unsatisfiable core [2022-01-10 06:54:00,554 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:54:00,700 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 06:54:00,701 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:54:00,701 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:54:00,701 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1930370778] [2022-01-10 06:54:00,701 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1930370778] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:54:00,701 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:54:00,701 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 06:54:00,701 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1924737018] [2022-01-10 06:54:00,701 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:54:00,702 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-10 06:54:00,702 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:54:00,702 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-10 06:54:00,702 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-10 06:54:00,702 INFO L87 Difference]: Start difference. First operand 10997 states and 17145 transitions. Second operand has 4 states, 4 states have (on average 19.25) internal successors, (77), 4 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 06:54:00,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:54:00,897 INFO L93 Difference]: Finished difference Result 14124 states and 21961 transitions. [2022-01-10 06:54:00,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-10 06:54:00,897 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 19.25) internal successors, (77), 4 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 77 [2022-01-10 06:54:00,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:54:00,916 INFO L225 Difference]: With dead ends: 14124 [2022-01-10 06:54:00,917 INFO L226 Difference]: Without dead ends: 10992 [2022-01-10 06:54:00,924 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-10 06:54:00,925 INFO L933 BasicCegarLoop]: 240 mSDtfsCounter, 47 mSDsluCounter, 408 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 648 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 06:54:00,925 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [47 Valid, 648 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 06:54:00,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10992 states. [2022-01-10 06:54:01,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10992 to 10992. [2022-01-10 06:54:01,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10992 states, 10991 states have (on average 1.5592757710854335) internal successors, (17138), 10991 states have internal predecessors, (17138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 06:54:01,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10992 states to 10992 states and 17138 transitions. [2022-01-10 06:54:01,132 INFO L78 Accepts]: Start accepts. Automaton has 10992 states and 17138 transitions. Word has length 77 [2022-01-10 06:54:01,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:54:01,132 INFO L470 AbstractCegarLoop]: Abstraction has 10992 states and 17138 transitions. [2022-01-10 06:54:01,132 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.25) internal successors, (77), 4 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 06:54:01,132 INFO L276 IsEmpty]: Start isEmpty. Operand 10992 states and 17138 transitions. [2022-01-10 06:54:01,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2022-01-10 06:54:01,134 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:54:01,134 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:54:01,154 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (17)] Ended with exit code 0 [2022-01-10 06:54:01,341 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 06:54:01,341 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:54:01,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:54:01,342 INFO L85 PathProgramCache]: Analyzing trace with hash -796014368, now seen corresponding path program 1 times [2022-01-10 06:54:01,342 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:54:01,342 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [629519260] [2022-01-10 06:54:01,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:54:01,342 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:54:01,342 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:54:01,343 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:54:01,345 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2022-01-10 06:54:01,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:54:01,403 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 3 conjunts are in the unsatisfiable core [2022-01-10 06:54:01,404 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:54:01,503 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 06:54:01,503 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:54:01,504 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:54:01,504 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [629519260] [2022-01-10 06:54:01,553 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [629519260] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:54:01,553 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:54:01,553 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 06:54:01,553 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [222855228] [2022-01-10 06:54:01,553 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:54:01,553 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-10 06:54:01,553 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:54:01,554 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-10 06:54:01,554 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-10 06:54:01,554 INFO L87 Difference]: Start difference. First operand 10992 states and 17138 transitions. Second operand has 4 states, 4 states have (on average 19.25) internal successors, (77), 4 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 06:54:01,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:54:01,682 INFO L93 Difference]: Finished difference Result 14191 states and 22031 transitions. [2022-01-10 06:54:01,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-10 06:54:01,682 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 19.25) internal successors, (77), 4 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 77 [2022-01-10 06:54:01,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:54:01,702 INFO L225 Difference]: With dead ends: 14191 [2022-01-10 06:54:01,702 INFO L226 Difference]: Without dead ends: 8842 [2022-01-10 06:54:01,712 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-10 06:54:01,713 INFO L933 BasicCegarLoop]: 298 mSDtfsCounter, 455 mSDsluCounter, 185 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 455 SdHoareTripleChecker+Valid, 483 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 06:54:01,713 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [455 Valid, 483 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 06:54:01,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8842 states. [2022-01-10 06:54:01,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8842 to 8840. [2022-01-10 06:54:01,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8840 states, 8839 states have (on average 1.5397669419617603) internal successors, (13610), 8839 states have internal predecessors, (13610), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 06:54:01,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8840 states to 8840 states and 13610 transitions. [2022-01-10 06:54:01,884 INFO L78 Accepts]: Start accepts. Automaton has 8840 states and 13610 transitions. Word has length 77 [2022-01-10 06:54:01,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:54:01,885 INFO L470 AbstractCegarLoop]: Abstraction has 8840 states and 13610 transitions. [2022-01-10 06:54:01,885 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.25) internal successors, (77), 4 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 06:54:01,885 INFO L276 IsEmpty]: Start isEmpty. Operand 8840 states and 13610 transitions. [2022-01-10 06:54:01,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2022-01-10 06:54:01,886 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:54:01,886 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:54:01,902 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2022-01-10 06:54:02,093 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 06:54:02,094 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:54:02,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:54:02,094 INFO L85 PathProgramCache]: Analyzing trace with hash 182668069, now seen corresponding path program 1 times [2022-01-10 06:54:02,094 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:54:02,094 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [315434157] [2022-01-10 06:54:02,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:54:02,095 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:54:02,095 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:54:02,117 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:54:02,118 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2022-01-10 06:54:02,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:54:02,177 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 3 conjunts are in the unsatisfiable core [2022-01-10 06:54:02,178 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:54:02,278 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 06:54:02,278 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:54:02,278 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:54:02,278 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [315434157] [2022-01-10 06:54:02,279 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [315434157] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:54:02,279 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:54:02,279 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 06:54:02,279 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1192136158] [2022-01-10 06:54:02,279 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:54:02,279 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-10 06:54:02,279 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:54:02,280 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-10 06:54:02,280 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-10 06:54:02,280 INFO L87 Difference]: Start difference. First operand 8840 states and 13610 transitions. Second operand has 4 states, 4 states have (on average 19.25) internal successors, (77), 4 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 06:54:02,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:54:02,418 INFO L93 Difference]: Finished difference Result 16271 states and 25061 transitions. [2022-01-10 06:54:02,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-10 06:54:02,418 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 19.25) internal successors, (77), 4 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 77 [2022-01-10 06:54:02,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:54:02,431 INFO L225 Difference]: With dead ends: 16271 [2022-01-10 06:54:02,431 INFO L226 Difference]: Without dead ends: 7474 [2022-01-10 06:54:02,439 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-10 06:54:02,439 INFO L933 BasicCegarLoop]: 235 mSDtfsCounter, 45 mSDsluCounter, 401 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 636 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 06:54:02,439 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 636 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 06:54:02,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7474 states. [2022-01-10 06:54:02,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7474 to 7474. [2022-01-10 06:54:02,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7474 states, 7473 states have (on average 1.5398099826040412) internal successors, (11507), 7473 states have internal predecessors, (11507), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 06:54:02,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7474 states to 7474 states and 11507 transitions. [2022-01-10 06:54:02,558 INFO L78 Accepts]: Start accepts. Automaton has 7474 states and 11507 transitions. Word has length 77 [2022-01-10 06:54:02,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:54:02,558 INFO L470 AbstractCegarLoop]: Abstraction has 7474 states and 11507 transitions. [2022-01-10 06:54:02,558 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.25) internal successors, (77), 4 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 06:54:02,558 INFO L276 IsEmpty]: Start isEmpty. Operand 7474 states and 11507 transitions. [2022-01-10 06:54:02,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-01-10 06:54:02,559 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:54:02,559 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:54:02,577 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2022-01-10 06:54:02,766 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 06:54:02,767 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:54:02,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:54:02,767 INFO L85 PathProgramCache]: Analyzing trace with hash -1809048517, now seen corresponding path program 1 times [2022-01-10 06:54:02,767 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:54:02,767 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1715327308] [2022-01-10 06:54:02,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:54:02,770 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:54:02,771 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:54:02,772 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:54:02,780 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2022-01-10 06:54:02,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:54:02,842 INFO L263 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-10 06:54:02,844 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:54:02,973 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 06:54:02,973 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:54:02,973 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:54:02,973 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1715327308] [2022-01-10 06:54:02,973 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1715327308] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:54:02,973 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:54:02,974 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 06:54:02,974 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2039738814] [2022-01-10 06:54:02,974 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:54:02,974 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 06:54:02,974 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:54:02,974 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 06:54:02,974 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 06:54:02,975 INFO L87 Difference]: Start difference. First operand 7474 states and 11507 transitions. Second operand has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 3 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 06:54:03,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:54:03,172 INFO L93 Difference]: Finished difference Result 20502 states and 32005 transitions. [2022-01-10 06:54:03,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 06:54:03,173 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 3 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 80 [2022-01-10 06:54:03,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:54:03,199 INFO L225 Difference]: With dead ends: 20502 [2022-01-10 06:54:03,199 INFO L226 Difference]: Without dead ends: 13508 [2022-01-10 06:54:03,207 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 06:54:03,207 INFO L933 BasicCegarLoop]: 201 mSDtfsCounter, 97 mSDsluCounter, 170 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 371 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 06:54:03,208 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [97 Valid, 371 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 06:54:03,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13508 states. [2022-01-10 06:54:03,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13508 to 13506. [2022-01-10 06:54:03,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13506 states, 13505 states have (on average 1.5480932987782303) internal successors, (20907), 13505 states have internal predecessors, (20907), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 06:54:03,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13506 states to 13506 states and 20907 transitions. [2022-01-10 06:54:03,538 INFO L78 Accepts]: Start accepts. Automaton has 13506 states and 20907 transitions. Word has length 80 [2022-01-10 06:54:03,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:54:03,538 INFO L470 AbstractCegarLoop]: Abstraction has 13506 states and 20907 transitions. [2022-01-10 06:54:03,538 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 3 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 06:54:03,539 INFO L276 IsEmpty]: Start isEmpty. Operand 13506 states and 20907 transitions. [2022-01-10 06:54:03,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2022-01-10 06:54:03,540 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:54:03,540 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:54:03,553 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (20)] Ended with exit code 0 [2022-01-10 06:54:03,747 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 06:54:03,747 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:54:03,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:54:03,748 INFO L85 PathProgramCache]: Analyzing trace with hash 1474971408, now seen corresponding path program 1 times [2022-01-10 06:54:03,748 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:54:03,748 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [857220348] [2022-01-10 06:54:03,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:54:03,749 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:54:03,749 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:54:03,750 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:54:03,752 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2022-01-10 06:54:03,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:54:03,855 INFO L263 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-10 06:54:03,857 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:54:04,011 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 06:54:04,011 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:54:04,012 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:54:04,012 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [857220348] [2022-01-10 06:54:04,012 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [857220348] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:54:04,012 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:54:04,012 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 06:54:04,012 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1250914603] [2022-01-10 06:54:04,012 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:54:04,012 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 06:54:04,013 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:54:04,013 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 06:54:04,013 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 06:54:04,013 INFO L87 Difference]: Start difference. First operand 13506 states and 20907 transitions. Second operand has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 06:54:04,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:54:04,319 INFO L93 Difference]: Finished difference Result 34383 states and 53338 transitions. [2022-01-10 06:54:04,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 06:54:04,319 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 82 [2022-01-10 06:54:04,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:54:04,370 INFO L225 Difference]: With dead ends: 34383 [2022-01-10 06:54:04,371 INFO L226 Difference]: Without dead ends: 21357 [2022-01-10 06:54:04,394 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 06:54:04,397 INFO L933 BasicCegarLoop]: 347 mSDtfsCounter, 120 mSDsluCounter, 186 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 120 SdHoareTripleChecker+Valid, 533 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 06:54:04,397 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [120 Valid, 533 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 06:54:04,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21357 states. [2022-01-10 06:54:04,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21357 to 21355. [2022-01-10 06:54:04,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21355 states, 21354 states have (on average 1.5288938840498267) internal successors, (32648), 21354 states have internal predecessors, (32648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 06:54:04,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21355 states to 21355 states and 32648 transitions. [2022-01-10 06:54:04,917 INFO L78 Accepts]: Start accepts. Automaton has 21355 states and 32648 transitions. Word has length 82 [2022-01-10 06:54:04,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:54:04,917 INFO L470 AbstractCegarLoop]: Abstraction has 21355 states and 32648 transitions. [2022-01-10 06:54:04,917 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 06:54:04,918 INFO L276 IsEmpty]: Start isEmpty. Operand 21355 states and 32648 transitions. [2022-01-10 06:54:04,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2022-01-10 06:54:04,919 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:54:04,919 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:54:04,927 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2022-01-10 06:54:05,127 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 06:54:05,128 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:54:05,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:54:05,128 INFO L85 PathProgramCache]: Analyzing trace with hash -1591980634, now seen corresponding path program 1 times [2022-01-10 06:54:05,128 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:54:05,128 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1438140578] [2022-01-10 06:54:05,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:54:05,129 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:54:05,129 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:54:05,130 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:54:05,131 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2022-01-10 06:54:05,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:54:05,276 INFO L263 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 3 conjunts are in the unsatisfiable core [2022-01-10 06:54:05,277 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:54:05,413 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 06:54:05,413 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:54:05,413 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:54:05,413 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1438140578] [2022-01-10 06:54:05,413 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1438140578] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:54:05,413 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:54:05,414 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 06:54:05,414 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [331996425] [2022-01-10 06:54:05,414 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:54:05,414 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-10 06:54:05,414 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:54:05,414 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-10 06:54:05,414 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-10 06:54:05,415 INFO L87 Difference]: Start difference. First operand 21355 states and 32648 transitions. Second operand has 4 states, 4 states have (on average 20.5) internal successors, (82), 4 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 06:54:05,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:54:05,711 INFO L93 Difference]: Finished difference Result 43789 states and 66806 transitions. [2022-01-10 06:54:05,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-10 06:54:05,712 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 20.5) internal successors, (82), 4 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 82 [2022-01-10 06:54:05,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:54:05,741 INFO L225 Difference]: With dead ends: 43789 [2022-01-10 06:54:05,741 INFO L226 Difference]: Without dead ends: 22519 [2022-01-10 06:54:05,759 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-10 06:54:05,760 INFO L933 BasicCegarLoop]: 207 mSDtfsCounter, 455 mSDsluCounter, 180 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 455 SdHoareTripleChecker+Valid, 387 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 06:54:05,760 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [455 Valid, 387 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 06:54:05,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22519 states. [2022-01-10 06:54:06,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22519 to 21447. [2022-01-10 06:54:06,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21447 states, 21446 states have (on average 1.5261120954956635) internal successors, (32729), 21446 states have internal predecessors, (32729), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 06:54:06,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21447 states to 21447 states and 32729 transitions. [2022-01-10 06:54:06,314 INFO L78 Accepts]: Start accepts. Automaton has 21447 states and 32729 transitions. Word has length 82 [2022-01-10 06:54:06,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:54:06,314 INFO L470 AbstractCegarLoop]: Abstraction has 21447 states and 32729 transitions. [2022-01-10 06:54:06,314 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.5) internal successors, (82), 4 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 06:54:06,315 INFO L276 IsEmpty]: Start isEmpty. Operand 21447 states and 32729 transitions. [2022-01-10 06:54:06,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2022-01-10 06:54:06,317 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:54:06,317 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:54:06,337 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2022-01-10 06:54:06,525 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 06:54:06,525 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:54:06,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:54:06,525 INFO L85 PathProgramCache]: Analyzing trace with hash 2038858181, now seen corresponding path program 1 times [2022-01-10 06:54:06,526 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:54:06,526 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [297475666] [2022-01-10 06:54:06,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:54:06,526 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:54:06,526 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:54:06,527 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:54:06,555 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2022-01-10 06:54:06,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:54:06,656 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-10 06:54:06,658 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:54:06,794 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 06:54:06,794 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:54:06,795 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:54:06,795 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [297475666] [2022-01-10 06:54:06,795 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [297475666] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:54:06,795 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:54:06,795 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 06:54:06,795 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2010054673] [2022-01-10 06:54:06,795 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:54:06,795 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 06:54:06,795 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:54:06,796 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 06:54:06,796 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 06:54:06,796 INFO L87 Difference]: Start difference. First operand 21447 states and 32729 transitions. Second operand has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 3 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 06:54:07,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:54:07,432 INFO L93 Difference]: Finished difference Result 52011 states and 79863 transitions. [2022-01-10 06:54:07,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 06:54:07,434 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 3 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 83 [2022-01-10 06:54:07,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:54:07,480 INFO L225 Difference]: With dead ends: 52011 [2022-01-10 06:54:07,481 INFO L226 Difference]: Without dead ends: 31289 [2022-01-10 06:54:07,503 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 06:54:07,504 INFO L933 BasicCegarLoop]: 219 mSDtfsCounter, 103 mSDsluCounter, 184 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 403 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 06:54:07,504 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [103 Valid, 403 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 06:54:07,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31289 states. [2022-01-10 06:54:08,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31289 to 30359. [2022-01-10 06:54:08,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30359 states, 30358 states have (on average 1.5140984254562224) internal successors, (45965), 30358 states have internal predecessors, (45965), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 06:54:08,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30359 states to 30359 states and 45965 transitions. [2022-01-10 06:54:08,374 INFO L78 Accepts]: Start accepts. Automaton has 30359 states and 45965 transitions. Word has length 83 [2022-01-10 06:54:08,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:54:08,374 INFO L470 AbstractCegarLoop]: Abstraction has 30359 states and 45965 transitions. [2022-01-10 06:54:08,375 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 3 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 06:54:08,375 INFO L276 IsEmpty]: Start isEmpty. Operand 30359 states and 45965 transitions. [2022-01-10 06:54:08,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2022-01-10 06:54:08,376 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:54:08,376 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:54:08,383 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (23)] Ended with exit code 0 [2022-01-10 06:54:08,582 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 06:54:08,583 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:54:08,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:54:08,583 INFO L85 PathProgramCache]: Analyzing trace with hash -1289837698, now seen corresponding path program 1 times [2022-01-10 06:54:08,583 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:54:08,584 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [702496938] [2022-01-10 06:54:08,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:54:08,584 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:54:08,584 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:54:08,585 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:54:08,586 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2022-01-10 06:54:08,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:54:08,669 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 3 conjunts are in the unsatisfiable core [2022-01-10 06:54:08,670 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:54:08,776 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 06:54:08,777 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:54:08,777 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:54:08,777 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [702496938] [2022-01-10 06:54:08,777 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [702496938] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:54:08,777 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:54:08,777 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 06:54:08,777 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1736973147] [2022-01-10 06:54:08,777 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:54:08,778 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-10 06:54:08,778 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:54:08,778 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-10 06:54:08,778 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-10 06:54:08,778 INFO L87 Difference]: Start difference. First operand 30359 states and 45965 transitions. Second operand has 4 states, 4 states have (on average 20.75) internal successors, (83), 4 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 06:54:09,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:54:09,605 INFO L93 Difference]: Finished difference Result 76417 states and 115632 transitions. [2022-01-10 06:54:09,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-10 06:54:09,605 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 20.75) internal successors, (83), 4 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 83 [2022-01-10 06:54:09,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:54:09,665 INFO L225 Difference]: With dead ends: 76417 [2022-01-10 06:54:09,665 INFO L226 Difference]: Without dead ends: 46198 [2022-01-10 06:54:09,689 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-10 06:54:09,689 INFO L933 BasicCegarLoop]: 216 mSDtfsCounter, 519 mSDsluCounter, 181 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 519 SdHoareTripleChecker+Valid, 397 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 06:54:09,690 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [519 Valid, 397 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 06:54:09,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46198 states. [2022-01-10 06:54:10,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46198 to 46196. [2022-01-10 06:54:10,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46196 states, 46195 states have (on average 1.4946639246671718) internal successors, (69046), 46195 states have internal predecessors, (69046), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 06:54:10,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46196 states to 46196 states and 69046 transitions. [2022-01-10 06:54:10,863 INFO L78 Accepts]: Start accepts. Automaton has 46196 states and 69046 transitions. Word has length 83 [2022-01-10 06:54:10,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:54:10,864 INFO L470 AbstractCegarLoop]: Abstraction has 46196 states and 69046 transitions. [2022-01-10 06:54:10,864 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.75) internal successors, (83), 4 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 06:54:10,864 INFO L276 IsEmpty]: Start isEmpty. Operand 46196 states and 69046 transitions. [2022-01-10 06:54:10,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2022-01-10 06:54:10,866 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:54:10,866 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:54:10,873 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (24)] Forceful destruction successful, exit code 0 [2022-01-10 06:54:11,073 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 06:54:11,073 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:54:11,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:54:11,074 INFO L85 PathProgramCache]: Analyzing trace with hash -1071950370, now seen corresponding path program 1 times [2022-01-10 06:54:11,174 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:54:11,174 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1331063798] [2022-01-10 06:54:11,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:54:11,174 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:54:11,174 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:54:11,198 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:54:11,199 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2022-01-10 06:54:11,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:54:11,258 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-10 06:54:11,260 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:54:11,373 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 06:54:11,374 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:54:11,374 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:54:11,374 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1331063798] [2022-01-10 06:54:11,374 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1331063798] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:54:11,374 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:54:11,374 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 06:54:11,374 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [608003656] [2022-01-10 06:54:11,374 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:54:11,374 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 06:54:11,374 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:54:11,375 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 06:54:11,375 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 06:54:11,375 INFO L87 Difference]: Start difference. First operand 46196 states and 69046 transitions. Second operand has 3 states, 3 states have (on average 28.0) internal successors, (84), 3 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 06:54:12,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:54:12,425 INFO L93 Difference]: Finished difference Result 88915 states and 133936 transitions. [2022-01-10 06:54:12,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 06:54:12,425 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 28.0) internal successors, (84), 3 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 84 [2022-01-10 06:54:12,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:54:12,520 INFO L225 Difference]: With dead ends: 88915 [2022-01-10 06:54:12,520 INFO L226 Difference]: Without dead ends: 58969 [2022-01-10 06:54:12,545 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 06:54:12,546 INFO L933 BasicCegarLoop]: 267 mSDtfsCounter, 98 mSDsluCounter, 171 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 438 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 06:54:12,546 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [98 Valid, 438 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 06:54:12,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58969 states. [2022-01-10 06:54:13,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58969 to 58967. [2022-01-10 06:54:13,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58967 states, 58966 states have (on average 1.4951836651629753) internal successors, (88165), 58966 states have internal predecessors, (88165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 06:54:14,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58967 states to 58967 states and 88165 transitions. [2022-01-10 06:54:14,026 INFO L78 Accepts]: Start accepts. Automaton has 58967 states and 88165 transitions. Word has length 84 [2022-01-10 06:54:14,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:54:14,026 INFO L470 AbstractCegarLoop]: Abstraction has 58967 states and 88165 transitions. [2022-01-10 06:54:14,026 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.0) internal successors, (84), 3 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 06:54:14,026 INFO L276 IsEmpty]: Start isEmpty. Operand 58967 states and 88165 transitions. [2022-01-10 06:54:14,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2022-01-10 06:54:14,029 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:54:14,029 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:54:14,041 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (25)] Forceful destruction successful, exit code 0 [2022-01-10 06:54:14,239 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 06:54:14,239 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:54:14,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:54:14,239 INFO L85 PathProgramCache]: Analyzing trace with hash -333008699, now seen corresponding path program 1 times [2022-01-10 06:54:14,240 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:54:14,240 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2017639032] [2022-01-10 06:54:14,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:54:14,240 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:54:14,240 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:54:14,241 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:54:14,242 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2022-01-10 06:54:14,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:54:14,303 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 3 conjunts are in the unsatisfiable core [2022-01-10 06:54:14,304 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:54:14,413 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 06:54:14,413 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:54:14,413 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:54:14,413 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2017639032] [2022-01-10 06:54:14,413 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2017639032] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:54:14,413 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:54:14,413 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 06:54:14,414 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1532689241] [2022-01-10 06:54:14,414 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:54:14,414 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-10 06:54:14,414 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:54:14,414 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-10 06:54:14,414 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-10 06:54:14,415 INFO L87 Difference]: Start difference. First operand 58967 states and 88165 transitions. Second operand has 4 states, 4 states have (on average 21.25) internal successors, (85), 4 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 06:54:15,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:54:15,460 INFO L93 Difference]: Finished difference Result 85438 states and 127569 transitions. [2022-01-10 06:54:15,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-10 06:54:15,460 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 21.25) internal successors, (85), 4 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 85 [2022-01-10 06:54:15,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:54:15,538 INFO L225 Difference]: With dead ends: 85438 [2022-01-10 06:54:15,538 INFO L226 Difference]: Without dead ends: 52597 [2022-01-10 06:54:15,554 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-10 06:54:15,555 INFO L933 BasicCegarLoop]: 219 mSDtfsCounter, 23 mSDsluCounter, 392 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 611 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 06:54:15,555 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 611 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 06:54:15,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52597 states. [2022-01-10 06:54:16,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52597 to 52597. [2022-01-10 06:54:16,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52597 states, 52596 states have (on average 1.4937067457601338) internal successors, (78563), 52596 states have internal predecessors, (78563), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 06:54:16,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52597 states to 52597 states and 78563 transitions. [2022-01-10 06:54:16,812 INFO L78 Accepts]: Start accepts. Automaton has 52597 states and 78563 transitions. Word has length 85 [2022-01-10 06:54:16,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:54:16,812 INFO L470 AbstractCegarLoop]: Abstraction has 52597 states and 78563 transitions. [2022-01-10 06:54:16,812 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.25) internal successors, (85), 4 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 06:54:16,812 INFO L276 IsEmpty]: Start isEmpty. Operand 52597 states and 78563 transitions. [2022-01-10 06:54:16,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2022-01-10 06:54:16,815 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:54:16,815 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:54:16,848 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (26)] Ended with exit code 0 [2022-01-10 06:54:17,020 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 06:54:17,020 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:54:17,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:54:17,021 INFO L85 PathProgramCache]: Analyzing trace with hash 1022839429, now seen corresponding path program 1 times [2022-01-10 06:54:17,021 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:54:17,021 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [561388196] [2022-01-10 06:54:17,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:54:17,021 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:54:17,022 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:54:17,023 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:54:17,024 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2022-01-10 06:54:17,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:54:17,093 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-10 06:54:17,095 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:54:17,496 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 06:54:17,496 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:54:17,496 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:54:17,496 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [561388196] [2022-01-10 06:54:17,496 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [561388196] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:54:17,497 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:54:17,497 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-10 06:54:17,497 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [88556701] [2022-01-10 06:54:17,497 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:54:17,497 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 06:54:17,497 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:54:17,498 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 06:54:17,498 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-01-10 06:54:17,498 INFO L87 Difference]: Start difference. First operand 52597 states and 78563 transitions. Second operand has 5 states, 5 states have (on average 17.4) internal successors, (87), 5 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 06:54:20,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:54:20,763 INFO L93 Difference]: Finished difference Result 218589 states and 330415 transitions. [2022-01-10 06:54:20,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-10 06:54:20,764 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 17.4) internal successors, (87), 5 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 87 [2022-01-10 06:54:20,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:54:21,130 INFO L225 Difference]: With dead ends: 218589 [2022-01-10 06:54:21,130 INFO L226 Difference]: Without dead ends: 167131 [2022-01-10 06:54:21,195 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-01-10 06:54:21,198 INFO L933 BasicCegarLoop]: 199 mSDtfsCounter, 507 mSDsluCounter, 567 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 507 SdHoareTripleChecker+Valid, 766 SdHoareTripleChecker+Invalid, 64 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 06:54:21,200 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [507 Valid, 766 Invalid, 64 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-10 06:54:21,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167131 states. [2022-01-10 06:54:24,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167131 to 138265. [2022-01-10 06:54:25,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138265 states, 138264 states have (on average 1.483871434357461) internal successors, (205166), 138264 states have internal predecessors, (205166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 06:54:25,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138265 states to 138265 states and 205166 transitions. [2022-01-10 06:54:25,537 INFO L78 Accepts]: Start accepts. Automaton has 138265 states and 205166 transitions. Word has length 87 [2022-01-10 06:54:25,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:54:25,538 INFO L470 AbstractCegarLoop]: Abstraction has 138265 states and 205166 transitions. [2022-01-10 06:54:25,538 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 17.4) internal successors, (87), 5 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 06:54:25,538 INFO L276 IsEmpty]: Start isEmpty. Operand 138265 states and 205166 transitions. [2022-01-10 06:54:25,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2022-01-10 06:54:25,540 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:54:25,541 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:54:25,547 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (27)] Forceful destruction successful, exit code 0 [2022-01-10 06:54:25,747 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 06:54:25,774 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:54:25,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:54:25,774 INFO L85 PathProgramCache]: Analyzing trace with hash -279581361, now seen corresponding path program 1 times [2022-01-10 06:54:25,774 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:54:25,774 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2096548281] [2022-01-10 06:54:25,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:54:25,776 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:54:25,776 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:54:25,777 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:54:25,778 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (28)] Waiting until timeout for monitored process [2022-01-10 06:54:25,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:54:25,860 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 3 conjunts are in the unsatisfiable core [2022-01-10 06:54:25,862 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:54:26,125 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 06:54:26,125 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:54:26,125 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:54:26,126 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2096548281] [2022-01-10 06:54:26,126 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2096548281] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:54:26,126 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:54:26,126 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 06:54:26,126 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [961528963] [2022-01-10 06:54:26,126 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:54:26,126 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-10 06:54:26,126 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:54:26,126 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-10 06:54:26,126 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-01-10 06:54:26,127 INFO L87 Difference]: Start difference. First operand 138265 states and 205166 transitions. Second operand has 4 states, 4 states have (on average 22.0) internal successors, (88), 4 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 06:54:31,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:54:31,605 INFO L93 Difference]: Finished difference Result 400727 states and 600373 transitions. [2022-01-10 06:54:31,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-10 06:54:31,606 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 22.0) internal successors, (88), 4 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 88 [2022-01-10 06:54:31,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:54:32,342 INFO L225 Difference]: With dead ends: 400727 [2022-01-10 06:54:32,343 INFO L226 Difference]: Without dead ends: 263601 [2022-01-10 06:54:32,432 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-01-10 06:54:32,432 INFO L933 BasicCegarLoop]: 200 mSDtfsCounter, 377 mSDsluCounter, 293 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 377 SdHoareTripleChecker+Valid, 493 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 06:54:32,432 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [377 Valid, 493 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 06:54:32,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 263601 states. [2022-01-10 06:54:38,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 263601 to 234017. [2022-01-10 06:54:38,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 234017 states, 234016 states have (on average 1.4843856830302202) internal successors, (347370), 234016 states have internal predecessors, (347370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 06:54:39,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234017 states to 234017 states and 347370 transitions. [2022-01-10 06:54:39,520 INFO L78 Accepts]: Start accepts. Automaton has 234017 states and 347370 transitions. Word has length 88 [2022-01-10 06:54:39,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:54:39,520 INFO L470 AbstractCegarLoop]: Abstraction has 234017 states and 347370 transitions. [2022-01-10 06:54:39,520 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 22.0) internal successors, (88), 4 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 06:54:39,520 INFO L276 IsEmpty]: Start isEmpty. Operand 234017 states and 347370 transitions. [2022-01-10 06:54:39,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2022-01-10 06:54:39,522 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:54:39,522 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:54:39,530 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (28)] Forceful destruction successful, exit code 0 [2022-01-10 06:54:39,728 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 06:54:39,729 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:54:39,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:54:39,729 INFO L85 PathProgramCache]: Analyzing trace with hash -1830915844, now seen corresponding path program 1 times [2022-01-10 06:54:39,729 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:54:39,729 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1076727994] [2022-01-10 06:54:39,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:54:39,730 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:54:39,730 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:54:39,731 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:54:39,732 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (29)] Waiting until timeout for monitored process [2022-01-10 06:54:39,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:54:39,797 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 3 conjunts are in the unsatisfiable core [2022-01-10 06:54:39,813 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:54:40,010 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 06:54:40,010 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:54:40,010 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:54:40,010 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1076727994] [2022-01-10 06:54:40,010 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1076727994] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:54:40,010 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:54:40,010 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 06:54:40,010 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1832896150] [2022-01-10 06:54:40,010 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:54:40,011 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-10 06:54:40,011 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:54:40,011 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-10 06:54:40,011 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-01-10 06:54:40,011 INFO L87 Difference]: Start difference. First operand 234017 states and 347370 transitions. Second operand has 4 states, 4 states have (on average 22.25) internal successors, (89), 4 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 06:54:49,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:54:49,578 INFO L93 Difference]: Finished difference Result 640801 states and 955226 transitions. [2022-01-10 06:54:49,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-10 06:54:49,579 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 22.25) internal successors, (89), 4 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 89 [2022-01-10 06:54:49,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:54:50,785 INFO L225 Difference]: With dead ends: 640801 [2022-01-10 06:54:50,785 INFO L226 Difference]: Without dead ends: 407923 [2022-01-10 06:54:51,122 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-01-10 06:54:51,122 INFO L933 BasicCegarLoop]: 188 mSDtfsCounter, 275 mSDsluCounter, 462 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 275 SdHoareTripleChecker+Valid, 650 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 06:54:51,123 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [275 Valid, 650 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-10 06:54:51,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 407923 states.