/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/AutomizerC.xml -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationQvasr_64.epf -i ../../../trunk/examples/svcomp/loop-industry-pattern/aiob_4.c.v+lh-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-34549b5 [2022-04-06 20:17:27,762 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-04-06 20:17:27,764 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-04-06 20:17:27,795 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-04-06 20:17:27,809 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-04-06 20:17:27,811 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-04-06 20:17:27,812 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-04-06 20:17:27,813 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-04-06 20:17:27,814 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-04-06 20:17:27,814 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-04-06 20:17:27,817 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-04-06 20:17:27,821 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-04-06 20:17:27,823 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-04-06 20:17:27,823 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-04-06 20:17:27,824 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-04-06 20:17:27,826 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-04-06 20:17:27,827 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-04-06 20:17:27,831 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-04-06 20:17:27,837 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-04-06 20:17:27,837 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-04-06 20:17:27,838 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-04-06 20:17:27,839 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationQvasr_64.epf [2022-04-06 20:17:27,847 INFO L113 SettingsManager]: Loading preferences was successful [2022-04-06 20:17:27,847 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-04-06 20:17:27,848 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-04-06 20:17:27,848 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-04-06 20:17:27,848 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-04-06 20:17:27,848 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-04-06 20:17:27,848 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-04-06 20:17:27,848 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-04-06 20:17:27,848 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-04-06 20:17:27,849 INFO L138 SettingsManager]: * Use constant arrays=true [2022-04-06 20:17:27,849 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-04-06 20:17:27,849 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-04-06 20:17:27,849 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-04-06 20:17:27,850 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-04-06 20:17:27,850 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-04-06 20:17:27,850 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-04-06 20:17:27,850 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-04-06 20:17:27,850 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=Craig_NestedInterpolation [2022-04-06 20:17:27,850 INFO L138 SettingsManager]: * Trace refinement strategy=ACCELERATED_INTERPOLATION [2022-04-06 20:17:27,850 INFO L138 SettingsManager]: * Trace refinement strategy used in Accelerated Interpolation=CAMEL [2022-04-06 20:17:27,850 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-04-06 20:17:27,850 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=QVASR [2022-04-06 20:17:27,850 INFO L138 SettingsManager]: * Use separate solver for trace checks=false 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-04-06 20:17:28,005 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-04-06 20:17:28,021 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-04-06 20:17:28,022 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-04-06 20:17:28,023 INFO L271 PluginConnector]: Initializing CDTParser... [2022-04-06 20:17:28,023 INFO L275 PluginConnector]: CDTParser initialized [2022-04-06 20:17:28,024 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-industry-pattern/aiob_4.c.v+lh-reducer.c [2022-04-06 20:17:28,070 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3bd026bad/3c345cddb9604e9f8cb17bbf2b975977/FLAG01de7e134 [2022-04-06 20:17:28,467 INFO L306 CDTParser]: Found 1 translation units. [2022-04-06 20:17:28,467 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-industry-pattern/aiob_4.c.v+lh-reducer.c [2022-04-06 20:17:28,478 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3bd026bad/3c345cddb9604e9f8cb17bbf2b975977/FLAG01de7e134 [2022-04-06 20:17:28,490 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3bd026bad/3c345cddb9604e9f8cb17bbf2b975977 [2022-04-06 20:17:28,492 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-04-06 20:17:28,494 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-04-06 20:17:28,496 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-04-06 20:17:28,496 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-04-06 20:17:28,498 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-04-06 20:17:28,499 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.04 08:17:28" (1/1) ... [2022-04-06 20:17:28,499 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6b71d113 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 08:17:28, skipping insertion in model container [2022-04-06 20:17:28,500 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.04 08:17:28" (1/1) ... [2022-04-06 20:17:28,505 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-04-06 20:17:28,542 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-04-06 20:17:28,756 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loop-industry-pattern/aiob_4.c.v+lh-reducer.c[8507,8520] [2022-04-06 20:17:28,767 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-04-06 20:17:28,773 INFO L203 MainTranslator]: Completed pre-run [2022-04-06 20:17:28,824 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loop-industry-pattern/aiob_4.c.v+lh-reducer.c[8507,8520] [2022-04-06 20:17:28,826 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-04-06 20:17:28,834 INFO L208 MainTranslator]: Completed translation [2022-04-06 20:17:28,835 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 08:17:28 WrapperNode [2022-04-06 20:17:28,835 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-04-06 20:17:28,840 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-04-06 20:17:28,840 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-04-06 20:17:28,841 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-04-06 20:17:28,848 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 08:17:28" (1/1) ... [2022-04-06 20:17:28,848 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 08:17:28" (1/1) ... [2022-04-06 20:17:28,857 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 08:17:28" (1/1) ... [2022-04-06 20:17:28,857 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 08:17:28" (1/1) ... [2022-04-06 20:17:28,906 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 08:17:28" (1/1) ... [2022-04-06 20:17:28,908 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 08:17:28" (1/1) ... [2022-04-06 20:17:28,909 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 08:17:28" (1/1) ... [2022-04-06 20:17:28,929 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-04-06 20:17:28,930 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-04-06 20:17:28,930 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-04-06 20:17:28,930 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-04-06 20:17:28,940 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 08:17:28" (1/1) ... [2022-04-06 20:17:28,945 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-04-06 20:17:28,955 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:17:28,993 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) [2022-04-06 20:17:29,019 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 [2022-04-06 20:17:29,046 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-04-06 20:17:29,047 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-04-06 20:17:29,047 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-04-06 20:17:29,047 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-04-06 20:17:29,048 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-04-06 20:17:29,059 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-04-06 20:17:29,059 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-04-06 20:17:29,059 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-04-06 20:17:29,060 INFO L130 BoogieDeclarations]: Found specification of procedure Id_MCDC_89 [2022-04-06 20:17:29,060 INFO L130 BoogieDeclarations]: Found specification of procedure fopen [2022-04-06 20:17:29,060 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-04-06 20:17:29,060 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-04-06 20:17:29,060 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-04-06 20:17:29,060 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-04-06 20:17:29,060 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-04-06 20:17:29,060 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-04-06 20:17:29,060 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-04-06 20:17:29,060 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-04-06 20:17:29,060 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-04-06 20:17:29,061 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-04-06 20:17:29,061 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-04-06 20:17:29,231 INFO L234 CfgBuilder]: Building ICFG [2022-04-06 20:17:29,232 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-04-06 20:17:29,719 INFO L275 CfgBuilder]: Performing block encoding [2022-04-06 20:17:29,723 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-04-06 20:17:29,723 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2022-04-06 20:17:29,724 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.04 08:17:29 BoogieIcfgContainer [2022-04-06 20:17:29,724 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-04-06 20:17:29,725 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-04-06 20:17:29,725 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-04-06 20:17:29,731 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-04-06 20:17:29,731 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.04 08:17:28" (1/3) ... [2022-04-06 20:17:29,731 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@568a1060 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.04 08:17:29, skipping insertion in model container [2022-04-06 20:17:29,732 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 08:17:28" (2/3) ... [2022-04-06 20:17:29,732 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@568a1060 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.04 08:17:29, skipping insertion in model container [2022-04-06 20:17:29,732 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.04 08:17:29" (3/3) ... [2022-04-06 20:17:29,733 INFO L111 eAbstractionObserver]: Analyzing ICFG aiob_4.c.v+lh-reducer.c [2022-04-06 20:17:29,737 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-04-06 20:17:29,738 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-04-06 20:17:29,770 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-04-06 20:17:29,776 INFO L340 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=Craig_NestedInterpolation, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, 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 [2022-04-06 20:17:29,776 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-04-06 20:17:29,785 INFO L276 IsEmpty]: Start isEmpty. Operand has 19 states, 13 states have (on average 1.5384615384615385) internal successors, (20), 14 states have internal predecessors, (20), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-06 20:17:29,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-04-06 20:17:29,789 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:17:29,790 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:17:29,790 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:17:29,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:17:29,794 INFO L85 PathProgramCache]: Analyzing trace with hash -63360149, now seen corresponding path program 1 times [2022-04-06 20:17:29,799 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:17:29,799 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [604172226] [2022-04-06 20:17:29,806 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 20:17:29,806 INFO L85 PathProgramCache]: Analyzing trace with hash -63360149, now seen corresponding path program 2 times [2022-04-06 20:17:29,808 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:17:29,808 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [496845456] [2022-04-06 20:17:29,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:17:29,809 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:17:29,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:17:30,097 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:17:30,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:17:30,109 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:17:30,110 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:17:30,110 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [496845456] [2022-04-06 20:17:30,110 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [496845456] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:17:30,110 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:17:30,110 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-06 20:17:30,112 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:17:30,112 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [604172226] [2022-04-06 20:17:30,112 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [604172226] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:17:30,113 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:17:30,113 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-06 20:17:30,113 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1242110817] [2022-04-06 20:17:30,113 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:17:30,115 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-04-06 20:17:30,116 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:17:30,134 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-04-06 20:17:30,134 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-04-06 20:17:30,136 INFO L87 Difference]: Start difference. First operand has 19 states, 13 states have (on average 1.5384615384615385) internal successors, (20), 14 states have internal predecessors, (20), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:17:30,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:17:30,230 INFO L93 Difference]: Finished difference Result 38 states and 46 transitions. [2022-04-06 20:17:30,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-04-06 20:17:30,232 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2022-04-06 20:17:30,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:17:30,236 INFO L225 Difference]: With dead ends: 38 [2022-04-06 20:17:30,237 INFO L226 Difference]: Without dead ends: 21 [2022-04-06 20:17:30,238 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-04-06 20:17:30,240 INFO L913 BasicCegarLoop]: 15 mSDtfsCounter, 27 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:17:30,241 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 43 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:17:30,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2022-04-06 20:17:30,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 18. [2022-04-06 20:17:30,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 14 states have (on average 1.0714285714285714) internal successors, (15), 14 states have internal predecessors, (15), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:17:30,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 18 transitions. [2022-04-06 20:17:30,274 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 18 transitions. Word has length 12 [2022-04-06 20:17:30,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:17:30,274 INFO L478 AbstractCegarLoop]: Abstraction has 18 states and 18 transitions. [2022-04-06 20:17:30,274 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:17:30,274 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 18 transitions. [2022-04-06 20:17:30,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-04-06 20:17:30,275 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:17:30,275 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:17:30,275 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-04-06 20:17:30,275 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:17:30,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:17:30,276 INFO L85 PathProgramCache]: Analyzing trace with hash -2033873229, now seen corresponding path program 1 times [2022-04-06 20:17:30,276 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:17:30,276 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1491733485] [2022-04-06 20:17:30,276 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 20:17:30,276 INFO L85 PathProgramCache]: Analyzing trace with hash -2033873229, now seen corresponding path program 2 times [2022-04-06 20:17:30,277 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:17:30,277 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [500181304] [2022-04-06 20:17:30,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:17:30,277 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:17:30,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:17:30,418 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:17:30,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:17:30,426 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:17:30,426 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:17:30,429 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [500181304] [2022-04-06 20:17:30,429 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [500181304] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:17:30,430 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1269893789] [2022-04-06 20:17:30,430 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:17:30,430 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:17:30,430 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:17:30,433 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:17:30,440 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-04-06 20:17:30,619 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:17:30,619 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:17:30,623 INFO L263 TraceCheckSpWp]: Trace formula consists of 579 conjuncts, 7 conjunts are in the unsatisfiable core [2022-04-06 20:17:30,628 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:17:30,707 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:17:30,707 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:17:30,764 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:17:30,765 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1269893789] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:17:30,765 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:17:30,765 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 10 [2022-04-06 20:17:30,766 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:17:30,766 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1491733485] [2022-04-06 20:17:30,766 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1491733485] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:17:30,766 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:17:30,766 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-04-06 20:17:30,766 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1848188784] [2022-04-06 20:17:30,766 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:17:30,767 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-04-06 20:17:30,767 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:17:30,767 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-04-06 20:17:30,767 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2022-04-06 20:17:30,767 INFO L87 Difference]: Start difference. First operand 18 states and 18 transitions. Second operand has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:17:30,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:17:30,861 INFO L93 Difference]: Finished difference Result 29 states and 29 transitions. [2022-04-06 20:17:30,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-04-06 20:17:30,862 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 17 [2022-04-06 20:17:30,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:17:30,862 INFO L225 Difference]: With dead ends: 29 [2022-04-06 20:17:30,862 INFO L226 Difference]: Without dead ends: 26 [2022-04-06 20:17:30,863 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2022-04-06 20:17:30,864 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 14 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 20:17:30,864 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 36 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 20:17:30,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2022-04-06 20:17:30,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 23. [2022-04-06 20:17:30,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 19 states have (on average 1.0526315789473684) internal successors, (20), 19 states have internal predecessors, (20), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:17:30,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 23 transitions. [2022-04-06 20:17:30,895 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 23 transitions. Word has length 17 [2022-04-06 20:17:30,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:17:30,895 INFO L478 AbstractCegarLoop]: Abstraction has 23 states and 23 transitions. [2022-04-06 20:17:30,895 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:17:30,895 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 23 transitions. [2022-04-06 20:17:30,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-04-06 20:17:30,896 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:17:30,896 INFO L499 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:17:30,913 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-04-06 20:17:31,112 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:17:31,113 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:17:31,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:17:31,114 INFO L85 PathProgramCache]: Analyzing trace with hash 2006384747, now seen corresponding path program 3 times [2022-04-06 20:17:31,114 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:17:31,114 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1008726218] [2022-04-06 20:17:31,114 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 20:17:31,114 INFO L85 PathProgramCache]: Analyzing trace with hash 2006384747, now seen corresponding path program 4 times [2022-04-06 20:17:31,114 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:17:31,115 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [461020853] [2022-04-06 20:17:31,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:17:31,115 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:17:31,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:17:31,209 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:17:31,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:17:31,213 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:17:31,214 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:17:31,214 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [461020853] [2022-04-06 20:17:31,214 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [461020853] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:17:31,214 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1684502105] [2022-04-06 20:17:31,214 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:17:31,214 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:17:31,214 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:17:31,215 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:17:31,216 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-04-06 20:17:31,349 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:17:31,349 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:17:31,351 INFO L263 TraceCheckSpWp]: Trace formula consists of 601 conjuncts, 9 conjunts are in the unsatisfiable core [2022-04-06 20:17:31,353 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:17:31,429 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:17:31,429 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:17:31,501 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:17:31,501 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1684502105] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:17:31,501 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:17:31,501 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 12 [2022-04-06 20:17:31,502 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:17:31,502 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1008726218] [2022-04-06 20:17:31,502 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1008726218] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:17:31,502 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:17:31,502 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-04-06 20:17:31,502 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [12028003] [2022-04-06 20:17:31,502 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:17:31,502 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-04-06 20:17:31,502 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:17:31,503 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-04-06 20:17:31,503 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2022-04-06 20:17:31,503 INFO L87 Difference]: Start difference. First operand 23 states and 23 transitions. Second operand has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:17:31,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:17:31,613 INFO L93 Difference]: Finished difference Result 34 states and 34 transitions. [2022-04-06 20:17:31,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-04-06 20:17:31,613 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 22 [2022-04-06 20:17:31,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:17:31,614 INFO L225 Difference]: With dead ends: 34 [2022-04-06 20:17:31,614 INFO L226 Difference]: Without dead ends: 31 [2022-04-06 20:17:31,614 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2022-04-06 20:17:31,615 INFO L913 BasicCegarLoop]: 13 mSDtfsCounter, 16 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:17:31,615 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 49 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 66 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:17:31,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2022-04-06 20:17:31,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 28. [2022-04-06 20:17:31,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 24 states have (on average 1.0416666666666667) internal successors, (25), 24 states have internal predecessors, (25), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:17:31,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 28 transitions. [2022-04-06 20:17:31,620 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 28 transitions. Word has length 22 [2022-04-06 20:17:31,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:17:31,620 INFO L478 AbstractCegarLoop]: Abstraction has 28 states and 28 transitions. [2022-04-06 20:17:31,620 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:17:31,620 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 28 transitions. [2022-04-06 20:17:31,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-04-06 20:17:31,620 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:17:31,621 INFO L499 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:17:31,651 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-04-06 20:17:31,835 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2022-04-06 20:17:31,836 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:17:31,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:17:31,836 INFO L85 PathProgramCache]: Analyzing trace with hash 1862263219, now seen corresponding path program 5 times [2022-04-06 20:17:31,836 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:17:31,836 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [749082251] [2022-04-06 20:17:31,837 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 20:17:31,837 INFO L85 PathProgramCache]: Analyzing trace with hash 1862263219, now seen corresponding path program 6 times [2022-04-06 20:17:31,837 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:17:31,837 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1983297649] [2022-04-06 20:17:31,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:17:31,837 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:17:31,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:17:31,957 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:17:31,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:17:31,961 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:17:31,961 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:17:31,961 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1983297649] [2022-04-06 20:17:31,961 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1983297649] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:17:31,961 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [627974016] [2022-04-06 20:17:31,962 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:17:31,962 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:17:31,962 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:17:31,963 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:17:31,964 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-04-06 20:17:32,135 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-04-06 20:17:32,136 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:17:32,138 INFO L263 TraceCheckSpWp]: Trace formula consists of 623 conjuncts, 11 conjunts are in the unsatisfiable core [2022-04-06 20:17:32,140 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:17:32,222 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:17:32,222 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:17:32,342 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:17:32,342 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [627974016] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:17:32,342 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:17:32,342 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 14 [2022-04-06 20:17:32,343 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:17:32,343 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [749082251] [2022-04-06 20:17:32,343 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [749082251] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:17:32,343 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:17:32,343 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-04-06 20:17:32,343 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [556332053] [2022-04-06 20:17:32,343 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:17:32,343 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-04-06 20:17:32,343 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:17:32,344 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-04-06 20:17:32,344 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2022-04-06 20:17:32,344 INFO L87 Difference]: Start difference. First operand 28 states and 28 transitions. Second operand has 8 states, 8 states have (on average 3.0) internal successors, (24), 7 states have internal predecessors, (24), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:17:32,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:17:32,480 INFO L93 Difference]: Finished difference Result 39 states and 39 transitions. [2022-04-06 20:17:32,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-04-06 20:17:32,481 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.0) internal successors, (24), 7 states have internal predecessors, (24), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 27 [2022-04-06 20:17:32,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:17:32,481 INFO L225 Difference]: With dead ends: 39 [2022-04-06 20:17:32,481 INFO L226 Difference]: Without dead ends: 36 [2022-04-06 20:17:32,482 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 49 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=97, Invalid=283, Unknown=0, NotChecked=0, Total=380 [2022-04-06 20:17:32,482 INFO L913 BasicCegarLoop]: 14 mSDtfsCounter, 18 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 101 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 111 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 101 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:17:32,483 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 64 Invalid, 111 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 101 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:17:32,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2022-04-06 20:17:32,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 33. [2022-04-06 20:17:32,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 29 states have (on average 1.0344827586206897) internal successors, (30), 29 states have internal predecessors, (30), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:17:32,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 33 transitions. [2022-04-06 20:17:32,488 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 33 transitions. Word has length 27 [2022-04-06 20:17:32,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:17:32,488 INFO L478 AbstractCegarLoop]: Abstraction has 33 states and 33 transitions. [2022-04-06 20:17:32,488 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.0) internal successors, (24), 7 states have internal predecessors, (24), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:17:32,488 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 33 transitions. [2022-04-06 20:17:32,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-04-06 20:17:32,489 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:17:32,489 INFO L499 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:17:32,509 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-04-06 20:17:32,699 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:17:32,699 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:17:32,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:17:32,700 INFO L85 PathProgramCache]: Analyzing trace with hash 1171819883, now seen corresponding path program 7 times [2022-04-06 20:17:32,700 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:17:32,700 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1244250090] [2022-04-06 20:17:32,700 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 20:17:32,700 INFO L85 PathProgramCache]: Analyzing trace with hash 1171819883, now seen corresponding path program 8 times [2022-04-06 20:17:32,701 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:17:32,701 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1182313492] [2022-04-06 20:17:32,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:17:32,701 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:17:32,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:17:32,819 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:17:32,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:17:32,823 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:17:32,823 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:17:32,823 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1182313492] [2022-04-06 20:17:32,823 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1182313492] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:17:32,824 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [999372764] [2022-04-06 20:17:32,824 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:17:32,824 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:17:32,824 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:17:32,825 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:17:32,831 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-04-06 20:17:32,985 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:17:32,986 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:17:32,988 INFO L263 TraceCheckSpWp]: Trace formula consists of 645 conjuncts, 13 conjunts are in the unsatisfiable core [2022-04-06 20:17:32,989 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:17:33,086 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:17:33,086 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:17:33,204 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:17:33,204 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [999372764] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:17:33,204 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:17:33,204 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 16 [2022-04-06 20:17:33,204 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:17:33,204 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1244250090] [2022-04-06 20:17:33,204 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1244250090] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:17:33,204 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:17:33,205 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-04-06 20:17:33,205 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [407777629] [2022-04-06 20:17:33,205 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:17:33,205 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-04-06 20:17:33,205 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:17:33,205 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-04-06 20:17:33,205 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2022-04-06 20:17:33,206 INFO L87 Difference]: Start difference. First operand 33 states and 33 transitions. Second operand has 9 states, 9 states have (on average 3.2222222222222223) internal successors, (29), 8 states have internal predecessors, (29), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:17:33,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:17:33,367 INFO L93 Difference]: Finished difference Result 44 states and 44 transitions. [2022-04-06 20:17:33,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-04-06 20:17:33,367 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.2222222222222223) internal successors, (29), 8 states have internal predecessors, (29), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 32 [2022-04-06 20:17:33,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:17:33,368 INFO L225 Difference]: With dead ends: 44 [2022-04-06 20:17:33,368 INFO L226 Difference]: Without dead ends: 41 [2022-04-06 20:17:33,368 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 58 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=125, Invalid=381, Unknown=0, NotChecked=0, Total=506 [2022-04-06 20:17:33,369 INFO L913 BasicCegarLoop]: 15 mSDtfsCounter, 20 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 144 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 156 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 144 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:17:33,369 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 81 Invalid, 156 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 144 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:17:33,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2022-04-06 20:17:33,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 38. [2022-04-06 20:17:33,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 34 states have (on average 1.0294117647058822) internal successors, (35), 34 states have internal predecessors, (35), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:17:33,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 38 transitions. [2022-04-06 20:17:33,374 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 38 transitions. Word has length 32 [2022-04-06 20:17:33,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:17:33,374 INFO L478 AbstractCegarLoop]: Abstraction has 38 states and 38 transitions. [2022-04-06 20:17:33,375 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.2222222222222223) internal successors, (29), 8 states have internal predecessors, (29), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:17:33,375 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 38 transitions. [2022-04-06 20:17:33,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-04-06 20:17:33,375 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:17:33,375 INFO L499 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:17:33,392 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-04-06 20:17:33,587 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:17:33,587 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:17:33,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:17:33,588 INFO L85 PathProgramCache]: Analyzing trace with hash -55675725, now seen corresponding path program 9 times [2022-04-06 20:17:33,588 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:17:33,588 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [762209492] [2022-04-06 20:17:33,588 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 20:17:33,588 INFO L85 PathProgramCache]: Analyzing trace with hash -55675725, now seen corresponding path program 10 times [2022-04-06 20:17:33,589 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:17:33,589 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [801489759] [2022-04-06 20:17:33,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:17:33,589 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:17:33,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:17:33,710 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:17:33,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:17:33,728 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 0 proven. 65 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:17:33,728 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:17:33,728 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [801489759] [2022-04-06 20:17:33,728 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [801489759] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:17:33,728 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [341983905] [2022-04-06 20:17:33,728 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:17:33,729 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:17:33,729 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:17:33,729 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:17:33,731 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-04-06 20:17:33,916 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:17:33,916 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:17:33,918 INFO L263 TraceCheckSpWp]: Trace formula consists of 667 conjuncts, 15 conjunts are in the unsatisfiable core [2022-04-06 20:17:33,920 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:17:34,026 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 0 proven. 65 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:17:34,026 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:17:34,166 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 0 proven. 65 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:17:34,166 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [341983905] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:17:34,167 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:17:34,167 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 18 [2022-04-06 20:17:34,167 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:17:34,167 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [762209492] [2022-04-06 20:17:34,167 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [762209492] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:17:34,167 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:17:34,167 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-04-06 20:17:34,167 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2049973603] [2022-04-06 20:17:34,167 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:17:34,168 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-04-06 20:17:34,168 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:17:34,168 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-04-06 20:17:34,169 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2022-04-06 20:17:34,171 INFO L87 Difference]: Start difference. First operand 38 states and 38 transitions. Second operand has 10 states, 10 states have (on average 3.4) internal successors, (34), 9 states have internal predecessors, (34), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:17:34,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:17:34,382 INFO L93 Difference]: Finished difference Result 49 states and 49 transitions. [2022-04-06 20:17:34,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-04-06 20:17:34,383 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.4) internal successors, (34), 9 states have internal predecessors, (34), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 37 [2022-04-06 20:17:34,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:17:34,383 INFO L225 Difference]: With dead ends: 49 [2022-04-06 20:17:34,383 INFO L226 Difference]: Without dead ends: 46 [2022-04-06 20:17:34,384 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 67 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=157, Invalid=493, Unknown=0, NotChecked=0, Total=650 [2022-04-06 20:17:34,384 INFO L913 BasicCegarLoop]: 16 mSDtfsCounter, 22 mSDsluCounter, 84 mSDsCounter, 0 mSdLazyCounter, 195 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 209 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 195 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:17:34,384 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 100 Invalid, 209 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 195 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:17:34,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2022-04-06 20:17:34,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 43. [2022-04-06 20:17:34,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 39 states have (on average 1.0256410256410255) internal successors, (40), 39 states have internal predecessors, (40), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:17:34,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 43 transitions. [2022-04-06 20:17:34,390 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 43 transitions. Word has length 37 [2022-04-06 20:17:34,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:17:34,390 INFO L478 AbstractCegarLoop]: Abstraction has 43 states and 43 transitions. [2022-04-06 20:17:34,390 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.4) internal successors, (34), 9 states have internal predecessors, (34), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:17:34,390 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 43 transitions. [2022-04-06 20:17:34,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-04-06 20:17:34,391 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:17:34,391 INFO L499 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:17:34,410 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-04-06 20:17:34,604 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:17:34,605 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:17:34,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:17:34,605 INFO L85 PathProgramCache]: Analyzing trace with hash -313664917, now seen corresponding path program 11 times [2022-04-06 20:17:34,605 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:17:34,606 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1496682170] [2022-04-06 20:17:34,606 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 20:17:34,606 INFO L85 PathProgramCache]: Analyzing trace with hash -313664917, now seen corresponding path program 12 times [2022-04-06 20:17:34,606 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:17:34,607 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1194166567] [2022-04-06 20:17:34,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:17:34,607 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:17:34,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:17:34,743 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:17:34,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:17:34,747 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 0 proven. 93 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:17:34,748 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:17:34,748 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1194166567] [2022-04-06 20:17:34,748 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1194166567] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:17:34,748 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [942270943] [2022-04-06 20:17:34,748 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:17:34,748 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:17:34,748 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:17:34,749 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:17:34,775 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-04-06 20:17:38,831 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-04-06 20:17:38,831 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:17:38,848 INFO L263 TraceCheckSpWp]: Trace formula consists of 645 conjuncts, 101 conjunts are in the unsatisfiable core [2022-04-06 20:17:38,851 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:17:45,260 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-04-06 20:17:45,261 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 43 select indices, 43 select index equivalence classes, 861 disjoint index pairs (out of 903 index pairs), introduced 43 new quantified variables, introduced 903 case distinctions, treesize of input 306 treesize of output 634 [2022-04-06 20:21:57,856 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 15 proven. 23 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-04-06 20:21:57,856 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:21:58,705 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-04-06 20:21:58,705 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [942270943] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:21:58,706 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:21:58,706 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 8] total 25 [2022-04-06 20:21:58,706 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:21:58,706 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1496682170] [2022-04-06 20:21:58,706 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1496682170] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:21:58,706 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:21:58,706 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-04-06 20:21:58,706 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2070065486] [2022-04-06 20:21:58,706 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:21:58,707 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-04-06 20:21:58,707 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:21:58,707 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-04-06 20:21:58,707 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=502, Unknown=0, NotChecked=0, Total=600 [2022-04-06 20:21:58,707 INFO L87 Difference]: Start difference. First operand 43 states and 43 transitions. Second operand has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 10 states have internal predecessors, (39), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:21:59,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:21:59,008 INFO L93 Difference]: Finished difference Result 54 states and 54 transitions. [2022-04-06 20:21:59,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-04-06 20:21:59,009 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 10 states have internal predecessors, (39), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 42 [2022-04-06 20:21:59,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:21:59,009 INFO L225 Difference]: With dead ends: 54 [2022-04-06 20:21:59,009 INFO L226 Difference]: Without dead ends: 51 [2022-04-06 20:21:59,010 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=184, Invalid=938, Unknown=0, NotChecked=0, Total=1122 [2022-04-06 20:21:59,010 INFO L913 BasicCegarLoop]: 17 mSDtfsCounter, 24 mSDsluCounter, 104 mSDsCounter, 0 mSdLazyCounter, 254 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 121 SdHoareTripleChecker+Invalid, 270 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 254 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:21:59,011 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [24 Valid, 121 Invalid, 270 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 254 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:21:59,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2022-04-06 20:21:59,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 48. [2022-04-06 20:21:59,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 44 states have (on average 1.0227272727272727) internal successors, (45), 44 states have internal predecessors, (45), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:21:59,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 48 transitions. [2022-04-06 20:21:59,016 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 48 transitions. Word has length 42 [2022-04-06 20:21:59,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:21:59,016 INFO L478 AbstractCegarLoop]: Abstraction has 48 states and 48 transitions. [2022-04-06 20:21:59,016 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 10 states have internal predecessors, (39), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:21:59,016 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 48 transitions. [2022-04-06 20:21:59,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-04-06 20:21:59,016 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:21:59,017 INFO L499 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:21:59,047 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-04-06 20:21:59,231 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:21:59,231 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:21:59,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:21:59,232 INFO L85 PathProgramCache]: Analyzing trace with hash 461457331, now seen corresponding path program 13 times [2022-04-06 20:21:59,232 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:21:59,233 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1010314270] [2022-04-06 20:21:59,234 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 20:21:59,234 INFO L85 PathProgramCache]: Analyzing trace with hash 461457331, now seen corresponding path program 14 times [2022-04-06 20:21:59,234 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:21:59,234 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [407644751] [2022-04-06 20:21:59,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:21:59,234 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:21:59,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:21:59,407 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:21:59,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:21:59,411 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:21:59,411 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:21:59,411 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [407644751] [2022-04-06 20:21:59,411 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [407644751] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:21:59,411 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1785994094] [2022-04-06 20:21:59,411 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:21:59,412 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:21:59,412 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:21:59,412 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:21:59,413 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-04-06 20:21:59,609 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:21:59,610 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:21:59,613 INFO L263 TraceCheckSpWp]: Trace formula consists of 711 conjuncts, 19 conjunts are in the unsatisfiable core [2022-04-06 20:21:59,616 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:21:59,769 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:21:59,769 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:21:59,971 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:21:59,972 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1785994094] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:21:59,972 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:21:59,972 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 22 [2022-04-06 20:21:59,972 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:21:59,972 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1010314270] [2022-04-06 20:21:59,972 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1010314270] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:21:59,972 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:21:59,972 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-04-06 20:21:59,972 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2019953671] [2022-04-06 20:21:59,973 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:21:59,973 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-04-06 20:21:59,973 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:21:59,973 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-04-06 20:21:59,973 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=354, Unknown=0, NotChecked=0, Total=462 [2022-04-06 20:21:59,973 INFO L87 Difference]: Start difference. First operand 48 states and 48 transitions. Second operand has 12 states, 12 states have (on average 3.6666666666666665) internal successors, (44), 11 states have internal predecessors, (44), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:22:00,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:22:00,255 INFO L93 Difference]: Finished difference Result 59 states and 59 transitions. [2022-04-06 20:22:00,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-04-06 20:22:00,255 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.6666666666666665) internal successors, (44), 11 states have internal predecessors, (44), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 47 [2022-04-06 20:22:00,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:22:00,256 INFO L225 Difference]: With dead ends: 59 [2022-04-06 20:22:00,256 INFO L226 Difference]: Without dead ends: 56 [2022-04-06 20:22:00,257 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 85 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=233, Invalid=759, Unknown=0, NotChecked=0, Total=992 [2022-04-06 20:22:00,257 INFO L913 BasicCegarLoop]: 18 mSDtfsCounter, 26 mSDsluCounter, 126 mSDsCounter, 0 mSdLazyCounter, 321 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 144 SdHoareTripleChecker+Invalid, 339 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 321 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 20:22:00,257 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 144 Invalid, 339 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 321 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 20:22:00,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2022-04-06 20:22:00,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 53. [2022-04-06 20:22:00,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 49 states have (on average 1.0204081632653061) internal successors, (50), 49 states have internal predecessors, (50), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:22:00,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 53 transitions. [2022-04-06 20:22:00,263 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 53 transitions. Word has length 47 [2022-04-06 20:22:00,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:22:00,263 INFO L478 AbstractCegarLoop]: Abstraction has 53 states and 53 transitions. [2022-04-06 20:22:00,263 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.6666666666666665) internal successors, (44), 11 states have internal predecessors, (44), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:22:00,263 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 53 transitions. [2022-04-06 20:22:00,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-04-06 20:22:00,264 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:22:00,264 INFO L499 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:22:00,293 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-04-06 20:22:00,477 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:22:00,477 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:22:00,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:22:00,478 INFO L85 PathProgramCache]: Analyzing trace with hash 1346824043, now seen corresponding path program 15 times [2022-04-06 20:22:00,478 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:22:00,478 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [298023389] [2022-04-06 20:22:00,478 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 20:22:00,478 INFO L85 PathProgramCache]: Analyzing trace with hash 1346824043, now seen corresponding path program 16 times [2022-04-06 20:22:00,478 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:22:00,478 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1033180398] [2022-04-06 20:22:00,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:22:00,479 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:22:00,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:22:00,623 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:22:00,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:22:00,627 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 0 proven. 164 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:22:00,627 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:22:00,627 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1033180398] [2022-04-06 20:22:00,627 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1033180398] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:22:00,627 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1416056557] [2022-04-06 20:22:00,627 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:22:00,627 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:22:00,627 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:22:00,644 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:22:00,680 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-04-06 20:22:00,868 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:22:00,869 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:22:00,871 INFO L263 TraceCheckSpWp]: Trace formula consists of 733 conjuncts, 21 conjunts are in the unsatisfiable core [2022-04-06 20:22:00,873 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:22:00,973 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 0 proven. 164 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:22:00,973 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:22:01,134 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 0 proven. 164 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:22:01,135 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1416056557] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:22:01,135 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:22:01,135 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 24 [2022-04-06 20:22:01,135 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:22:01,135 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [298023389] [2022-04-06 20:22:01,135 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [298023389] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:22:01,135 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:22:01,136 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-04-06 20:22:01,136 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1628223480] [2022-04-06 20:22:01,136 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:22:01,136 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-04-06 20:22:01,136 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:22:01,136 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-04-06 20:22:01,136 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=423, Unknown=0, NotChecked=0, Total=552 [2022-04-06 20:22:01,137 INFO L87 Difference]: Start difference. First operand 53 states and 53 transitions. Second operand has 13 states, 13 states have (on average 3.769230769230769) internal successors, (49), 12 states have internal predecessors, (49), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:22:01,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:22:01,395 INFO L93 Difference]: Finished difference Result 64 states and 64 transitions. [2022-04-06 20:22:01,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-04-06 20:22:01,401 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.769230769230769) internal successors, (49), 12 states have internal predecessors, (49), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 52 [2022-04-06 20:22:01,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:22:01,401 INFO L225 Difference]: With dead ends: 64 [2022-04-06 20:22:01,401 INFO L226 Difference]: Without dead ends: 61 [2022-04-06 20:22:01,402 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 94 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=277, Invalid=913, Unknown=0, NotChecked=0, Total=1190 [2022-04-06 20:22:01,402 INFO L913 BasicCegarLoop]: 19 mSDtfsCounter, 28 mSDsluCounter, 150 mSDsCounter, 0 mSdLazyCounter, 396 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 169 SdHoareTripleChecker+Invalid, 416 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 396 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 20:22:01,403 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 169 Invalid, 416 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 396 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 20:22:01,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2022-04-06 20:22:01,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 58. [2022-04-06 20:22:01,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 54 states have (on average 1.0185185185185186) internal successors, (55), 54 states have internal predecessors, (55), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:22:01,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 58 transitions. [2022-04-06 20:22:01,408 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 58 transitions. Word has length 52 [2022-04-06 20:22:01,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:22:01,409 INFO L478 AbstractCegarLoop]: Abstraction has 58 states and 58 transitions. [2022-04-06 20:22:01,409 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.769230769230769) internal successors, (49), 12 states have internal predecessors, (49), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:22:01,409 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 58 transitions. [2022-04-06 20:22:01,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-04-06 20:22:01,410 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:22:01,410 INFO L499 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:22:01,429 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-04-06 20:22:01,619 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2022-04-06 20:22:01,620 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:22:01,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:22:01,620 INFO L85 PathProgramCache]: Analyzing trace with hash -618112333, now seen corresponding path program 17 times [2022-04-06 20:22:01,620 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:22:01,620 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1243225469] [2022-04-06 20:22:01,622 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 20:22:01,622 INFO L85 PathProgramCache]: Analyzing trace with hash -618112333, now seen corresponding path program 18 times [2022-04-06 20:22:01,622 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:22:01,622 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [713621339] [2022-04-06 20:22:01,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:22:01,623 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:22:01,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:22:01,879 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:22:01,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:22:01,902 INFO L134 CoverageAnalysis]: Checked inductivity of 207 backedges. 0 proven. 207 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:22:01,902 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:22:01,902 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [713621339] [2022-04-06 20:22:01,902 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [713621339] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:22:01,902 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1533259740] [2022-04-06 20:22:01,902 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:22:01,902 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:22:01,903 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:22:01,903 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:22:01,905 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-04-06 20:22:02,274 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-04-06 20:22:02,274 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:22:02,277 INFO L263 TraceCheckSpWp]: Trace formula consists of 645 conjuncts, 19 conjunts are in the unsatisfiable core [2022-04-06 20:22:02,279 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:22:02,389 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-04-06 20:22:02,389 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 23