/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/array-fpi/nsqm.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-a10ec3b [2022-01-10 04:05:42,582 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-10 04:05:42,584 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-10 04:05:42,647 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-01-10 04:05:42,653 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-01-10 04:05:42,654 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-01-10 04:05:42,655 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-01-10 04:05:42,656 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-01-10 04:05:42,656 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-01-10 04:05:42,657 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-01-10 04:05:42,658 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-01-10 04:05:42,659 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-01-10 04:05:42,660 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-01-10 04:05:42,668 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-01-10 04:05:42,671 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-01-10 04:05:42,672 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-01-10 04:05:42,675 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-01-10 04:05:42,679 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-10 04:05:42,680 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-10 04:05:42,680 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-10 04:05:42,685 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 04:05:42,706 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-10 04:05:42,706 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-10 04:05:42,707 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-01-10 04:05:42,707 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-01-10 04:05:42,710 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-01-10 04:05:42,710 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-01-10 04:05:42,710 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-01-10 04:05:42,710 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-01-10 04:05:42,711 INFO L138 SettingsManager]: * Use SBE=true [2022-01-10 04:05:42,711 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-10 04:05:42,711 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-10 04:05:42,711 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-10 04:05:42,711 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-10 04:05:42,712 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-10 04:05:42,712 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-10 04:05:42,712 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-01-10 04:05:42,712 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-01-10 04:05:42,712 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-01-10 04:05:42,712 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-10 04:05:42,712 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-10 04:05:42,712 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-10 04:05:42,712 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-10 04:05:42,712 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-10 04:05:42,713 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-10 04:05:42,714 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-10 04:05:42,714 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-01-10 04:05:42,714 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-01-10 04:05:42,714 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2022-01-10 04:05:42,714 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-01-10 04:05:42,714 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-01-10 04:05:42,714 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-01-10 04:05:42,715 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-01-10 04:05:42,715 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-01-10 04:05:42,715 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-10 04:05:42,847 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-10 04:05:42,859 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-10 04:05:42,861 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-10 04:05:42,861 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-10 04:05:42,862 INFO L275 PluginConnector]: CDTParser initialized [2022-01-10 04:05:42,862 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-fpi/nsqm.c [2022-01-10 04:05:42,895 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/75ed12c60/8995cf1669a64a76ad01d24fca7a08c4/FLAGdce962bab [2022-01-10 04:05:43,244 INFO L306 CDTParser]: Found 1 translation units. [2022-01-10 04:05:43,244 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-fpi/nsqm.c [2022-01-10 04:05:43,248 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/75ed12c60/8995cf1669a64a76ad01d24fca7a08c4/FLAGdce962bab [2022-01-10 04:05:43,258 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/75ed12c60/8995cf1669a64a76ad01d24fca7a08c4 [2022-01-10 04:05:43,260 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-10 04:05:43,261 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-01-10 04:05:43,262 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-10 04:05:43,262 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-10 04:05:43,264 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-10 04:05:43,265 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 04:05:43" (1/1) ... [2022-01-10 04:05:43,265 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1fbf2883 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 04:05:43, skipping insertion in model container [2022-01-10 04:05:43,265 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 04:05:43" (1/1) ... [2022-01-10 04:05:43,270 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-10 04:05:43,278 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-10 04:05:43,434 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/array-fpi/nsqm.c[587,600] [2022-01-10 04:05:43,455 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-10 04:05:43,465 INFO L203 MainTranslator]: Completed pre-run [2022-01-10 04:05:43,477 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/array-fpi/nsqm.c[587,600] [2022-01-10 04:05:43,490 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-10 04:05:43,501 INFO L208 MainTranslator]: Completed translation [2022-01-10 04:05:43,502 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 04:05:43 WrapperNode [2022-01-10 04:05:43,502 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-10 04:05:43,502 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-01-10 04:05:43,502 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-01-10 04:05:43,503 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-01-10 04:05:43,506 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 04:05:43" (1/1) ... [2022-01-10 04:05:43,518 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 04:05:43" (1/1) ... [2022-01-10 04:05:43,535 INFO L137 Inliner]: procedures = 18, calls = 26, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 78 [2022-01-10 04:05:43,535 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-01-10 04:05:43,536 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-10 04:05:43,536 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-10 04:05:43,536 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-10 04:05:43,541 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 04:05:43" (1/1) ... [2022-01-10 04:05:43,541 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 04:05:43" (1/1) ... [2022-01-10 04:05:43,546 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 04:05:43" (1/1) ... [2022-01-10 04:05:43,546 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 04:05:43" (1/1) ... [2022-01-10 04:05:43,571 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 04:05:43" (1/1) ... [2022-01-10 04:05:43,573 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 04:05:43" (1/1) ... [2022-01-10 04:05:43,574 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 04:05:43" (1/1) ... [2022-01-10 04:05:43,575 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-10 04:05:43,575 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-10 04:05:43,575 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-10 04:05:43,575 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-10 04:05:43,577 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 04:05:43" (1/1) ... [2022-01-10 04:05:43,585 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-10 04:05:43,592 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 04:05:43,612 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 04:05:43,623 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 04:05:43,635 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-10 04:05:43,635 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-01-10 04:05:43,635 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE8 [2022-01-10 04:05:43,635 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-01-10 04:05:43,635 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-10 04:05:43,636 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-10 04:05:43,636 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE8 [2022-01-10 04:05:43,679 INFO L234 CfgBuilder]: Building ICFG [2022-01-10 04:05:43,680 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-10 04:05:43,997 INFO L275 CfgBuilder]: Performing block encoding [2022-01-10 04:05:44,001 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-10 04:05:44,001 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2022-01-10 04:05:44,002 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 04:05:44 BoogieIcfgContainer [2022-01-10 04:05:44,002 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-10 04:05:44,004 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-10 04:05:44,004 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-10 04:05:44,006 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-10 04:05:44,006 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 10.01 04:05:43" (1/3) ... [2022-01-10 04:05:44,007 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2dcafff2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 04:05:44, skipping insertion in model container [2022-01-10 04:05:44,007 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 04:05:43" (2/3) ... [2022-01-10 04:05:44,007 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2dcafff2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 04:05:44, skipping insertion in model container [2022-01-10 04:05:44,007 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 04:05:44" (3/3) ... [2022-01-10 04:05:44,008 INFO L111 eAbstractionObserver]: Analyzing ICFG nsqm.c [2022-01-10 04:05:44,012 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-01-10 04:05:44,012 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-10 04:05:44,054 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-10 04:05:44,060 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 04:05:44,061 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-01-10 04:05:44,071 INFO L276 IsEmpty]: Start isEmpty. Operand has 21 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 04:05:44,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-01-10 04:05:44,074 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 04:05:44,075 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 04:05:44,075 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 04:05:44,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 04:05:44,080 INFO L85 PathProgramCache]: Analyzing trace with hash -1828546148, now seen corresponding path program 1 times [2022-01-10 04:05:44,088 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 04:05:44,088 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [230847873] [2022-01-10 04:05:44,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 04:05:44,089 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 04:05:44,089 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 04:05:44,091 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 04:05:44,095 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 04:05:44,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 04:05:44,198 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 1 conjunts are in the unsatisfiable core [2022-01-10 04:05:44,201 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 04:05:44,245 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 04:05:44,245 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 04:05:44,246 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 04:05:44,246 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [230847873] [2022-01-10 04:05:44,246 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [230847873] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 04:05:44,247 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 04:05:44,247 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-01-10 04:05:44,248 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1065378902] [2022-01-10 04:05:44,249 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 04:05:44,252 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-01-10 04:05:44,252 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 04:05:44,276 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-01-10 04:05:44,276 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-01-10 04:05:44,278 INFO L87 Difference]: Start difference. First operand has 21 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 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 6.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 04:05:44,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 04:05:44,289 INFO L93 Difference]: Finished difference Result 38 states and 52 transitions. [2022-01-10 04:05:44,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-01-10 04:05:44,291 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 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 12 [2022-01-10 04:05:44,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 04:05:44,296 INFO L225 Difference]: With dead ends: 38 [2022-01-10 04:05:44,296 INFO L226 Difference]: Without dead ends: 17 [2022-01-10 04:05:44,298 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 11 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 04:05:44,301 INFO L933 BasicCegarLoop]: 24 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, 24 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 04:05:44,303 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 04:05:44,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2022-01-10 04:05:44,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2022-01-10 04:05:44,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 16 states have (on average 1.1875) internal successors, (19), 16 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 04:05:44,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 19 transitions. [2022-01-10 04:05:44,324 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 19 transitions. Word has length 12 [2022-01-10 04:05:44,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 04:05:44,324 INFO L470 AbstractCegarLoop]: Abstraction has 17 states and 19 transitions. [2022-01-10 04:05:44,325 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 04:05:44,325 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 19 transitions. [2022-01-10 04:05:44,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-01-10 04:05:44,325 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 04:05:44,325 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 04:05:44,347 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Ended with exit code 0 [2022-01-10 04:05:44,533 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 04:05:44,534 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 04:05:44,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 04:05:44,535 INFO L85 PathProgramCache]: Analyzing trace with hash -1148487778, now seen corresponding path program 1 times [2022-01-10 04:05:44,538 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 04:05:44,538 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [561335644] [2022-01-10 04:05:44,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 04:05:44,539 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 04:05:44,539 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 04:05:44,540 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 04:05:44,541 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 04:05:44,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 04:05:44,686 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 17 conjunts are in the unsatisfiable core [2022-01-10 04:05:44,689 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 04:05:44,850 INFO L353 Elim1Store]: treesize reduction 52, result has 26.8 percent of original size [2022-01-10 04:05:44,851 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 62 treesize of output 77 [2022-01-10 04:05:44,864 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-10 04:05:44,866 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-10 04:05:44,874 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 25 [2022-01-10 04:05:44,889 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-10 04:05:44,892 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-10 04:05:44,899 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 25 [2022-01-10 04:05:45,143 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-10 04:05:45,145 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 15 [2022-01-10 04:05:45,237 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 26 [2022-01-10 04:05:45,249 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-10 04:05:45,250 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 15 [2022-01-10 04:05:45,550 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-10 04:05:45,550 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 65 treesize of output 41 [2022-01-10 04:05:45,583 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 04:05:45,584 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 04:05:45,584 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 04:05:45,584 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [561335644] [2022-01-10 04:05:45,584 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [561335644] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 04:05:45,585 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 04:05:45,586 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-01-10 04:05:45,586 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [479034642] [2022-01-10 04:05:45,586 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 04:05:45,587 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-01-10 04:05:45,587 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 04:05:45,589 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-01-10 04:05:45,590 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-01-10 04:05:45,591 INFO L87 Difference]: Start difference. First operand 17 states and 19 transitions. Second operand has 8 states, 8 states have (on average 1.5) internal successors, (12), 8 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 04:05:46,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 04:05:46,347 INFO L93 Difference]: Finished difference Result 35 states and 41 transitions. [2022-01-10 04:05:46,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-10 04:05:46,349 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.5) internal successors, (12), 8 states have internal predecessors, (12), 0 states have call successors, (0), 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 12 [2022-01-10 04:05:46,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 04:05:46,350 INFO L225 Difference]: With dead ends: 35 [2022-01-10 04:05:46,350 INFO L226 Difference]: Without dead ends: 18 [2022-01-10 04:05:46,350 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=61, Invalid=121, Unknown=0, NotChecked=0, Total=182 [2022-01-10 04:05:46,351 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 56 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-10 04:05:46,352 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [56 Valid, 32 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-10 04:05:46,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2022-01-10 04:05:46,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2022-01-10 04:05:46,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 17 states have (on average 1.1764705882352942) internal successors, (20), 17 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 04:05:46,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 20 transitions. [2022-01-10 04:05:46,355 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 20 transitions. Word has length 12 [2022-01-10 04:05:46,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 04:05:46,355 INFO L470 AbstractCegarLoop]: Abstraction has 18 states and 20 transitions. [2022-01-10 04:05:46,355 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 1.5) internal successors, (12), 8 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 04:05:46,355 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 20 transitions. [2022-01-10 04:05:46,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-01-10 04:05:46,356 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 04:05:46,356 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 04:05:46,367 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2022-01-10 04:05:46,565 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 04:05:46,565 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 04:05:46,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 04:05:46,566 INFO L85 PathProgramCache]: Analyzing trace with hash -1842440164, now seen corresponding path program 1 times [2022-01-10 04:05:46,566 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 04:05:46,566 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1925044225] [2022-01-10 04:05:46,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 04:05:46,567 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 04:05:46,567 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 04:05:46,568 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 04:05:46,569 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 04:05:46,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 04:05:46,634 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 10 conjunts are in the unsatisfiable core [2022-01-10 04:05:46,636 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 04:05:46,811 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 04:05:46,811 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 04:05:46,963 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 04:05:46,963 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 04:05:46,963 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1925044225] [2022-01-10 04:05:46,963 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1925044225] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 04:05:46,964 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 04:05:46,964 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7] total 14 [2022-01-10 04:05:46,964 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2097865353] [2022-01-10 04:05:46,964 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 04:05:46,964 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-01-10 04:05:46,964 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 04:05:46,965 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-01-10 04:05:46,965 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2022-01-10 04:05:46,965 INFO L87 Difference]: Start difference. First operand 18 states and 20 transitions. Second operand has 14 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 14 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 04:05:47,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 04:05:47,639 INFO L93 Difference]: Finished difference Result 47 states and 55 transitions. [2022-01-10 04:05:47,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-10 04:05:47,644 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 14 states have internal predecessors, (22), 0 states have call successors, (0), 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 14 [2022-01-10 04:05:47,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 04:05:47,645 INFO L225 Difference]: With dead ends: 47 [2022-01-10 04:05:47,645 INFO L226 Difference]: Without dead ends: 38 [2022-01-10 04:05:47,645 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=188, Invalid=412, Unknown=0, NotChecked=0, Total=600 [2022-01-10 04:05:47,646 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 155 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 155 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 142 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-10 04:05:47,647 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [155 Valid, 23 Invalid, 142 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-10 04:05:47,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2022-01-10 04:05:47,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 25. [2022-01-10 04:05:47,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 24 states have (on average 1.1666666666666667) internal successors, (28), 24 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 04:05:47,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 28 transitions. [2022-01-10 04:05:47,652 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 28 transitions. Word has length 14 [2022-01-10 04:05:47,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 04:05:47,652 INFO L470 AbstractCegarLoop]: Abstraction has 25 states and 28 transitions. [2022-01-10 04:05:47,652 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 14 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 04:05:47,652 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 28 transitions. [2022-01-10 04:05:47,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-01-10 04:05:47,653 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 04:05:47,653 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 04:05:47,664 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 04:05:47,864 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 04:05:47,864 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 04:05:47,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 04:05:47,865 INFO L85 PathProgramCache]: Analyzing trace with hash 586911962, now seen corresponding path program 1 times [2022-01-10 04:05:47,865 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 04:05:47,865 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1272635159] [2022-01-10 04:05:47,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 04:05:47,866 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 04:05:47,866 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 04:05:47,878 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 04:05:47,880 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 04:05:48,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 04:05:48,254 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-10 04:05:48,257 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 04:05:48,336 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 9 [2022-01-10 04:05:48,358 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-10 04:05:48,362 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 27 [2022-01-10 04:05:48,369 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-10 04:05:48,370 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-10 04:05:48,371 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 25 [2022-01-10 04:05:48,462 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 31 [2022-01-10 04:05:48,804 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-10 04:05:48,805 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-10 04:05:48,806 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-10 04:05:48,807 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-10 04:05:48,808 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-10 04:05:48,809 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-10 04:05:48,811 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-10 04:05:48,812 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 49 [2022-01-10 04:05:48,992 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-10 04:05:48,992 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 65 treesize of output 41 [2022-01-10 04:05:49,028 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 04:05:49,028 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 04:05:51,217 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-10 04:05:51,220 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 28 [2022-01-10 04:05:51,229 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 04:05:51,229 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 04:05:51,229 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1272635159] [2022-01-10 04:05:51,229 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1272635159] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 04:05:51,229 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 04:05:51,229 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 18 [2022-01-10 04:05:51,229 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2021775981] [2022-01-10 04:05:51,229 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 04:05:51,230 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-10 04:05:51,230 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 04:05:51,230 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-10 04:05:51,230 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=233, Unknown=0, NotChecked=0, Total=306 [2022-01-10 04:05:51,231 INFO L87 Difference]: Start difference. First operand 25 states and 28 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 04:05:53,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 04:05:53,427 INFO L93 Difference]: Finished difference Result 44 states and 48 transitions. [2022-01-10 04:05:53,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-01-10 04:05:53,434 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 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 16 [2022-01-10 04:05:53,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 04:05:53,434 INFO L225 Difference]: With dead ends: 44 [2022-01-10 04:05:53,435 INFO L226 Difference]: Without dead ends: 35 [2022-01-10 04:05:53,435 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 176 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=247, Invalid=745, Unknown=0, NotChecked=0, Total=992 [2022-01-10 04:05:53,436 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 75 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 146 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 222 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 146 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 26 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-10 04:05:53,436 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [75 Valid, 65 Invalid, 222 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 146 Invalid, 0 Unknown, 26 Unchecked, 0.9s Time] [2022-01-10 04:05:53,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2022-01-10 04:05:53,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 32. [2022-01-10 04:05:53,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 31 states have (on average 1.1290322580645162) internal successors, (35), 31 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 04:05:53,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 35 transitions. [2022-01-10 04:05:53,440 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 35 transitions. Word has length 16 [2022-01-10 04:05:53,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 04:05:53,440 INFO L470 AbstractCegarLoop]: Abstraction has 32 states and 35 transitions. [2022-01-10 04:05:53,440 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 04:05:53,441 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 35 transitions. [2022-01-10 04:05:53,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-01-10 04:05:53,441 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 04:05:53,441 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 04:05:53,450 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 04:05:53,641 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 04:05:53,642 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 04:05:53,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 04:05:53,642 INFO L85 PathProgramCache]: Analyzing trace with hash -1174519208, now seen corresponding path program 2 times [2022-01-10 04:05:53,642 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 04:05:53,642 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1308834121] [2022-01-10 04:05:53,642 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-10 04:05:53,643 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 04:05:53,643 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 04:05:53,644 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 04:05:53,645 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 04:05:53,787 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-10 04:05:53,787 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 04:05:53,796 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2022-01-10 04:05:53,797 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 04:05:54,040 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 04:05:54,041 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 04:05:54,399 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 04:05:54,400 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 04:05:54,400 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1308834121] [2022-01-10 04:05:54,400 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1308834121] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 04:05:54,400 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 04:05:54,400 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9] total 19 [2022-01-10 04:05:54,400 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1002754501] [2022-01-10 04:05:54,400 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 04:05:54,401 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-10 04:05:54,401 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 04:05:54,401 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-10 04:05:54,401 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=248, Unknown=0, NotChecked=0, Total=342 [2022-01-10 04:05:54,401 INFO L87 Difference]: Start difference. First operand 32 states and 35 transitions. Second operand has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 04:05:56,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 04:05:56,048 INFO L93 Difference]: Finished difference Result 78 states and 86 transitions. [2022-01-10 04:05:56,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-01-10 04:05:56,058 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 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 18 [2022-01-10 04:05:56,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 04:05:56,058 INFO L225 Difference]: With dead ends: 78 [2022-01-10 04:05:56,058 INFO L226 Difference]: Without dead ends: 69 [2022-01-10 04:05:56,059 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 291 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=360, Invalid=1046, Unknown=0, NotChecked=0, Total=1406 [2022-01-10 04:05:56,060 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 167 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 186 mSolverCounterSat, 75 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 167 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 261 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 186 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-10 04:05:56,060 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [167 Valid, 61 Invalid, 261 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [75 Valid, 186 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-10 04:05:56,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2022-01-10 04:05:56,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 42. [2022-01-10 04:05:56,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 41 states have (on average 1.1219512195121952) internal successors, (46), 41 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 04:05:56,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 46 transitions. [2022-01-10 04:05:56,066 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 46 transitions. Word has length 18 [2022-01-10 04:05:56,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 04:05:56,066 INFO L470 AbstractCegarLoop]: Abstraction has 42 states and 46 transitions. [2022-01-10 04:05:56,066 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 04:05:56,066 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 46 transitions. [2022-01-10 04:05:56,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-10 04:05:56,066 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 04:05:56,066 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 04:05:56,075 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Ended with exit code 0 [2022-01-10 04:05:56,267 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 04:05:56,267 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 04:05:56,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 04:05:56,268 INFO L85 PathProgramCache]: Analyzing trace with hash 798963152, now seen corresponding path program 1 times [2022-01-10 04:05:56,268 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 04:05:56,268 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [594094238] [2022-01-10 04:05:56,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 04:05:56,268 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 04:05:56,269 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 04:05:56,269 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 04:05:56,272 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 04:05:56,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 04:05:56,766 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 36 conjunts are in the unsatisfiable core [2022-01-10 04:05:56,768 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 04:05:56,824 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 9 [2022-01-10 04:05:56,843 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-10 04:05:56,845 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-10 04:05:56,845 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-10 04:05:56,846 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-10 04:05:56,848 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-10 04:05:56,849 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-10 04:05:56,850 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-10 04:05:56,851 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 43 [2022-01-10 04:05:56,991 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-10 04:05:56,992 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-10 04:05:56,993 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-10 04:05:56,994 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-10 04:05:56,994 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-10 04:05:56,995 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-10 04:05:56,996 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-10 04:05:56,997 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-10 04:05:56,998 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-10 04:05:57,000 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-10 04:05:57,006 INFO L353 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2022-01-10 04:05:57,006 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 64 treesize of output 76 [2022-01-10 04:05:57,404 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-10 04:05:57,404 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-10 04:05:57,405 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-10 04:05:57,405 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-10 04:05:57,406 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-10 04:05:57,407 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-10 04:05:57,408 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-10 04:05:57,408 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-10 04:05:57,409 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-10 04:05:57,414 INFO L353 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2022-01-10 04:05:57,415 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 109 treesize of output 85 [2022-01-10 04:05:58,248 INFO L353 Elim1Store]: treesize reduction 13, result has 23.5 percent of original size [2022-01-10 04:05:58,249 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 6 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 133 treesize of output 81 [2022-01-10 04:05:58,295 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 04:05:58,295 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 04:06:04,348 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-10 04:06:04,352 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-10 04:06:04,353 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-10 04:06:04,353 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-10 04:06:04,354 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-10 04:06:04,354 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-10 04:06:04,356 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-10 04:06:04,365 INFO L353 Elim1Store]: treesize reduction 100, result has 1.0 percent of original size [2022-01-10 04:06:04,365 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 10 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 10 case distinctions, treesize of input 497 treesize of output 1 [2022-01-10 04:06:04,374 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 04:06:04,375 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 04:06:04,375 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [594094238] [2022-01-10 04:06:04,375 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [594094238] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 04:06:04,375 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 04:06:04,375 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 22 [2022-01-10 04:06:04,375 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1049387834] [2022-01-10 04:06:04,375 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 04:06:04,376 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-10 04:06:04,376 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 04:06:04,376 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-10 04:06:04,376 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=370, Unknown=0, NotChecked=0, Total=462 [2022-01-10 04:06:04,376 INFO L87 Difference]: Start difference. First operand 42 states and 46 transitions. Second operand has 22 states, 22 states have (on average 1.6818181818181819) internal successors, (37), 22 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 04:06:11,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 04:06:11,750 INFO L93 Difference]: Finished difference Result 44 states and 47 transitions. [2022-01-10 04:06:11,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-01-10 04:06:11,750 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.6818181818181819) internal successors, (37), 22 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 20 [2022-01-10 04:06:11,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 04:06:11,751 INFO L225 Difference]: With dead ends: 44 [2022-01-10 04:06:11,751 INFO L226 Difference]: Without dead ends: 31 [2022-01-10 04:06:11,751 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 219 ImplicationChecksByTransitivity, 10.3s TimeCoverageRelationStatistics Valid=243, Invalid=879, Unknown=0, NotChecked=0, Total=1122 [2022-01-10 04:06:11,753 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 37 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 108 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 190 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 108 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 43 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2022-01-10 04:06:11,753 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [37 Valid, 61 Invalid, 190 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 108 Invalid, 0 Unknown, 43 Unchecked, 2.9s Time] [2022-01-10 04:06:11,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2022-01-10 04:06:11,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2022-01-10 04:06:11,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 30 states have (on average 1.1333333333333333) internal successors, (34), 30 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 04:06:11,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 34 transitions. [2022-01-10 04:06:11,758 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 34 transitions. Word has length 20 [2022-01-10 04:06:11,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 04:06:11,758 INFO L470 AbstractCegarLoop]: Abstraction has 31 states and 34 transitions. [2022-01-10 04:06:11,758 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.6818181818181819) internal successors, (37), 22 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 04:06:11,758 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 34 transitions. [2022-01-10 04:06:11,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-10 04:06:11,758 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 04:06:11,758 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 04:06:11,768 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 04:06:11,960 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 04:06:11,960 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 04:06:11,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 04:06:11,961 INFO L85 PathProgramCache]: Analyzing trace with hash -1786143722, now seen corresponding path program 3 times [2022-01-10 04:06:11,961 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 04:06:11,961 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1165715871] [2022-01-10 04:06:11,961 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-10 04:06:11,961 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 04:06:11,961 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 04:06:11,963 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 04:06:11,964 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 04:06:12,297 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-10 04:06:12,297 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 04:06:12,310 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 33 conjunts are in the unsatisfiable core [2022-01-10 04:06:12,314 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 04:06:12,439 INFO L353 Elim1Store]: treesize reduction 52, result has 26.8 percent of original size [2022-01-10 04:06:12,439 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 62 treesize of output 77 [2022-01-10 04:06:12,448 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-10 04:06:12,449 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-10 04:06:12,456 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 25 [2022-01-10 04:06:12,467 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-10 04:06:12,468 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-10 04:06:12,475 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 25 [2022-01-10 04:06:12,520 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-10 04:06:12,520 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 15 [2022-01-10 04:06:12,641 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 9 [2022-01-10 04:06:12,699 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 31 [2022-01-10 04:06:12,891 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 31 [2022-01-10 04:06:13,160 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-10 04:06:13,161 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-10 04:06:13,162 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-10 04:06:13,163 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-10 04:06:13,164 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-10 04:06:13,165 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-10 04:06:13,168 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-10 04:06:13,169 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 48 treesize of output 54 [2022-01-10 04:06:13,278 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-10 04:06:13,280 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-10 04:06:13,280 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-10 04:06:13,281 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-10 04:06:13,282 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-10 04:06:13,283 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-10 04:06:13,286 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-10 04:06:13,286 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 49 [2022-01-10 04:06:13,444 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-10 04:06:13,445 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 65 treesize of output 41 [2022-01-10 04:06:13,478 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 04:06:13,478 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 04:06:17,880 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-10 04:06:17,883 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 28 [2022-01-10 04:06:17,892 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 04:06:17,892 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 04:06:17,892 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1165715871] [2022-01-10 04:06:17,892 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1165715871] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 04:06:17,893 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 04:06:17,893 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 24 [2022-01-10 04:06:17,893 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [668094476] [2022-01-10 04:06:17,893 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 04:06:17,893 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-10 04:06:17,893 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 04:06:17,893 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-10 04:06:17,894 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=419, Unknown=0, NotChecked=0, Total=552 [2022-01-10 04:06:17,894 INFO L87 Difference]: Start difference. First operand 31 states and 34 transitions. Second operand has 24 states, 24 states have (on average 1.5416666666666667) internal successors, (37), 24 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 04:06:24,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 04:06:24,948 INFO L93 Difference]: Finished difference Result 65 states and 71 transitions. [2022-01-10 04:06:24,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-01-10 04:06:24,958 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.5416666666666667) internal successors, (37), 24 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 20 [2022-01-10 04:06:24,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 04:06:24,959 INFO L225 Difference]: With dead ends: 65 [2022-01-10 04:06:24,959 INFO L226 Difference]: Without dead ends: 63 [2022-01-10 04:06:24,959 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 408 ImplicationChecksByTransitivity, 10.1s TimeCoverageRelationStatistics Valid=353, Invalid=1287, Unknown=0, NotChecked=0, Total=1640 [2022-01-10 04:06:24,960 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 59 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 171 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 332 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 171 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 113 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-01-10 04:06:24,960 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [59 Valid, 92 Invalid, 332 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 171 Invalid, 0 Unknown, 113 Unchecked, 1.2s Time] [2022-01-10 04:06:24,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2022-01-10 04:06:24,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 42. [2022-01-10 04:06:24,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 41 states have (on average 1.146341463414634) internal successors, (47), 41 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 04:06:24,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 47 transitions. [2022-01-10 04:06:24,966 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 47 transitions. Word has length 20 [2022-01-10 04:06:24,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 04:06:24,966 INFO L470 AbstractCegarLoop]: Abstraction has 42 states and 47 transitions. [2022-01-10 04:06:24,967 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.5416666666666667) internal successors, (37), 24 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 04:06:24,967 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 47 transitions. [2022-01-10 04:06:24,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-10 04:06:24,967 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 04:06:24,967 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 04:06:24,984 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Ended with exit code 0 [2022-01-10 04:06:25,177 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 04:06:25,177 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 04:06:25,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 04:06:25,178 INFO L85 PathProgramCache]: Analyzing trace with hash 1232945932, now seen corresponding path program 2 times [2022-01-10 04:06:25,178 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 04:06:25,178 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1775804852] [2022-01-10 04:06:25,178 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-10 04:06:25,178 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 04:06:25,179 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 04:06:25,181 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 04:06:25,182 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 04:06:25,566 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-10 04:06:25,567 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 04:06:25,585 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 42 conjunts are in the unsatisfiable core [2022-01-10 04:06:25,594 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 04:06:25,699 INFO L353 Elim1Store]: treesize reduction 20, result has 47.4 percent of original size [2022-01-10 04:06:25,699 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 86 treesize of output 87 [2022-01-10 04:06:25,772 INFO L353 Elim1Store]: treesize reduction 52, result has 34.2 percent of original size [2022-01-10 04:06:25,772 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 79 treesize of output 105 [2022-01-10 04:06:25,795 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-10 04:06:25,796 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-10 04:06:25,802 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 25 [2022-01-10 04:06:25,821 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 19 [2022-01-10 04:06:25,915 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-10 04:06:25,916 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-10 04:06:25,923 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 25 [2022-01-10 04:06:26,013 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-10 04:06:26,014 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-10 04:06:26,015 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-10 04:06:26,015 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-10 04:06:26,017 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 70 [2022-01-10 04:06:26,036 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-10 04:06:26,037 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 7 [2022-01-10 04:06:26,117 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-10 04:06:26,118 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 9 [2022-01-10 04:06:26,220 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-10 04:06:26,222 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-10 04:06:26,223 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-10 04:06:26,224 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 23 [2022-01-10 04:06:26,347 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 9 [2022-01-10 04:06:26,473 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-10 04:06:26,474 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-10 04:06:26,474 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-10 04:06:26,493 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-10 04:06:26,493 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-10 04:06:26,494 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-10 04:06:26,495 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-10 04:06:26,496 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-10 04:06:26,496 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-10 04:06:26,497 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-10 04:06:26,502 INFO L353 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2022-01-10 04:06:26,502 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 64 treesize of output 76 [2022-01-10 04:06:26,644 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-10 04:06:26,645 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-10 04:06:26,646 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-10 04:06:26,646 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-10 04:06:26,647 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-10 04:06:26,647 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-10 04:06:26,648 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-10 04:06:26,649 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-10 04:06:26,650 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-10 04:06:26,650 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-10 04:06:26,655 INFO L353 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2022-01-10 04:06:26,655 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 64 treesize of output 76 [2022-01-10 04:06:27,079 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-10 04:06:27,080 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-10 04:06:27,081 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-10 04:06:27,082 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-10 04:06:27,082 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-10 04:06:27,083 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-10 04:06:27,084 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-10 04:06:27,085 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-10 04:06:27,086 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-10 04:06:27,087 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-10 04:06:27,088 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-10 04:06:27,089 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-10 04:06:27,090 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-10 04:06:27,092 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-10 04:06:27,093 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-10 04:06:27,094 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-10 04:06:27,094 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-10 04:06:27,094 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-10 04:06:27,095 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-10 04:06:27,097 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-10 04:06:27,097 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-10 04:06:27,098 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-10 04:06:27,098 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-10 04:06:27,105 INFO L353 Elim1Store]: treesize reduction 76, result has 1.3 percent of original size [2022-01-10 04:06:27,105 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 146 treesize of output 136 [2022-01-10 04:06:27,467 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-10 04:06:27,468 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-10 04:06:27,469 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-10 04:06:27,470 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-10 04:06:27,471 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-10 04:06:27,472 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-10 04:06:27,473 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-10 04:06:27,474 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-10 04:06:27,475 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-10 04:06:27,476 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-10 04:06:27,477 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-10 04:06:27,478 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-10 04:06:27,479 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-10 04:06:27,480 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-10 04:06:27,480 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-10 04:06:27,481 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-10 04:06:27,482 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-10 04:06:27,483 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-10 04:06:27,489 INFO L353 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2022-01-10 04:06:27,490 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 15 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 127 treesize of output 109 [2022-01-10 04:06:28,346 INFO L353 Elim1Store]: treesize reduction 13, result has 23.5 percent of original size [2022-01-10 04:06:28,346 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 6 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 141 treesize of output 73 [2022-01-10 04:06:28,390 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 04:06:28,391 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 04:06:42,225 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-10 04:06:42,228 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-10 04:06:42,235 INFO L353 Elim1Store]: treesize reduction 20, result has 4.8 percent of original size [2022-01-10 04:06:42,235 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 1298 treesize of output 1 [2022-01-10 04:06:42,241 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 04:06:42,241 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 04:06:42,241 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1775804852] [2022-01-10 04:06:42,242 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1775804852] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 04:06:42,242 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 04:06:42,242 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 28 [2022-01-10 04:06:42,242 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1068813820] [2022-01-10 04:06:42,242 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 04:06:42,242 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-01-10 04:06:42,242 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 04:06:42,242 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-01-10 04:06:42,243 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=619, Unknown=1, NotChecked=0, Total=756 [2022-01-10 04:06:42,243 INFO L87 Difference]: Start difference. First operand 42 states and 47 transitions. Second operand has 28 states, 28 states have (on average 1.6071428571428572) internal successors, (45), 28 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)