/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/acceleratedInterpolationJordan_32.epf -i ../../../trunk/examples/svcomp/nla-digbench-scaling/fermat2-ll_unwindbound100.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-5d317bd [2022-03-19 04:51:55,620 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-19 04:51:55,643 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-19 04:51:55,668 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-03-19 04:51:55,674 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-03-19 04:51:55,674 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-03-19 04:51:55,675 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-03-19 04:51:55,676 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-03-19 04:51:55,676 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-03-19 04:51:55,677 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-03-19 04:51:55,678 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-03-19 04:51:55,679 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-03-19 04:51:55,680 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-03-19 04:51:55,683 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-03-19 04:51:55,683 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-03-19 04:51:55,684 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-03-19 04:51:55,685 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-03-19 04:51:55,686 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-03-19 04:51:55,691 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-03-19 04:51:55,693 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-03-19 04:51:55,695 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-03-19 04:51:55,696 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationJordan_32.epf [2022-03-19 04:51:55,705 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-19 04:51:55,705 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-19 04:51:55,707 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-19 04:51:55,707 INFO L138 SettingsManager]: * sizeof long=4 [2022-03-19 04:51:55,708 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-19 04:51:55,708 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-03-19 04:51:55,708 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-19 04:51:55,708 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-19 04:51:55,708 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-19 04:51:55,708 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-19 04:51:55,708 INFO L138 SettingsManager]: * sizeof long double=12 [2022-03-19 04:51:55,709 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-19 04:51:55,709 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-19 04:51:55,709 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-19 04:51:55,709 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-19 04:51:55,709 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-19 04:51:55,709 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-03-19 04:51:55,709 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-19 04:51:55,709 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-19 04:51:55,709 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-19 04:51:55,709 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=Craig_NestedInterpolation [2022-03-19 04:51:55,709 INFO L138 SettingsManager]: * Trace refinement strategy=ACCELERATED_INTERPOLATION [2022-03-19 04:51:55,709 INFO L138 SettingsManager]: * Trace refinement strategy used in Accelerated Interpolation=CAMEL [2022-03-19 04:51:55,710 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-03-19 04:51:55,710 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=JORDAN [2022-03-19 04:51:55,710 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-03-19 04:51:55,886 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-19 04:51:55,897 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-19 04:51:55,899 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-19 04:51:55,900 INFO L271 PluginConnector]: Initializing CDTParser... [2022-03-19 04:51:55,902 INFO L275 PluginConnector]: CDTParser initialized [2022-03-19 04:51:55,902 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/fermat2-ll_unwindbound100.c [2022-03-19 04:51:55,948 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/20f784422/197a19e4ae894a1a92aabe7f72e28f1a/FLAG625f4758a [2022-03-19 04:51:56,310 INFO L306 CDTParser]: Found 1 translation units. [2022-03-19 04:51:56,311 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/fermat2-ll_unwindbound100.c [2022-03-19 04:51:56,316 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/20f784422/197a19e4ae894a1a92aabe7f72e28f1a/FLAG625f4758a [2022-03-19 04:51:56,333 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/20f784422/197a19e4ae894a1a92aabe7f72e28f1a [2022-03-19 04:51:56,335 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-19 04:51:56,337 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-03-19 04:51:56,339 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-03-19 04:51:56,339 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-03-19 04:51:56,341 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-03-19 04:51:56,342 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.03 04:51:56" (1/1) ... [2022-03-19 04:51:56,343 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7e74c8b4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 04:51:56, skipping insertion in model container [2022-03-19 04:51:56,343 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.03 04:51:56" (1/1) ... [2022-03-19 04:51:56,348 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-03-19 04:51:56,361 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-03-19 04:51:56,526 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/fermat2-ll_unwindbound100.c[524,537] [2022-03-19 04:51:56,551 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-19 04:51:56,558 INFO L203 MainTranslator]: Completed pre-run [2022-03-19 04:51:56,568 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/fermat2-ll_unwindbound100.c[524,537] [2022-03-19 04:51:56,582 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-19 04:51:56,592 INFO L208 MainTranslator]: Completed translation [2022-03-19 04:51:56,592 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 04:51:56 WrapperNode [2022-03-19 04:51:56,593 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-03-19 04:51:56,593 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-19 04:51:56,594 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-19 04:51:56,594 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-19 04:51:56,601 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 04:51:56" (1/1) ... [2022-03-19 04:51:56,602 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 04:51:56" (1/1) ... [2022-03-19 04:51:56,607 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 04:51:56" (1/1) ... [2022-03-19 04:51:56,608 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 04:51:56" (1/1) ... [2022-03-19 04:51:56,615 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 04:51:56" (1/1) ... [2022-03-19 04:51:56,619 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 04:51:56" (1/1) ... [2022-03-19 04:51:56,621 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 04:51:56" (1/1) ... [2022-03-19 04:51:56,624 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-19 04:51:56,625 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-19 04:51:56,625 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-19 04:51:56,625 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-19 04:51:56,625 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 04:51:56" (1/1) ... [2022-03-19 04:51:56,631 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-19 04:51:56,637 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 04:51:56,646 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) [2022-03-19 04:51:56,660 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 [2022-03-19 04:51:56,676 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-03-19 04:51:56,676 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-19 04:51:56,677 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-03-19 04:51:56,677 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-03-19 04:51:56,677 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-03-19 04:51:56,677 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-03-19 04:51:56,677 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-03-19 04:51:56,677 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-03-19 04:51:56,677 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-03-19 04:51:56,677 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-03-19 04:51:56,677 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-03-19 04:51:56,678 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-03-19 04:51:56,678 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-03-19 04:51:56,679 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-03-19 04:51:56,679 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-03-19 04:51:56,679 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-03-19 04:51:56,679 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-19 04:51:56,679 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-03-19 04:51:56,679 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-03-19 04:51:56,679 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-03-19 04:51:56,726 INFO L234 CfgBuilder]: Building ICFG [2022-03-19 04:51:56,728 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-19 04:51:56,863 INFO L275 CfgBuilder]: Performing block encoding [2022-03-19 04:51:56,867 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-19 04:51:56,867 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-03-19 04:51:56,868 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.03 04:51:56 BoogieIcfgContainer [2022-03-19 04:51:56,868 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-19 04:51:56,869 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-19 04:51:56,869 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-19 04:51:56,885 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-19 04:51:56,885 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.03 04:51:56" (1/3) ... [2022-03-19 04:51:56,885 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5298dbb1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.03 04:51:56, skipping insertion in model container [2022-03-19 04:51:56,886 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 04:51:56" (2/3) ... [2022-03-19 04:51:56,886 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5298dbb1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.03 04:51:56, skipping insertion in model container [2022-03-19 04:51:56,886 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.03 04:51:56" (3/3) ... [2022-03-19 04:51:56,887 INFO L111 eAbstractionObserver]: Analyzing ICFG fermat2-ll_unwindbound100.c [2022-03-19 04:51:56,890 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-03-19 04:51:56,890 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-19 04:51:56,917 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-19 04:51:56,923 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 [2022-03-19 04:51:56,924 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-03-19 04:51:56,933 INFO L276 IsEmpty]: Start isEmpty. Operand has 30 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 19 states have internal predecessors, (25), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-03-19 04:51:56,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-19 04:51:56,937 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 04:51:56,937 INFO L500 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 04:51:56,938 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 04:51:56,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 04:51:56,945 INFO L85 PathProgramCache]: Analyzing trace with hash -1859024204, now seen corresponding path program 1 times [2022-03-19 04:51:56,950 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 04:51:56,950 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [487198320] [2022-03-19 04:51:56,957 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 04:51:56,958 INFO L85 PathProgramCache]: Analyzing trace with hash -1859024204, now seen corresponding path program 2 times [2022-03-19 04:51:56,959 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 04:51:56,960 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [828561826] [2022-03-19 04:51:56,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 04:51:56,960 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 04:51:57,047 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 04:51:57,048 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1783589957] [2022-03-19 04:51:57,048 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 04:51:57,048 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 04:51:57,048 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 04:51:57,049 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) [2022-03-19 04:51:57,050 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-03-19 04:51:57,108 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-03-19 04:51:57,108 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 04:51:57,110 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 1 conjunts are in the unsatisfiable core [2022-03-19 04:51:57,112 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 04:51:57,159 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-19 04:51:57,159 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-19 04:51:57,160 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 04:51:57,160 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [828561826] [2022-03-19 04:51:57,160 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 04:51:57,160 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1783589957] [2022-03-19 04:51:57,160 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1783589957] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 04:51:57,161 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 04:51:57,161 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-03-19 04:51:57,163 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 04:51:57,163 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [487198320] [2022-03-19 04:51:57,163 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [487198320] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 04:51:57,163 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 04:51:57,163 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-03-19 04:51:57,163 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [704755112] [2022-03-19 04:51:57,164 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 04:51:57,166 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-03-19 04:51:57,166 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 04:51:57,186 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-03-19 04:51:57,187 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-03-19 04:51:57,188 INFO L87 Difference]: Start difference. First operand has 30 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 19 states have internal predecessors, (25), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Second operand has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-03-19 04:51:57,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 04:51:57,208 INFO L93 Difference]: Finished difference Result 53 states and 70 transitions. [2022-03-19 04:51:57,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-03-19 04:51:57,209 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 22 [2022-03-19 04:51:57,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 04:51:57,214 INFO L225 Difference]: With dead ends: 53 [2022-03-19 04:51:57,214 INFO L226 Difference]: Without dead ends: 25 [2022-03-19 04:51:57,216 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-03-19 04:51:57,219 INFO L912 BasicCegarLoop]: 34 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-19 04:51:57,220 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-19 04:51:57,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2022-03-19 04:51:57,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2022-03-19 04:51:57,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 15 states have (on average 1.2666666666666666) internal successors, (19), 16 states have internal predecessors, (19), 6 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-03-19 04:51:57,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 29 transitions. [2022-03-19 04:51:57,249 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 29 transitions. Word has length 22 [2022-03-19 04:51:57,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 04:51:57,249 INFO L478 AbstractCegarLoop]: Abstraction has 25 states and 29 transitions. [2022-03-19 04:51:57,250 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-03-19 04:51:57,250 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 29 transitions. [2022-03-19 04:51:57,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-19 04:51:57,251 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 04:51:57,252 INFO L500 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 04:51:57,270 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-03-19 04:51:57,459 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2022-03-19 04:51:57,460 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 04:51:57,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 04:51:57,460 INFO L85 PathProgramCache]: Analyzing trace with hash 243739414, now seen corresponding path program 1 times [2022-03-19 04:51:57,460 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 04:51:57,461 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [305636730] [2022-03-19 04:51:57,461 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 04:51:57,461 INFO L85 PathProgramCache]: Analyzing trace with hash 243739414, now seen corresponding path program 2 times [2022-03-19 04:51:57,461 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 04:51:57,461 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [900535646] [2022-03-19 04:51:57,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 04:51:57,462 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 04:51:57,471 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 04:51:57,471 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2015763328] [2022-03-19 04:51:57,471 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 04:51:57,471 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 04:51:57,471 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 04:51:57,476 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) [2022-03-19 04:51:57,477 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-03-19 04:51:57,510 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-03-19 04:51:57,511 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 04:51:57,511 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 5 conjunts are in the unsatisfiable core [2022-03-19 04:51:57,513 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 04:51:57,613 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-19 04:51:57,613 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-19 04:51:57,613 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 04:51:57,613 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [900535646] [2022-03-19 04:51:57,614 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 04:51:57,614 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2015763328] [2022-03-19 04:51:57,614 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2015763328] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 04:51:57,614 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 04:51:57,614 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-19 04:51:57,614 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 04:51:57,615 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [305636730] [2022-03-19 04:51:57,615 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [305636730] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 04:51:57,615 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 04:51:57,615 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-19 04:51:57,615 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1186294673] [2022-03-19 04:51:57,615 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 04:51:57,616 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-19 04:51:57,616 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 04:51:57,616 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-19 04:51:57,616 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-19 04:51:57,616 INFO L87 Difference]: Start difference. First operand 25 states and 29 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-19 04:51:57,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 04:51:57,627 INFO L93 Difference]: Finished difference Result 34 states and 38 transitions. [2022-03-19 04:51:57,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-19 04:51:57,627 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 23 [2022-03-19 04:51:57,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 04:51:57,628 INFO L225 Difference]: With dead ends: 34 [2022-03-19 04:51:57,628 INFO L226 Difference]: Without dead ends: 27 [2022-03-19 04:51:57,628 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-19 04:51:57,629 INFO L912 BasicCegarLoop]: 27 mSDtfsCounter, 0 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-19 04:51:57,629 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 67 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-19 04:51:57,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2022-03-19 04:51:57,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2022-03-19 04:51:57,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 18 states have internal predecessors, (21), 6 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-03-19 04:51:57,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 31 transitions. [2022-03-19 04:51:57,634 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 31 transitions. Word has length 23 [2022-03-19 04:51:57,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 04:51:57,635 INFO L478 AbstractCegarLoop]: Abstraction has 27 states and 31 transitions. [2022-03-19 04:51:57,635 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-19 04:51:57,635 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 31 transitions. [2022-03-19 04:51:57,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-19 04:51:57,636 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 04:51:57,636 INFO L500 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 04:51:57,653 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-03-19 04:51:57,843 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,SelfDestructingSolverStorable1 [2022-03-19 04:51:57,844 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 04:51:57,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 04:51:57,852 INFO L85 PathProgramCache]: Analyzing trace with hash 245526874, now seen corresponding path program 1 times [2022-03-19 04:51:57,853 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 04:51:57,853 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1715749730] [2022-03-19 04:51:57,853 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 04:51:57,853 INFO L85 PathProgramCache]: Analyzing trace with hash 245526874, now seen corresponding path program 2 times [2022-03-19 04:51:57,854 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 04:51:57,854 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [956536422] [2022-03-19 04:51:57,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 04:51:57,854 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 04:51:57,862 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 04:51:57,863 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1711380247] [2022-03-19 04:51:57,863 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 04:51:57,863 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 04:51:57,863 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 04:51:57,866 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) [2022-03-19 04:51:57,867 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-03-19 04:51:57,904 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-03-19 04:51:57,904 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 04:51:57,905 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 11 conjunts are in the unsatisfiable core [2022-03-19 04:51:57,908 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 04:51:58,601 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-19 04:51:58,602 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-19 04:51:58,602 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 04:51:58,602 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [956536422] [2022-03-19 04:51:58,602 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 04:51:58,602 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1711380247] [2022-03-19 04:51:58,602 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1711380247] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 04:51:58,603 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 04:51:58,603 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-19 04:51:58,603 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 04:51:58,603 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1715749730] [2022-03-19 04:51:58,603 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1715749730] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 04:51:58,603 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 04:51:58,603 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-19 04:51:58,604 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1569668043] [2022-03-19 04:51:58,604 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 04:51:58,604 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-19 04:51:58,604 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 04:51:58,604 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-19 04:51:58,605 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-19 04:51:58,605 INFO L87 Difference]: Start difference. First operand 27 states and 31 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-03-19 04:52:00,214 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.57s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-19 04:52:00,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 04:52:00,228 INFO L93 Difference]: Finished difference Result 39 states and 46 transitions. [2022-03-19 04:52:00,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-19 04:52:00,228 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 23 [2022-03-19 04:52:00,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 04:52:00,229 INFO L225 Difference]: With dead ends: 39 [2022-03-19 04:52:00,229 INFO L226 Difference]: Without dead ends: 37 [2022-03-19 04:52:00,230 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-03-19 04:52:00,230 INFO L912 BasicCegarLoop]: 24 mSDtfsCounter, 8 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 91 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-03-19 04:52:00,231 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 91 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-03-19 04:52:00,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2022-03-19 04:52:00,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 36. [2022-03-19 04:52:00,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 24 states have (on average 1.2916666666666667) internal successors, (31), 25 states have internal predecessors, (31), 7 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-03-19 04:52:00,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 43 transitions. [2022-03-19 04:52:00,238 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 43 transitions. Word has length 23 [2022-03-19 04:52:00,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 04:52:00,238 INFO L478 AbstractCegarLoop]: Abstraction has 36 states and 43 transitions. [2022-03-19 04:52:00,239 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-03-19 04:52:00,239 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 43 transitions. [2022-03-19 04:52:00,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-03-19 04:52:00,239 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 04:52:00,239 INFO L500 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 04:52:00,256 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-03-19 04:52:00,455 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 04:52:00,458 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 04:52:00,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 04:52:00,458 INFO L85 PathProgramCache]: Analyzing trace with hash -1019533657, now seen corresponding path program 1 times [2022-03-19 04:52:00,463 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 04:52:00,463 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1218025578] [2022-03-19 04:52:00,464 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 04:52:00,464 INFO L85 PathProgramCache]: Analyzing trace with hash -1019533657, now seen corresponding path program 2 times [2022-03-19 04:52:00,464 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 04:52:00,464 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [119763630] [2022-03-19 04:52:00,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 04:52:00,465 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 04:52:00,481 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 04:52:00,481 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1957648377] [2022-03-19 04:52:00,481 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 04:52:00,481 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 04:52:00,482 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 04:52:00,484 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) [2022-03-19 04:52:00,485 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-03-19 04:52:00,521 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 04:52:00,521 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 04:52:00,522 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 10 conjunts are in the unsatisfiable core [2022-03-19 04:52:00,523 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 04:52:00,651 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-19 04:52:00,651 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 04:52:00,821 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-19 04:52:00,821 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 04:52:00,821 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [119763630] [2022-03-19 04:52:00,822 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 04:52:00,823 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1957648377] [2022-03-19 04:52:00,823 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1957648377] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 04:52:00,823 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 04:52:00,824 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2022-03-19 04:52:00,824 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 04:52:00,824 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1218025578] [2022-03-19 04:52:00,824 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1218025578] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 04:52:00,824 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 04:52:00,824 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-19 04:52:00,824 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1925640810] [2022-03-19 04:52:00,825 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 04:52:00,825 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-19 04:52:00,825 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 04:52:00,825 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-19 04:52:00,826 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2022-03-19 04:52:00,826 INFO L87 Difference]: Start difference. First operand 36 states and 43 transitions. Second operand has 8 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2022-03-19 04:52:00,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 04:52:00,919 INFO L93 Difference]: Finished difference Result 43 states and 49 transitions. [2022-03-19 04:52:00,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-19 04:52:00,920 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) Word has length 29 [2022-03-19 04:52:00,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 04:52:00,921 INFO L225 Difference]: With dead ends: 43 [2022-03-19 04:52:00,921 INFO L226 Difference]: Without dead ends: 38 [2022-03-19 04:52:00,923 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 48 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2022-03-19 04:52:00,924 INFO L912 BasicCegarLoop]: 21 mSDtfsCounter, 17 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 113 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-19 04:52:00,925 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 113 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-19 04:52:00,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2022-03-19 04:52:00,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 29. [2022-03-19 04:52:00,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 19 states have (on average 1.105263157894737) internal successors, (21), 19 states have internal predecessors, (21), 6 states have call successors, (6), 5 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-03-19 04:52:00,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 31 transitions. [2022-03-19 04:52:00,940 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 31 transitions. Word has length 29 [2022-03-19 04:52:00,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 04:52:00,940 INFO L478 AbstractCegarLoop]: Abstraction has 29 states and 31 transitions. [2022-03-19 04:52:00,941 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2022-03-19 04:52:00,941 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 31 transitions. [2022-03-19 04:52:00,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-03-19 04:52:00,942 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 04:52:00,942 INFO L500 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 04:52:00,961 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-03-19 04:52:01,159 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 04:52:01,159 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 04:52:01,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 04:52:01,160 INFO L85 PathProgramCache]: Analyzing trace with hash 1080225052, now seen corresponding path program 1 times [2022-03-19 04:52:01,160 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 04:52:01,160 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [624143875] [2022-03-19 04:52:01,161 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 04:52:01,161 INFO L85 PathProgramCache]: Analyzing trace with hash 1080225052, now seen corresponding path program 2 times [2022-03-19 04:52:01,161 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 04:52:01,161 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [913420115] [2022-03-19 04:52:01,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 04:52:01,161 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 04:52:01,169 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 04:52:01,169 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1477699923] [2022-03-19 04:52:01,169 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 04:52:01,169 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 04:52:01,169 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 04:52:01,170 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) [2022-03-19 04:52:01,171 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-03-19 04:52:01,204 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 04:52:01,205 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 04:52:01,206 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-19 04:52:01,207 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 04:52:01,273 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-19 04:52:01,273 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 04:52:01,350 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-19 04:52:01,350 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 04:52:01,350 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [913420115] [2022-03-19 04:52:01,350 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 04:52:01,350 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1477699923] [2022-03-19 04:52:01,350 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1477699923] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 04:52:01,350 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 04:52:01,350 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2022-03-19 04:52:01,351 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 04:52:01,351 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [624143875] [2022-03-19 04:52:01,351 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [624143875] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 04:52:01,351 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 04:52:01,351 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-19 04:52:01,351 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1478472185] [2022-03-19 04:52:01,351 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 04:52:01,351 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-19 04:52:01,351 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 04:52:01,352 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-19 04:52:01,352 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2022-03-19 04:52:01,352 INFO L87 Difference]: Start difference. First operand 29 states and 31 transitions. Second operand has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 4 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) [2022-03-19 04:52:01,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 04:52:01,381 INFO L93 Difference]: Finished difference Result 43 states and 46 transitions. [2022-03-19 04:52:01,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-19 04:52:01,381 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 4 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) Word has length 32 [2022-03-19 04:52:01,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 04:52:01,383 INFO L225 Difference]: With dead ends: 43 [2022-03-19 04:52:01,383 INFO L226 Difference]: Without dead ends: 38 [2022-03-19 04:52:01,384 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2022-03-19 04:52:01,384 INFO L912 BasicCegarLoop]: 27 mSDtfsCounter, 7 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-19 04:52:01,384 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 78 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-19 04:52:01,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2022-03-19 04:52:01,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2022-03-19 04:52:01,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 26 states have (on average 1.1153846153846154) internal successors, (29), 26 states have internal predecessors, (29), 7 states have call successors, (7), 6 states have call predecessors, (7), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-03-19 04:52:01,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 41 transitions. [2022-03-19 04:52:01,396 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 41 transitions. Word has length 32 [2022-03-19 04:52:01,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 04:52:01,396 INFO L478 AbstractCegarLoop]: Abstraction has 38 states and 41 transitions. [2022-03-19 04:52:01,396 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 4 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) [2022-03-19 04:52:01,397 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 41 transitions. [2022-03-19 04:52:01,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-03-19 04:52:01,398 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 04:52:01,398 INFO L500 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 04:52:01,415 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-03-19 04:52:01,614 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 04:52:01,615 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 04:52:01,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 04:52:01,615 INFO L85 PathProgramCache]: Analyzing trace with hash 1448743382, now seen corresponding path program 3 times [2022-03-19 04:52:01,616 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 04:52:01,616 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [28667996] [2022-03-19 04:52:01,616 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 04:52:01,616 INFO L85 PathProgramCache]: Analyzing trace with hash 1448743382, now seen corresponding path program 4 times [2022-03-19 04:52:01,616 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 04:52:01,616 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1762733116] [2022-03-19 04:52:01,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 04:52:01,617 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 04:52:01,630 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 04:52:01,630 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [192535321] [2022-03-19 04:52:01,630 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 04:52:01,630 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 04:52:01,630 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 04:52:01,635 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) [2022-03-19 04:52:01,636 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-03-19 04:52:01,697 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 04:52:01,697 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 04:52:01,698 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-19 04:52:01,700 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 04:52:01,784 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 4 proven. 13 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-19 04:52:01,785 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 04:52:01,882 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-03-19 04:52:01,882 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 04:52:01,882 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1762733116] [2022-03-19 04:52:01,882 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 04:52:01,882 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [192535321] [2022-03-19 04:52:01,882 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [192535321] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 04:52:01,883 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 04:52:01,883 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2022-03-19 04:52:01,883 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 04:52:01,883 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [28667996] [2022-03-19 04:52:01,883 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [28667996] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 04:52:01,883 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 04:52:01,883 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-19 04:52:01,883 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1945014338] [2022-03-19 04:52:01,883 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 04:52:01,883 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-19 04:52:01,884 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 04:52:01,884 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-19 04:52:01,884 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2022-03-19 04:52:01,884 INFO L87 Difference]: Start difference. First operand 38 states and 41 transitions. Second operand has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 5 states have internal predecessors, (26), 5 states have call successors, (7), 5 states have call predecessors, (7), 3 states have return successors, (5), 3 states have call predecessors, (5), 4 states have call successors, (5) [2022-03-19 04:52:01,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 04:52:01,931 INFO L93 Difference]: Finished difference Result 52 states and 56 transitions. [2022-03-19 04:52:01,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-19 04:52:01,932 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 5 states have internal predecessors, (26), 5 states have call successors, (7), 5 states have call predecessors, (7), 3 states have return successors, (5), 3 states have call predecessors, (5), 4 states have call successors, (5) Word has length 41 [2022-03-19 04:52:01,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 04:52:01,934 INFO L225 Difference]: With dead ends: 52 [2022-03-19 04:52:01,934 INFO L226 Difference]: Without dead ends: 47 [2022-03-19 04:52:01,934 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=51, Invalid=81, Unknown=0, NotChecked=0, Total=132 [2022-03-19 04:52:01,936 INFO L912 BasicCegarLoop]: 28 mSDtfsCounter, 15 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-19 04:52:01,936 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 86 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-19 04:52:01,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2022-03-19 04:52:01,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2022-03-19 04:52:01,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 33 states have (on average 1.121212121212121) internal successors, (37), 33 states have internal predecessors, (37), 8 states have call successors, (8), 7 states have call predecessors, (8), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-03-19 04:52:01,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 51 transitions. [2022-03-19 04:52:01,949 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 51 transitions. Word has length 41 [2022-03-19 04:52:01,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 04:52:01,949 INFO L478 AbstractCegarLoop]: Abstraction has 47 states and 51 transitions. [2022-03-19 04:52:01,950 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 5 states have internal predecessors, (26), 5 states have call successors, (7), 5 states have call predecessors, (7), 3 states have return successors, (5), 3 states have call predecessors, (5), 4 states have call successors, (5) [2022-03-19 04:52:01,950 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 51 transitions. [2022-03-19 04:52:01,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-03-19 04:52:01,950 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 04:52:01,950 INFO L500 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 04:52:01,968 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-03-19 04:52:02,157 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 04:52:02,158 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 04:52:02,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 04:52:02,158 INFO L85 PathProgramCache]: Analyzing trace with hash -678977956, now seen corresponding path program 5 times [2022-03-19 04:52:02,158 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 04:52:02,158 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [371023497] [2022-03-19 04:52:02,158 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 04:52:02,159 INFO L85 PathProgramCache]: Analyzing trace with hash -678977956, now seen corresponding path program 6 times [2022-03-19 04:52:02,159 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 04:52:02,159 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1694828382] [2022-03-19 04:52:02,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 04:52:02,159 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 04:52:02,165 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 04:52:02,165 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [531765573] [2022-03-19 04:52:02,166 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-19 04:52:02,166 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 04:52:02,166 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 04:52:02,168 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) [2022-03-19 04:52:02,169 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-03-19 04:52:02,216 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-19 04:52:02,216 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 04:52:02,217 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 11 conjunts are in the unsatisfiable core [2022-03-19 04:52:02,219 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 04:52:02,316 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 6 proven. 33 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-19 04:52:02,317 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 04:52:02,423 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 6 proven. 21 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-03-19 04:52:02,423 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 04:52:02,423 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1694828382] [2022-03-19 04:52:02,423 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 04:52:02,423 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [531765573] [2022-03-19 04:52:02,423 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [531765573] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 04:52:02,423 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 04:52:02,423 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2022-03-19 04:52:02,424 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 04:52:02,424 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [371023497] [2022-03-19 04:52:02,424 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [371023497] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 04:52:02,424 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 04:52:02,424 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-03-19 04:52:02,424 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [798232925] [2022-03-19 04:52:02,424 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 04:52:02,424 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-03-19 04:52:02,424 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 04:52:02,425 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-03-19 04:52:02,425 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2022-03-19 04:52:02,425 INFO L87 Difference]: Start difference. First operand 47 states and 51 transitions. Second operand has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 6 states have internal predecessors, (33), 6 states have call successors, (8), 6 states have call predecessors, (8), 4 states have return successors, (6), 4 states have call predecessors, (6), 5 states have call successors, (6) [2022-03-19 04:52:02,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 04:52:02,487 INFO L93 Difference]: Finished difference Result 61 states and 66 transitions. [2022-03-19 04:52:02,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-19 04:52:02,487 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 6 states have internal predecessors, (33), 6 states have call successors, (8), 6 states have call predecessors, (8), 4 states have return successors, (6), 4 states have call predecessors, (6), 5 states have call successors, (6) Word has length 50 [2022-03-19 04:52:02,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 04:52:02,488 INFO L225 Difference]: With dead ends: 61 [2022-03-19 04:52:02,488 INFO L226 Difference]: Without dead ends: 56 [2022-03-19 04:52:02,488 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=83, Invalid=127, Unknown=0, NotChecked=0, Total=210 [2022-03-19 04:52:02,488 INFO L912 BasicCegarLoop]: 29 mSDtfsCounter, 10 mSDsluCounter, 71 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-19 04:52:02,489 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 100 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-19 04:52:02,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2022-03-19 04:52:02,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2022-03-19 04:52:02,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 40 states have (on average 1.125) internal successors, (45), 40 states have internal predecessors, (45), 9 states have call successors, (9), 8 states have call predecessors, (9), 6 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-03-19 04:52:02,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 61 transitions. [2022-03-19 04:52:02,516 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 61 transitions. Word has length 50 [2022-03-19 04:52:02,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 04:52:02,516 INFO L478 AbstractCegarLoop]: Abstraction has 56 states and 61 transitions. [2022-03-19 04:52:02,516 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 6 states have internal predecessors, (33), 6 states have call successors, (8), 6 states have call predecessors, (8), 4 states have return successors, (6), 4 states have call predecessors, (6), 5 states have call successors, (6) [2022-03-19 04:52:02,516 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 61 transitions. [2022-03-19 04:52:02,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-03-19 04:52:02,517 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 04:52:02,517 INFO L500 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 04:52:02,551 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-03-19 04:52:02,717 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 04:52:02,718 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 04:52:02,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 04:52:02,718 INFO L85 PathProgramCache]: Analyzing trace with hash 1632159894, now seen corresponding path program 7 times [2022-03-19 04:52:02,718 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 04:52:02,718 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [670078981] [2022-03-19 04:52:02,719 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 04:52:02,719 INFO L85 PathProgramCache]: Analyzing trace with hash 1632159894, now seen corresponding path program 8 times [2022-03-19 04:52:02,719 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 04:52:02,719 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1243472045] [2022-03-19 04:52:02,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 04:52:02,719 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 04:52:02,726 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 04:52:02,726 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [629901033] [2022-03-19 04:52:02,726 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 04:52:02,726 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 04:52:02,726 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 04:52:02,727 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) [2022-03-19 04:52:02,728 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-03-19 04:52:02,763 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 04:52:02,764 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 04:52:02,764 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 13 conjunts are in the unsatisfiable core [2022-03-19 04:52:02,766 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 04:52:02,890 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 8 proven. 62 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-19 04:52:02,890 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 04:52:03,039 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 8 proven. 38 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-03-19 04:52:03,040 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 04:52:03,040 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1243472045] [2022-03-19 04:52:03,040 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 04:52:03,040 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [629901033] [2022-03-19 04:52:03,040 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [629901033] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 04:52:03,040 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 04:52:03,040 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2022-03-19 04:52:03,040 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 04:52:03,040 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [670078981] [2022-03-19 04:52:03,040 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [670078981] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 04:52:03,041 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 04:52:03,041 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-19 04:52:03,041 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1533884431] [2022-03-19 04:52:03,041 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 04:52:03,041 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-19 04:52:03,041 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 04:52:03,041 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-19 04:52:03,042 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2022-03-19 04:52:03,042 INFO L87 Difference]: Start difference. First operand 56 states and 61 transitions. Second operand has 8 states, 8 states have (on average 5.0) internal successors, (40), 7 states have internal predecessors, (40), 7 states have call successors, (9), 7 states have call predecessors, (9), 5 states have return successors, (7), 5 states have call predecessors, (7), 6 states have call successors, (7) [2022-03-19 04:52:03,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 04:52:03,108 INFO L93 Difference]: Finished difference Result 70 states and 76 transitions. [2022-03-19 04:52:03,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-19 04:52:03,109 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.0) internal successors, (40), 7 states have internal predecessors, (40), 7 states have call successors, (9), 7 states have call predecessors, (9), 5 states have return successors, (7), 5 states have call predecessors, (7), 6 states have call successors, (7) Word has length 59 [2022-03-19 04:52:03,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 04:52:03,109 INFO L225 Difference]: With dead ends: 70 [2022-03-19 04:52:03,109 INFO L226 Difference]: Without dead ends: 65 [2022-03-19 04:52:03,110 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=123, Invalid=183, Unknown=0, NotChecked=0, Total=306 [2022-03-19 04:52:03,110 INFO L912 BasicCegarLoop]: 30 mSDtfsCounter, 11 mSDsluCounter, 84 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 114 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-19 04:52:03,110 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 114 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-19 04:52:03,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2022-03-19 04:52:03,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2022-03-19 04:52:03,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 47 states have (on average 1.127659574468085) internal successors, (53), 47 states have internal predecessors, (53), 10 states have call successors, (10), 9 states have call predecessors, (10), 7 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-03-19 04:52:03,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 71 transitions. [2022-03-19 04:52:03,119 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 71 transitions. Word has length 59 [2022-03-19 04:52:03,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 04:52:03,120 INFO L478 AbstractCegarLoop]: Abstraction has 65 states and 71 transitions. [2022-03-19 04:52:03,120 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.0) internal successors, (40), 7 states have internal predecessors, (40), 7 states have call successors, (9), 7 states have call predecessors, (9), 5 states have return successors, (7), 5 states have call predecessors, (7), 6 states have call successors, (7) [2022-03-19 04:52:03,120 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 71 transitions. [2022-03-19 04:52:03,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-03-19 04:52:03,120 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 04:52:03,121 INFO L500 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 5, 5, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 04:52:03,139 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-03-19 04:52:03,331 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,SelfDestructingSolverStorable7 [2022-03-19 04:52:03,331 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 04:52:03,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 04:52:03,332 INFO L85 PathProgramCache]: Analyzing trace with hash -1512407140, now seen corresponding path program 9 times [2022-03-19 04:52:03,332 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 04:52:03,332 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1501034043] [2022-03-19 04:52:03,332 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 04:52:03,332 INFO L85 PathProgramCache]: Analyzing trace with hash -1512407140, now seen corresponding path program 10 times [2022-03-19 04:52:03,332 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 04:52:03,333 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1453859953] [2022-03-19 04:52:03,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 04:52:03,333 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 04:52:03,339 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 04:52:03,339 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1336472547] [2022-03-19 04:52:03,339 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 04:52:03,339 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 04:52:03,339 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 04:52:03,341 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) [2022-03-19 04:52:03,342 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-03-19 04:52:03,479 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 04:52:03,479 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 04:52:03,480 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 15 conjunts are in the unsatisfiable core [2022-03-19 04:52:03,482 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 04:52:03,597 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 10 proven. 100 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-19 04:52:03,597 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 04:52:03,753 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 10 proven. 60 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2022-03-19 04:52:03,753 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 04:52:03,753 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1453859953] [2022-03-19 04:52:03,753 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 04:52:03,753 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1336472547] [2022-03-19 04:52:03,753 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1336472547] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 04:52:03,754 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 04:52:03,754 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2022-03-19 04:52:03,754 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 04:52:03,754 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1501034043] [2022-03-19 04:52:03,754 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1501034043] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 04:52:03,754 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 04:52:03,754 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-03-19 04:52:03,754 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [496131342] [2022-03-19 04:52:03,754 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 04:52:03,755 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-19 04:52:03,755 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 04:52:03,755 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-19 04:52:03,755 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=144, Unknown=0, NotChecked=0, Total=240 [2022-03-19 04:52:03,755 INFO L87 Difference]: Start difference. First operand 65 states and 71 transitions. Second operand has 9 states, 9 states have (on average 5.222222222222222) internal successors, (47), 8 states have internal predecessors, (47), 8 states have call successors, (10), 8 states have call predecessors, (10), 6 states have return successors, (8), 6 states have call predecessors, (8), 7 states have call successors, (8) [2022-03-19 04:52:03,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 04:52:03,820 INFO L93 Difference]: Finished difference Result 79 states and 86 transitions. [2022-03-19 04:52:03,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-19 04:52:03,821 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.222222222222222) internal successors, (47), 8 states have internal predecessors, (47), 8 states have call successors, (10), 8 states have call predecessors, (10), 6 states have return successors, (8), 6 states have call predecessors, (8), 7 states have call successors, (8) Word has length 68 [2022-03-19 04:52:03,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 04:52:03,821 INFO L225 Difference]: With dead ends: 79 [2022-03-19 04:52:03,821 INFO L226 Difference]: Without dead ends: 74 [2022-03-19 04:52:03,822 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 121 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=171, Invalid=249, Unknown=0, NotChecked=0, Total=420 [2022-03-19 04:52:03,822 INFO L912 BasicCegarLoop]: 31 mSDtfsCounter, 19 mSDsluCounter, 85 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 116 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-19 04:52:03,822 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 116 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-19 04:52:03,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2022-03-19 04:52:03,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 74. [2022-03-19 04:52:03,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 54 states have (on average 1.1296296296296295) internal successors, (61), 54 states have internal predecessors, (61), 11 states have call successors, (11), 10 states have call predecessors, (11), 8 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-03-19 04:52:03,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 81 transitions. [2022-03-19 04:52:03,831 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 81 transitions. Word has length 68 [2022-03-19 04:52:03,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 04:52:03,831 INFO L478 AbstractCegarLoop]: Abstraction has 74 states and 81 transitions. [2022-03-19 04:52:03,831 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.222222222222222) internal successors, (47), 8 states have internal predecessors, (47), 8 states have call successors, (10), 8 states have call predecessors, (10), 6 states have return successors, (8), 6 states have call predecessors, (8), 7 states have call successors, (8) [2022-03-19 04:52:03,831 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 81 transitions. [2022-03-19 04:52:03,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2022-03-19 04:52:03,832 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 04:52:03,832 INFO L500 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 6, 6, 6, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 04:52:03,851 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-03-19 04:52:04,048 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 04:52:04,049 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 04:52:04,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 04:52:04,049 INFO L85 PathProgramCache]: Analyzing trace with hash 771706710, now seen corresponding path program 11 times [2022-03-19 04:52:04,049 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 04:52:04,049 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1792099053] [2022-03-19 04:52:04,050 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 04:52:04,050 INFO L85 PathProgramCache]: Analyzing trace with hash 771706710, now seen corresponding path program 12 times [2022-03-19 04:52:04,050 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 04:52:04,050 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [956740454] [2022-03-19 04:52:04,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 04:52:04,050 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 04:52:04,056 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 04:52:04,056 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1203630157] [2022-03-19 04:52:04,056 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-19 04:52:04,056 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 04:52:04,056 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 04:52:04,057 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 04:52:04,061 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-03-19 04:52:04,173 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-03-19 04:52:04,173 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 04:52:04,175 INFO L263 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 17 conjunts are in the unsatisfiable core [2022-03-19 04:52:04,176 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 04:52:04,326 INFO L134 CoverageAnalysis]: Checked inductivity of 163 backedges. 12 proven. 147 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-19 04:52:04,327 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 04:52:04,518 INFO L134 CoverageAnalysis]: Checked inductivity of 163 backedges. 12 proven. 87 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2022-03-19 04:52:04,518 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 04:52:04,518 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [956740454] [2022-03-19 04:52:04,518 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 04:52:04,518 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1203630157] [2022-03-19 04:52:04,518 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1203630157] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 04:52:04,518 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 04:52:04,519 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2022-03-19 04:52:04,519 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 04:52:04,520 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1792099053] [2022-03-19 04:52:04,520 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1792099053] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 04:52:04,520 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 04:52:04,520 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-03-19 04:52:04,520 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [161936185] [2022-03-19 04:52:04,520 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 04:52:04,520 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-19 04:52:04,520 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 04:52:04,521 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-19 04:52:04,521 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=181, Unknown=0, NotChecked=0, Total=306 [2022-03-19 04:52:04,521 INFO L87 Difference]: Start difference. First operand 74 states and 81 transitions. Second operand has 10 states, 10 states have (on average 5.4) internal successors, (54), 9 states have internal predecessors, (54), 9 states have call successors, (11), 9 states have call predecessors, (11), 7 states have return successors, (9), 7 states have call predecessors, (9), 8 states have call successors, (9) [2022-03-19 04:52:04,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 04:52:04,607 INFO L93 Difference]: Finished difference Result 88 states and 96 transitions. [2022-03-19 04:52:04,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-19 04:52:04,607 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.4) internal successors, (54), 9 states have internal predecessors, (54), 9 states have call successors, (11), 9 states have call predecessors, (11), 7 states have return successors, (9), 7 states have call predecessors, (9), 8 states have call successors, (9) Word has length 77 [2022-03-19 04:52:04,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 04:52:04,608 INFO L225 Difference]: With dead ends: 88 [2022-03-19 04:52:04,608 INFO L226 Difference]: Without dead ends: 83 [2022-03-19 04:52:04,609 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 137 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=227, Invalid=325, Unknown=0, NotChecked=0, Total=552 [2022-03-19 04:52:04,609 INFO L912 BasicCegarLoop]: 32 mSDtfsCounter, 29 mSDsluCounter, 86 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 118 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-19 04:52:04,609 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 118 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-19 04:52:04,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2022-03-19 04:52:04,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2022-03-19 04:52:04,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 61 states have (on average 1.1311475409836065) internal successors, (69), 61 states have internal predecessors, (69), 12 states have call successors, (12), 11 states have call predecessors, (12), 9 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-03-19 04:52:04,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 91 transitions. [2022-03-19 04:52:04,631 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 91 transitions. Word has length 77 [2022-03-19 04:52:04,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 04:52:04,632 INFO L478 AbstractCegarLoop]: Abstraction has 83 states and 91 transitions. [2022-03-19 04:52:04,632 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.4) internal successors, (54), 9 states have internal predecessors, (54), 9 states have call successors, (11), 9 states have call predecessors, (11), 7 states have return successors, (9), 7 states have call predecessors, (9), 8 states have call successors, (9) [2022-03-19 04:52:04,632 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 91 transitions. [2022-03-19 04:52:04,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2022-03-19 04:52:04,633 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 04:52:04,633 INFO L500 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 7, 7, 7, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 04:52:04,639 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2022-03-19 04:52:04,837 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-03-19 04:52:04,838 INFO L403 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 04:52:04,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 04:52:04,838 INFO L85 PathProgramCache]: Analyzing trace with hash 1848611036, now seen corresponding path program 13 times [2022-03-19 04:52:04,838 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 04:52:04,838 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [798760192] [2022-03-19 04:52:04,838 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 04:52:04,838 INFO L85 PathProgramCache]: Analyzing trace with hash 1848611036, now seen corresponding path program 14 times [2022-03-19 04:52:04,839 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 04:52:04,839 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [542775650] [2022-03-19 04:52:04,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 04:52:04,839 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 04:52:04,845 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 04:52:04,845 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [375320624] [2022-03-19 04:52:04,845 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 04:52:04,845 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 04:52:04,845 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 04:52:04,846 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 04:52:04,847 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-03-19 04:52:04,889 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 04:52:04,889 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 04:52:04,890 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 19 conjunts are in the unsatisfiable core [2022-03-19 04:52:04,892 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 04:52:05,042 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 14 proven. 203 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-19 04:52:05,042 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 04:52:05,240 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 14 proven. 119 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2022-03-19 04:52:05,241 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 04:52:05,241 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [542775650] [2022-03-19 04:52:05,241 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 04:52:05,241 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [375320624] [2022-03-19 04:52:05,241 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [375320624] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 04:52:05,241 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 04:52:05,241 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2022-03-19 04:52:05,241 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 04:52:05,241 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [798760192] [2022-03-19 04:52:05,241 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [798760192] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 04:52:05,241 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 04:52:05,241 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-03-19 04:52:05,242 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1245255966] [2022-03-19 04:52:05,242 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 04:52:05,242 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-19 04:52:05,242 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 04:52:05,242 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-19 04:52:05,242 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=222, Unknown=0, NotChecked=0, Total=380 [2022-03-19 04:52:05,243 INFO L87 Difference]: Start difference. First operand 83 states and 91 transitions. Second operand has 11 states, 11 states have (on average 5.545454545454546) internal successors, (61), 10 states have internal predecessors, (61), 10 states have call successors, (12), 10 states have call predecessors, (12), 8 states have return successors, (10), 8 states have call predecessors, (10), 9 states have call successors, (10) [2022-03-19 04:52:05,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 04:52:05,336 INFO L93 Difference]: Finished difference Result 97 states and 106 transitions. [2022-03-19 04:52:05,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-03-19 04:52:05,337 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.545454545454546) internal successors, (61), 10 states have internal predecessors, (61), 10 states have call successors, (12), 10 states have call predecessors, (12), 8 states have return successors, (10), 8 states have call predecessors, (10), 9 states have call successors, (10) Word has length 86 [2022-03-19 04:52:05,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 04:52:05,338 INFO L225 Difference]: With dead ends: 97 [2022-03-19 04:52:05,338 INFO L226 Difference]: Without dead ends: 92 [2022-03-19 04:52:05,338 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 153 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=291, Invalid=411, Unknown=0, NotChecked=0, Total=702 [2022-03-19 04:52:05,338 INFO L912 BasicCegarLoop]: 33 mSDtfsCounter, 23 mSDsluCounter, 105 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 138 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-19 04:52:05,339 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 138 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-19 04:52:05,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2022-03-19 04:52:05,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 92. [2022-03-19 04:52:05,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 68 states have (on average 1.1323529411764706) internal successors, (77), 68 states have internal predecessors, (77), 13 states have call successors, (13), 12 states have call predecessors, (13), 10 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2022-03-19 04:52:05,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 101 transitions. [2022-03-19 04:52:05,348 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 101 transitions. Word has length 86 [2022-03-19 04:52:05,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 04:52:05,348 INFO L478 AbstractCegarLoop]: Abstraction has 92 states and 101 transitions. [2022-03-19 04:52:05,348 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 5.545454545454546) internal successors, (61), 10 states have internal predecessors, (61), 10 states have call successors, (12), 10 states have call predecessors, (12), 8 states have return successors, (10), 8 states have call predecessors, (10), 9 states have call successors, (10) [2022-03-19 04:52:05,348 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 101 transitions. [2022-03-19 04:52:05,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2022-03-19 04:52:05,349 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 04:52:05,349 INFO L500 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 8, 8, 8, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 04:52:05,366 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-03-19 04:52:05,566 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-03-19 04:52:05,566 INFO L403 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 04:52:05,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 04:52:05,566 INFO L85 PathProgramCache]: Analyzing trace with hash -399923690, now seen corresponding path program 15 times [2022-03-19 04:52:05,567 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 04:52:05,567 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1511406328] [2022-03-19 04:52:05,567 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 04:52:05,567 INFO L85 PathProgramCache]: Analyzing trace with hash -399923690, now seen corresponding path program 16 times [2022-03-19 04:52:05,567 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 04:52:05,567 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1333967727] [2022-03-19 04:52:05,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 04:52:05,567 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 04:52:05,573 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 04:52:05,573 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [14323951] [2022-03-19 04:52:05,574 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 04:52:05,574 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 04:52:05,574 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 04:52:05,575 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 04:52:05,576 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-03-19 04:52:05,674 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 04:52:05,674 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 04:52:05,675 INFO L263 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-19 04:52:05,677 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 04:52:05,833 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 16 proven. 268 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-19 04:52:05,833 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 04:52:06,053 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 16 proven. 156 refuted. 0 times theorem prover too weak. 116 trivial. 0 not checked. [2022-03-19 04:52:06,053 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 04:52:06,053 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1333967727] [2022-03-19 04:52:06,053 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 04:52:06,053 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [14323951] [2022-03-19 04:52:06,053 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [14323951] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 04:52:06,053 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 04:52:06,053 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2022-03-19 04:52:06,054 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 04:52:06,054 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1511406328] [2022-03-19 04:52:06,054 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1511406328] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 04:52:06,054 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 04:52:06,054 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-03-19 04:52:06,054 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2064086724] [2022-03-19 04:52:06,054 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 04:52:06,054 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-19 04:52:06,054 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 04:52:06,055 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-19 04:52:06,055 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=195, Invalid=267, Unknown=0, NotChecked=0, Total=462 [2022-03-19 04:52:06,055 INFO L87 Difference]: Start difference. First operand 92 states and 101 transitions. Second operand has 12 states, 12 states have (on average 5.666666666666667) internal successors, (68), 11 states have internal predecessors, (68), 11 states have call successors, (13), 11 states have call predecessors, (13), 9 states have return successors, (11), 9 states have call predecessors, (11), 10 states have call successors, (11) [2022-03-19 04:52:06,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 04:52:06,150 INFO L93 Difference]: Finished difference Result 106 states and 116 transitions. [2022-03-19 04:52:06,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-03-19 04:52:06,150 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 5.666666666666667) internal successors, (68), 11 states have internal predecessors, (68), 11 states have call successors, (13), 11 states have call predecessors, (13), 9 states have return successors, (11), 9 states have call predecessors, (11), 10 states have call successors, (11) Word has length 95 [2022-03-19 04:52:06,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 04:52:06,151 INFO L225 Difference]: With dead ends: 106 [2022-03-19 04:52:06,151 INFO L226 Difference]: Without dead ends: 101 [2022-03-19 04:52:06,152 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 169 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=363, Invalid=507, Unknown=0, NotChecked=0, Total=870 [2022-03-19 04:52:06,152 INFO L912 BasicCegarLoop]: 34 mSDtfsCounter, 18 mSDsluCounter, 118 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 152 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-19 04:52:06,152 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 152 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-19 04:52:06,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2022-03-19 04:52:06,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 101. [2022-03-19 04:52:06,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 75 states have (on average 1.1333333333333333) internal successors, (85), 75 states have internal predecessors, (85), 14 states have call successors, (14), 13 states have call predecessors, (14), 11 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2022-03-19 04:52:06,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 111 transitions. [2022-03-19 04:52:06,162 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 111 transitions. Word has length 95 [2022-03-19 04:52:06,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 04:52:06,162 INFO L478 AbstractCegarLoop]: Abstraction has 101 states and 111 transitions. [2022-03-19 04:52:06,162 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 5.666666666666667) internal successors, (68), 11 states have internal predecessors, (68), 11 states have call successors, (13), 11 states have call predecessors, (13), 9 states have return successors, (11), 9 states have call predecessors, (11), 10 states have call successors, (11) [2022-03-19 04:52:06,162 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 111 transitions. [2022-03-19 04:52:06,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2022-03-19 04:52:06,163 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 04:52:06,163 INFO L500 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 9, 9, 9, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 04:52:06,180 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-03-19 04:52:06,380 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-03-19 04:52:06,380 INFO L403 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 04:52:06,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 04:52:06,380 INFO L85 PathProgramCache]: Analyzing trace with hash 1717228060, now seen corresponding path program 17 times [2022-03-19 04:52:06,380 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 04:52:06,381 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2013636592] [2022-03-19 04:52:06,381 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 04:52:06,381 INFO L85 PathProgramCache]: Analyzing trace with hash 1717228060, now seen corresponding path program 18 times [2022-03-19 04:52:06,381 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 04:52:06,381 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [722033122] [2022-03-19 04:52:06,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 04:52:06,381 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 04:52:06,387 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 04:52:06,387 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1540088472] [2022-03-19 04:52:06,387 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-19 04:52:06,387 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 04:52:06,387 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 04:52:06,388 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 04:52:06,416 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-03-19 04:52:06,544 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2022-03-19 04:52:06,544 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 04:52:06,546 INFO L263 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 23 conjunts are in the unsatisfiable core [2022-03-19 04:52:06,549 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 04:52:06,777 INFO L134 CoverageAnalysis]: Checked inductivity of 364 backedges. 18 proven. 342 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-19 04:52:06,777 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 04:52:07,054 INFO L134 CoverageAnalysis]: Checked inductivity of 364 backedges. 18 proven. 198 refuted. 0 times theorem prover too weak. 148 trivial. 0 not checked. [2022-03-19 04:52:07,055 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 04:52:07,055 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [722033122] [2022-03-19 04:52:07,055 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 04:52:07,055 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1540088472] [2022-03-19 04:52:07,055 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1540088472] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 04:52:07,055 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 04:52:07,055 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2022-03-19 04:52:07,055 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 04:52:07,055 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2013636592] [2022-03-19 04:52:07,056 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2013636592] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 04:52:07,056 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 04:52:07,056 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-03-19 04:52:07,056 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [246192698] [2022-03-19 04:52:07,056 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 04:52:07,056 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-19 04:52:07,056 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 04:52:07,056 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-19 04:52:07,057 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=316, Unknown=0, NotChecked=0, Total=552 [2022-03-19 04:52:07,057 INFO L87 Difference]: Start difference. First operand 101 states and 111 transitions. Second operand has 13 states, 13 states have (on average 5.769230769230769) internal successors, (75), 12 states have internal predecessors, (75), 12 states have call successors, (14), 12 states have call predecessors, (14), 10 states have return successors, (12), 10 states have call predecessors, (12), 11 states have call successors, (12) [2022-03-19 04:52:07,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 04:52:07,170 INFO L93 Difference]: Finished difference Result 115 states and 126 transitions. [2022-03-19 04:52:07,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-03-19 04:52:07,175 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 5.769230769230769) internal successors, (75), 12 states have internal predecessors, (75), 12 states have call successors, (14), 12 states have call predecessors, (14), 10 states have return successors, (12), 10 states have call predecessors, (12), 11 states have call successors, (12) Word has length 104 [2022-03-19 04:52:07,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 04:52:07,176 INFO L225 Difference]: With dead ends: 115 [2022-03-19 04:52:07,176 INFO L226 Difference]: Without dead ends: 110 [2022-03-19 04:52:07,176 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 216 GetRequests, 185 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=443, Invalid=613, Unknown=0, NotChecked=0, Total=1056 [2022-03-19 04:52:07,177 INFO L912 BasicCegarLoop]: 35 mSDtfsCounter, 35 mSDsluCounter, 113 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 148 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 04:52:07,177 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 148 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 04:52:07,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2022-03-19 04:52:07,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 110. [2022-03-19 04:52:07,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 82 states have (on average 1.1341463414634145) internal successors, (93), 82 states have internal predecessors, (93), 15 states have call successors, (15), 14 states have call predecessors, (15), 12 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2022-03-19 04:52:07,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 121 transitions. [2022-03-19 04:52:07,187 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 121 transitions. Word has length 104 [2022-03-19 04:52:07,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 04:52:07,187 INFO L478 AbstractCegarLoop]: Abstraction has 110 states and 121 transitions. [2022-03-19 04:52:07,187 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 5.769230769230769) internal successors, (75), 12 states have internal predecessors, (75), 12 states have call successors, (14), 12 states have call predecessors, (14), 10 states have return successors, (12), 10 states have call predecessors, (12), 11 states have call successors, (12) [2022-03-19 04:52:07,187 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 121 transitions. [2022-03-19 04:52:07,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2022-03-19 04:52:07,188 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 04:52:07,188 INFO L500 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 10, 10, 10, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 04:52:07,194 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-03-19 04:52:07,392 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-03-19 04:52:07,393 INFO L403 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 04:52:07,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 04:52:07,393 INFO L85 PathProgramCache]: Analyzing trace with hash -1468805930, now seen corresponding path program 19 times [2022-03-19 04:52:07,393 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 04:52:07,393 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [92580025] [2022-03-19 04:52:07,393 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 04:52:07,394 INFO L85 PathProgramCache]: Analyzing trace with hash -1468805930, now seen corresponding path program 20 times [2022-03-19 04:52:07,394 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 04:52:07,394 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1399364897] [2022-03-19 04:52:07,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 04:52:07,394 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 04:52:07,406 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 04:52:07,407 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [371755775] [2022-03-19 04:52:07,407 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 04:52:07,407 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 04:52:07,407 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 04:52:07,408 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 04:52:07,409 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-03-19 04:52:07,457 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 04:52:07,458 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 04:52:07,459 INFO L263 TraceCheckSpWp]: Trace formula consists of 293 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-19 04:52:07,461 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 04:52:07,685 INFO L134 CoverageAnalysis]: Checked inductivity of 449 backedges. 20 proven. 425 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-19 04:52:07,686 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 04:52:07,998 INFO L134 CoverageAnalysis]: Checked inductivity of 449 backedges. 20 proven. 245 refuted. 0 times theorem prover too weak. 184 trivial. 0 not checked. [2022-03-19 04:52:07,998 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 04:52:07,998 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1399364897] [2022-03-19 04:52:07,999 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 04:52:07,999 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [371755775] [2022-03-19 04:52:07,999 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [371755775] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 04:52:07,999 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 04:52:07,999 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2022-03-19 04:52:07,999 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 04:52:07,999 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [92580025] [2022-03-19 04:52:07,999 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [92580025] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 04:52:07,999 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 04:52:07,999 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-03-19 04:52:07,999 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1987329590] [2022-03-19 04:52:07,999 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 04:52:08,000 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-19 04:52:08,000 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 04:52:08,000 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-19 04:52:08,000 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=281, Invalid=369, Unknown=0, NotChecked=0, Total=650 [2022-03-19 04:52:08,001 INFO L87 Difference]: Start difference. First operand 110 states and 121 transitions. Second operand has 14 states, 14 states have (on average 5.857142857142857) internal successors, (82), 13 states have internal predecessors, (82), 13 states have call successors, (15), 13 states have call predecessors, (15), 11 states have return successors, (13), 11 states have call predecessors, (13), 12 states have call successors, (13) [2022-03-19 04:52:08,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 04:52:08,152 INFO L93 Difference]: Finished difference Result 124 states and 136 transitions. [2022-03-19 04:52:08,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-03-19 04:52:08,153 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 5.857142857142857) internal successors, (82), 13 states have internal predecessors, (82), 13 states have call successors, (15), 13 states have call predecessors, (15), 11 states have return successors, (13), 11 states have call predecessors, (13), 12 states have call successors, (13) Word has length 113 [2022-03-19 04:52:08,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 04:52:08,153 INFO L225 Difference]: With dead ends: 124 [2022-03-19 04:52:08,154 INFO L226 Difference]: Without dead ends: 119 [2022-03-19 04:52:08,154 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 235 GetRequests, 201 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=531, Invalid=729, Unknown=0, NotChecked=0, Total=1260 [2022-03-19 04:52:08,154 INFO L912 BasicCegarLoop]: 36 mSDtfsCounter, 47 mSDsluCounter, 114 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 150 SdHoareTripleChecker+Invalid, 87 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 04:52:08,155 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [47 Valid, 150 Invalid, 87 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 04:52:08,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2022-03-19 04:52:08,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 119. [2022-03-19 04:52:08,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 89 states have (on average 1.1348314606741574) internal successors, (101), 89 states have internal predecessors, (101), 16 states have call successors, (16), 15 states have call predecessors, (16), 13 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2022-03-19 04:52:08,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 131 transitions. [2022-03-19 04:52:08,165 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 131 transitions. Word has length 113 [2022-03-19 04:52:08,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 04:52:08,165 INFO L478 AbstractCegarLoop]: Abstraction has 119 states and 131 transitions. [2022-03-19 04:52:08,165 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 5.857142857142857) internal successors, (82), 13 states have internal predecessors, (82), 13 states have call successors, (15), 13 states have call predecessors, (15), 11 states have return successors, (13), 11 states have call predecessors, (13), 12 states have call successors, (13) [2022-03-19 04:52:08,165 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 131 transitions. [2022-03-19 04:52:08,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2022-03-19 04:52:08,166 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 04:52:08,166 INFO L500 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 11, 11, 11, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 04:52:08,183 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-03-19 04:52:08,379 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 04:52:08,379 INFO L403 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 04:52:08,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 04:52:08,380 INFO L85 PathProgramCache]: Analyzing trace with hash 1999651676, now seen corresponding path program 21 times [2022-03-19 04:52:08,380 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 04:52:08,380 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2132790075] [2022-03-19 04:52:08,380 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 04:52:08,380 INFO L85 PathProgramCache]: Analyzing trace with hash 1999651676, now seen corresponding path program 22 times [2022-03-19 04:52:08,380 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 04:52:08,380 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [221886645] [2022-03-19 04:52:08,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 04:52:08,381 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 04:52:08,386 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 04:52:08,386 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [651429388] [2022-03-19 04:52:08,386 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 04:52:08,386 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 04:52:08,387 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 04:52:08,390 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 04:52:08,391 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-03-19 04:52:08,441 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 04:52:08,441 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 04:52:08,442 INFO L263 TraceCheckSpWp]: Trace formula consists of 313 conjuncts, 27 conjunts are in the unsatisfiable core [2022-03-19 04:52:08,444 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 04:52:08,691 INFO L134 CoverageAnalysis]: Checked inductivity of 543 backedges. 22 proven. 517 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-19 04:52:08,691 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 04:52:09,012 INFO L134 CoverageAnalysis]: Checked inductivity of 543 backedges. 22 proven. 297 refuted. 0 times theorem prover too weak. 224 trivial. 0 not checked. [2022-03-19 04:52:09,012 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 04:52:09,012 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [221886645] [2022-03-19 04:52:09,013 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 04:52:09,013 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [651429388] [2022-03-19 04:52:09,013 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [651429388] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 04:52:09,013 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 04:52:09,013 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 28 [2022-03-19 04:52:09,013 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 04:52:09,013 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2132790075] [2022-03-19 04:52:09,013 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2132790075] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 04:52:09,013 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 04:52:09,013 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-03-19 04:52:09,013 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [470973185] [2022-03-19 04:52:09,013 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 04:52:09,014 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-19 04:52:09,014 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 04:52:09,014 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-19 04:52:09,014 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=330, Invalid=426, Unknown=0, NotChecked=0, Total=756 [2022-03-19 04:52:09,015 INFO L87 Difference]: Start difference. First operand 119 states and 131 transitions. Second operand has 15 states, 15 states have (on average 5.933333333333334) internal successors, (89), 14 states have internal predecessors, (89), 14 states have call successors, (16), 14 states have call predecessors, (16), 12 states have return successors, (14), 12 states have call predecessors, (14), 13 states have call successors, (14) [2022-03-19 04:52:09,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 04:52:09,157 INFO L93 Difference]: Finished difference Result 133 states and 146 transitions. [2022-03-19 04:52:09,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-03-19 04:52:09,158 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 5.933333333333334) internal successors, (89), 14 states have internal predecessors, (89), 14 states have call successors, (16), 14 states have call predecessors, (16), 12 states have return successors, (14), 12 states have call predecessors, (14), 13 states have call successors, (14) Word has length 122 [2022-03-19 04:52:09,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 04:52:09,159 INFO L225 Difference]: With dead ends: 133 [2022-03-19 04:52:09,159 INFO L226 Difference]: Without dead ends: 128 [2022-03-19 04:52:09,161 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 254 GetRequests, 217 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=627, Invalid=855, Unknown=0, NotChecked=0, Total=1482 [2022-03-19 04:52:09,161 INFO L912 BasicCegarLoop]: 37 mSDtfsCounter, 28 mSDsluCounter, 133 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 170 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 04:52:09,162 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 170 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 69 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 04:52:09,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2022-03-19 04:52:09,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 128. [2022-03-19 04:52:09,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 96 states have (on average 1.1354166666666667) internal successors, (109), 96 states have internal predecessors, (109), 17 states have call successors, (17), 16 states have call predecessors, (17), 14 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2022-03-19 04:52:09,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 141 transitions. [2022-03-19 04:52:09,175 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 141 transitions. Word has length 122 [2022-03-19 04:52:09,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 04:52:09,175 INFO L478 AbstractCegarLoop]: Abstraction has 128 states and 141 transitions. [2022-03-19 04:52:09,175 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 5.933333333333334) internal successors, (89), 14 states have internal predecessors, (89), 14 states have call successors, (16), 14 states have call predecessors, (16), 12 states have return successors, (14), 12 states have call predecessors, (14), 13 states have call successors, (14) [2022-03-19 04:52:09,175 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 141 transitions. [2022-03-19 04:52:09,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2022-03-19 04:52:09,176 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 04:52:09,176 INFO L500 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 12, 12, 12, 12, 12, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 04:52:09,195 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-03-19 04:52:09,393 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-03-19 04:52:09,401 INFO L403 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 04:52:09,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 04:52:09,401 INFO L85 PathProgramCache]: Analyzing trace with hash 881443734, now seen corresponding path program 23 times [2022-03-19 04:52:09,401 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 04:52:09,401 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1134461354] [2022-03-19 04:52:09,401 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 04:52:09,402 INFO L85 PathProgramCache]: Analyzing trace with hash 881443734, now seen corresponding path program 24 times [2022-03-19 04:52:09,402 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 04:52:09,402 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1325649147] [2022-03-19 04:52:09,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 04:52:09,402 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 04:52:09,413 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 04:52:09,413 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [863066777] [2022-03-19 04:52:09,413 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-19 04:52:09,413 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 04:52:09,413 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 04:52:09,414 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 04:52:09,416 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-03-19 04:52:11,040 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2022-03-19 04:52:11,041 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 04:52:11,044 INFO L263 TraceCheckSpWp]: Trace formula consists of 333 conjuncts, 29 conjunts are in the unsatisfiable core [2022-03-19 04:52:11,046 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 04:52:11,324 INFO L134 CoverageAnalysis]: Checked inductivity of 646 backedges. 24 proven. 618 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-19 04:52:11,325 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 04:52:11,657 INFO L134 CoverageAnalysis]: Checked inductivity of 646 backedges. 24 proven. 354 refuted. 0 times theorem prover too weak. 268 trivial. 0 not checked. [2022-03-19 04:52:11,657 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 04:52:11,657 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1325649147] [2022-03-19 04:52:11,657 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 04:52:11,657 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [863066777] [2022-03-19 04:52:11,657 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [863066777] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 04:52:11,657 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 04:52:11,658 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 30 [2022-03-19 04:52:11,658 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 04:52:11,658 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1134461354] [2022-03-19 04:52:11,658 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1134461354] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 04:52:11,658 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 04:52:11,658 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-03-19 04:52:11,658 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [789748653] [2022-03-19 04:52:11,658 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 04:52:11,658 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-19 04:52:11,658 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 04:52:11,659 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-19 04:52:11,659 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=383, Invalid=487, Unknown=0, NotChecked=0, Total=870 [2022-03-19 04:52:11,659 INFO L87 Difference]: Start difference. First operand 128 states and 141 transitions. Second operand has 16 states, 16 states have (on average 6.0) internal successors, (96), 15 states have internal predecessors, (96), 15 states have call successors, (17), 15 states have call predecessors, (17), 13 states have return successors, (15), 13 states have call predecessors, (15), 14 states have call successors, (15) [2022-03-19 04:52:11,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 04:52:11,836 INFO L93 Difference]: Finished difference Result 142 states and 156 transitions. [2022-03-19 04:52:11,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-03-19 04:52:11,836 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 6.0) internal successors, (96), 15 states have internal predecessors, (96), 15 states have call successors, (17), 15 states have call predecessors, (17), 13 states have return successors, (15), 13 states have call predecessors, (15), 14 states have call successors, (15) Word has length 131 [2022-03-19 04:52:11,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 04:52:11,837 INFO L225 Difference]: With dead ends: 142 [2022-03-19 04:52:11,837 INFO L226 Difference]: Without dead ends: 137 [2022-03-19 04:52:11,837 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 273 GetRequests, 233 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=731, Invalid=991, Unknown=0, NotChecked=0, Total=1722 [2022-03-19 04:52:11,838 INFO L912 BasicCegarLoop]: 38 mSDtfsCounter, 30 mSDsluCounter, 134 mSDsCounter, 0 mSdLazyCounter, 83 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 172 SdHoareTripleChecker+Invalid, 90 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 83 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 04:52:11,838 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 172 Invalid, 90 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 83 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 04:52:11,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2022-03-19 04:52:11,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 137. [2022-03-19 04:52:11,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 103 states have (on average 1.1359223300970873) internal successors, (117), 103 states have internal predecessors, (117), 18 states have call successors, (18), 17 states have call predecessors, (18), 15 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2022-03-19 04:52:11,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 151 transitions. [2022-03-19 04:52:11,849 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 151 transitions. Word has length 131 [2022-03-19 04:52:11,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 04:52:11,850 INFO L478 AbstractCegarLoop]: Abstraction has 137 states and 151 transitions. [2022-03-19 04:52:11,850 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 6.0) internal successors, (96), 15 states have internal predecessors, (96), 15 states have call successors, (17), 15 states have call predecessors, (17), 13 states have return successors, (15), 13 states have call predecessors, (15), 14 states have call successors, (15) [2022-03-19 04:52:11,850 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 151 transitions. [2022-03-19 04:52:11,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2022-03-19 04:52:11,851 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 04:52:11,851 INFO L500 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 13, 13, 13, 13, 13, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 04:52:11,858 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-03-19 04:52:12,053 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-03-19 04:52:12,053 INFO L403 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 04:52:12,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 04:52:12,053 INFO L85 PathProgramCache]: Analyzing trace with hash 2089018524, now seen corresponding path program 25 times [2022-03-19 04:52:12,054 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 04:52:12,054 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1364025460] [2022-03-19 04:52:12,054 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 04:52:12,054 INFO L85 PathProgramCache]: Analyzing trace with hash 2089018524, now seen corresponding path program 26 times [2022-03-19 04:52:12,054 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 04:52:12,054 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [12122869] [2022-03-19 04:52:12,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 04:52:12,054 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 04:52:12,060 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 04:52:12,060 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1440887701] [2022-03-19 04:52:12,060 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 04:52:12,060 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 04:52:12,060 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 04:52:12,064 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 04:52:12,064 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-03-19 04:52:12,115 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 04:52:12,116 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 04:52:12,117 INFO L263 TraceCheckSpWp]: Trace formula consists of 353 conjuncts, 31 conjunts are in the unsatisfiable core [2022-03-19 04:52:12,119 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 04:52:12,382 INFO L134 CoverageAnalysis]: Checked inductivity of 758 backedges. 26 proven. 728 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-19 04:52:12,382 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 04:52:12,787 INFO L134 CoverageAnalysis]: Checked inductivity of 758 backedges. 26 proven. 416 refuted. 0 times theorem prover too weak. 316 trivial. 0 not checked. [2022-03-19 04:52:12,787 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 04:52:12,788 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [12122869] [2022-03-19 04:52:12,788 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 04:52:12,788 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1440887701] [2022-03-19 04:52:12,788 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1440887701] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 04:52:12,788 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 04:52:12,788 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 32 [2022-03-19 04:52:12,788 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 04:52:12,788 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1364025460] [2022-03-19 04:52:12,788 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1364025460] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 04:52:12,788 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 04:52:12,788 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-03-19 04:52:12,788 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [791249456] [2022-03-19 04:52:12,789 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 04:52:12,789 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-19 04:52:12,789 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 04:52:12,789 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-19 04:52:12,789 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=440, Invalid=552, Unknown=0, NotChecked=0, Total=992 [2022-03-19 04:52:12,790 INFO L87 Difference]: Start difference. First operand 137 states and 151 transitions. Second operand has 17 states, 17 states have (on average 6.0588235294117645) internal successors, (103), 16 states have internal predecessors, (103), 16 states have call successors, (18), 16 states have call predecessors, (18), 14 states have return successors, (16), 14 states have call predecessors, (16), 15 states have call successors, (16) [2022-03-19 04:52:12,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 04:52:12,993 INFO L93 Difference]: Finished difference Result 151 states and 166 transitions. [2022-03-19 04:52:12,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-03-19 04:52:12,994 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 6.0588235294117645) internal successors, (103), 16 states have internal predecessors, (103), 16 states have call successors, (18), 16 states have call predecessors, (18), 14 states have return successors, (16), 14 states have call predecessors, (16), 15 states have call successors, (16) Word has length 140 [2022-03-19 04:52:12,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 04:52:12,994 INFO L225 Difference]: With dead ends: 151 [2022-03-19 04:52:12,994 INFO L226 Difference]: Without dead ends: 146 [2022-03-19 04:52:12,995 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 292 GetRequests, 249 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=843, Invalid=1137, Unknown=0, NotChecked=0, Total=1980 [2022-03-19 04:52:12,995 INFO L912 BasicCegarLoop]: 39 mSDtfsCounter, 54 mSDsluCounter, 147 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 186 SdHoareTripleChecker+Invalid, 109 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 81 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 04:52:12,996 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [54 Valid, 186 Invalid, 109 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 81 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 04:52:12,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2022-03-19 04:52:13,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 146. [2022-03-19 04:52:13,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 110 states have (on average 1.1363636363636365) internal successors, (125), 110 states have internal predecessors, (125), 19 states have call successors, (19), 18 states have call predecessors, (19), 16 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2022-03-19 04:52:13,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 161 transitions. [2022-03-19 04:52:13,008 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 161 transitions. Word has length 140 [2022-03-19 04:52:13,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 04:52:13,008 INFO L478 AbstractCegarLoop]: Abstraction has 146 states and 161 transitions. [2022-03-19 04:52:13,008 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 6.0588235294117645) internal successors, (103), 16 states have internal predecessors, (103), 16 states have call successors, (18), 16 states have call predecessors, (18), 14 states have return successors, (16), 14 states have call predecessors, (16), 15 states have call successors, (16) [2022-03-19 04:52:13,009 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 161 transitions. [2022-03-19 04:52:13,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2022-03-19 04:52:13,009 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 04:52:13,009 INFO L500 BasicCegarLoop]: trace histogram [15, 15, 14, 14, 14, 14, 14, 14, 14, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 04:52:13,026 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-03-19 04:52:13,223 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-03-19 04:52:13,223 INFO L403 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 04:52:13,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 04:52:13,224 INFO L85 PathProgramCache]: Analyzing trace with hash -1088976298, now seen corresponding path program 27 times [2022-03-19 04:52:13,224 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 04:52:13,224 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2057544993] [2022-03-19 04:52:13,224 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 04:52:13,224 INFO L85 PathProgramCache]: Analyzing trace with hash -1088976298, now seen corresponding path program 28 times [2022-03-19 04:52:13,224 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 04:52:13,224 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1296567943] [2022-03-19 04:52:13,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 04:52:13,225 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 04:52:13,230 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 04:52:13,230 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1726095670] [2022-03-19 04:52:13,230 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 04:52:13,231 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 04:52:13,231 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 04:52:13,232 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 04:52:13,233 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-03-19 04:52:13,459 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 04:52:13,460 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 04:52:13,461 INFO L263 TraceCheckSpWp]: Trace formula consists of 373 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-19 04:52:13,463 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 04:52:13,745 INFO L134 CoverageAnalysis]: Checked inductivity of 879 backedges. 28 proven. 847 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-19 04:52:13,745 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 04:52:14,135 INFO L134 CoverageAnalysis]: Checked inductivity of 879 backedges. 28 proven. 483 refuted. 0 times theorem prover too weak. 368 trivial. 0 not checked. [2022-03-19 04:52:14,136 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 04:52:14,136 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1296567943] [2022-03-19 04:52:14,136 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 04:52:14,136 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1726095670] [2022-03-19 04:52:14,136 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1726095670] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 04:52:14,136 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 04:52:14,136 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 34 [2022-03-19 04:52:14,136 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 04:52:14,137 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2057544993] [2022-03-19 04:52:14,137 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2057544993] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 04:52:14,137 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 04:52:14,137 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-03-19 04:52:14,137 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1794338585] [2022-03-19 04:52:14,137 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 04:52:14,137 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-19 04:52:14,137 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 04:52:14,137 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-19 04:52:14,138 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=501, Invalid=621, Unknown=0, NotChecked=0, Total=1122 [2022-03-19 04:52:14,138 INFO L87 Difference]: Start difference. First operand 146 states and 161 transitions. Second operand has 18 states, 18 states have (on average 6.111111111111111) internal successors, (110), 17 states have internal predecessors, (110), 17 states have call successors, (19), 17 states have call predecessors, (19), 15 states have return successors, (17), 15 states have call predecessors, (17), 16 states have call successors, (17) [2022-03-19 04:52:14,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 04:52:14,344 INFO L93 Difference]: Finished difference Result 160 states and 176 transitions. [2022-03-19 04:52:14,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-03-19 04:52:14,344 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 6.111111111111111) internal successors, (110), 17 states have internal predecessors, (110), 17 states have call successors, (19), 17 states have call predecessors, (19), 15 states have return successors, (17), 15 states have call predecessors, (17), 16 states have call successors, (17) Word has length 149 [2022-03-19 04:52:14,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 04:52:14,345 INFO L225 Difference]: With dead ends: 160 [2022-03-19 04:52:14,345 INFO L226 Difference]: Without dead ends: 155 [2022-03-19 04:52:14,346 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 311 GetRequests, 265 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=963, Invalid=1293, Unknown=0, NotChecked=0, Total=2256 [2022-03-19 04:52:14,346 INFO L912 BasicCegarLoop]: 40 mSDtfsCounter, 46 mSDsluCounter, 148 mSDsCounter, 0 mSdLazyCounter, 83 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 188 SdHoareTripleChecker+Invalid, 97 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 83 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 04:52:14,346 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [46 Valid, 188 Invalid, 97 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 83 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 04:52:14,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2022-03-19 04:52:14,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 155. [2022-03-19 04:52:14,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 117 states have (on average 1.1367521367521367) internal successors, (133), 117 states have internal predecessors, (133), 20 states have call successors, (20), 19 states have call predecessors, (20), 17 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2022-03-19 04:52:14,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 171 transitions. [2022-03-19 04:52:14,371 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 171 transitions. Word has length 149 [2022-03-19 04:52:14,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 04:52:14,372 INFO L478 AbstractCegarLoop]: Abstraction has 155 states and 171 transitions. [2022-03-19 04:52:14,372 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 6.111111111111111) internal successors, (110), 17 states have internal predecessors, (110), 17 states have call successors, (19), 17 states have call predecessors, (19), 15 states have return successors, (17), 15 states have call predecessors, (17), 16 states have call successors, (17) [2022-03-19 04:52:14,372 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 171 transitions. [2022-03-19 04:52:14,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2022-03-19 04:52:14,373 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 04:52:14,374 INFO L500 BasicCegarLoop]: trace histogram [16, 16, 15, 15, 15, 15, 15, 15, 15, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 04:52:14,381 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-03-19 04:52:14,578 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-03-19 04:52:14,579 INFO L403 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 04:52:14,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 04:52:14,579 INFO L85 PathProgramCache]: Analyzing trace with hash -2060864036, now seen corresponding path program 29 times [2022-03-19 04:52:14,579 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 04:52:14,579 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2051873771] [2022-03-19 04:52:14,580 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 04:52:14,580 INFO L85 PathProgramCache]: Analyzing trace with hash -2060864036, now seen corresponding path program 30 times [2022-03-19 04:52:14,580 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 04:52:14,580 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1202458927] [2022-03-19 04:52:14,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 04:52:14,580 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 04:52:14,595 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 04:52:14,595 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1431650261] [2022-03-19 04:52:14,595 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-19 04:52:14,595 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 04:52:14,595 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 04:52:14,604 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 04:52:14,636 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-03-19 04:52:36,565 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 16 check-sat command(s) [2022-03-19 04:52:36,566 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 04:52:36,580 INFO L263 TraceCheckSpWp]: Trace formula consists of 393 conjuncts, 35 conjunts are in the unsatisfiable core [2022-03-19 04:52:36,583 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 04:52:36,919 INFO L134 CoverageAnalysis]: Checked inductivity of 1009 backedges. 30 proven. 975 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-19 04:52:36,919 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 04:52:37,392 INFO L134 CoverageAnalysis]: Checked inductivity of 1009 backedges. 30 proven. 555 refuted. 0 times theorem prover too weak. 424 trivial. 0 not checked. [2022-03-19 04:52:37,392 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 04:52:37,392 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1202458927] [2022-03-19 04:52:37,392 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 04:52:37,392 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1431650261] [2022-03-19 04:52:37,392 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1431650261] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 04:52:37,392 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 04:52:37,392 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 36 [2022-03-19 04:52:37,393 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 04:52:37,393 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2051873771] [2022-03-19 04:52:37,393 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2051873771] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 04:52:37,393 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 04:52:37,393 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-03-19 04:52:37,393 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [648918130] [2022-03-19 04:52:37,393 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 04:52:37,393 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-19 04:52:37,393 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 04:52:37,394 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-19 04:52:37,394 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=566, Invalid=694, Unknown=0, NotChecked=0, Total=1260 [2022-03-19 04:52:37,394 INFO L87 Difference]: Start difference. First operand 155 states and 171 transitions. Second operand has 19 states, 19 states have (on average 6.157894736842105) internal successors, (117), 18 states have internal predecessors, (117), 18 states have call successors, (20), 18 states have call predecessors, (20), 16 states have return successors, (18), 16 states have call predecessors, (18), 17 states have call successors, (18) [2022-03-19 04:52:37,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 04:52:37,644 INFO L93 Difference]: Finished difference Result 169 states and 186 transitions. [2022-03-19 04:52:37,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-03-19 04:52:37,644 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 6.157894736842105) internal successors, (117), 18 states have internal predecessors, (117), 18 states have call successors, (20), 18 states have call predecessors, (20), 16 states have return successors, (18), 16 states have call predecessors, (18), 17 states have call successors, (18) Word has length 158 [2022-03-19 04:52:37,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 04:52:37,645 INFO L225 Difference]: With dead ends: 169 [2022-03-19 04:52:37,645 INFO L226 Difference]: Without dead ends: 164 [2022-03-19 04:52:37,646 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 330 GetRequests, 281 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=1091, Invalid=1459, Unknown=0, NotChecked=0, Total=2550 [2022-03-19 04:52:37,647 INFO L912 BasicCegarLoop]: 41 mSDtfsCounter, 61 mSDsluCounter, 155 mSDsCounter, 0 mSdLazyCounter, 93 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 196 SdHoareTripleChecker+Invalid, 121 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 93 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 04:52:37,647 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [61 Valid, 196 Invalid, 121 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 93 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 04:52:37,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2022-03-19 04:52:37,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 164. [2022-03-19 04:52:37,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 164 states, 124 states have (on average 1.1370967741935485) internal successors, (141), 124 states have internal predecessors, (141), 21 states have call successors, (21), 20 states have call predecessors, (21), 18 states have return successors, (19), 19 states have call predecessors, (19), 19 states have call successors, (19) [2022-03-19 04:52:37,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 181 transitions. [2022-03-19 04:52:37,661 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 181 transitions. Word has length 158 [2022-03-19 04:52:37,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 04:52:37,662 INFO L478 AbstractCegarLoop]: Abstraction has 164 states and 181 transitions. [2022-03-19 04:52:37,662 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 6.157894736842105) internal successors, (117), 18 states have internal predecessors, (117), 18 states have call successors, (20), 18 states have call predecessors, (20), 16 states have return successors, (18), 16 states have call predecessors, (18), 17 states have call successors, (18) [2022-03-19 04:52:37,662 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 181 transitions. [2022-03-19 04:52:37,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2022-03-19 04:52:37,663 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 04:52:37,663 INFO L500 BasicCegarLoop]: trace histogram [17, 17, 16, 16, 16, 16, 16, 16, 16, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 04:52:37,676 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-03-19 04:52:37,873 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 04:52:37,873 INFO L403 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 04:52:37,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 04:52:37,873 INFO L85 PathProgramCache]: Analyzing trace with hash -1479991018, now seen corresponding path program 31 times [2022-03-19 04:52:37,873 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 04:52:37,873 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2115558239] [2022-03-19 04:52:37,874 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 04:52:37,874 INFO L85 PathProgramCache]: Analyzing trace with hash -1479991018, now seen corresponding path program 32 times [2022-03-19 04:52:37,874 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 04:52:37,874 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1815153169] [2022-03-19 04:52:37,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 04:52:37,874 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 04:52:37,880 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 04:52:37,880 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [894054922] [2022-03-19 04:52:37,880 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 04:52:37,880 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 04:52:37,880 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 04:52:37,881 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 04:52:37,882 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-03-19 04:52:37,963 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 04:52:37,963 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 04:52:37,965 INFO L263 TraceCheckSpWp]: Trace formula consists of 413 conjuncts, 37 conjunts are in the unsatisfiable core [2022-03-19 04:52:37,967 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 04:52:38,306 INFO L134 CoverageAnalysis]: Checked inductivity of 1148 backedges. 32 proven. 1112 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-19 04:52:38,306 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 04:52:38,806 INFO L134 CoverageAnalysis]: Checked inductivity of 1148 backedges. 32 proven. 632 refuted. 0 times theorem prover too weak. 484 trivial. 0 not checked. [2022-03-19 04:52:38,806 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 04:52:38,806 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1815153169] [2022-03-19 04:52:38,806 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 04:52:38,806 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [894054922] [2022-03-19 04:52:38,806 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [894054922] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 04:52:38,807 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 04:52:38,807 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 38 [2022-03-19 04:52:38,807 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 04:52:38,807 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2115558239] [2022-03-19 04:52:38,807 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2115558239] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 04:52:38,807 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 04:52:38,807 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-03-19 04:52:38,807 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [463350245] [2022-03-19 04:52:38,807 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 04:52:38,807 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-19 04:52:38,808 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 04:52:38,808 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-19 04:52:38,808 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=635, Invalid=771, Unknown=0, NotChecked=0, Total=1406 [2022-03-19 04:52:38,808 INFO L87 Difference]: Start difference. First operand 164 states and 181 transitions. Second operand has 20 states, 20 states have (on average 6.2) internal successors, (124), 19 states have internal predecessors, (124), 19 states have call successors, (21), 19 states have call predecessors, (21), 17 states have return successors, (19), 17 states have call predecessors, (19), 18 states have call successors, (19) [2022-03-19 04:52:39,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 04:52:39,028 INFO L93 Difference]: Finished difference Result 178 states and 196 transitions. [2022-03-19 04:52:39,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-03-19 04:52:39,029 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 6.2) internal successors, (124), 19 states have internal predecessors, (124), 19 states have call successors, (21), 19 states have call predecessors, (21), 17 states have return successors, (19), 17 states have call predecessors, (19), 18 states have call successors, (19) Word has length 167 [2022-03-19 04:52:39,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 04:52:39,030 INFO L225 Difference]: With dead ends: 178 [2022-03-19 04:52:39,030 INFO L226 Difference]: Without dead ends: 173 [2022-03-19 04:52:39,031 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 349 GetRequests, 297 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=1227, Invalid=1635, Unknown=0, NotChecked=0, Total=2862 [2022-03-19 04:52:39,031 INFO L912 BasicCegarLoop]: 42 mSDtfsCounter, 58 mSDsluCounter, 162 mSDsCounter, 0 mSdLazyCounter, 101 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 204 SdHoareTripleChecker+Invalid, 115 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 101 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 04:52:39,031 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [58 Valid, 204 Invalid, 115 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 101 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 04:52:39,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2022-03-19 04:52:39,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 173. [2022-03-19 04:52:39,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173 states, 131 states have (on average 1.1374045801526718) internal successors, (149), 131 states have internal predecessors, (149), 22 states have call successors, (22), 21 states have call predecessors, (22), 19 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2022-03-19 04:52:39,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 191 transitions. [2022-03-19 04:52:39,046 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 191 transitions. Word has length 167 [2022-03-19 04:52:39,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 04:52:39,046 INFO L478 AbstractCegarLoop]: Abstraction has 173 states and 191 transitions. [2022-03-19 04:52:39,046 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 6.2) internal successors, (124), 19 states have internal predecessors, (124), 19 states have call successors, (21), 19 states have call predecessors, (21), 17 states have return successors, (19), 17 states have call predecessors, (19), 18 states have call successors, (19) [2022-03-19 04:52:39,046 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 191 transitions. [2022-03-19 04:52:39,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2022-03-19 04:52:39,047 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 04:52:39,047 INFO L500 BasicCegarLoop]: trace histogram [18, 18, 17, 17, 17, 17, 17, 17, 17, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 04:52:39,066 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-03-19 04:52:39,264 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 04:52:39,264 INFO L403 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 04:52:39,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 04:52:39,265 INFO L85 PathProgramCache]: Analyzing trace with hash 318093084, now seen corresponding path program 33 times [2022-03-19 04:52:39,265 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 04:52:39,265 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1809066322] [2022-03-19 04:52:39,265 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 04:52:39,265 INFO L85 PathProgramCache]: Analyzing trace with hash 318093084, now seen corresponding path program 34 times [2022-03-19 04:52:39,265 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 04:52:39,265 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1640468347] [2022-03-19 04:52:39,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 04:52:39,266 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 04:52:39,271 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 04:52:39,272 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [668183026] [2022-03-19 04:52:39,272 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 04:52:39,272 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 04:52:39,272 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 04:52:39,273 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 04:52:39,274 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-03-19 04:52:39,473 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 04:52:39,473 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 04:52:39,475 INFO L263 TraceCheckSpWp]: Trace formula consists of 433 conjuncts, 39 conjunts are in the unsatisfiable core [2022-03-19 04:52:39,477 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 04:52:39,828 INFO L134 CoverageAnalysis]: Checked inductivity of 1296 backedges. 34 proven. 1258 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-19 04:52:39,829 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 04:52:40,368 INFO L134 CoverageAnalysis]: Checked inductivity of 1296 backedges. 34 proven. 714 refuted. 0 times theorem prover too weak. 548 trivial. 0 not checked. [2022-03-19 04:52:40,368 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 04:52:40,368 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1640468347] [2022-03-19 04:52:40,368 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 04:52:40,368 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [668183026] [2022-03-19 04:52:40,368 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [668183026] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 04:52:40,368 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 04:52:40,368 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 40 [2022-03-19 04:52:40,369 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 04:52:40,369 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1809066322] [2022-03-19 04:52:40,369 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1809066322] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 04:52:40,369 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 04:52:40,369 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-03-19 04:52:40,369 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1607159019] [2022-03-19 04:52:40,369 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 04:52:40,369 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-19 04:52:40,369 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 04:52:40,370 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-19 04:52:40,370 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=708, Invalid=852, Unknown=0, NotChecked=0, Total=1560 [2022-03-19 04:52:40,370 INFO L87 Difference]: Start difference. First operand 173 states and 191 transitions. Second operand has 21 states, 21 states have (on average 6.238095238095238) internal successors, (131), 20 states have internal predecessors, (131), 20 states have call successors, (22), 20 states have call predecessors, (22), 18 states have return successors, (20), 18 states have call predecessors, (20), 19 states have call successors, (20) [2022-03-19 04:52:40,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 04:52:40,600 INFO L93 Difference]: Finished difference Result 187 states and 206 transitions. [2022-03-19 04:52:40,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-03-19 04:52:40,601 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 6.238095238095238) internal successors, (131), 20 states have internal predecessors, (131), 20 states have call successors, (22), 20 states have call predecessors, (22), 18 states have return successors, (20), 18 states have call predecessors, (20), 19 states have call successors, (20) Word has length 176 [2022-03-19 04:52:40,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 04:52:40,602 INFO L225 Difference]: With dead ends: 187 [2022-03-19 04:52:40,602 INFO L226 Difference]: Without dead ends: 182 [2022-03-19 04:52:40,603 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 368 GetRequests, 313 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 188 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=1371, Invalid=1821, Unknown=0, NotChecked=0, Total=3192 [2022-03-19 04:52:40,603 INFO L912 BasicCegarLoop]: 43 mSDtfsCounter, 76 mSDsluCounter, 175 mSDsCounter, 0 mSdLazyCounter, 99 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 218 SdHoareTripleChecker+Invalid, 134 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 99 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 04:52:40,603 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [76 Valid, 218 Invalid, 134 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 99 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 04:52:40,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2022-03-19 04:52:40,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 182. [2022-03-19 04:52:40,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 182 states, 138 states have (on average 1.1376811594202898) internal successors, (157), 138 states have internal predecessors, (157), 23 states have call successors, (23), 22 states have call predecessors, (23), 20 states have return successors, (21), 21 states have call predecessors, (21), 21 states have call successors, (21) [2022-03-19 04:52:40,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 201 transitions. [2022-03-19 04:52:40,619 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 201 transitions. Word has length 176 [2022-03-19 04:52:40,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 04:52:40,619 INFO L478 AbstractCegarLoop]: Abstraction has 182 states and 201 transitions. [2022-03-19 04:52:40,619 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 6.238095238095238) internal successors, (131), 20 states have internal predecessors, (131), 20 states have call successors, (22), 20 states have call predecessors, (22), 18 states have return successors, (20), 18 states have call predecessors, (20), 19 states have call successors, (20) [2022-03-19 04:52:40,619 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 201 transitions. [2022-03-19 04:52:40,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2022-03-19 04:52:40,620 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 04:52:40,620 INFO L500 BasicCegarLoop]: trace histogram [19, 19, 18, 18, 18, 18, 18, 18, 18, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 04:52:40,628 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2022-03-19 04:52:40,825 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 04:52:40,825 INFO L403 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 04:52:40,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 04:52:40,825 INFO L85 PathProgramCache]: Analyzing trace with hash 994740182, now seen corresponding path program 35 times [2022-03-19 04:52:40,825 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 04:52:40,826 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [996767392] [2022-03-19 04:52:40,826 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 04:52:40,826 INFO L85 PathProgramCache]: Analyzing trace with hash 994740182, now seen corresponding path program 36 times [2022-03-19 04:52:40,826 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 04:52:40,826 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [647906561] [2022-03-19 04:52:40,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 04:52:40,826 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 04:52:40,832 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 04:52:40,832 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1586746085] [2022-03-19 04:52:40,832 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-19 04:52:40,832 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 04:52:40,832 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 04:52:40,833 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 04:52:40,834 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-03-19 04:52:41,204 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2022-03-19 04:52:41,204 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 04:52:41,207 INFO L263 TraceCheckSpWp]: Trace formula consists of 453 conjuncts, 41 conjunts are in the unsatisfiable core [2022-03-19 04:52:41,210 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 04:52:41,598 INFO L134 CoverageAnalysis]: Checked inductivity of 1453 backedges. 36 proven. 1413 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-19 04:52:41,598 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 04:52:42,157 INFO L134 CoverageAnalysis]: Checked inductivity of 1453 backedges. 36 proven. 801 refuted. 0 times theorem prover too weak. 616 trivial. 0 not checked. [2022-03-19 04:52:42,157 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 04:52:42,157 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [647906561] [2022-03-19 04:52:42,157 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 04:52:42,157 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1586746085] [2022-03-19 04:52:42,158 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1586746085] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 04:52:42,158 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 04:52:42,158 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 42 [2022-03-19 04:52:42,158 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 04:52:42,158 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [996767392] [2022-03-19 04:52:42,158 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [996767392] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 04:52:42,158 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 04:52:42,158 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2022-03-19 04:52:42,158 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2099584670] [2022-03-19 04:52:42,158 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 04:52:42,159 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-19 04:52:42,159 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 04:52:42,159 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-19 04:52:42,160 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=785, Invalid=937, Unknown=0, NotChecked=0, Total=1722 [2022-03-19 04:52:42,160 INFO L87 Difference]: Start difference. First operand 182 states and 201 transitions. Second operand has 22 states, 22 states have (on average 6.2727272727272725) internal successors, (138), 21 states have internal predecessors, (138), 21 states have call successors, (23), 21 states have call predecessors, (23), 19 states have return successors, (21), 19 states have call predecessors, (21), 20 states have call successors, (21) [2022-03-19 04:52:42,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 04:52:42,405 INFO L93 Difference]: Finished difference Result 196 states and 216 transitions. [2022-03-19 04:52:42,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-03-19 04:52:42,405 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 6.2727272727272725) internal successors, (138), 21 states have internal predecessors, (138), 21 states have call successors, (23), 21 states have call predecessors, (23), 19 states have return successors, (21), 19 states have call predecessors, (21), 20 states have call successors, (21) Word has length 185 [2022-03-19 04:52:42,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 04:52:42,415 INFO L225 Difference]: With dead ends: 196 [2022-03-19 04:52:42,416 INFO L226 Difference]: Without dead ends: 191 [2022-03-19 04:52:42,417 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 387 GetRequests, 329 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 208 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1523, Invalid=2017, Unknown=0, NotChecked=0, Total=3540 [2022-03-19 04:52:42,417 INFO L912 BasicCegarLoop]: 44 mSDtfsCounter, 61 mSDsluCounter, 176 mSDsCounter, 0 mSdLazyCounter, 112 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 220 SdHoareTripleChecker+Invalid, 126 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 112 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 04:52:42,417 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [61 Valid, 220 Invalid, 126 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 112 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 04:52:42,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2022-03-19 04:52:42,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 191. [2022-03-19 04:52:42,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 191 states, 145 states have (on average 1.1379310344827587) internal successors, (165), 145 states have internal predecessors, (165), 24 states have call successors, (24), 23 states have call predecessors, (24), 21 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) [2022-03-19 04:52:42,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 211 transitions. [2022-03-19 04:52:42,443 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 211 transitions. Word has length 185 [2022-03-19 04:52:42,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 04:52:42,444 INFO L478 AbstractCegarLoop]: Abstraction has 191 states and 211 transitions. [2022-03-19 04:52:42,444 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 6.2727272727272725) internal successors, (138), 21 states have internal predecessors, (138), 21 states have call successors, (23), 21 states have call predecessors, (23), 19 states have return successors, (21), 19 states have call predecessors, (21), 20 states have call successors, (21) [2022-03-19 04:52:42,444 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 211 transitions. [2022-03-19 04:52:42,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2022-03-19 04:52:42,445 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 04:52:42,445 INFO L500 BasicCegarLoop]: trace histogram [20, 20, 19, 19, 19, 19, 19, 19, 19, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 04:52:42,451 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-03-19 04:52:42,645 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 04:52:42,646 INFO L403 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 04:52:42,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 04:52:42,646 INFO L85 PathProgramCache]: Analyzing trace with hash 1522264156, now seen corresponding path program 37 times [2022-03-19 04:52:42,646 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 04:52:42,646 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [285811789] [2022-03-19 04:52:42,646 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 04:52:42,646 INFO L85 PathProgramCache]: Analyzing trace with hash 1522264156, now seen corresponding path program 38 times [2022-03-19 04:52:42,647 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 04:52:42,647 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1410064839] [2022-03-19 04:52:42,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 04:52:42,647 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 04:52:42,653 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 04:52:42,653 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [818518346] [2022-03-19 04:52:42,653 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 04:52:42,653 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 04:52:42,653 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 04:52:42,656 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 04:52:42,679 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-03-19 04:52:42,740 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 04:52:42,740 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 04:52:42,742 INFO L263 TraceCheckSpWp]: Trace formula consists of 473 conjuncts, 43 conjunts are in the unsatisfiable core [2022-03-19 04:52:42,745 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 04:52:43,153 INFO L134 CoverageAnalysis]: Checked inductivity of 1619 backedges. 38 proven. 1577 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-19 04:52:43,153 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 04:52:43,760 INFO L134 CoverageAnalysis]: Checked inductivity of 1619 backedges. 38 proven. 893 refuted. 0 times theorem prover too weak. 688 trivial. 0 not checked. [2022-03-19 04:52:43,760 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 04:52:43,760 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1410064839] [2022-03-19 04:52:43,760 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 04:52:43,760 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [818518346] [2022-03-19 04:52:43,760 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [818518346] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 04:52:43,760 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 04:52:43,761 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 44 [2022-03-19 04:52:43,761 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 04:52:43,761 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [285811789] [2022-03-19 04:52:43,761 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [285811789] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 04:52:43,761 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 04:52:43,761 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2022-03-19 04:52:43,761 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1494115194] [2022-03-19 04:52:43,761 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 04:52:43,761 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-19 04:52:43,761 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 04:52:43,762 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-19 04:52:43,762 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=866, Invalid=1026, Unknown=0, NotChecked=0, Total=1892 [2022-03-19 04:52:43,763 INFO L87 Difference]: Start difference. First operand 191 states and 211 transitions. Second operand has 23 states, 23 states have (on average 6.304347826086956) internal successors, (145), 22 states have internal predecessors, (145), 22 states have call successors, (24), 22 states have call predecessors, (24), 20 states have return successors, (22), 20 states have call predecessors, (22), 21 states have call successors, (22) [2022-03-19 04:52:44,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 04:52:44,076 INFO L93 Difference]: Finished difference Result 205 states and 226 transitions. [2022-03-19 04:52:44,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-03-19 04:52:44,076 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 6.304347826086956) internal successors, (145), 22 states have internal predecessors, (145), 22 states have call successors, (24), 22 states have call predecessors, (24), 20 states have return successors, (22), 20 states have call predecessors, (22), 21 states have call successors, (22) Word has length 194 [2022-03-19 04:52:44,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 04:52:44,077 INFO L225 Difference]: With dead ends: 205 [2022-03-19 04:52:44,077 INFO L226 Difference]: Without dead ends: 200 [2022-03-19 04:52:44,078 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 406 GetRequests, 345 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 229 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1683, Invalid=2223, Unknown=0, NotChecked=0, Total=3906 [2022-03-19 04:52:44,078 INFO L912 BasicCegarLoop]: 45 mSDtfsCounter, 62 mSDsluCounter, 183 mSDsCounter, 0 mSdLazyCounter, 119 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 228 SdHoareTripleChecker+Invalid, 133 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 119 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 04:52:44,079 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [62 Valid, 228 Invalid, 133 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 119 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 04:52:44,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2022-03-19 04:52:44,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 200. [2022-03-19 04:52:44,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 200 states, 152 states have (on average 1.138157894736842) internal successors, (173), 152 states have internal predecessors, (173), 25 states have call successors, (25), 24 states have call predecessors, (25), 22 states have return successors, (23), 23 states have call predecessors, (23), 23 states have call successors, (23) [2022-03-19 04:52:44,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 221 transitions. [2022-03-19 04:52:44,095 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 221 transitions. Word has length 194 [2022-03-19 04:52:44,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 04:52:44,096 INFO L478 AbstractCegarLoop]: Abstraction has 200 states and 221 transitions. [2022-03-19 04:52:44,096 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 6.304347826086956) internal successors, (145), 22 states have internal predecessors, (145), 22 states have call successors, (24), 22 states have call predecessors, (24), 20 states have return successors, (22), 20 states have call predecessors, (22), 21 states have call successors, (22) [2022-03-19 04:52:44,096 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 221 transitions. [2022-03-19 04:52:44,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 204 [2022-03-19 04:52:44,097 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 04:52:44,097 INFO L500 BasicCegarLoop]: trace histogram [21, 21, 20, 20, 20, 20, 20, 20, 20, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 04:52:44,103 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-03-19 04:52:44,303 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 04:52:44,303 INFO L403 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 04:52:44,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 04:52:44,303 INFO L85 PathProgramCache]: Analyzing trace with hash 1934081686, now seen corresponding path program 39 times [2022-03-19 04:52:44,303 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 04:52:44,303 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [135635696] [2022-03-19 04:52:44,304 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 04:52:44,304 INFO L85 PathProgramCache]: Analyzing trace with hash 1934081686, now seen corresponding path program 40 times [2022-03-19 04:52:44,304 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 04:52:44,304 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1006430928] [2022-03-19 04:52:44,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 04:52:44,304 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 04:52:44,310 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 04:52:44,310 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [814838984] [2022-03-19 04:52:44,310 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 04:52:44,310 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 04:52:44,310 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 04:52:44,311 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 04:52:44,312 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-03-19 04:52:44,460 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 04:52:44,460 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 04:52:44,462 INFO L263 TraceCheckSpWp]: Trace formula consists of 493 conjuncts, 45 conjunts are in the unsatisfiable core [2022-03-19 04:52:44,465 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 04:52:44,867 INFO L134 CoverageAnalysis]: Checked inductivity of 1794 backedges. 40 proven. 1750 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-19 04:52:44,867 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 04:52:45,519 INFO L134 CoverageAnalysis]: Checked inductivity of 1794 backedges. 40 proven. 990 refuted. 0 times theorem prover too weak. 764 trivial. 0 not checked. [2022-03-19 04:52:45,519 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 04:52:45,519 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1006430928] [2022-03-19 04:52:45,519 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 04:52:45,519 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [814838984] [2022-03-19 04:52:45,519 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [814838984] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 04:52:45,519 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 04:52:45,519 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 46 [2022-03-19 04:52:45,520 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 04:52:45,520 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [135635696] [2022-03-19 04:52:45,520 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [135635696] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 04:52:45,520 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 04:52:45,520 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2022-03-19 04:52:45,520 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [6510799] [2022-03-19 04:52:45,520 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 04:52:45,520 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-19 04:52:45,520 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 04:52:45,521 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-19 04:52:45,521 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=951, Invalid=1119, Unknown=0, NotChecked=0, Total=2070 [2022-03-19 04:52:45,521 INFO L87 Difference]: Start difference. First operand 200 states and 221 transitions. Second operand has 24 states, 24 states have (on average 6.333333333333333) internal successors, (152), 23 states have internal predecessors, (152), 23 states have call successors, (25), 23 states have call predecessors, (25), 21 states have return successors, (23), 21 states have call predecessors, (23), 22 states have call successors, (23) [2022-03-19 04:52:45,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 04:52:45,818 INFO L93 Difference]: Finished difference Result 214 states and 236 transitions. [2022-03-19 04:52:45,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-03-19 04:52:45,819 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 6.333333333333333) internal successors, (152), 23 states have internal predecessors, (152), 23 states have call successors, (25), 23 states have call predecessors, (25), 21 states have return successors, (23), 21 states have call predecessors, (23), 22 states have call successors, (23) Word has length 203 [2022-03-19 04:52:45,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 04:52:45,820 INFO L225 Difference]: With dead ends: 214 [2022-03-19 04:52:45,820 INFO L226 Difference]: Without dead ends: 209 [2022-03-19 04:52:45,821 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 425 GetRequests, 361 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 251 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1851, Invalid=2439, Unknown=0, NotChecked=0, Total=4290 [2022-03-19 04:52:45,821 INFO L912 BasicCegarLoop]: 46 mSDtfsCounter, 69 mSDsluCounter, 196 mSDsCounter, 0 mSdLazyCounter, 131 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 242 SdHoareTripleChecker+Invalid, 145 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 131 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 04:52:45,822 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [69 Valid, 242 Invalid, 145 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 131 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 04:52:45,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2022-03-19 04:52:45,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 209. [2022-03-19 04:52:45,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 209 states, 159 states have (on average 1.1383647798742138) internal successors, (181), 159 states have internal predecessors, (181), 26 states have call successors, (26), 25 states have call predecessors, (26), 23 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) [2022-03-19 04:52:45,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 231 transitions. [2022-03-19 04:52:45,839 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 231 transitions. Word has length 203 [2022-03-19 04:52:45,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 04:52:45,839 INFO L478 AbstractCegarLoop]: Abstraction has 209 states and 231 transitions. [2022-03-19 04:52:45,840 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 6.333333333333333) internal successors, (152), 23 states have internal predecessors, (152), 23 states have call successors, (25), 23 states have call predecessors, (25), 21 states have return successors, (23), 21 states have call predecessors, (23), 22 states have call successors, (23) [2022-03-19 04:52:45,840 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 231 transitions. [2022-03-19 04:52:45,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 213 [2022-03-19 04:52:45,841 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 04:52:45,841 INFO L500 BasicCegarLoop]: trace histogram [22, 22, 21, 21, 21, 21, 21, 21, 21, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 04:52:45,852 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-03-19 04:52:46,045 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 04:52:46,046 INFO L403 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 04:52:46,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 04:52:46,046 INFO L85 PathProgramCache]: Analyzing trace with hash -2075113060, now seen corresponding path program 41 times [2022-03-19 04:52:46,046 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 04:52:46,046 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [785055841] [2022-03-19 04:52:46,046 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 04:52:46,046 INFO L85 PathProgramCache]: Analyzing trace with hash -2075113060, now seen corresponding path program 42 times [2022-03-19 04:52:46,047 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 04:52:46,047 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1478386459] [2022-03-19 04:52:46,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 04:52:46,047 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 04:52:46,054 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 04:52:46,054 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1009058147] [2022-03-19 04:52:46,054 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-19 04:52:46,054 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 04:52:46,054 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 04:52:46,055 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 04:52:46,055 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-03-19 04:52:49,421 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 22 check-sat command(s) [2022-03-19 04:52:49,422 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 04:52:49,429 INFO L263 TraceCheckSpWp]: Trace formula consists of 513 conjuncts, 47 conjunts are in the unsatisfiable core [2022-03-19 04:52:49,432 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 04:52:49,874 INFO L134 CoverageAnalysis]: Checked inductivity of 1978 backedges. 42 proven. 1932 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-19 04:52:49,875 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 04:52:50,592 INFO L134 CoverageAnalysis]: Checked inductivity of 1978 backedges. 42 proven. 1092 refuted. 0 times theorem prover too weak. 844 trivial. 0 not checked. [2022-03-19 04:52:50,593 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 04:52:50,593 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1478386459] [2022-03-19 04:52:50,593 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 04:52:50,593 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1009058147] [2022-03-19 04:52:50,593 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1009058147] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 04:52:50,593 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 04:52:50,593 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 48 [2022-03-19 04:52:50,593 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 04:52:50,593 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [785055841] [2022-03-19 04:52:50,593 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [785055841] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 04:52:50,593 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 04:52:50,594 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2022-03-19 04:52:50,594 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1620861205] [2022-03-19 04:52:50,594 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 04:52:50,594 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-19 04:52:50,594 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 04:52:50,594 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-19 04:52:50,595 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1040, Invalid=1216, Unknown=0, NotChecked=0, Total=2256 [2022-03-19 04:52:50,595 INFO L87 Difference]: Start difference. First operand 209 states and 231 transitions. Second operand has 25 states, 25 states have (on average 6.36) internal successors, (159), 24 states have internal predecessors, (159), 24 states have call successors, (26), 24 states have call predecessors, (26), 22 states have return successors, (24), 22 states have call predecessors, (24), 23 states have call successors, (24) [2022-03-19 04:52:50,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 04:52:50,958 INFO L93 Difference]: Finished difference Result 223 states and 246 transitions. [2022-03-19 04:52:50,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-03-19 04:52:50,959 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 6.36) internal successors, (159), 24 states have internal predecessors, (159), 24 states have call successors, (26), 24 states have call predecessors, (26), 22 states have return successors, (24), 22 states have call predecessors, (24), 23 states have call successors, (24) Word has length 212 [2022-03-19 04:52:50,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 04:52:50,960 INFO L225 Difference]: With dead ends: 223 [2022-03-19 04:52:50,960 INFO L226 Difference]: Without dead ends: 218 [2022-03-19 04:52:50,961 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 444 GetRequests, 377 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 274 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=2027, Invalid=2665, Unknown=0, NotChecked=0, Total=4692 [2022-03-19 04:52:50,961 INFO L912 BasicCegarLoop]: 47 mSDtfsCounter, 68 mSDsluCounter, 197 mSDsCounter, 0 mSdLazyCounter, 132 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 244 SdHoareTripleChecker+Invalid, 153 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 132 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 04:52:50,962 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [68 Valid, 244 Invalid, 153 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 132 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 04:52:50,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2022-03-19 04:52:50,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 218. [2022-03-19 04:52:50,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 218 states, 166 states have (on average 1.1385542168674698) internal successors, (189), 166 states have internal predecessors, (189), 27 states have call successors, (27), 26 states have call predecessors, (27), 24 states have return successors, (25), 25 states have call predecessors, (25), 25 states have call successors, (25) [2022-03-19 04:52:50,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 218 states to 218 states and 241 transitions. [2022-03-19 04:52:50,990 INFO L78 Accepts]: Start accepts. Automaton has 218 states and 241 transitions. Word has length 212 [2022-03-19 04:52:50,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 04:52:50,990 INFO L478 AbstractCegarLoop]: Abstraction has 218 states and 241 transitions. [2022-03-19 04:52:50,991 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 6.36) internal successors, (159), 24 states have internal predecessors, (159), 24 states have call successors, (26), 24 states have call predecessors, (26), 22 states have return successors, (24), 22 states have call predecessors, (24), 23 states have call successors, (24) [2022-03-19 04:52:50,991 INFO L276 IsEmpty]: Start isEmpty. Operand 218 states and 241 transitions. [2022-03-19 04:52:50,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 222 [2022-03-19 04:52:50,993 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 04:52:50,993 INFO L500 BasicCegarLoop]: trace histogram [23, 23, 22, 22, 22, 22, 22, 22, 22, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 04:52:51,001 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2022-03-19 04:52:51,199 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2022-03-19 04:52:51,200 INFO L403 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 04:52:51,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 04:52:51,200 INFO L85 PathProgramCache]: Analyzing trace with hash -1234385578, now seen corresponding path program 43 times [2022-03-19 04:52:51,200 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 04:52:51,200 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1399377975] [2022-03-19 04:52:51,201 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 04:52:51,201 INFO L85 PathProgramCache]: Analyzing trace with hash -1234385578, now seen corresponding path program 44 times [2022-03-19 04:52:51,201 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 04:52:51,201 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1958493709] [2022-03-19 04:52:51,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 04:52:51,201 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 04:52:51,207 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 04:52:51,207 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1737099812] [2022-03-19 04:52:51,207 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 04:52:51,207 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 04:52:51,207 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 04:52:51,208 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 04:52:51,209 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-03-19 04:52:51,280 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 04:52:51,280 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 04:52:51,282 INFO L263 TraceCheckSpWp]: Trace formula consists of 533 conjuncts, 49 conjunts are in the unsatisfiable core [2022-03-19 04:52:51,285 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 04:52:51,762 INFO L134 CoverageAnalysis]: Checked inductivity of 2171 backedges. 44 proven. 2123 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-19 04:52:51,762 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 04:52:52,480 INFO L134 CoverageAnalysis]: Checked inductivity of 2171 backedges. 44 proven. 1199 refuted. 0 times theorem prover too weak. 928 trivial. 0 not checked. [2022-03-19 04:52:52,480 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 04:52:52,481 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1958493709] [2022-03-19 04:52:52,481 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 04:52:52,481 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1737099812] [2022-03-19 04:52:52,481 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1737099812] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 04:52:52,481 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 04:52:52,481 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 50 [2022-03-19 04:52:52,481 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 04:52:52,481 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1399377975] [2022-03-19 04:52:52,481 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1399377975] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 04:52:52,481 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 04:52:52,481 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [] total 26 [2022-03-19 04:52:52,481 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [921948411] [2022-03-19 04:52:52,482 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 04:52:52,482 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-19 04:52:52,482 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 04:52:52,482 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-19 04:52:52,483 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1133, Invalid=1317, Unknown=0, NotChecked=0, Total=2450 [2022-03-19 04:52:52,484 INFO L87 Difference]: Start difference. First operand 218 states and 241 transitions. Second operand has 26 states, 26 states have (on average 6.384615384615385) internal successors, (166), 25 states have internal predecessors, (166), 25 states have call successors, (27), 25 states have call predecessors, (27), 23 states have return successors, (25), 23 states have call predecessors, (25), 24 states have call successors, (25) [2022-03-19 04:52:52,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 04:52:52,815 INFO L93 Difference]: Finished difference Result 232 states and 256 transitions. [2022-03-19 04:52:52,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-03-19 04:52:52,816 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 6.384615384615385) internal successors, (166), 25 states have internal predecessors, (166), 25 states have call successors, (27), 25 states have call predecessors, (27), 23 states have return successors, (25), 23 states have call predecessors, (25), 24 states have call successors, (25) Word has length 221 [2022-03-19 04:52:52,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 04:52:52,828 INFO L225 Difference]: With dead ends: 232 [2022-03-19 04:52:52,828 INFO L226 Difference]: Without dead ends: 227 [2022-03-19 04:52:52,830 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 463 GetRequests, 393 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 298 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=2211, Invalid=2901, Unknown=0, NotChecked=0, Total=5112 [2022-03-19 04:52:52,830 INFO L912 BasicCegarLoop]: 48 mSDtfsCounter, 78 mSDsluCounter, 222 mSDsCounter, 0 mSdLazyCounter, 140 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 270 SdHoareTripleChecker+Invalid, 168 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 140 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 04:52:52,831 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [78 Valid, 270 Invalid, 168 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 140 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 04:52:52,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2022-03-19 04:52:52,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 227. [2022-03-19 04:52:52,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 227 states, 173 states have (on average 1.138728323699422) internal successors, (197), 173 states have internal predecessors, (197), 28 states have call successors, (28), 27 states have call predecessors, (28), 25 states have return successors, (26), 26 states have call predecessors, (26), 26 states have call successors, (26) [2022-03-19 04:52:52,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 251 transitions. [2022-03-19 04:52:52,856 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 251 transitions. Word has length 221 [2022-03-19 04:52:52,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 04:52:52,856 INFO L478 AbstractCegarLoop]: Abstraction has 227 states and 251 transitions. [2022-03-19 04:52:52,856 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 6.384615384615385) internal successors, (166), 25 states have internal predecessors, (166), 25 states have call successors, (27), 25 states have call predecessors, (27), 23 states have return successors, (25), 23 states have call predecessors, (25), 24 states have call successors, (25) [2022-03-19 04:52:52,857 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 251 transitions. [2022-03-19 04:52:52,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 231 [2022-03-19 04:52:52,857 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 04:52:52,857 INFO L500 BasicCegarLoop]: trace histogram [24, 24, 23, 23, 23, 23, 23, 23, 23, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 04:52:52,876 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2022-03-19 04:52:53,074 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2022-03-19 04:52:53,075 INFO L403 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 04:52:53,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 04:52:53,075 INFO L85 PathProgramCache]: Analyzing trace with hash -360260900, now seen corresponding path program 45 times [2022-03-19 04:52:53,075 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 04:52:53,075 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [871219013] [2022-03-19 04:52:53,076 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 04:52:53,076 INFO L85 PathProgramCache]: Analyzing trace with hash -360260900, now seen corresponding path program 46 times [2022-03-19 04:52:53,076 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 04:52:53,076 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1903751168] [2022-03-19 04:52:53,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 04:52:53,076 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 04:52:53,082 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 04:52:53,082 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1558610774] [2022-03-19 04:52:53,082 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 04:52:53,082 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 04:52:53,082 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 04:52:53,084 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 04:52:53,086 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-03-19 04:52:53,203 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 04:52:53,204 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 04:52:53,206 INFO L263 TraceCheckSpWp]: Trace formula consists of 553 conjuncts, 51 conjunts are in the unsatisfiable core [2022-03-19 04:52:53,209 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 04:52:53,699 INFO L134 CoverageAnalysis]: Checked inductivity of 2373 backedges. 46 proven. 2323 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-19 04:52:53,699 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 04:52:54,483 INFO L134 CoverageAnalysis]: Checked inductivity of 2373 backedges. 46 proven. 1311 refuted. 0 times theorem prover too weak. 1016 trivial. 0 not checked. [2022-03-19 04:52:54,484 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 04:52:54,484 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1903751168] [2022-03-19 04:52:54,484 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 04:52:54,484 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1558610774] [2022-03-19 04:52:54,484 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1558610774] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 04:52:54,484 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 04:52:54,484 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 52 [2022-03-19 04:52:54,484 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 04:52:54,484 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [871219013] [2022-03-19 04:52:54,484 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [871219013] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 04:52:54,485 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 04:52:54,485 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [27] imperfect sequences [] total 27 [2022-03-19 04:52:54,485 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1081102217] [2022-03-19 04:52:54,485 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 04:52:54,485 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-19 04:52:54,485 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 04:52:54,485 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-19 04:52:54,486 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1230, Invalid=1422, Unknown=0, NotChecked=0, Total=2652 [2022-03-19 04:52:54,486 INFO L87 Difference]: Start difference. First operand 227 states and 251 transitions. Second operand has 27 states, 27 states have (on average 6.407407407407407) internal successors, (173), 26 states have internal predecessors, (173), 26 states have call successors, (28), 26 states have call predecessors, (28), 24 states have return successors, (26), 24 states have call predecessors, (26), 25 states have call successors, (26) [2022-03-19 04:52:54,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 04:52:54,855 INFO L93 Difference]: Finished difference Result 241 states and 266 transitions. [2022-03-19 04:52:54,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-03-19 04:52:54,855 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 6.407407407407407) internal successors, (173), 26 states have internal predecessors, (173), 26 states have call successors, (28), 26 states have call predecessors, (28), 24 states have return successors, (26), 24 states have call predecessors, (26), 25 states have call successors, (26) Word has length 230 [2022-03-19 04:52:54,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 04:52:54,857 INFO L225 Difference]: With dead ends: 241 [2022-03-19 04:52:54,857 INFO L226 Difference]: Without dead ends: 236 [2022-03-19 04:52:54,857 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 482 GetRequests, 409 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 323 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=2403, Invalid=3147, Unknown=0, NotChecked=0, Total=5550 [2022-03-19 04:52:54,858 INFO L912 BasicCegarLoop]: 49 mSDtfsCounter, 90 mSDsluCounter, 211 mSDsCounter, 0 mSdLazyCounter, 143 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 260 SdHoareTripleChecker+Invalid, 178 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 143 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 04:52:54,858 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [90 Valid, 260 Invalid, 178 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 143 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 04:52:54,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2022-03-19 04:52:54,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 236. [2022-03-19 04:52:54,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 236 states, 180 states have (on average 1.1388888888888888) internal successors, (205), 180 states have internal predecessors, (205), 29 states have call successors, (29), 28 states have call predecessors, (29), 26 states have return successors, (27), 27 states have call predecessors, (27), 27 states have call successors, (27) [2022-03-19 04:52:54,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 236 states to 236 states and 261 transitions. [2022-03-19 04:52:54,880 INFO L78 Accepts]: Start accepts. Automaton has 236 states and 261 transitions. Word has length 230 [2022-03-19 04:52:54,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 04:52:54,880 INFO L478 AbstractCegarLoop]: Abstraction has 236 states and 261 transitions. [2022-03-19 04:52:54,881 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 6.407407407407407) internal successors, (173), 26 states have internal predecessors, (173), 26 states have call successors, (28), 26 states have call predecessors, (28), 24 states have return successors, (26), 24 states have call predecessors, (26), 25 states have call successors, (26) [2022-03-19 04:52:54,881 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states and 261 transitions. [2022-03-19 04:52:54,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 240 [2022-03-19 04:52:54,882 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 04:52:54,882 INFO L500 BasicCegarLoop]: trace histogram [25, 25, 24, 24, 24, 24, 24, 24, 24, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 04:52:54,889 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2022-03-19 04:52:55,087 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-03-19 04:52:55,088 INFO L403 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 04:52:55,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 04:52:55,088 INFO L85 PathProgramCache]: Analyzing trace with hash -1738171370, now seen corresponding path program 47 times [2022-03-19 04:52:55,088 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 04:52:55,088 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [240692565] [2022-03-19 04:52:55,088 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 04:52:55,088 INFO L85 PathProgramCache]: Analyzing trace with hash -1738171370, now seen corresponding path program 48 times [2022-03-19 04:52:55,089 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 04:52:55,089 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1274278326] [2022-03-19 04:52:55,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 04:52:55,089 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 04:52:55,099 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 04:52:55,099 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [461812764] [2022-03-19 04:52:55,099 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-19 04:52:55,100 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 04:52:55,100 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 04:52:55,101 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 04:52:55,102 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-03-19 04:53:07,618 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 25 check-sat command(s) [2022-03-19 04:53:07,618 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 04:53:07,631 INFO L263 TraceCheckSpWp]: Trace formula consists of 573 conjuncts, 53 conjunts are in the unsatisfiable core [2022-03-19 04:53:07,635 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 04:53:08,142 INFO L134 CoverageAnalysis]: Checked inductivity of 2584 backedges. 48 proven. 2532 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-19 04:53:08,143 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 04:53:09,000 INFO L134 CoverageAnalysis]: Checked inductivity of 2584 backedges. 48 proven. 1428 refuted. 0 times theorem prover too weak. 1108 trivial. 0 not checked. [2022-03-19 04:53:09,001 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 04:53:09,001 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1274278326] [2022-03-19 04:53:09,001 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 04:53:09,001 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [461812764] [2022-03-19 04:53:09,001 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [461812764] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 04:53:09,001 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 04:53:09,001 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 54 [2022-03-19 04:53:09,001 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 04:53:09,001 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [240692565] [2022-03-19 04:53:09,001 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [240692565] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 04:53:09,001 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 04:53:09,001 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [28] imperfect sequences [] total 28 [2022-03-19 04:53:09,002 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [835124560] [2022-03-19 04:53:09,008 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 04:53:09,009 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-03-19 04:53:09,009 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 04:53:09,009 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-03-19 04:53:09,009 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1331, Invalid=1531, Unknown=0, NotChecked=0, Total=2862 [2022-03-19 04:53:09,010 INFO L87 Difference]: Start difference. First operand 236 states and 261 transitions. Second operand has 28 states, 28 states have (on average 6.428571428571429) internal successors, (180), 27 states have internal predecessors, (180), 27 states have call successors, (29), 27 states have call predecessors, (29), 25 states have return successors, (27), 25 states have call predecessors, (27), 26 states have call successors, (27) [2022-03-19 04:53:09,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 04:53:09,462 INFO L93 Difference]: Finished difference Result 250 states and 276 transitions. [2022-03-19 04:53:09,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-03-19 04:53:09,462 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 6.428571428571429) internal successors, (180), 27 states have internal predecessors, (180), 27 states have call successors, (29), 27 states have call predecessors, (29), 25 states have return successors, (27), 25 states have call predecessors, (27), 26 states have call successors, (27) Word has length 239 [2022-03-19 04:53:09,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 04:53:09,464 INFO L225 Difference]: With dead ends: 250 [2022-03-19 04:53:09,464 INFO L226 Difference]: Without dead ends: 245 [2022-03-19 04:53:09,465 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 501 GetRequests, 425 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 349 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=2603, Invalid=3403, Unknown=0, NotChecked=0, Total=6006 [2022-03-19 04:53:09,465 INFO L912 BasicCegarLoop]: 50 mSDtfsCounter, 107 mSDsluCounter, 224 mSDsCounter, 0 mSdLazyCounter, 151 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 274 SdHoareTripleChecker+Invalid, 186 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 151 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 04:53:09,466 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [107 Valid, 274 Invalid, 186 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 151 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 04:53:09,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 245 states. [2022-03-19 04:53:09,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 245 to 245. [2022-03-19 04:53:09,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 245 states, 187 states have (on average 1.13903743315508) internal successors, (213), 187 states have internal predecessors, (213), 30 states have call successors, (30), 29 states have call predecessors, (30), 27 states have return successors, (28), 28 states have call predecessors, (28), 28 states have call successors, (28) [2022-03-19 04:53:09,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 245 states to 245 states and 271 transitions. [2022-03-19 04:53:09,486 INFO L78 Accepts]: Start accepts. Automaton has 245 states and 271 transitions. Word has length 239 [2022-03-19 04:53:09,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 04:53:09,486 INFO L478 AbstractCegarLoop]: Abstraction has 245 states and 271 transitions. [2022-03-19 04:53:09,486 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 6.428571428571429) internal successors, (180), 27 states have internal predecessors, (180), 27 states have call successors, (29), 27 states have call predecessors, (29), 25 states have return successors, (27), 25 states have call predecessors, (27), 26 states have call successors, (27) [2022-03-19 04:53:09,486 INFO L276 IsEmpty]: Start isEmpty. Operand 245 states and 271 transitions. [2022-03-19 04:53:09,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 249 [2022-03-19 04:53:09,487 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 04:53:09,487 INFO L500 BasicCegarLoop]: trace histogram [26, 26, 25, 25, 25, 25, 25, 25, 25, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 04:53:09,499 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2022-03-19 04:53:09,699 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2022-03-19 04:53:09,699 INFO L403 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 04:53:09,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 04:53:09,700 INFO L85 PathProgramCache]: Analyzing trace with hash 1530108956, now seen corresponding path program 49 times [2022-03-19 04:53:09,700 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 04:53:09,700 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2011749601] [2022-03-19 04:53:09,700 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 04:53:09,700 INFO L85 PathProgramCache]: Analyzing trace with hash 1530108956, now seen corresponding path program 50 times [2022-03-19 04:53:09,701 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 04:53:09,701 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2017132478] [2022-03-19 04:53:09,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 04:53:09,701 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 04:53:09,711 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 04:53:09,712 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1273346786] [2022-03-19 04:53:09,712 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 04:53:09,712 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 04:53:09,712 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 04:53:09,713 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 04:53:09,714 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-03-19 04:53:09,791 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 04:53:09,791 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 04:53:09,794 INFO L263 TraceCheckSpWp]: Trace formula consists of 593 conjuncts, 55 conjunts are in the unsatisfiable core [2022-03-19 04:53:09,796 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 04:53:10,350 INFO L134 CoverageAnalysis]: Checked inductivity of 2804 backedges. 50 proven. 2750 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-19 04:53:10,351 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 04:53:11,284 INFO L134 CoverageAnalysis]: Checked inductivity of 2804 backedges. 50 proven. 1550 refuted. 0 times theorem prover too weak. 1204 trivial. 0 not checked. [2022-03-19 04:53:11,284 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 04:53:11,284 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2017132478] [2022-03-19 04:53:11,284 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 04:53:11,285 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1273346786] [2022-03-19 04:53:11,285 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1273346786] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 04:53:11,285 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 04:53:11,285 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 56 [2022-03-19 04:53:11,285 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 04:53:11,285 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2011749601] [2022-03-19 04:53:11,285 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2011749601] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 04:53:11,285 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 04:53:11,285 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [29] imperfect sequences [] total 29 [2022-03-19 04:53:11,285 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [959279260] [2022-03-19 04:53:11,285 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 04:53:11,286 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-03-19 04:53:11,286 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 04:53:11,286 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-03-19 04:53:11,287 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1436, Invalid=1644, Unknown=0, NotChecked=0, Total=3080 [2022-03-19 04:53:11,287 INFO L87 Difference]: Start difference. First operand 245 states and 271 transitions. Second operand has 29 states, 29 states have (on average 6.448275862068965) internal successors, (187), 28 states have internal predecessors, (187), 28 states have call successors, (30), 28 states have call predecessors, (30), 26 states have return successors, (28), 26 states have call predecessors, (28), 27 states have call successors, (28) [2022-03-19 04:53:11,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 04:53:11,704 INFO L93 Difference]: Finished difference Result 259 states and 286 transitions. [2022-03-19 04:53:11,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-03-19 04:53:11,705 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 6.448275862068965) internal successors, (187), 28 states have internal predecessors, (187), 28 states have call successors, (30), 28 states have call predecessors, (30), 26 states have return successors, (28), 26 states have call predecessors, (28), 27 states have call successors, (28) Word has length 248 [2022-03-19 04:53:11,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 04:53:11,706 INFO L225 Difference]: With dead ends: 259 [2022-03-19 04:53:11,706 INFO L226 Difference]: Without dead ends: 254 [2022-03-19 04:53:11,707 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 520 GetRequests, 441 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 376 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=2811, Invalid=3669, Unknown=0, NotChecked=0, Total=6480 [2022-03-19 04:53:11,707 INFO L912 BasicCegarLoop]: 51 mSDtfsCounter, 105 mSDsluCounter, 231 mSDsCounter, 0 mSdLazyCounter, 166 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 282 SdHoareTripleChecker+Invalid, 180 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 166 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 04:53:11,707 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [105 Valid, 282 Invalid, 180 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 166 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 04:53:11,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2022-03-19 04:53:11,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 254. [2022-03-19 04:53:11,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 254 states, 194 states have (on average 1.1391752577319587) internal successors, (221), 194 states have internal predecessors, (221), 31 states have call successors, (31), 30 states have call predecessors, (31), 28 states have return successors, (29), 29 states have call predecessors, (29), 29 states have call successors, (29) [2022-03-19 04:53:11,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 254 states to 254 states and 281 transitions. [2022-03-19 04:53:11,728 INFO L78 Accepts]: Start accepts. Automaton has 254 states and 281 transitions. Word has length 248 [2022-03-19 04:53:11,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 04:53:11,729 INFO L478 AbstractCegarLoop]: Abstraction has 254 states and 281 transitions. [2022-03-19 04:53:11,729 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 6.448275862068965) internal successors, (187), 28 states have internal predecessors, (187), 28 states have call successors, (30), 28 states have call predecessors, (30), 26 states have return successors, (28), 26 states have call predecessors, (28), 27 states have call successors, (28) [2022-03-19 04:53:11,729 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states and 281 transitions. [2022-03-19 04:53:11,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 258 [2022-03-19 04:53:11,730 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 04:53:11,730 INFO L500 BasicCegarLoop]: trace histogram [27, 27, 26, 26, 26, 26, 26, 26, 26, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 04:53:11,747 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2022-03-19 04:53:11,937 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-03-19 04:53:11,937 INFO L403 AbstractCegarLoop]: === Iteration 30 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 04:53:11,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 04:53:11,938 INFO L85 PathProgramCache]: Analyzing trace with hash -1713487146, now seen corresponding path program 51 times [2022-03-19 04:53:11,938 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 04:53:11,938 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1148746460] [2022-03-19 04:53:11,938 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 04:53:11,938 INFO L85 PathProgramCache]: Analyzing trace with hash -1713487146, now seen corresponding path program 52 times [2022-03-19 04:53:11,938 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 04:53:11,938 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1759651943] [2022-03-19 04:53:11,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 04:53:11,938 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 04:53:11,949 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 04:53:11,949 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1052869453] [2022-03-19 04:53:11,950 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 04:53:11,950 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 04:53:11,950 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 04:53:11,951 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 04:53:11,952 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-03-19 04:53:12,224 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 04:53:12,225 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 04:53:12,227 INFO L263 TraceCheckSpWp]: Trace formula consists of 613 conjuncts, 57 conjunts are in the unsatisfiable core [2022-03-19 04:53:12,230 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 04:53:12,779 INFO L134 CoverageAnalysis]: Checked inductivity of 3033 backedges. 52 proven. 2977 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-19 04:53:12,779 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 04:53:13,715 INFO L134 CoverageAnalysis]: Checked inductivity of 3033 backedges. 52 proven. 1677 refuted. 0 times theorem prover too weak. 1304 trivial. 0 not checked. [2022-03-19 04:53:13,715 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 04:53:13,716 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1759651943] [2022-03-19 04:53:13,716 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 04:53:13,716 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1052869453] [2022-03-19 04:53:13,716 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1052869453] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 04:53:13,716 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 04:53:13,716 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 58 [2022-03-19 04:53:13,716 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 04:53:13,716 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1148746460] [2022-03-19 04:53:13,716 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1148746460] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 04:53:13,716 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 04:53:13,716 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [30] imperfect sequences [] total 30 [2022-03-19 04:53:13,716 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1435858462] [2022-03-19 04:53:13,716 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 04:53:13,717 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-03-19 04:53:13,717 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 04:53:13,717 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-03-19 04:53:13,718 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1545, Invalid=1761, Unknown=0, NotChecked=0, Total=3306 [2022-03-19 04:53:13,718 INFO L87 Difference]: Start difference. First operand 254 states and 281 transitions. Second operand has 30 states, 30 states have (on average 6.466666666666667) internal successors, (194), 29 states have internal predecessors, (194), 29 states have call successors, (31), 29 states have call predecessors, (31), 27 states have return successors, (29), 27 states have call predecessors, (29), 28 states have call successors, (29) [2022-03-19 04:53:14,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 04:53:14,167 INFO L93 Difference]: Finished difference Result 268 states and 296 transitions. [2022-03-19 04:53:14,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2022-03-19 04:53:14,168 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 6.466666666666667) internal successors, (194), 29 states have internal predecessors, (194), 29 states have call successors, (31), 29 states have call predecessors, (31), 27 states have return successors, (29), 27 states have call predecessors, (29), 28 states have call successors, (29) Word has length 257 [2022-03-19 04:53:14,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 04:53:14,169 INFO L225 Difference]: With dead ends: 268 [2022-03-19 04:53:14,169 INFO L226 Difference]: Without dead ends: 263 [2022-03-19 04:53:14,169 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 539 GetRequests, 457 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 404 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=3027, Invalid=3945, Unknown=0, NotChecked=0, Total=6972 [2022-03-19 04:53:14,170 INFO L912 BasicCegarLoop]: 52 mSDtfsCounter, 96 mSDsluCounter, 244 mSDsCounter, 0 mSdLazyCounter, 162 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 296 SdHoareTripleChecker+Invalid, 176 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 162 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 04:53:14,170 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [96 Valid, 296 Invalid, 176 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 162 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 04:53:14,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 263 states. [2022-03-19 04:53:14,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 263 to 263. [2022-03-19 04:53:14,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 263 states, 201 states have (on average 1.1393034825870647) internal successors, (229), 201 states have internal predecessors, (229), 32 states have call successors, (32), 31 states have call predecessors, (32), 29 states have return successors, (30), 30 states have call predecessors, (30), 30 states have call successors, (30) [2022-03-19 04:53:14,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 263 states to 263 states and 291 transitions. [2022-03-19 04:53:14,192 INFO L78 Accepts]: Start accepts. Automaton has 263 states and 291 transitions. Word has length 257 [2022-03-19 04:53:14,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 04:53:14,193 INFO L478 AbstractCegarLoop]: Abstraction has 263 states and 291 transitions. [2022-03-19 04:53:14,193 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 6.466666666666667) internal successors, (194), 29 states have internal predecessors, (194), 29 states have call successors, (31), 29 states have call predecessors, (31), 27 states have return successors, (29), 27 states have call predecessors, (29), 28 states have call successors, (29) [2022-03-19 04:53:14,193 INFO L276 IsEmpty]: Start isEmpty. Operand 263 states and 291 transitions. [2022-03-19 04:53:14,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2022-03-19 04:53:14,194 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 04:53:14,194 INFO L500 BasicCegarLoop]: trace histogram [28, 28, 27, 27, 27, 27, 27, 27, 27, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 04:53:14,199 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2022-03-19 04:53:14,395 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 04:53:14,395 INFO L403 AbstractCegarLoop]: === Iteration 31 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 04:53:14,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 04:53:14,396 INFO L85 PathProgramCache]: Analyzing trace with hash 1462406492, now seen corresponding path program 53 times [2022-03-19 04:53:14,396 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 04:53:14,396 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1527775197] [2022-03-19 04:53:14,396 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 04:53:14,396 INFO L85 PathProgramCache]: Analyzing trace with hash 1462406492, now seen corresponding path program 54 times [2022-03-19 04:53:14,396 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 04:53:14,396 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1519996750] [2022-03-19 04:53:14,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 04:53:14,397 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 04:53:14,403 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 04:53:14,403 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1061157600] [2022-03-19 04:53:14,403 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-19 04:53:14,403 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 04:53:14,403 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 04:53:14,404 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 04:53:14,405 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-03-19 04:53:21,256 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 28 check-sat command(s) [2022-03-19 04:53:21,257 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 04:53:21,271 INFO L263 TraceCheckSpWp]: Trace formula consists of 633 conjuncts, 59 conjunts are in the unsatisfiable core [2022-03-19 04:53:21,275 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 04:53:21,849 INFO L134 CoverageAnalysis]: Checked inductivity of 3271 backedges. 54 proven. 3213 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-19 04:53:21,849 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 04:53:22,849 INFO L134 CoverageAnalysis]: Checked inductivity of 3271 backedges. 54 proven. 1809 refuted. 0 times theorem prover too weak. 1408 trivial. 0 not checked. [2022-03-19 04:53:22,849 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 04:53:22,849 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1519996750] [2022-03-19 04:53:22,850 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 04:53:22,850 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1061157600] [2022-03-19 04:53:22,850 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1061157600] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 04:53:22,850 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 04:53:22,850 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 60 [2022-03-19 04:53:22,850 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 04:53:22,850 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1527775197] [2022-03-19 04:53:22,850 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1527775197] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 04:53:22,850 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 04:53:22,850 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [31] imperfect sequences [] total 31 [2022-03-19 04:53:22,850 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1995241513] [2022-03-19 04:53:22,850 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 04:53:22,851 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-03-19 04:53:22,851 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 04:53:22,851 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-03-19 04:53:22,851 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1658, Invalid=1882, Unknown=0, NotChecked=0, Total=3540 [2022-03-19 04:53:22,852 INFO L87 Difference]: Start difference. First operand 263 states and 291 transitions. Second operand has 31 states, 31 states have (on average 6.483870967741935) internal successors, (201), 30 states have internal predecessors, (201), 30 states have call successors, (32), 30 states have call predecessors, (32), 28 states have return successors, (30), 28 states have call predecessors, (30), 29 states have call successors, (30) [2022-03-19 04:53:23,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 04:53:23,282 INFO L93 Difference]: Finished difference Result 277 states and 306 transitions. [2022-03-19 04:53:23,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2022-03-19 04:53:23,282 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 6.483870967741935) internal successors, (201), 30 states have internal predecessors, (201), 30 states have call successors, (32), 30 states have call predecessors, (32), 28 states have return successors, (30), 28 states have call predecessors, (30), 29 states have call successors, (30) Word has length 266 [2022-03-19 04:53:23,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 04:53:23,283 INFO L225 Difference]: With dead ends: 277 [2022-03-19 04:53:23,283 INFO L226 Difference]: Without dead ends: 272 [2022-03-19 04:53:23,284 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 558 GetRequests, 473 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 433 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=3251, Invalid=4231, Unknown=0, NotChecked=0, Total=7482 [2022-03-19 04:53:23,285 INFO L912 BasicCegarLoop]: 53 mSDtfsCounter, 92 mSDsluCounter, 257 mSDsCounter, 0 mSdLazyCounter, 172 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 310 SdHoareTripleChecker+Invalid, 200 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 172 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 04:53:23,285 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [92 Valid, 310 Invalid, 200 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 172 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 04:53:23,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 272 states. [2022-03-19 04:53:23,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 272 to 272. [2022-03-19 04:53:23,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 272 states, 208 states have (on average 1.1394230769230769) internal successors, (237), 208 states have internal predecessors, (237), 33 states have call successors, (33), 32 states have call predecessors, (33), 30 states have return successors, (31), 31 states have call predecessors, (31), 31 states have call successors, (31) [2022-03-19 04:53:23,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 272 states to 272 states and 301 transitions. [2022-03-19 04:53:23,306 INFO L78 Accepts]: Start accepts. Automaton has 272 states and 301 transitions. Word has length 266 [2022-03-19 04:53:23,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 04:53:23,307 INFO L478 AbstractCegarLoop]: Abstraction has 272 states and 301 transitions. [2022-03-19 04:53:23,307 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 6.483870967741935) internal successors, (201), 30 states have internal predecessors, (201), 30 states have call successors, (32), 30 states have call predecessors, (32), 28 states have return successors, (30), 28 states have call predecessors, (30), 29 states have call successors, (30) [2022-03-19 04:53:23,307 INFO L276 IsEmpty]: Start isEmpty. Operand 272 states and 301 transitions. [2022-03-19 04:53:23,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 276 [2022-03-19 04:53:23,308 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 04:53:23,308 INFO L500 BasicCegarLoop]: trace histogram [29, 29, 28, 28, 28, 28, 28, 28, 28, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 04:53:23,316 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2022-03-19 04:53:23,516 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 04:53:23,516 INFO L403 AbstractCegarLoop]: === Iteration 32 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 04:53:23,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 04:53:23,516 INFO L85 PathProgramCache]: Analyzing trace with hash -394085994, now seen corresponding path program 55 times [2022-03-19 04:53:23,516 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 04:53:23,516 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [822364778] [2022-03-19 04:53:23,517 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 04:53:23,517 INFO L85 PathProgramCache]: Analyzing trace with hash -394085994, now seen corresponding path program 56 times [2022-03-19 04:53:23,517 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 04:53:23,517 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2072795033] [2022-03-19 04:53:23,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 04:53:23,517 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 04:53:23,523 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 04:53:23,523 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1031054863] [2022-03-19 04:53:23,524 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 04:53:23,524 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 04:53:23,524 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 04:53:23,525 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 04:53:23,525 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2022-03-19 04:53:23,620 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 04:53:23,621 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 04:53:23,624 INFO L263 TraceCheckSpWp]: Trace formula consists of 653 conjuncts, 61 conjunts are in the unsatisfiable core [2022-03-19 04:53:23,626 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 04:53:24,280 INFO L134 CoverageAnalysis]: Checked inductivity of 3518 backedges. 56 proven. 3458 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-19 04:53:24,281 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 04:53:25,342 INFO L134 CoverageAnalysis]: Checked inductivity of 3518 backedges. 56 proven. 1946 refuted. 0 times theorem prover too weak. 1516 trivial. 0 not checked. [2022-03-19 04:53:25,342 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 04:53:25,343 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2072795033] [2022-03-19 04:53:25,343 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 04:53:25,343 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1031054863] [2022-03-19 04:53:25,343 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1031054863] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 04:53:25,343 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 04:53:25,343 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 62 [2022-03-19 04:53:25,343 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 04:53:25,343 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [822364778] [2022-03-19 04:53:25,343 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [822364778] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 04:53:25,343 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 04:53:25,343 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [32] imperfect sequences [] total 32 [2022-03-19 04:53:25,344 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1414159457] [2022-03-19 04:53:25,344 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 04:53:25,344 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-03-19 04:53:25,344 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 04:53:25,345 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-03-19 04:53:25,345 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1775, Invalid=2007, Unknown=0, NotChecked=0, Total=3782 [2022-03-19 04:53:25,345 INFO L87 Difference]: Start difference. First operand 272 states and 301 transitions. Second operand has 32 states, 32 states have (on average 6.5) internal successors, (208), 31 states have internal predecessors, (208), 31 states have call successors, (33), 31 states have call predecessors, (33), 29 states have return successors, (31), 29 states have call predecessors, (31), 30 states have call successors, (31) [2022-03-19 04:53:25,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 04:53:25,813 INFO L93 Difference]: Finished difference Result 286 states and 316 transitions. [2022-03-19 04:53:25,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2022-03-19 04:53:25,813 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 6.5) internal successors, (208), 31 states have internal predecessors, (208), 31 states have call successors, (33), 31 states have call predecessors, (33), 29 states have return successors, (31), 29 states have call predecessors, (31), 30 states have call successors, (31) Word has length 275 [2022-03-19 04:53:25,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 04:53:25,818 INFO L225 Difference]: With dead ends: 286 [2022-03-19 04:53:25,818 INFO L226 Difference]: Without dead ends: 281 [2022-03-19 04:53:25,829 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 577 GetRequests, 489 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 463 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=3483, Invalid=4527, Unknown=0, NotChecked=0, Total=8010 [2022-03-19 04:53:25,830 INFO L912 BasicCegarLoop]: 54 mSDtfsCounter, 101 mSDsluCounter, 246 mSDsCounter, 0 mSdLazyCounter, 175 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 300 SdHoareTripleChecker+Invalid, 203 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 175 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 04:53:25,830 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [101 Valid, 300 Invalid, 203 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 175 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 04:53:25,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 281 states. [2022-03-19 04:53:25,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 281 to 281. [2022-03-19 04:53:25,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 281 states, 215 states have (on average 1.1395348837209303) internal successors, (245), 215 states have internal predecessors, (245), 34 states have call successors, (34), 33 states have call predecessors, (34), 31 states have return successors, (32), 32 states have call predecessors, (32), 32 states have call successors, (32) [2022-03-19 04:53:25,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 281 states to 281 states and 311 transitions. [2022-03-19 04:53:25,855 INFO L78 Accepts]: Start accepts. Automaton has 281 states and 311 transitions. Word has length 275 [2022-03-19 04:53:25,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 04:53:25,856 INFO L478 AbstractCegarLoop]: Abstraction has 281 states and 311 transitions. [2022-03-19 04:53:25,856 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 6.5) internal successors, (208), 31 states have internal predecessors, (208), 31 states have call successors, (33), 31 states have call predecessors, (33), 29 states have return successors, (31), 29 states have call predecessors, (31), 30 states have call successors, (31) [2022-03-19 04:53:25,856 INFO L276 IsEmpty]: Start isEmpty. Operand 281 states and 311 transitions. [2022-03-19 04:53:25,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 285 [2022-03-19 04:53:25,857 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 04:53:25,857 INFO L500 BasicCegarLoop]: trace histogram [30, 30, 29, 29, 29, 29, 29, 29, 29, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 04:53:25,877 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2022-03-19 04:53:26,057 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 04:53:26,058 INFO L403 AbstractCegarLoop]: === Iteration 33 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 04:53:26,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 04:53:26,058 INFO L85 PathProgramCache]: Analyzing trace with hash 1379905180, now seen corresponding path program 57 times [2022-03-19 04:53:26,058 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 04:53:26,058 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [396346011] [2022-03-19 04:53:26,059 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 04:53:26,059 INFO L85 PathProgramCache]: Analyzing trace with hash 1379905180, now seen corresponding path program 58 times [2022-03-19 04:53:26,059 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 04:53:26,059 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [476908679] [2022-03-19 04:53:26,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 04:53:26,059 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 04:53:26,066 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 04:53:26,066 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1190177734] [2022-03-19 04:53:26,066 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 04:53:26,066 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 04:53:26,067 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 04:53:26,068 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 04:53:26,069 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2022-03-19 04:53:26,647 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 04:53:26,647 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 04:53:26,651 INFO L263 TraceCheckSpWp]: Trace formula consists of 673 conjuncts, 63 conjunts are in the unsatisfiable core [2022-03-19 04:53:26,654 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 04:53:27,304 INFO L134 CoverageAnalysis]: Checked inductivity of 3774 backedges. 58 proven. 3712 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-19 04:53:27,305 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 04:53:28,409 INFO L134 CoverageAnalysis]: Checked inductivity of 3774 backedges. 58 proven. 2088 refuted. 0 times theorem prover too weak. 1628 trivial. 0 not checked. [2022-03-19 04:53:28,409 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 04:53:28,409 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [476908679] [2022-03-19 04:53:28,409 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 04:53:28,409 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1190177734] [2022-03-19 04:53:28,409 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1190177734] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 04:53:28,409 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 04:53:28,409 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 64 [2022-03-19 04:53:28,410 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 04:53:28,410 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [396346011] [2022-03-19 04:53:28,410 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [396346011] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 04:53:28,410 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 04:53:28,410 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [33] imperfect sequences [] total 33 [2022-03-19 04:53:28,410 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1845939820] [2022-03-19 04:53:28,410 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 04:53:28,410 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-03-19 04:53:28,410 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 04:53:28,411 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-03-19 04:53:28,411 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1896, Invalid=2136, Unknown=0, NotChecked=0, Total=4032 [2022-03-19 04:53:28,411 INFO L87 Difference]: Start difference. First operand 281 states and 311 transitions. Second operand has 33 states, 33 states have (on average 6.515151515151516) internal successors, (215), 32 states have internal predecessors, (215), 32 states have call successors, (34), 32 states have call predecessors, (34), 30 states have return successors, (32), 30 states have call predecessors, (32), 31 states have call successors, (32) [2022-03-19 04:53:28,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 04:53:28,935 INFO L93 Difference]: Finished difference Result 295 states and 326 transitions. [2022-03-19 04:53:28,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2022-03-19 04:53:28,935 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 6.515151515151516) internal successors, (215), 32 states have internal predecessors, (215), 32 states have call successors, (34), 32 states have call predecessors, (34), 30 states have return successors, (32), 30 states have call predecessors, (32), 31 states have call successors, (32) Word has length 284 [2022-03-19 04:53:28,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 04:53:28,936 INFO L225 Difference]: With dead ends: 295 [2022-03-19 04:53:28,936 INFO L226 Difference]: Without dead ends: 290 [2022-03-19 04:53:28,937 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 596 GetRequests, 505 SyntacticMatches, 0 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 494 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=3723, Invalid=4833, Unknown=0, NotChecked=0, Total=8556 [2022-03-19 04:53:28,940 INFO L912 BasicCegarLoop]: 55 mSDtfsCounter, 127 mSDsluCounter, 265 mSDsCounter, 0 mSdLazyCounter, 168 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 127 SdHoareTripleChecker+Valid, 320 SdHoareTripleChecker+Invalid, 210 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 168 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-19 04:53:28,940 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [127 Valid, 320 Invalid, 210 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 168 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-19 04:53:28,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 290 states. [2022-03-19 04:53:28,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 290 to 290. [2022-03-19 04:53:28,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 290 states, 222 states have (on average 1.1396396396396395) internal successors, (253), 222 states have internal predecessors, (253), 35 states have call successors, (35), 34 states have call predecessors, (35), 32 states have return successors, (33), 33 states have call predecessors, (33), 33 states have call successors, (33) [2022-03-19 04:53:28,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 290 states to 290 states and 321 transitions. [2022-03-19 04:53:28,964 INFO L78 Accepts]: Start accepts. Automaton has 290 states and 321 transitions. Word has length 284 [2022-03-19 04:53:28,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 04:53:28,964 INFO L478 AbstractCegarLoop]: Abstraction has 290 states and 321 transitions. [2022-03-19 04:53:28,964 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 6.515151515151516) internal successors, (215), 32 states have internal predecessors, (215), 32 states have call successors, (34), 32 states have call predecessors, (34), 30 states have return successors, (32), 30 states have call predecessors, (32), 31 states have call successors, (32) [2022-03-19 04:53:28,964 INFO L276 IsEmpty]: Start isEmpty. Operand 290 states and 321 transitions. [2022-03-19 04:53:28,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 294 [2022-03-19 04:53:28,965 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 04:53:28,965 INFO L500 BasicCegarLoop]: trace histogram [31, 31, 30, 30, 30, 30, 30, 30, 30, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 04:53:28,973 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2022-03-19 04:53:29,171 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2022-03-19 04:53:29,172 INFO L403 AbstractCegarLoop]: === Iteration 34 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 04:53:29,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 04:53:29,172 INFO L85 PathProgramCache]: Analyzing trace with hash 520028246, now seen corresponding path program 59 times [2022-03-19 04:53:29,172 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 04:53:29,172 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [681938142] [2022-03-19 04:53:29,173 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 04:53:29,173 INFO L85 PathProgramCache]: Analyzing trace with hash 520028246, now seen corresponding path program 60 times [2022-03-19 04:53:29,173 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 04:53:29,173 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1505869885] [2022-03-19 04:53:29,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 04:53:29,173 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 04:53:29,180 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 04:53:29,181 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1383656445] [2022-03-19 04:53:29,181 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-19 04:53:29,181 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 04:53:29,181 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 04:53:29,182 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 04:53:29,182 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2022-03-19 04:53:34,265 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 31 check-sat command(s) [2022-03-19 04:53:34,266 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 04:53:34,273 INFO L263 TraceCheckSpWp]: Trace formula consists of 693 conjuncts, 65 conjunts are in the unsatisfiable core [2022-03-19 04:53:34,277 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 04:53:34,948 INFO L134 CoverageAnalysis]: Checked inductivity of 4039 backedges. 60 proven. 3975 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-19 04:53:34,948 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 04:53:36,220 INFO L134 CoverageAnalysis]: Checked inductivity of 4039 backedges. 60 proven. 2235 refuted. 0 times theorem prover too weak. 1744 trivial. 0 not checked. [2022-03-19 04:53:36,220 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 04:53:36,220 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1505869885] [2022-03-19 04:53:36,220 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 04:53:36,220 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1383656445] [2022-03-19 04:53:36,220 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1383656445] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 04:53:36,221 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 04:53:36,221 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 66 [2022-03-19 04:53:36,221 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 04:53:36,221 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [681938142] [2022-03-19 04:53:36,221 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [681938142] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 04:53:36,221 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 04:53:36,221 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [34] imperfect sequences [] total 34 [2022-03-19 04:53:36,221 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1651267102] [2022-03-19 04:53:36,221 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 04:53:36,221 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-03-19 04:53:36,222 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 04:53:36,222 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-03-19 04:53:36,223 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2021, Invalid=2269, Unknown=0, NotChecked=0, Total=4290 [2022-03-19 04:53:36,223 INFO L87 Difference]: Start difference. First operand 290 states and 321 transitions. Second operand has 34 states, 34 states have (on average 6.529411764705882) internal successors, (222), 33 states have internal predecessors, (222), 33 states have call successors, (35), 33 states have call predecessors, (35), 31 states have return successors, (33), 31 states have call predecessors, (33), 32 states have call successors, (33) [2022-03-19 04:53:36,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 04:53:36,771 INFO L93 Difference]: Finished difference Result 304 states and 336 transitions. [2022-03-19 04:53:36,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2022-03-19 04:53:36,771 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 6.529411764705882) internal successors, (222), 33 states have internal predecessors, (222), 33 states have call successors, (35), 33 states have call predecessors, (35), 31 states have return successors, (33), 31 states have call predecessors, (33), 32 states have call successors, (33) Word has length 293 [2022-03-19 04:53:36,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 04:53:36,772 INFO L225 Difference]: With dead ends: 304 [2022-03-19 04:53:36,772 INFO L226 Difference]: Without dead ends: 299 [2022-03-19 04:53:36,773 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 615 GetRequests, 521 SyntacticMatches, 0 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 526 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=3971, Invalid=5149, Unknown=0, NotChecked=0, Total=9120 [2022-03-19 04:53:36,774 INFO L912 BasicCegarLoop]: 56 mSDtfsCounter, 115 mSDsluCounter, 260 mSDsCounter, 0 mSdLazyCounter, 197 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 115 SdHoareTripleChecker+Valid, 316 SdHoareTripleChecker+Invalid, 218 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 197 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 04:53:36,774 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [115 Valid, 316 Invalid, 218 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 197 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 04:53:36,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 299 states. [2022-03-19 04:53:36,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 299 to 299. [2022-03-19 04:53:36,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 299 states, 229 states have (on average 1.1397379912663756) internal successors, (261), 229 states have internal predecessors, (261), 36 states have call successors, (36), 35 states have call predecessors, (36), 33 states have return successors, (34), 34 states have call predecessors, (34), 34 states have call successors, (34) [2022-03-19 04:53:36,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 299 states to 299 states and 331 transitions. [2022-03-19 04:53:36,798 INFO L78 Accepts]: Start accepts. Automaton has 299 states and 331 transitions. Word has length 293 [2022-03-19 04:53:36,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 04:53:36,798 INFO L478 AbstractCegarLoop]: Abstraction has 299 states and 331 transitions. [2022-03-19 04:53:36,799 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 6.529411764705882) internal successors, (222), 33 states have internal predecessors, (222), 33 states have call successors, (35), 33 states have call predecessors, (35), 31 states have return successors, (33), 31 states have call predecessors, (33), 32 states have call successors, (33) [2022-03-19 04:53:36,799 INFO L276 IsEmpty]: Start isEmpty. Operand 299 states and 331 transitions. [2022-03-19 04:53:36,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 303 [2022-03-19 04:53:36,800 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 04:53:36,800 INFO L500 BasicCegarLoop]: trace histogram [32, 32, 31, 31, 31, 31, 31, 31, 31, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 04:53:36,807 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2022-03-19 04:53:37,007 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 04:53:37,008 INFO L403 AbstractCegarLoop]: === Iteration 35 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 04:53:37,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 04:53:37,008 INFO L85 PathProgramCache]: Analyzing trace with hash -213450788, now seen corresponding path program 61 times [2022-03-19 04:53:37,008 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 04:53:37,008 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1560063684] [2022-03-19 04:53:37,008 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 04:53:37,009 INFO L85 PathProgramCache]: Analyzing trace with hash -213450788, now seen corresponding path program 62 times [2022-03-19 04:53:37,009 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 04:53:37,009 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [774966418] [2022-03-19 04:53:37,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 04:53:37,009 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 04:53:37,015 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 04:53:37,016 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [788868290] [2022-03-19 04:53:37,016 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 04:53:37,016 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 04:53:37,016 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 04:53:37,017 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 04:53:37,018 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2022-03-19 04:53:37,105 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 04:53:37,105 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 04:53:37,109 INFO L263 TraceCheckSpWp]: Trace formula consists of 713 conjuncts, 67 conjunts are in the unsatisfiable core [2022-03-19 04:53:37,112 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 04:53:37,838 INFO L134 CoverageAnalysis]: Checked inductivity of 4313 backedges. 62 proven. 4247 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-19 04:53:37,839 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 04:53:39,123 INFO L134 CoverageAnalysis]: Checked inductivity of 4313 backedges. 62 proven. 2387 refuted. 0 times theorem prover too weak. 1864 trivial. 0 not checked. [2022-03-19 04:53:39,123 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 04:53:39,124 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [774966418] [2022-03-19 04:53:39,124 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 04:53:39,124 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [788868290] [2022-03-19 04:53:39,124 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [788868290] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 04:53:39,124 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 04:53:39,124 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 68 [2022-03-19 04:53:39,124 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 04:53:39,124 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1560063684] [2022-03-19 04:53:39,124 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1560063684] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 04:53:39,124 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 04:53:39,124 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [35] imperfect sequences [] total 35 [2022-03-19 04:53:39,124 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [769156663] [2022-03-19 04:53:39,124 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 04:53:39,125 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-03-19 04:53:39,125 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 04:53:39,125 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-03-19 04:53:39,126 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2150, Invalid=2406, Unknown=0, NotChecked=0, Total=4556 [2022-03-19 04:53:39,126 INFO L87 Difference]: Start difference. First operand 299 states and 331 transitions. Second operand has 35 states, 35 states have (on average 6.542857142857143) internal successors, (229), 34 states have internal predecessors, (229), 34 states have call successors, (36), 34 states have call predecessors, (36), 32 states have return successors, (34), 32 states have call predecessors, (34), 33 states have call successors, (34) [2022-03-19 04:53:39,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 04:53:39,734 INFO L93 Difference]: Finished difference Result 313 states and 346 transitions. [2022-03-19 04:53:39,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2022-03-19 04:53:39,735 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 6.542857142857143) internal successors, (229), 34 states have internal predecessors, (229), 34 states have call successors, (36), 34 states have call predecessors, (36), 32 states have return successors, (34), 32 states have call predecessors, (34), 33 states have call successors, (34) Word has length 302 [2022-03-19 04:53:39,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 04:53:39,736 INFO L225 Difference]: With dead ends: 313 [2022-03-19 04:53:39,736 INFO L226 Difference]: Without dead ends: 308 [2022-03-19 04:53:39,737 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 634 GetRequests, 537 SyntacticMatches, 0 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 559 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=4227, Invalid=5475, Unknown=0, NotChecked=0, Total=9702 [2022-03-19 04:53:39,737 INFO L912 BasicCegarLoop]: 57 mSDtfsCounter, 134 mSDsluCounter, 261 mSDsCounter, 0 mSdLazyCounter, 193 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 134 SdHoareTripleChecker+Valid, 318 SdHoareTripleChecker+Invalid, 214 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 193 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-19 04:53:39,737 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [134 Valid, 318 Invalid, 214 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 193 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-19 04:53:39,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 308 states. [2022-03-19 04:53:39,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 308 to 308. [2022-03-19 04:53:39,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 308 states, 236 states have (on average 1.1398305084745763) internal successors, (269), 236 states have internal predecessors, (269), 37 states have call successors, (37), 36 states have call predecessors, (37), 34 states have return successors, (35), 35 states have call predecessors, (35), 35 states have call successors, (35) [2022-03-19 04:53:39,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 308 states to 308 states and 341 transitions. [2022-03-19 04:53:39,763 INFO L78 Accepts]: Start accepts. Automaton has 308 states and 341 transitions. Word has length 302 [2022-03-19 04:53:39,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 04:53:39,763 INFO L478 AbstractCegarLoop]: Abstraction has 308 states and 341 transitions. [2022-03-19 04:53:39,764 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 6.542857142857143) internal successors, (229), 34 states have internal predecessors, (229), 34 states have call successors, (36), 34 states have call predecessors, (36), 32 states have return successors, (34), 32 states have call predecessors, (34), 33 states have call successors, (34) [2022-03-19 04:53:39,764 INFO L276 IsEmpty]: Start isEmpty. Operand 308 states and 341 transitions. [2022-03-19 04:53:39,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 312 [2022-03-19 04:53:39,765 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 04:53:39,765 INFO L500 BasicCegarLoop]: trace histogram [33, 33, 32, 32, 32, 32, 32, 32, 32, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 04:53:39,795 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Ended with exit code 0 [2022-03-19 04:53:39,982 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2022-03-19 04:53:39,983 INFO L403 AbstractCegarLoop]: === Iteration 36 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 04:53:39,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 04:53:39,983 INFO L85 PathProgramCache]: Analyzing trace with hash 83826454, now seen corresponding path program 63 times [2022-03-19 04:53:39,983 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 04:53:39,983 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1116308618] [2022-03-19 04:53:39,983 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 04:53:39,984 INFO L85 PathProgramCache]: Analyzing trace with hash 83826454, now seen corresponding path program 64 times [2022-03-19 04:53:39,984 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 04:53:39,984 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [112522893] [2022-03-19 04:53:39,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 04:53:39,984 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 04:53:39,991 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 04:53:39,991 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1941283525] [2022-03-19 04:53:39,991 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 04:53:39,991 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 04:53:39,991 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 04:53:39,992 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 04:53:39,993 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2022-03-19 04:53:40,293 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 04:53:40,293 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 04:53:40,296 INFO L263 TraceCheckSpWp]: Trace formula consists of 733 conjuncts, 69 conjunts are in the unsatisfiable core [2022-03-19 04:53:40,300 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 04:53:41,071 INFO L134 CoverageAnalysis]: Checked inductivity of 4596 backedges. 64 proven. 4528 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-19 04:53:41,071 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 04:53:42,377 INFO L134 CoverageAnalysis]: Checked inductivity of 4596 backedges. 64 proven. 2544 refuted. 0 times theorem prover too weak. 1988 trivial. 0 not checked. [2022-03-19 04:53:42,377 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 04:53:42,377 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [112522893] [2022-03-19 04:53:42,377 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 04:53:42,378 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1941283525] [2022-03-19 04:53:42,378 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1941283525] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 04:53:42,378 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 04:53:42,378 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 70 [2022-03-19 04:53:42,378 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 04:53:42,378 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1116308618] [2022-03-19 04:53:42,378 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1116308618] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 04:53:42,378 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 04:53:42,378 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [36] imperfect sequences [] total 36 [2022-03-19 04:53:42,378 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1494467709] [2022-03-19 04:53:42,378 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 04:53:42,379 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-03-19 04:53:42,379 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 04:53:42,379 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-03-19 04:53:42,379 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2283, Invalid=2547, Unknown=0, NotChecked=0, Total=4830 [2022-03-19 04:53:42,379 INFO L87 Difference]: Start difference. First operand 308 states and 341 transitions. Second operand has 36 states, 36 states have (on average 6.555555555555555) internal successors, (236), 35 states have internal predecessors, (236), 35 states have call successors, (37), 35 states have call predecessors, (37), 33 states have return successors, (35), 33 states have call predecessors, (35), 34 states have call successors, (35) [2022-03-19 04:53:43,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 04:53:43,021 INFO L93 Difference]: Finished difference Result 322 states and 356 transitions. [2022-03-19 04:53:43,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2022-03-19 04:53:43,022 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 6.555555555555555) internal successors, (236), 35 states have internal predecessors, (236), 35 states have call successors, (37), 35 states have call predecessors, (37), 33 states have return successors, (35), 33 states have call predecessors, (35), 34 states have call successors, (35) Word has length 311 [2022-03-19 04:53:43,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 04:53:43,023 INFO L225 Difference]: With dead ends: 322 [2022-03-19 04:53:43,023 INFO L226 Difference]: Without dead ends: 317 [2022-03-19 04:53:43,024 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 653 GetRequests, 553 SyntacticMatches, 0 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 593 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=4491, Invalid=5811, Unknown=0, NotChecked=0, Total=10302 [2022-03-19 04:53:43,024 INFO L912 BasicCegarLoop]: 58 mSDtfsCounter, 104 mSDsluCounter, 274 mSDsCounter, 0 mSdLazyCounter, 230 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 104 SdHoareTripleChecker+Valid, 332 SdHoareTripleChecker+Invalid, 251 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 230 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-19 04:53:43,025 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [104 Valid, 332 Invalid, 251 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 230 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-19 04:53:43,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 317 states. [2022-03-19 04:53:43,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 317 to 317. [2022-03-19 04:53:43,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 317 states, 243 states have (on average 1.139917695473251) internal successors, (277), 243 states have internal predecessors, (277), 38 states have call successors, (38), 37 states have call predecessors, (38), 35 states have return successors, (36), 36 states have call predecessors, (36), 36 states have call successors, (36) [2022-03-19 04:53:43,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 317 states to 317 states and 351 transitions. [2022-03-19 04:53:43,050 INFO L78 Accepts]: Start accepts. Automaton has 317 states and 351 transitions. Word has length 311 [2022-03-19 04:53:43,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 04:53:43,051 INFO L478 AbstractCegarLoop]: Abstraction has 317 states and 351 transitions. [2022-03-19 04:53:43,051 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 6.555555555555555) internal successors, (236), 35 states have internal predecessors, (236), 35 states have call successors, (37), 35 states have call predecessors, (37), 33 states have return successors, (35), 33 states have call predecessors, (35), 34 states have call successors, (35) [2022-03-19 04:53:43,051 INFO L276 IsEmpty]: Start isEmpty. Operand 317 states and 351 transitions. [2022-03-19 04:53:43,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 321 [2022-03-19 04:53:43,052 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 04:53:43,052 INFO L500 BasicCegarLoop]: trace histogram [34, 34, 33, 33, 33, 33, 33, 33, 33, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 04:53:43,058 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2022-03-19 04:53:43,258 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 04:53:43,258 INFO L403 AbstractCegarLoop]: === Iteration 37 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 04:53:43,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 04:53:43,258 INFO L85 PathProgramCache]: Analyzing trace with hash 1410629916, now seen corresponding path program 65 times [2022-03-19 04:53:43,258 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 04:53:43,258 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1618249807] [2022-03-19 04:53:43,259 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 04:53:43,259 INFO L85 PathProgramCache]: Analyzing trace with hash 1410629916, now seen corresponding path program 66 times [2022-03-19 04:53:43,259 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 04:53:43,259 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [139609722] [2022-03-19 04:53:43,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 04:53:43,259 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 04:53:43,266 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 04:53:43,266 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1318557723] [2022-03-19 04:53:43,266 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-19 04:53:43,266 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 04:53:43,266 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 04:53:43,267 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 04:53:43,268 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2022-03-19 04:58:48,688 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 34 check-sat command(s) [2022-03-19 04:58:48,689 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 04:58:48,778 INFO L263 TraceCheckSpWp]: Trace formula consists of 753 conjuncts, 71 conjunts are in the unsatisfiable core [2022-03-19 04:58:48,782 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 04:58:49,526 INFO L134 CoverageAnalysis]: Checked inductivity of 4888 backedges. 66 proven. 4818 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-19 04:58:49,527 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 04:58:50,879 INFO L134 CoverageAnalysis]: Checked inductivity of 4888 backedges. 66 proven. 2706 refuted. 0 times theorem prover too weak. 2116 trivial. 0 not checked. [2022-03-19 04:58:50,879 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 04:58:50,879 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [139609722] [2022-03-19 04:58:50,879 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 04:58:50,879 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1318557723] [2022-03-19 04:58:50,879 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1318557723] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 04:58:50,879 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 04:58:50,880 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 72 [2022-03-19 04:58:50,880 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 04:58:50,880 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1618249807] [2022-03-19 04:58:50,880 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1618249807] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 04:58:50,880 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 04:58:50,880 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [37] imperfect sequences [] total 37 [2022-03-19 04:58:50,880 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1638897217] [2022-03-19 04:58:50,880 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 04:58:50,881 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-03-19 04:58:50,881 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 04:58:50,881 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-03-19 04:58:50,881 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2420, Invalid=2692, Unknown=0, NotChecked=0, Total=5112 [2022-03-19 04:58:50,882 INFO L87 Difference]: Start difference. First operand 317 states and 351 transitions. Second operand has 37 states, 37 states have (on average 6.5675675675675675) internal successors, (243), 36 states have internal predecessors, (243), 36 states have call successors, (38), 36 states have call predecessors, (38), 34 states have return successors, (36), 34 states have call predecessors, (36), 35 states have call successors, (36) [2022-03-19 04:58:51,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 04:58:51,474 INFO L93 Difference]: Finished difference Result 331 states and 366 transitions. [2022-03-19 04:58:51,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2022-03-19 04:58:51,474 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 6.5675675675675675) internal successors, (243), 36 states have internal predecessors, (243), 36 states have call successors, (38), 36 states have call predecessors, (38), 34 states have return successors, (36), 34 states have call predecessors, (36), 35 states have call successors, (36) Word has length 320 [2022-03-19 04:58:51,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 04:58:51,475 INFO L225 Difference]: With dead ends: 331 [2022-03-19 04:58:51,475 INFO L226 Difference]: Without dead ends: 326 [2022-03-19 04:58:51,477 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 672 GetRequests, 569 SyntacticMatches, 0 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 628 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=4763, Invalid=6157, Unknown=0, NotChecked=0, Total=10920 [2022-03-19 04:58:51,477 INFO L912 BasicCegarLoop]: 59 mSDtfsCounter, 108 mSDsluCounter, 287 mSDsCounter, 0 mSdLazyCounter, 239 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 346 SdHoareTripleChecker+Invalid, 253 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 239 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-19 04:58:51,477 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [108 Valid, 346 Invalid, 253 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 239 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-19 04:58:51,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 326 states. [2022-03-19 04:58:51,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 326 to 326. [2022-03-19 04:58:51,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 326 states, 250 states have (on average 1.14) internal successors, (285), 250 states have internal predecessors, (285), 39 states have call successors, (39), 38 states have call predecessors, (39), 36 states have return successors, (37), 37 states have call predecessors, (37), 37 states have call successors, (37) [2022-03-19 04:58:51,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 326 states to 326 states and 361 transitions. [2022-03-19 04:58:51,509 INFO L78 Accepts]: Start accepts. Automaton has 326 states and 361 transitions. Word has length 320 [2022-03-19 04:58:51,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 04:58:51,510 INFO L478 AbstractCegarLoop]: Abstraction has 326 states and 361 transitions. [2022-03-19 04:58:51,510 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 6.5675675675675675) internal successors, (243), 36 states have internal predecessors, (243), 36 states have call successors, (38), 36 states have call predecessors, (38), 34 states have return successors, (36), 34 states have call predecessors, (36), 35 states have call successors, (36) [2022-03-19 04:58:51,510 INFO L276 IsEmpty]: Start isEmpty. Operand 326 states and 361 transitions. [2022-03-19 04:58:51,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 330 [2022-03-19 04:58:51,511 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 04:58:51,511 INFO L500 BasicCegarLoop]: trace histogram [35, 35, 34, 34, 34, 34, 34, 34, 34, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 04:58:51,550 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2022-03-19 04:58:51,727 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2022-03-19 04:58:51,727 INFO L403 AbstractCegarLoop]: === Iteration 38 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 04:58:51,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 04:58:51,728 INFO L85 PathProgramCache]: Analyzing trace with hash 1328479702, now seen corresponding path program 67 times [2022-03-19 04:58:51,728 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 04:58:51,728 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2110598495] [2022-03-19 04:58:51,728 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 04:58:51,728 INFO L85 PathProgramCache]: Analyzing trace with hash 1328479702, now seen corresponding path program 68 times [2022-03-19 04:58:51,728 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 04:58:51,728 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [715891260] [2022-03-19 04:58:51,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 04:58:51,729 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 04:58:51,735 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 04:58:51,735 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [496820737] [2022-03-19 04:58:51,735 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 04:58:51,736 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 04:58:51,736 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 04:58:51,737 INFO L229 MonitoredProcess]: Starting monitored process 39 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 04:58:51,737 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2022-03-19 04:58:51,829 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 04:58:51,829 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 04:58:51,832 INFO L263 TraceCheckSpWp]: Trace formula consists of 773 conjuncts, 73 conjunts are in the unsatisfiable core [2022-03-19 04:58:51,836 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 04:58:52,603 INFO L134 CoverageAnalysis]: Checked inductivity of 5189 backedges. 68 proven. 5117 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-19 04:58:52,604 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 04:58:54,045 INFO L134 CoverageAnalysis]: Checked inductivity of 5189 backedges. 68 proven. 2873 refuted. 0 times theorem prover too weak. 2248 trivial. 0 not checked. [2022-03-19 04:58:54,046 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 04:58:54,046 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [715891260] [2022-03-19 04:58:54,046 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 04:58:54,046 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [496820737] [2022-03-19 04:58:54,046 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [496820737] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 04:58:54,046 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 04:58:54,046 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 74 [2022-03-19 04:58:54,046 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 04:58:54,047 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2110598495] [2022-03-19 04:58:54,047 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2110598495] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 04:58:54,047 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 04:58:54,047 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [38] imperfect sequences [] total 38 [2022-03-19 04:58:54,047 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [213786565] [2022-03-19 04:58:54,047 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 04:58:54,047 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-03-19 04:58:54,047 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 04:58:54,048 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-03-19 04:58:54,048 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2561, Invalid=2841, Unknown=0, NotChecked=0, Total=5402 [2022-03-19 04:58:54,048 INFO L87 Difference]: Start difference. First operand 326 states and 361 transitions. Second operand has 38 states, 38 states have (on average 6.578947368421052) internal successors, (250), 37 states have internal predecessors, (250), 37 states have call successors, (39), 37 states have call predecessors, (39), 35 states have return successors, (37), 35 states have call predecessors, (37), 36 states have call successors, (37) [2022-03-19 04:58:54,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 04:58:54,674 INFO L93 Difference]: Finished difference Result 340 states and 376 transitions. [2022-03-19 04:58:54,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2022-03-19 04:58:54,675 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 6.578947368421052) internal successors, (250), 37 states have internal predecessors, (250), 37 states have call successors, (39), 37 states have call predecessors, (39), 35 states have return successors, (37), 35 states have call predecessors, (37), 36 states have call successors, (37) Word has length 329 [2022-03-19 04:58:54,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 04:58:54,676 INFO L225 Difference]: With dead ends: 340 [2022-03-19 04:58:54,676 INFO L226 Difference]: Without dead ends: 335 [2022-03-19 04:58:54,677 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 691 GetRequests, 585 SyntacticMatches, 0 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 664 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=5043, Invalid=6513, Unknown=0, NotChecked=0, Total=11556 [2022-03-19 04:58:54,677 INFO L912 BasicCegarLoop]: 60 mSDtfsCounter, 106 mSDsluCounter, 300 mSDsCounter, 0 mSdLazyCounter, 210 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 360 SdHoareTripleChecker+Invalid, 224 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 210 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-19 04:58:54,677 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [106 Valid, 360 Invalid, 224 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 210 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-19 04:58:54,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 335 states. [2022-03-19 04:58:54,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 335 to 335. [2022-03-19 04:58:54,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 335 states, 257 states have (on average 1.140077821011673) internal successors, (293), 257 states have internal predecessors, (293), 40 states have call successors, (40), 39 states have call predecessors, (40), 37 states have return successors, (38), 38 states have call predecessors, (38), 38 states have call successors, (38) [2022-03-19 04:58:54,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 335 states to 335 states and 371 transitions. [2022-03-19 04:58:54,704 INFO L78 Accepts]: Start accepts. Automaton has 335 states and 371 transitions. Word has length 329 [2022-03-19 04:58:54,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 04:58:54,704 INFO L478 AbstractCegarLoop]: Abstraction has 335 states and 371 transitions. [2022-03-19 04:58:54,704 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 6.578947368421052) internal successors, (250), 37 states have internal predecessors, (250), 37 states have call successors, (39), 37 states have call predecessors, (39), 35 states have return successors, (37), 35 states have call predecessors, (37), 36 states have call successors, (37) [2022-03-19 04:58:54,704 INFO L276 IsEmpty]: Start isEmpty. Operand 335 states and 371 transitions. [2022-03-19 04:58:54,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 339 [2022-03-19 04:58:54,705 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 04:58:54,706 INFO L500 BasicCegarLoop]: trace histogram [36, 36, 35, 35, 35, 35, 35, 35, 35, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 04:58:54,723 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2022-03-19 04:58:54,919 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2022-03-19 04:58:54,919 INFO L403 AbstractCegarLoop]: === Iteration 39 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 04:58:54,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 04:58:54,920 INFO L85 PathProgramCache]: Analyzing trace with hash 1098658396, now seen corresponding path program 69 times [2022-03-19 04:58:54,920 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 04:58:54,920 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [244287518] [2022-03-19 04:58:54,920 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 04:58:54,920 INFO L85 PathProgramCache]: Analyzing trace with hash 1098658396, now seen corresponding path program 70 times [2022-03-19 04:58:54,920 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 04:58:54,920 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1127026368] [2022-03-19 04:58:54,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 04:58:54,921 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 04:58:54,927 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 04:58:54,927 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1407918656] [2022-03-19 04:58:54,927 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 04:58:54,928 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 04:58:54,928 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 04:58:54,929 INFO L229 MonitoredProcess]: Starting monitored process 40 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 04:58:54,929 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2022-03-19 04:58:55,038 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 04:58:55,038 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 04:58:55,041 INFO L263 TraceCheckSpWp]: Trace formula consists of 793 conjuncts, 75 conjunts are in the unsatisfiable core [2022-03-19 04:58:55,045 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 04:58:55,853 INFO L134 CoverageAnalysis]: Checked inductivity of 5499 backedges. 70 proven. 5425 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-19 04:58:55,854 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 04:58:57,359 INFO L134 CoverageAnalysis]: Checked inductivity of 5499 backedges. 70 proven. 3045 refuted. 0 times theorem prover too weak. 2384 trivial. 0 not checked. [2022-03-19 04:58:57,360 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 04:58:57,360 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1127026368] [2022-03-19 04:58:57,360 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 04:58:57,360 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1407918656] [2022-03-19 04:58:57,360 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1407918656] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 04:58:57,360 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 04:58:57,360 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 76 [2022-03-19 04:58:57,360 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 04:58:57,360 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [244287518] [2022-03-19 04:58:57,360 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [244287518] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 04:58:57,360 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 04:58:57,360 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [39] imperfect sequences [] total 39 [2022-03-19 04:58:57,361 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [7179798] [2022-03-19 04:58:57,361 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 04:58:57,361 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-03-19 04:58:57,361 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 04:58:57,362 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-03-19 04:58:57,362 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2706, Invalid=2994, Unknown=0, NotChecked=0, Total=5700 [2022-03-19 04:58:57,371 INFO L87 Difference]: Start difference. First operand 335 states and 371 transitions. Second operand has 39 states, 39 states have (on average 6.589743589743589) internal successors, (257), 38 states have internal predecessors, (257), 38 states have call successors, (40), 38 states have call predecessors, (40), 36 states have return successors, (38), 36 states have call predecessors, (38), 37 states have call successors, (38) [2022-03-19 04:58:58,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 04:58:58,020 INFO L93 Difference]: Finished difference Result 349 states and 386 transitions. [2022-03-19 04:58:58,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2022-03-19 04:58:58,021 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 6.589743589743589) internal successors, (257), 38 states have internal predecessors, (257), 38 states have call successors, (40), 38 states have call predecessors, (40), 36 states have return successors, (38), 36 states have call predecessors, (38), 37 states have call successors, (38) Word has length 338 [2022-03-19 04:58:58,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 04:58:58,030 INFO L225 Difference]: With dead ends: 349 [2022-03-19 04:58:58,030 INFO L226 Difference]: Without dead ends: 344 [2022-03-19 04:58:58,032 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 710 GetRequests, 601 SyntacticMatches, 0 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 701 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=5331, Invalid=6879, Unknown=0, NotChecked=0, Total=12210 [2022-03-19 04:58:58,032 INFO L912 BasicCegarLoop]: 61 mSDtfsCounter, 126 mSDsluCounter, 307 mSDsCounter, 0 mSdLazyCounter, 221 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 126 SdHoareTripleChecker+Valid, 368 SdHoareTripleChecker+Invalid, 249 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 221 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-19 04:58:58,032 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [126 Valid, 368 Invalid, 249 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 221 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-19 04:58:58,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 344 states. [2022-03-19 04:58:58,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 344 to 344. [2022-03-19 04:58:58,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 344 states, 264 states have (on average 1.1401515151515151) internal successors, (301), 264 states have internal predecessors, (301), 41 states have call successors, (41), 40 states have call predecessors, (41), 38 states have return successors, (39), 39 states have call predecessors, (39), 39 states have call successors, (39) [2022-03-19 04:58:58,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 344 states to 344 states and 381 transitions. [2022-03-19 04:58:58,059 INFO L78 Accepts]: Start accepts. Automaton has 344 states and 381 transitions. Word has length 338 [2022-03-19 04:58:58,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 04:58:58,060 INFO L478 AbstractCegarLoop]: Abstraction has 344 states and 381 transitions. [2022-03-19 04:58:58,060 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 6.589743589743589) internal successors, (257), 38 states have internal predecessors, (257), 38 states have call successors, (40), 38 states have call predecessors, (40), 36 states have return successors, (38), 36 states have call predecessors, (38), 37 states have call successors, (38) [2022-03-19 04:58:58,060 INFO L276 IsEmpty]: Start isEmpty. Operand 344 states and 381 transitions. [2022-03-19 04:58:58,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 348 [2022-03-19 04:58:58,061 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 04:58:58,061 INFO L500 BasicCegarLoop]: trace histogram [37, 37, 36, 36, 36, 36, 36, 36, 36, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 04:58:58,078 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2022-03-19 04:58:58,264 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2022-03-19 04:58:58,265 INFO L403 AbstractCegarLoop]: === Iteration 40 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 04:58:58,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 04:58:58,265 INFO L85 PathProgramCache]: Analyzing trace with hash 1597682838, now seen corresponding path program 71 times [2022-03-19 04:58:58,265 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 04:58:58,265 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2133294217] [2022-03-19 04:58:58,265 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 04:58:58,266 INFO L85 PathProgramCache]: Analyzing trace with hash 1597682838, now seen corresponding path program 72 times [2022-03-19 04:58:58,266 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 04:58:58,266 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1033558037] [2022-03-19 04:58:58,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 04:58:58,266 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 04:58:58,278 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 04:58:58,278 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1055809545] [2022-03-19 04:58:58,278 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-19 04:58:58,278 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 04:58:58,278 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 04:58:58,280 INFO L229 MonitoredProcess]: Starting monitored process 41 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 04:58:58,281 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2022-03-19 04:59:00,462 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 37 check-sat command(s) [2022-03-19 04:59:00,463 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 04:59:00,470 INFO L263 TraceCheckSpWp]: Trace formula consists of 813 conjuncts, 77 conjunts are in the unsatisfiable core [2022-03-19 04:59:00,473 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 04:59:01,308 INFO L134 CoverageAnalysis]: Checked inductivity of 5818 backedges. 72 proven. 5742 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-19 04:59:01,308 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 04:59:02,861 INFO L134 CoverageAnalysis]: Checked inductivity of 5818 backedges. 72 proven. 3222 refuted. 0 times theorem prover too weak. 2524 trivial. 0 not checked. [2022-03-19 04:59:02,862 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 04:59:02,862 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1033558037] [2022-03-19 04:59:02,862 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 04:59:02,862 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1055809545] [2022-03-19 04:59:02,862 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1055809545] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 04:59:02,862 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 04:59:02,862 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40] total 78 [2022-03-19 04:59:02,862 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 04:59:02,862 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2133294217] [2022-03-19 04:59:02,862 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2133294217] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 04:59:02,862 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 04:59:02,862 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [40] imperfect sequences [] total 40 [2022-03-19 04:59:02,863 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1495862535] [2022-03-19 04:59:02,863 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 04:59:02,863 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-03-19 04:59:02,863 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 04:59:02,863 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-03-19 04:59:02,864 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2855, Invalid=3151, Unknown=0, NotChecked=0, Total=6006 [2022-03-19 04:59:02,864 INFO L87 Difference]: Start difference. First operand 344 states and 381 transitions. Second operand has 40 states, 40 states have (on average 6.6) internal successors, (264), 39 states have internal predecessors, (264), 39 states have call successors, (41), 39 states have call predecessors, (41), 37 states have return successors, (39), 37 states have call predecessors, (39), 38 states have call successors, (39) [2022-03-19 04:59:03,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 04:59:03,533 INFO L93 Difference]: Finished difference Result 358 states and 396 transitions. [2022-03-19 04:59:03,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2022-03-19 04:59:03,533 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 6.6) internal successors, (264), 39 states have internal predecessors, (264), 39 states have call successors, (41), 39 states have call predecessors, (41), 37 states have return successors, (39), 37 states have call predecessors, (39), 38 states have call successors, (39) Word has length 347 [2022-03-19 04:59:03,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 04:59:03,534 INFO L225 Difference]: With dead ends: 358 [2022-03-19 04:59:03,534 INFO L226 Difference]: Without dead ends: 353 [2022-03-19 04:59:03,535 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 729 GetRequests, 617 SyntacticMatches, 0 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 739 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=5627, Invalid=7255, Unknown=0, NotChecked=0, Total=12882 [2022-03-19 04:59:03,535 INFO L912 BasicCegarLoop]: 62 mSDtfsCounter, 130 mSDsluCounter, 308 mSDsCounter, 0 mSdLazyCounter, 232 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 130 SdHoareTripleChecker+Valid, 370 SdHoareTripleChecker+Invalid, 267 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 232 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-19 04:59:03,536 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [130 Valid, 370 Invalid, 267 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 232 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-19 04:59:03,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 353 states. [2022-03-19 04:59:03,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 353 to 353. [2022-03-19 04:59:03,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 353 states, 271 states have (on average 1.1402214022140222) internal successors, (309), 271 states have internal predecessors, (309), 42 states have call successors, (42), 41 states have call predecessors, (42), 39 states have return successors, (40), 40 states have call predecessors, (40), 40 states have call successors, (40) [2022-03-19 04:59:03,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 353 states to 353 states and 391 transitions. [2022-03-19 04:59:03,564 INFO L78 Accepts]: Start accepts. Automaton has 353 states and 391 transitions. Word has length 347 [2022-03-19 04:59:03,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 04:59:03,564 INFO L478 AbstractCegarLoop]: Abstraction has 353 states and 391 transitions. [2022-03-19 04:59:03,564 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 6.6) internal successors, (264), 39 states have internal predecessors, (264), 39 states have call successors, (41), 39 states have call predecessors, (41), 37 states have return successors, (39), 37 states have call predecessors, (39), 38 states have call successors, (39) [2022-03-19 04:59:03,564 INFO L276 IsEmpty]: Start isEmpty. Operand 353 states and 391 transitions. [2022-03-19 04:59:03,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 357 [2022-03-19 04:59:03,565 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 04:59:03,566 INFO L500 BasicCegarLoop]: trace histogram [38, 38, 37, 37, 37, 37, 37, 37, 37, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 04:59:03,575 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2022-03-19 04:59:03,775 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2022-03-19 04:59:03,776 INFO L403 AbstractCegarLoop]: === Iteration 41 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 04:59:03,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 04:59:03,776 INFO L85 PathProgramCache]: Analyzing trace with hash 2068976540, now seen corresponding path program 73 times [2022-03-19 04:59:03,776 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 04:59:03,776 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [956488902] [2022-03-19 04:59:03,776 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 04:59:03,777 INFO L85 PathProgramCache]: Analyzing trace with hash 2068976540, now seen corresponding path program 74 times [2022-03-19 04:59:03,777 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 04:59:03,777 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1808630189] [2022-03-19 04:59:03,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 04:59:03,777 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 04:59:03,784 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 04:59:03,784 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1262696886] [2022-03-19 04:59:03,784 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 04:59:03,784 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 04:59:03,785 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 04:59:03,785 INFO L229 MonitoredProcess]: Starting monitored process 42 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 04:59:03,803 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2022-03-19 04:59:03,889 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 04:59:03,889 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 04:59:03,893 INFO L263 TraceCheckSpWp]: Trace formula consists of 833 conjuncts, 79 conjunts are in the unsatisfiable core [2022-03-19 04:59:03,897 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 04:59:04,794 INFO L134 CoverageAnalysis]: Checked inductivity of 6146 backedges. 74 proven. 6068 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-19 04:59:04,794 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 04:59:06,426 INFO L134 CoverageAnalysis]: Checked inductivity of 6146 backedges. 74 proven. 3404 refuted. 0 times theorem prover too weak. 2668 trivial. 0 not checked. [2022-03-19 04:59:06,427 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 04:59:06,427 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1808630189] [2022-03-19 04:59:06,427 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 04:59:06,427 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1262696886] [2022-03-19 04:59:06,427 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1262696886] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 04:59:06,427 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 04:59:06,427 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41] total 80 [2022-03-19 04:59:06,427 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 04:59:06,427 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [956488902] [2022-03-19 04:59:06,427 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [956488902] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 04:59:06,427 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 04:59:06,427 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [41] imperfect sequences [] total 41 [2022-03-19 04:59:06,428 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [113915247] [2022-03-19 04:59:06,428 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 04:59:06,428 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-03-19 04:59:06,428 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 04:59:06,428 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-03-19 04:59:06,429 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3008, Invalid=3312, Unknown=0, NotChecked=0, Total=6320 [2022-03-19 04:59:06,429 INFO L87 Difference]: Start difference. First operand 353 states and 391 transitions. Second operand has 41 states, 41 states have (on average 6.609756097560975) internal successors, (271), 40 states have internal predecessors, (271), 40 states have call successors, (42), 40 states have call predecessors, (42), 38 states have return successors, (40), 38 states have call predecessors, (40), 39 states have call successors, (40) [2022-03-19 04:59:07,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 04:59:07,143 INFO L93 Difference]: Finished difference Result 367 states and 406 transitions. [2022-03-19 04:59:07,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2022-03-19 04:59:07,144 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 6.609756097560975) internal successors, (271), 40 states have internal predecessors, (271), 40 states have call successors, (42), 40 states have call predecessors, (42), 38 states have return successors, (40), 38 states have call predecessors, (40), 39 states have call successors, (40) Word has length 356 [2022-03-19 04:59:07,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 04:59:07,145 INFO L225 Difference]: With dead ends: 367 [2022-03-19 04:59:07,145 INFO L226 Difference]: Without dead ends: 362 [2022-03-19 04:59:07,146 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 748 GetRequests, 633 SyntacticMatches, 0 SemanticMatches, 115 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 778 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=5931, Invalid=7641, Unknown=0, NotChecked=0, Total=13572 [2022-03-19 04:59:07,146 INFO L912 BasicCegarLoop]: 63 mSDtfsCounter, 150 mSDsluCounter, 315 mSDsCounter, 0 mSdLazyCounter, 250 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 150 SdHoareTripleChecker+Valid, 378 SdHoareTripleChecker+Invalid, 264 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 250 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-19 04:59:07,147 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [150 Valid, 378 Invalid, 264 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 250 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-19 04:59:07,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 362 states. [2022-03-19 04:59:07,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 362 to 362. [2022-03-19 04:59:07,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 362 states, 278 states have (on average 1.1402877697841727) internal successors, (317), 278 states have internal predecessors, (317), 43 states have call successors, (43), 42 states have call predecessors, (43), 40 states have return successors, (41), 41 states have call predecessors, (41), 41 states have call successors, (41) [2022-03-19 04:59:07,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 362 states to 362 states and 401 transitions. [2022-03-19 04:59:07,185 INFO L78 Accepts]: Start accepts. Automaton has 362 states and 401 transitions. Word has length 356 [2022-03-19 04:59:07,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 04:59:07,185 INFO L478 AbstractCegarLoop]: Abstraction has 362 states and 401 transitions. [2022-03-19 04:59:07,185 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 6.609756097560975) internal successors, (271), 40 states have internal predecessors, (271), 40 states have call successors, (42), 40 states have call predecessors, (42), 38 states have return successors, (40), 38 states have call predecessors, (40), 39 states have call successors, (40) [2022-03-19 04:59:07,185 INFO L276 IsEmpty]: Start isEmpty. Operand 362 states and 401 transitions. [2022-03-19 04:59:07,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 366 [2022-03-19 04:59:07,187 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 04:59:07,187 INFO L500 BasicCegarLoop]: trace histogram [39, 39, 38, 38, 38, 38, 38, 38, 38, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 04:59:07,209 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2022-03-19 04:59:07,403 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 04:59:07,404 INFO L403 AbstractCegarLoop]: === Iteration 42 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 04:59:07,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 04:59:07,404 INFO L85 PathProgramCache]: Analyzing trace with hash 63847254, now seen corresponding path program 75 times [2022-03-19 04:59:07,404 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 04:59:07,404 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1346042951] [2022-03-19 04:59:07,404 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 04:59:07,404 INFO L85 PathProgramCache]: Analyzing trace with hash 63847254, now seen corresponding path program 76 times [2022-03-19 04:59:07,405 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 04:59:07,405 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1663753153] [2022-03-19 04:59:07,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 04:59:07,405 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 04:59:07,413 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 04:59:07,413 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [594639064] [2022-03-19 04:59:07,413 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 04:59:07,413 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 04:59:07,413 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 04:59:07,414 INFO L229 MonitoredProcess]: Starting monitored process 43 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 04:59:07,415 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2022-03-19 04:59:07,808 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 04:59:07,808 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 04:59:07,811 INFO L263 TraceCheckSpWp]: Trace formula consists of 853 conjuncts, 81 conjunts are in the unsatisfiable core [2022-03-19 04:59:07,814 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 04:59:08,705 INFO L134 CoverageAnalysis]: Checked inductivity of 6483 backedges. 76 proven. 6403 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-19 04:59:08,705 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 04:59:10,442 INFO L134 CoverageAnalysis]: Checked inductivity of 6483 backedges. 76 proven. 3591 refuted. 0 times theorem prover too weak. 2816 trivial. 0 not checked. [2022-03-19 04:59:10,442 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 04:59:10,442 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1663753153] [2022-03-19 04:59:10,442 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 04:59:10,443 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [594639064] [2022-03-19 04:59:10,443 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [594639064] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 04:59:10,443 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 04:59:10,443 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42] total 82 [2022-03-19 04:59:10,443 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 04:59:10,443 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1346042951] [2022-03-19 04:59:10,443 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1346042951] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 04:59:10,443 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 04:59:10,443 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [42] imperfect sequences [] total 42 [2022-03-19 04:59:10,443 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2031072338] [2022-03-19 04:59:10,443 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 04:59:10,444 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-03-19 04:59:10,444 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 04:59:10,444 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-03-19 04:59:10,445 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3165, Invalid=3477, Unknown=0, NotChecked=0, Total=6642 [2022-03-19 04:59:10,445 INFO L87 Difference]: Start difference. First operand 362 states and 401 transitions. Second operand has 42 states, 42 states have (on average 6.619047619047619) internal successors, (278), 41 states have internal predecessors, (278), 41 states have call successors, (43), 41 states have call predecessors, (43), 39 states have return successors, (41), 39 states have call predecessors, (41), 40 states have call successors, (41) [2022-03-19 04:59:11,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 04:59:11,220 INFO L93 Difference]: Finished difference Result 376 states and 416 transitions. [2022-03-19 04:59:11,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2022-03-19 04:59:11,220 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 6.619047619047619) internal successors, (278), 41 states have internal predecessors, (278), 41 states have call successors, (43), 41 states have call predecessors, (43), 39 states have return successors, (41), 39 states have call predecessors, (41), 40 states have call successors, (41) Word has length 365 [2022-03-19 04:59:11,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 04:59:11,221 INFO L225 Difference]: With dead ends: 376 [2022-03-19 04:59:11,221 INFO L226 Difference]: Without dead ends: 371 [2022-03-19 04:59:11,223 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 767 GetRequests, 649 SyntacticMatches, 0 SemanticMatches, 118 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 818 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=6243, Invalid=8037, Unknown=0, NotChecked=0, Total=14280 [2022-03-19 04:59:11,223 INFO L912 BasicCegarLoop]: 64 mSDtfsCounter, 175 mSDsluCounter, 304 mSDsCounter, 0 mSdLazyCounter, 275 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 175 SdHoareTripleChecker+Valid, 368 SdHoareTripleChecker+Invalid, 310 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 275 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-19 04:59:11,223 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [175 Valid, 368 Invalid, 310 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 275 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-19 04:59:11,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 371 states. [2022-03-19 04:59:11,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 371 to 371. [2022-03-19 04:59:11,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 371 states, 285 states have (on average 1.1403508771929824) internal successors, (325), 285 states have internal predecessors, (325), 44 states have call successors, (44), 43 states have call predecessors, (44), 41 states have return successors, (42), 42 states have call predecessors, (42), 42 states have call successors, (42) [2022-03-19 04:59:11,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 371 states to 371 states and 411 transitions. [2022-03-19 04:59:11,253 INFO L78 Accepts]: Start accepts. Automaton has 371 states and 411 transitions. Word has length 365 [2022-03-19 04:59:11,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 04:59:11,253 INFO L478 AbstractCegarLoop]: Abstraction has 371 states and 411 transitions. [2022-03-19 04:59:11,253 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 6.619047619047619) internal successors, (278), 41 states have internal predecessors, (278), 41 states have call successors, (43), 41 states have call predecessors, (43), 39 states have return successors, (41), 39 states have call predecessors, (41), 40 states have call successors, (41) [2022-03-19 04:59:11,253 INFO L276 IsEmpty]: Start isEmpty. Operand 371 states and 411 transitions. [2022-03-19 04:59:11,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 375 [2022-03-19 04:59:11,255 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 04:59:11,255 INFO L500 BasicCegarLoop]: trace histogram [40, 40, 39, 39, 39, 39, 39, 39, 39, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 04:59:11,262 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2022-03-19 04:59:11,455 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 04:59:11,455 INFO L403 AbstractCegarLoop]: === Iteration 43 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 04:59:11,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 04:59:11,456 INFO L85 PathProgramCache]: Analyzing trace with hash -194370340, now seen corresponding path program 77 times [2022-03-19 04:59:11,456 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 04:59:11,456 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1544640159] [2022-03-19 04:59:11,456 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 04:59:11,457 INFO L85 PathProgramCache]: Analyzing trace with hash -194370340, now seen corresponding path program 78 times [2022-03-19 04:59:11,457 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 04:59:11,457 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1344173838] [2022-03-19 04:59:11,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 04:59:11,457 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 04:59:11,474 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 04:59:11,474 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1433137681] [2022-03-19 04:59:11,474 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-19 04:59:11,474 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 04:59:11,474 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 04:59:11,475 INFO L229 MonitoredProcess]: Starting monitored process 44 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 04:59:11,483 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2022-03-19 04:59:15,342 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 40 check-sat command(s) [2022-03-19 04:59:15,343 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 04:59:15,354 INFO L263 TraceCheckSpWp]: Trace formula consists of 873 conjuncts, 83 conjunts are in the unsatisfiable core [2022-03-19 04:59:15,358 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 04:59:16,287 INFO L134 CoverageAnalysis]: Checked inductivity of 6829 backedges. 78 proven. 6747 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-19 04:59:16,287 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 04:59:18,076 INFO L134 CoverageAnalysis]: Checked inductivity of 6829 backedges. 78 proven. 3783 refuted. 0 times theorem prover too weak. 2968 trivial. 0 not checked. [2022-03-19 04:59:18,076 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 04:59:18,077 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1344173838] [2022-03-19 04:59:18,077 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 04:59:18,077 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1433137681] [2022-03-19 04:59:18,077 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1433137681] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 04:59:18,077 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 04:59:18,077 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43] total 84 [2022-03-19 04:59:18,077 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 04:59:18,077 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1544640159] [2022-03-19 04:59:18,077 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1544640159] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 04:59:18,078 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 04:59:18,078 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [43] imperfect sequences [] total 43 [2022-03-19 04:59:18,078 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [720405837] [2022-03-19 04:59:18,078 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 04:59:18,078 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-03-19 04:59:18,078 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 04:59:18,079 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-03-19 04:59:18,079 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3326, Invalid=3646, Unknown=0, NotChecked=0, Total=6972 [2022-03-19 04:59:18,079 INFO L87 Difference]: Start difference. First operand 371 states and 411 transitions. Second operand has 43 states, 43 states have (on average 6.627906976744186) internal successors, (285), 42 states have internal predecessors, (285), 42 states have call successors, (44), 42 states have call predecessors, (44), 40 states have return successors, (42), 40 states have call predecessors, (42), 41 states have call successors, (42) [2022-03-19 04:59:18,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 04:59:18,871 INFO L93 Difference]: Finished difference Result 385 states and 426 transitions. [2022-03-19 04:59:18,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2022-03-19 04:59:18,871 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 6.627906976744186) internal successors, (285), 42 states have internal predecessors, (285), 42 states have call successors, (44), 42 states have call predecessors, (44), 40 states have return successors, (42), 40 states have call predecessors, (42), 41 states have call successors, (42) Word has length 374 [2022-03-19 04:59:18,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 04:59:18,873 INFO L225 Difference]: With dead ends: 385 [2022-03-19 04:59:18,873 INFO L226 Difference]: Without dead ends: 380 [2022-03-19 04:59:18,874 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 786 GetRequests, 665 SyntacticMatches, 0 SemanticMatches, 121 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 859 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=6563, Invalid=8443, Unknown=0, NotChecked=0, Total=15006 [2022-03-19 04:59:18,874 INFO L912 BasicCegarLoop]: 65 mSDtfsCounter, 114 mSDsluCounter, 359 mSDsCounter, 0 mSdLazyCounter, 281 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 424 SdHoareTripleChecker+Invalid, 302 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 281 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-19 04:59:18,875 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [114 Valid, 424 Invalid, 302 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 281 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-19 04:59:18,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 380 states. [2022-03-19 04:59:18,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 380 to 380. [2022-03-19 04:59:18,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 380 states, 292 states have (on average 1.1404109589041096) internal successors, (333), 292 states have internal predecessors, (333), 45 states have call successors, (45), 44 states have call predecessors, (45), 42 states have return successors, (43), 43 states have call predecessors, (43), 43 states have call successors, (43) [2022-03-19 04:59:18,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 380 states to 380 states and 421 transitions. [2022-03-19 04:59:18,905 INFO L78 Accepts]: Start accepts. Automaton has 380 states and 421 transitions. Word has length 374 [2022-03-19 04:59:18,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 04:59:18,905 INFO L478 AbstractCegarLoop]: Abstraction has 380 states and 421 transitions. [2022-03-19 04:59:18,906 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 6.627906976744186) internal successors, (285), 42 states have internal predecessors, (285), 42 states have call successors, (44), 42 states have call predecessors, (44), 40 states have return successors, (42), 40 states have call predecessors, (42), 41 states have call successors, (42) [2022-03-19 04:59:18,906 INFO L276 IsEmpty]: Start isEmpty. Operand 380 states and 421 transitions. [2022-03-19 04:59:18,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 384 [2022-03-19 04:59:18,907 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 04:59:18,907 INFO L500 BasicCegarLoop]: trace histogram [41, 41, 40, 40, 40, 40, 40, 40, 40, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 04:59:18,920 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Ended with exit code 0 [2022-03-19 04:59:19,120 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2022-03-19 04:59:19,120 INFO L403 AbstractCegarLoop]: === Iteration 44 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 04:59:19,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 04:59:19,121 INFO L85 PathProgramCache]: Analyzing trace with hash 949326358, now seen corresponding path program 79 times [2022-03-19 04:59:19,121 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 04:59:19,121 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [803313597] [2022-03-19 04:59:19,122 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 04:59:19,122 INFO L85 PathProgramCache]: Analyzing trace with hash 949326358, now seen corresponding path program 80 times [2022-03-19 04:59:19,122 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 04:59:19,122 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1908891978] [2022-03-19 04:59:19,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 04:59:19,122 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 04:59:19,129 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 04:59:19,130 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [797165886] [2022-03-19 04:59:19,130 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 04:59:19,130 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 04:59:19,130 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 04:59:19,131 INFO L229 MonitoredProcess]: Starting monitored process 45 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 04:59:19,147 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2022-03-19 04:59:19,245 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 04:59:19,245 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 04:59:19,249 INFO L263 TraceCheckSpWp]: Trace formula consists of 893 conjuncts, 85 conjunts are in the unsatisfiable core [2022-03-19 04:59:19,252 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 04:59:20,263 INFO L134 CoverageAnalysis]: Checked inductivity of 7184 backedges. 80 proven. 7100 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-19 04:59:20,263 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 04:59:22,157 INFO L134 CoverageAnalysis]: Checked inductivity of 7184 backedges. 80 proven. 3980 refuted. 0 times theorem prover too weak. 3124 trivial. 0 not checked. [2022-03-19 04:59:22,157 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 04:59:22,157 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1908891978] [2022-03-19 04:59:22,157 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 04:59:22,157 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [797165886] [2022-03-19 04:59:22,157 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [797165886] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 04:59:22,157 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 04:59:22,157 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 44] total 86 [2022-03-19 04:59:22,158 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 04:59:22,158 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [803313597] [2022-03-19 04:59:22,158 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [803313597] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 04:59:22,158 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 04:59:22,158 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [44] imperfect sequences [] total 44 [2022-03-19 04:59:22,158 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1636135793] [2022-03-19 04:59:22,158 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 04:59:22,158 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-03-19 04:59:22,158 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 04:59:22,159 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-03-19 04:59:22,159 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3491, Invalid=3819, Unknown=0, NotChecked=0, Total=7310 [2022-03-19 04:59:22,160 INFO L87 Difference]: Start difference. First operand 380 states and 421 transitions. Second operand has 44 states, 44 states have (on average 6.636363636363637) internal successors, (292), 43 states have internal predecessors, (292), 43 states have call successors, (45), 43 states have call predecessors, (45), 41 states have return successors, (43), 41 states have call predecessors, (43), 42 states have call successors, (43) [2022-03-19 04:59:22,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 04:59:22,991 INFO L93 Difference]: Finished difference Result 394 states and 436 transitions. [2022-03-19 04:59:22,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2022-03-19 04:59:22,992 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 6.636363636363637) internal successors, (292), 43 states have internal predecessors, (292), 43 states have call successors, (45), 43 states have call predecessors, (45), 41 states have return successors, (43), 41 states have call predecessors, (43), 42 states have call successors, (43) Word has length 383 [2022-03-19 04:59:22,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 04:59:22,993 INFO L225 Difference]: With dead ends: 394 [2022-03-19 04:59:22,993 INFO L226 Difference]: Without dead ends: 389 [2022-03-19 04:59:22,994 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 805 GetRequests, 681 SyntacticMatches, 0 SemanticMatches, 124 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 901 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=6891, Invalid=8859, Unknown=0, NotChecked=0, Total=15750 [2022-03-19 04:59:22,995 INFO L912 BasicCegarLoop]: 66 mSDtfsCounter, 140 mSDsluCounter, 342 mSDsCounter, 0 mSdLazyCounter, 301 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 140 SdHoareTripleChecker+Valid, 408 SdHoareTripleChecker+Invalid, 322 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 301 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-19 04:59:22,995 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [140 Valid, 408 Invalid, 322 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 301 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-19 04:59:22,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 389 states. [2022-03-19 04:59:23,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 389 to 389. [2022-03-19 04:59:23,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 389 states, 299 states have (on average 1.140468227424749) internal successors, (341), 299 states have internal predecessors, (341), 46 states have call successors, (46), 45 states have call predecessors, (46), 43 states have return successors, (44), 44 states have call predecessors, (44), 44 states have call successors, (44) [2022-03-19 04:59:23,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 389 states to 389 states and 431 transitions. [2022-03-19 04:59:23,026 INFO L78 Accepts]: Start accepts. Automaton has 389 states and 431 transitions. Word has length 383 [2022-03-19 04:59:23,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 04:59:23,026 INFO L478 AbstractCegarLoop]: Abstraction has 389 states and 431 transitions. [2022-03-19 04:59:23,026 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 6.636363636363637) internal successors, (292), 43 states have internal predecessors, (292), 43 states have call successors, (45), 43 states have call predecessors, (45), 41 states have return successors, (43), 41 states have call predecessors, (43), 42 states have call successors, (43) [2022-03-19 04:59:23,026 INFO L276 IsEmpty]: Start isEmpty. Operand 389 states and 431 transitions. [2022-03-19 04:59:23,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 393 [2022-03-19 04:59:23,028 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 04:59:23,028 INFO L500 BasicCegarLoop]: trace histogram [42, 42, 41, 41, 41, 41, 41, 41, 41, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 04:59:23,045 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Forceful destruction successful, exit code 0 [2022-03-19 04:59:23,243 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,45 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 04:59:23,243 INFO L403 AbstractCegarLoop]: === Iteration 45 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 04:59:23,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 04:59:23,244 INFO L85 PathProgramCache]: Analyzing trace with hash 311977500, now seen corresponding path program 81 times [2022-03-19 04:59:23,244 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 04:59:23,244 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1170494313] [2022-03-19 04:59:23,244 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 04:59:23,244 INFO L85 PathProgramCache]: Analyzing trace with hash 311977500, now seen corresponding path program 82 times [2022-03-19 04:59:23,244 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 04:59:23,244 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1058634892] [2022-03-19 04:59:23,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 04:59:23,245 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 04:59:23,252 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 04:59:23,252 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1745121649] [2022-03-19 04:59:23,252 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 04:59:23,252 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 04:59:23,252 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 04:59:23,253 INFO L229 MonitoredProcess]: Starting monitored process 46 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 04:59:23,254 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2022-03-19 04:59:23,518 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 04:59:23,519 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 04:59:23,523 INFO L263 TraceCheckSpWp]: Trace formula consists of 913 conjuncts, 87 conjunts are in the unsatisfiable core [2022-03-19 04:59:23,526 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 04:59:24,557 INFO L134 CoverageAnalysis]: Checked inductivity of 7548 backedges. 82 proven. 7462 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-19 04:59:24,558 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 04:59:26,527 INFO L134 CoverageAnalysis]: Checked inductivity of 7548 backedges. 82 proven. 4182 refuted. 0 times theorem prover too weak. 3284 trivial. 0 not checked. [2022-03-19 04:59:26,527 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 04:59:26,527 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1058634892] [2022-03-19 04:59:26,527 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 04:59:26,527 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1745121649] [2022-03-19 04:59:26,527 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1745121649] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 04:59:26,527 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 04:59:26,527 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 45] total 88 [2022-03-19 04:59:26,528 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 04:59:26,528 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1170494313] [2022-03-19 04:59:26,528 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1170494313] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 04:59:26,528 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 04:59:26,528 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [45] imperfect sequences [] total 45 [2022-03-19 04:59:26,528 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [3442323] [2022-03-19 04:59:26,528 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 04:59:26,528 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-03-19 04:59:26,528 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 04:59:26,529 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-03-19 04:59:26,529 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3660, Invalid=3996, Unknown=0, NotChecked=0, Total=7656 [2022-03-19 04:59:26,530 INFO L87 Difference]: Start difference. First operand 389 states and 431 transitions. Second operand has 45 states, 45 states have (on average 6.644444444444445) internal successors, (299), 44 states have internal predecessors, (299), 44 states have call successors, (46), 44 states have call predecessors, (46), 42 states have return successors, (44), 42 states have call predecessors, (44), 43 states have call successors, (44) [2022-03-19 04:59:27,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 04:59:27,431 INFO L93 Difference]: Finished difference Result 403 states and 446 transitions. [2022-03-19 04:59:27,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2022-03-19 04:59:27,432 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 6.644444444444445) internal successors, (299), 44 states have internal predecessors, (299), 44 states have call successors, (46), 44 states have call predecessors, (46), 42 states have return successors, (44), 42 states have call predecessors, (44), 43 states have call successors, (44) Word has length 392 [2022-03-19 04:59:27,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 04:59:27,433 INFO L225 Difference]: With dead ends: 403 [2022-03-19 04:59:27,433 INFO L226 Difference]: Without dead ends: 398 [2022-03-19 04:59:27,435 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 824 GetRequests, 697 SyntacticMatches, 0 SemanticMatches, 127 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 944 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=7227, Invalid=9285, Unknown=0, NotChecked=0, Total=16512 [2022-03-19 04:59:27,435 INFO L912 BasicCegarLoop]: 67 mSDtfsCounter, 185 mSDsluCounter, 337 mSDsCounter, 0 mSdLazyCounter, 241 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 185 SdHoareTripleChecker+Valid, 404 SdHoareTripleChecker+Invalid, 283 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 241 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-19 04:59:27,435 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [185 Valid, 404 Invalid, 283 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 241 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-19 04:59:27,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 398 states. [2022-03-19 04:59:27,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 398 to 398. [2022-03-19 04:59:27,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 398 states, 306 states have (on average 1.1405228758169934) internal successors, (349), 306 states have internal predecessors, (349), 47 states have call successors, (47), 46 states have call predecessors, (47), 44 states have return successors, (45), 45 states have call predecessors, (45), 45 states have call successors, (45) [2022-03-19 04:59:27,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 398 states to 398 states and 441 transitions. [2022-03-19 04:59:27,468 INFO L78 Accepts]: Start accepts. Automaton has 398 states and 441 transitions. Word has length 392 [2022-03-19 04:59:27,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 04:59:27,468 INFO L478 AbstractCegarLoop]: Abstraction has 398 states and 441 transitions. [2022-03-19 04:59:27,469 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 6.644444444444445) internal successors, (299), 44 states have internal predecessors, (299), 44 states have call successors, (46), 44 states have call predecessors, (46), 42 states have return successors, (44), 42 states have call predecessors, (44), 43 states have call successors, (44) [2022-03-19 04:59:27,469 INFO L276 IsEmpty]: Start isEmpty. Operand 398 states and 441 transitions. [2022-03-19 04:59:27,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 402 [2022-03-19 04:59:27,470 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 04:59:27,470 INFO L500 BasicCegarLoop]: trace histogram [43, 43, 42, 42, 42, 42, 42, 42, 42, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 04:59:27,481 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Forceful destruction successful, exit code 0 [2022-03-19 04:59:27,677 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2022-03-19 04:59:27,677 INFO L403 AbstractCegarLoop]: === Iteration 46 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 04:59:27,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 04:59:27,677 INFO L85 PathProgramCache]: Analyzing trace with hash -432228138, now seen corresponding path program 83 times [2022-03-19 04:59:27,677 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 04:59:27,678 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [974373863] [2022-03-19 04:59:27,678 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 04:59:27,678 INFO L85 PathProgramCache]: Analyzing trace with hash -432228138, now seen corresponding path program 84 times [2022-03-19 04:59:27,678 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 04:59:27,678 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1230328504] [2022-03-19 04:59:27,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 04:59:27,678 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 04:59:27,695 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 04:59:27,695 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [157282263] [2022-03-19 04:59:27,695 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-19 04:59:27,695 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 04:59:27,695 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 04:59:27,696 INFO L229 MonitoredProcess]: Starting monitored process 47 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 04:59:27,702 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2022-03-19 04:59:34,975 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 43 check-sat command(s) [2022-03-19 04:59:34,975 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 04:59:34,995 INFO L263 TraceCheckSpWp]: Trace formula consists of 933 conjuncts, 89 conjunts are in the unsatisfiable core [2022-03-19 04:59:34,998 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 04:59:36,058 INFO L134 CoverageAnalysis]: Checked inductivity of 7921 backedges. 84 proven. 7833 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-19 04:59:36,058 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 04:59:38,143 INFO L134 CoverageAnalysis]: Checked inductivity of 7921 backedges. 84 proven. 4389 refuted. 0 times theorem prover too weak. 3448 trivial. 0 not checked. [2022-03-19 04:59:38,143 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 04:59:38,143 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1230328504] [2022-03-19 04:59:38,143 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 04:59:38,143 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [157282263] [2022-03-19 04:59:38,144 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [157282263] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 04:59:38,144 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 04:59:38,144 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 46] total 90 [2022-03-19 04:59:38,144 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 04:59:38,144 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [974373863] [2022-03-19 04:59:38,144 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [974373863] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 04:59:38,144 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 04:59:38,144 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [46] imperfect sequences [] total 46 [2022-03-19 04:59:38,144 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1850891283] [2022-03-19 04:59:38,144 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 04:59:38,145 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-03-19 04:59:38,145 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 04:59:38,145 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-03-19 04:59:38,146 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3833, Invalid=4177, Unknown=0, NotChecked=0, Total=8010 [2022-03-19 04:59:38,146 INFO L87 Difference]: Start difference. First operand 398 states and 441 transitions. Second operand has 46 states, 46 states have (on average 6.6521739130434785) internal successors, (306), 45 states have internal predecessors, (306), 45 states have call successors, (47), 45 states have call predecessors, (47), 43 states have return successors, (45), 43 states have call predecessors, (45), 44 states have call successors, (45) [2022-03-19 04:59:39,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 04:59:39,038 INFO L93 Difference]: Finished difference Result 412 states and 456 transitions. [2022-03-19 04:59:39,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2022-03-19 04:59:39,039 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 6.6521739130434785) internal successors, (306), 45 states have internal predecessors, (306), 45 states have call successors, (47), 45 states have call predecessors, (47), 43 states have return successors, (45), 43 states have call predecessors, (45), 44 states have call successors, (45) Word has length 401 [2022-03-19 04:59:39,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 04:59:39,041 INFO L225 Difference]: With dead ends: 412 [2022-03-19 04:59:39,041 INFO L226 Difference]: Without dead ends: 407 [2022-03-19 04:59:39,042 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 843 GetRequests, 713 SyntacticMatches, 0 SemanticMatches, 130 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 988 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=7571, Invalid=9721, Unknown=0, NotChecked=0, Total=17292 [2022-03-19 04:59:39,043 INFO L912 BasicCegarLoop]: 68 mSDtfsCounter, 183 mSDsluCounter, 350 mSDsCounter, 0 mSdLazyCounter, 259 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 183 SdHoareTripleChecker+Valid, 418 SdHoareTripleChecker+Invalid, 308 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 259 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-19 04:59:39,043 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [183 Valid, 418 Invalid, 308 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 259 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-19 04:59:39,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 407 states. [2022-03-19 04:59:39,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 407 to 407. [2022-03-19 04:59:39,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 407 states, 313 states have (on average 1.1405750798722045) internal successors, (357), 313 states have internal predecessors, (357), 48 states have call successors, (48), 47 states have call predecessors, (48), 45 states have return successors, (46), 46 states have call predecessors, (46), 46 states have call successors, (46) [2022-03-19 04:59:39,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 407 states to 407 states and 451 transitions. [2022-03-19 04:59:39,091 INFO L78 Accepts]: Start accepts. Automaton has 407 states and 451 transitions. Word has length 401 [2022-03-19 04:59:39,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 04:59:39,091 INFO L478 AbstractCegarLoop]: Abstraction has 407 states and 451 transitions. [2022-03-19 04:59:39,091 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 6.6521739130434785) internal successors, (306), 45 states have internal predecessors, (306), 45 states have call successors, (47), 45 states have call predecessors, (47), 43 states have return successors, (45), 43 states have call predecessors, (45), 44 states have call successors, (45) [2022-03-19 04:59:39,091 INFO L276 IsEmpty]: Start isEmpty. Operand 407 states and 451 transitions. [2022-03-19 04:59:39,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 411 [2022-03-19 04:59:39,093 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 04:59:39,093 INFO L500 BasicCegarLoop]: trace histogram [44, 44, 43, 43, 43, 43, 43, 43, 43, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 04:59:39,101 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Forceful destruction successful, exit code 0 [2022-03-19 04:59:39,301 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45,47 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 04:59:39,301 INFO L403 AbstractCegarLoop]: === Iteration 47 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 04:59:39,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 04:59:39,301 INFO L85 PathProgramCache]: Analyzing trace with hash -290400420, now seen corresponding path program 85 times [2022-03-19 04:59:39,301 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 04:59:39,301 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [814799773] [2022-03-19 04:59:39,302 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 04:59:39,302 INFO L85 PathProgramCache]: Analyzing trace with hash -290400420, now seen corresponding path program 86 times [2022-03-19 04:59:39,302 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 04:59:39,302 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [95379119] [2022-03-19 04:59:39,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 04:59:39,302 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 04:59:39,310 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 04:59:39,310 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1305582723] [2022-03-19 04:59:39,310 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 04:59:39,310 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 04:59:39,310 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 04:59:39,311 INFO L229 MonitoredProcess]: Starting monitored process 48 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 04:59:39,312 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2022-03-19 04:59:39,422 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 04:59:39,422 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 04:59:39,426 INFO L263 TraceCheckSpWp]: Trace formula consists of 953 conjuncts, 91 conjunts are in the unsatisfiable core [2022-03-19 04:59:39,430 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 04:59:40,558 INFO L134 CoverageAnalysis]: Checked inductivity of 8303 backedges. 86 proven. 8213 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-19 04:59:40,558 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 04:59:42,647 INFO L134 CoverageAnalysis]: Checked inductivity of 8303 backedges. 86 proven. 4601 refuted. 0 times theorem prover too weak. 3616 trivial. 0 not checked. [2022-03-19 04:59:42,647 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 04:59:42,647 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [95379119] [2022-03-19 04:59:42,647 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 04:59:42,647 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1305582723] [2022-03-19 04:59:42,647 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1305582723] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 04:59:42,647 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 04:59:42,647 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47] total 92 [2022-03-19 04:59:42,648 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 04:59:42,648 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [814799773] [2022-03-19 04:59:42,648 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [814799773] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 04:59:42,648 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 04:59:42,648 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [47] imperfect sequences [] total 47 [2022-03-19 04:59:42,648 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1690394969] [2022-03-19 04:59:42,648 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 04:59:42,648 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-03-19 04:59:42,648 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 04:59:42,649 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-03-19 04:59:42,649 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4010, Invalid=4362, Unknown=0, NotChecked=0, Total=8372 [2022-03-19 04:59:42,649 INFO L87 Difference]: Start difference. First operand 407 states and 451 transitions. Second operand has 47 states, 47 states have (on average 6.659574468085107) internal successors, (313), 46 states have internal predecessors, (313), 46 states have call successors, (48), 46 states have call predecessors, (48), 44 states have return successors, (46), 44 states have call predecessors, (46), 45 states have call successors, (46) [2022-03-19 04:59:43,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 04:59:43,573 INFO L93 Difference]: Finished difference Result 421 states and 466 transitions. [2022-03-19 04:59:43,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2022-03-19 04:59:43,574 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 6.659574468085107) internal successors, (313), 46 states have internal predecessors, (313), 46 states have call successors, (48), 46 states have call predecessors, (48), 44 states have return successors, (46), 44 states have call predecessors, (46), 45 states have call successors, (46) Word has length 410 [2022-03-19 04:59:43,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 04:59:43,575 INFO L225 Difference]: With dead ends: 421 [2022-03-19 04:59:43,575 INFO L226 Difference]: Without dead ends: 416 [2022-03-19 04:59:43,576 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 862 GetRequests, 729 SyntacticMatches, 0 SemanticMatches, 133 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1033 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=7923, Invalid=10167, Unknown=0, NotChecked=0, Total=18090 [2022-03-19 04:59:43,576 INFO L912 BasicCegarLoop]: 69 mSDtfsCounter, 149 mSDsluCounter, 363 mSDsCounter, 0 mSdLazyCounter, 321 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 149 SdHoareTripleChecker+Valid, 432 SdHoareTripleChecker+Invalid, 335 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 321 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-19 04:59:43,576 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [149 Valid, 432 Invalid, 335 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 321 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-19 04:59:43,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 416 states. [2022-03-19 04:59:43,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 416 to 416. [2022-03-19 04:59:43,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 416 states, 320 states have (on average 1.140625) internal successors, (365), 320 states have internal predecessors, (365), 49 states have call successors, (49), 48 states have call predecessors, (49), 46 states have return successors, (47), 47 states have call predecessors, (47), 47 states have call successors, (47) [2022-03-19 04:59:43,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 416 states to 416 states and 461 transitions. [2022-03-19 04:59:43,610 INFO L78 Accepts]: Start accepts. Automaton has 416 states and 461 transitions. Word has length 410 [2022-03-19 04:59:43,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 04:59:43,610 INFO L478 AbstractCegarLoop]: Abstraction has 416 states and 461 transitions. [2022-03-19 04:59:43,610 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 6.659574468085107) internal successors, (313), 46 states have internal predecessors, (313), 46 states have call successors, (48), 46 states have call predecessors, (48), 44 states have return successors, (46), 44 states have call predecessors, (46), 45 states have call successors, (46) [2022-03-19 04:59:43,610 INFO L276 IsEmpty]: Start isEmpty. Operand 416 states and 461 transitions. [2022-03-19 04:59:43,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 420 [2022-03-19 04:59:43,612 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 04:59:43,612 INFO L500 BasicCegarLoop]: trace histogram [45, 45, 44, 44, 44, 44, 44, 44, 44, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 04:59:43,632 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Forceful destruction successful, exit code 0 [2022-03-19 04:59:43,822 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46,48 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 04:59:43,822 INFO L403 AbstractCegarLoop]: === Iteration 48 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 04:59:43,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 04:59:43,823 INFO L85 PathProgramCache]: Analyzing trace with hash -1569738858, now seen corresponding path program 87 times [2022-03-19 04:59:43,823 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 04:59:43,823 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1579650371] [2022-03-19 04:59:43,823 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 04:59:43,823 INFO L85 PathProgramCache]: Analyzing trace with hash -1569738858, now seen corresponding path program 88 times [2022-03-19 04:59:43,823 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 04:59:43,823 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1200156903] [2022-03-19 04:59:43,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 04:59:43,824 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 04:59:43,831 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 04:59:43,831 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1087705699] [2022-03-19 04:59:43,831 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 04:59:43,832 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 04:59:43,832 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 04:59:43,833 INFO L229 MonitoredProcess]: Starting monitored process 49 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 04:59:43,833 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2022-03-19 04:59:44,138 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 04:59:44,138 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 04:59:44,142 INFO L263 TraceCheckSpWp]: Trace formula consists of 973 conjuncts, 93 conjunts are in the unsatisfiable core [2022-03-19 04:59:44,145 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 04:59:45,255 INFO L134 CoverageAnalysis]: Checked inductivity of 8694 backedges. 88 proven. 8602 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-19 04:59:45,255 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 04:59:47,479 INFO L134 CoverageAnalysis]: Checked inductivity of 8694 backedges. 88 proven. 4818 refuted. 0 times theorem prover too weak. 3788 trivial. 0 not checked. [2022-03-19 04:59:47,479 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 04:59:47,479 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1200156903] [2022-03-19 04:59:47,479 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 04:59:47,479 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1087705699] [2022-03-19 04:59:47,479 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1087705699] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 04:59:47,479 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 04:59:47,480 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 48] total 94 [2022-03-19 04:59:47,480 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 04:59:47,480 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1579650371] [2022-03-19 04:59:47,480 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1579650371] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 04:59:47,480 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 04:59:47,480 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [48] imperfect sequences [] total 48 [2022-03-19 04:59:47,480 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1896429860] [2022-03-19 04:59:47,480 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 04:59:47,480 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2022-03-19 04:59:47,480 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 04:59:47,481 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2022-03-19 04:59:47,481 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4191, Invalid=4551, Unknown=0, NotChecked=0, Total=8742 [2022-03-19 04:59:47,482 INFO L87 Difference]: Start difference. First operand 416 states and 461 transitions. Second operand has 48 states, 48 states have (on average 6.666666666666667) internal successors, (320), 47 states have internal predecessors, (320), 47 states have call successors, (49), 47 states have call predecessors, (49), 45 states have return successors, (47), 45 states have call predecessors, (47), 46 states have call successors, (47) [2022-03-19 04:59:48,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 04:59:48,436 INFO L93 Difference]: Finished difference Result 430 states and 476 transitions. [2022-03-19 04:59:48,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2022-03-19 04:59:48,437 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 6.666666666666667) internal successors, (320), 47 states have internal predecessors, (320), 47 states have call successors, (49), 47 states have call predecessors, (49), 45 states have return successors, (47), 45 states have call predecessors, (47), 46 states have call successors, (47) Word has length 419 [2022-03-19 04:59:48,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 04:59:48,438 INFO L225 Difference]: With dead ends: 430 [2022-03-19 04:59:48,438 INFO L226 Difference]: Without dead ends: 425 [2022-03-19 04:59:48,440 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 881 GetRequests, 745 SyntacticMatches, 0 SemanticMatches, 136 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1079 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=8283, Invalid=10623, Unknown=0, NotChecked=0, Total=18906 [2022-03-19 04:59:48,440 INFO L912 BasicCegarLoop]: 70 mSDtfsCounter, 226 mSDsluCounter, 352 mSDsCounter, 0 mSdLazyCounter, 273 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 226 SdHoareTripleChecker+Valid, 422 SdHoareTripleChecker+Invalid, 336 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 273 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-19 04:59:48,440 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [226 Valid, 422 Invalid, 336 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 273 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-19 04:59:48,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 425 states. [2022-03-19 04:59:48,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 425 to 425. [2022-03-19 04:59:48,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 425 states, 327 states have (on average 1.1406727828746177) internal successors, (373), 327 states have internal predecessors, (373), 50 states have call successors, (50), 49 states have call predecessors, (50), 47 states have return successors, (48), 48 states have call predecessors, (48), 48 states have call successors, (48) [2022-03-19 04:59:48,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 425 states to 425 states and 471 transitions. [2022-03-19 04:59:48,474 INFO L78 Accepts]: Start accepts. Automaton has 425 states and 471 transitions. Word has length 419 [2022-03-19 04:59:48,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 04:59:48,474 INFO L478 AbstractCegarLoop]: Abstraction has 425 states and 471 transitions. [2022-03-19 04:59:48,474 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 6.666666666666667) internal successors, (320), 47 states have internal predecessors, (320), 47 states have call successors, (49), 47 states have call predecessors, (49), 45 states have return successors, (47), 45 states have call predecessors, (47), 46 states have call successors, (47) [2022-03-19 04:59:48,475 INFO L276 IsEmpty]: Start isEmpty. Operand 425 states and 471 transitions. [2022-03-19 04:59:48,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 429 [2022-03-19 04:59:48,476 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 04:59:48,476 INFO L500 BasicCegarLoop]: trace histogram [46, 46, 45, 45, 45, 45, 45, 45, 45, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 04:59:48,482 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Ended with exit code 0 [2022-03-19 04:59:48,682 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2022-03-19 04:59:48,682 INFO L403 AbstractCegarLoop]: === Iteration 49 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 04:59:48,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 04:59:48,683 INFO L85 PathProgramCache]: Analyzing trace with hash -1803061092, now seen corresponding path program 89 times [2022-03-19 04:59:48,683 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 04:59:48,683 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [495397717] [2022-03-19 04:59:48,683 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 04:59:48,683 INFO L85 PathProgramCache]: Analyzing trace with hash -1803061092, now seen corresponding path program 90 times [2022-03-19 04:59:48,683 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 04:59:48,683 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [368577801] [2022-03-19 04:59:48,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 04:59:48,684 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 04:59:48,692 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 04:59:48,693 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1473532701] [2022-03-19 04:59:48,693 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-19 04:59:48,693 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 04:59:48,693 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 04:59:48,703 INFO L229 MonitoredProcess]: Starting monitored process 50 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 04:59:48,704 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2022-03-19 05:00:58,806 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 46 check-sat command(s) [2022-03-19 05:00:58,806 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 05:00:58,848 INFO L263 TraceCheckSpWp]: Trace formula consists of 993 conjuncts, 95 conjunts are in the unsatisfiable core [2022-03-19 05:00:58,852 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 05:00:59,984 INFO L134 CoverageAnalysis]: Checked inductivity of 9094 backedges. 90 proven. 9000 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-19 05:00:59,984 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 05:01:02,265 INFO L134 CoverageAnalysis]: Checked inductivity of 9094 backedges. 90 proven. 5040 refuted. 0 times theorem prover too weak. 3964 trivial. 0 not checked. [2022-03-19 05:01:02,266 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 05:01:02,266 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [368577801] [2022-03-19 05:01:02,266 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 05:01:02,266 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1473532701] [2022-03-19 05:01:02,266 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1473532701] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 05:01:02,266 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 05:01:02,266 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49] total 96 [2022-03-19 05:01:02,266 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 05:01:02,266 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [495397717] [2022-03-19 05:01:02,266 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [495397717] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 05:01:02,266 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 05:01:02,266 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [49] imperfect sequences [] total 49 [2022-03-19 05:01:02,267 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1772571934] [2022-03-19 05:01:02,267 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 05:01:02,267 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-03-19 05:01:02,267 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 05:01:02,267 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-03-19 05:01:02,268 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4376, Invalid=4744, Unknown=0, NotChecked=0, Total=9120 [2022-03-19 05:01:02,268 INFO L87 Difference]: Start difference. First operand 425 states and 471 transitions. Second operand has 49 states, 49 states have (on average 6.673469387755102) internal successors, (327), 48 states have internal predecessors, (327), 48 states have call successors, (50), 48 states have call predecessors, (50), 46 states have return successors, (48), 46 states have call predecessors, (48), 47 states have call successors, (48) [2022-03-19 05:01:03,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 05:01:03,289 INFO L93 Difference]: Finished difference Result 439 states and 486 transitions. [2022-03-19 05:01:03,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2022-03-19 05:01:03,290 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 6.673469387755102) internal successors, (327), 48 states have internal predecessors, (327), 48 states have call successors, (50), 48 states have call predecessors, (50), 46 states have return successors, (48), 46 states have call predecessors, (48), 47 states have call successors, (48) Word has length 428 [2022-03-19 05:01:03,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 05:01:03,291 INFO L225 Difference]: With dead ends: 439 [2022-03-19 05:01:03,291 INFO L226 Difference]: Without dead ends: 434 [2022-03-19 05:01:03,292 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 900 GetRequests, 761 SyntacticMatches, 0 SemanticMatches, 139 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1126 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=8651, Invalid=11089, Unknown=0, NotChecked=0, Total=19740 [2022-03-19 05:01:03,292 INFO L912 BasicCegarLoop]: 71 mSDtfsCounter, 244 mSDsluCounter, 377 mSDsCounter, 0 mSdLazyCounter, 270 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 244 SdHoareTripleChecker+Valid, 448 SdHoareTripleChecker+Invalid, 319 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 270 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-19 05:01:03,292 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [244 Valid, 448 Invalid, 319 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 270 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-19 05:01:03,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 434 states. [2022-03-19 05:01:03,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 434 to 434. [2022-03-19 05:01:03,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 434 states, 334 states have (on average 1.1407185628742516) internal successors, (381), 334 states have internal predecessors, (381), 51 states have call successors, (51), 50 states have call predecessors, (51), 48 states have return successors, (49), 49 states have call predecessors, (49), 49 states have call successors, (49) [2022-03-19 05:01:03,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 434 states to 434 states and 481 transitions. [2022-03-19 05:01:03,328 INFO L78 Accepts]: Start accepts. Automaton has 434 states and 481 transitions. Word has length 428 [2022-03-19 05:01:03,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 05:01:03,328 INFO L478 AbstractCegarLoop]: Abstraction has 434 states and 481 transitions. [2022-03-19 05:01:03,328 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 6.673469387755102) internal successors, (327), 48 states have internal predecessors, (327), 48 states have call successors, (50), 48 states have call predecessors, (50), 46 states have return successors, (48), 46 states have call predecessors, (48), 47 states have call successors, (48) [2022-03-19 05:01:03,328 INFO L276 IsEmpty]: Start isEmpty. Operand 434 states and 481 transitions. [2022-03-19 05:01:03,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 438 [2022-03-19 05:01:03,330 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 05:01:03,330 INFO L500 BasicCegarLoop]: trace histogram [47, 47, 46, 46, 46, 46, 46, 46, 46, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 05:01:03,354 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Forceful destruction successful, exit code 0 [2022-03-19 05:01:03,543 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2022-03-19 05:01:03,543 INFO L403 AbstractCegarLoop]: === Iteration 50 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 05:01:03,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 05:01:03,544 INFO L85 PathProgramCache]: Analyzing trace with hash 1876588118, now seen corresponding path program 91 times [2022-03-19 05:01:03,544 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 05:01:03,544 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1860674111] [2022-03-19 05:01:03,544 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 05:01:03,544 INFO L85 PathProgramCache]: Analyzing trace with hash 1876588118, now seen corresponding path program 92 times [2022-03-19 05:01:03,544 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 05:01:03,544 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1207251884] [2022-03-19 05:01:03,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 05:01:03,545 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 05:01:03,553 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 05:01:03,553 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [600282728] [2022-03-19 05:01:03,553 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 05:01:03,553 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 05:01:03,553 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 05:01:03,554 INFO L229 MonitoredProcess]: Starting monitored process 51 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 05:01:03,555 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2022-03-19 05:01:03,681 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 05:01:03,681 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 05:01:03,686 INFO L263 TraceCheckSpWp]: Trace formula consists of 1013 conjuncts, 97 conjunts are in the unsatisfiable core [2022-03-19 05:01:03,690 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 05:01:04,899 INFO L134 CoverageAnalysis]: Checked inductivity of 9503 backedges. 92 proven. 9407 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-19 05:01:04,900 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 05:01:07,297 INFO L134 CoverageAnalysis]: Checked inductivity of 9503 backedges. 92 proven. 5267 refuted. 0 times theorem prover too weak. 4144 trivial. 0 not checked. [2022-03-19 05:01:07,297 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 05:01:07,297 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1207251884] [2022-03-19 05:01:07,298 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 05:01:07,298 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [600282728] [2022-03-19 05:01:07,298 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [600282728] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 05:01:07,298 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 05:01:07,298 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 50] total 98 [2022-03-19 05:01:07,298 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 05:01:07,298 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1860674111] [2022-03-19 05:01:07,298 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1860674111] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 05:01:07,298 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 05:01:07,298 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [50] imperfect sequences [] total 50 [2022-03-19 05:01:07,298 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [506784079] [2022-03-19 05:01:07,298 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 05:01:07,299 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2022-03-19 05:01:07,299 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 05:01:07,299 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2022-03-19 05:01:07,300 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4565, Invalid=4941, Unknown=0, NotChecked=0, Total=9506 [2022-03-19 05:01:07,300 INFO L87 Difference]: Start difference. First operand 434 states and 481 transitions. Second operand has 50 states, 50 states have (on average 6.68) internal successors, (334), 49 states have internal predecessors, (334), 49 states have call successors, (51), 49 states have call predecessors, (51), 47 states have return successors, (49), 47 states have call predecessors, (49), 48 states have call successors, (49) [2022-03-19 05:01:08,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 05:01:08,445 INFO L93 Difference]: Finished difference Result 448 states and 496 transitions. [2022-03-19 05:01:08,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2022-03-19 05:01:08,446 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 6.68) internal successors, (334), 49 states have internal predecessors, (334), 49 states have call successors, (51), 49 states have call predecessors, (51), 47 states have return successors, (49), 47 states have call predecessors, (49), 48 states have call successors, (49) Word has length 437 [2022-03-19 05:01:08,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 05:01:08,447 INFO L225 Difference]: With dead ends: 448 [2022-03-19 05:01:08,448 INFO L226 Difference]: Without dead ends: 443 [2022-03-19 05:01:08,449 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 919 GetRequests, 777 SyntacticMatches, 0 SemanticMatches, 142 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1174 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=9027, Invalid=11565, Unknown=0, NotChecked=0, Total=20592 [2022-03-19 05:01:08,449 INFO L912 BasicCegarLoop]: 72 mSDtfsCounter, 161 mSDsluCounter, 390 mSDsCounter, 0 mSdLazyCounter, 313 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 161 SdHoareTripleChecker+Valid, 462 SdHoareTripleChecker+Invalid, 327 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 313 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-19 05:01:08,450 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [161 Valid, 462 Invalid, 327 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 313 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-19 05:01:08,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 443 states. [2022-03-19 05:01:08,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 443 to 443. [2022-03-19 05:01:08,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 443 states, 341 states have (on average 1.1407624633431086) internal successors, (389), 341 states have internal predecessors, (389), 52 states have call successors, (52), 51 states have call predecessors, (52), 49 states have return successors, (50), 50 states have call predecessors, (50), 50 states have call successors, (50) [2022-03-19 05:01:08,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 443 states to 443 states and 491 transitions. [2022-03-19 05:01:08,507 INFO L78 Accepts]: Start accepts. Automaton has 443 states and 491 transitions. Word has length 437 [2022-03-19 05:01:08,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 05:01:08,508 INFO L478 AbstractCegarLoop]: Abstraction has 443 states and 491 transitions. [2022-03-19 05:01:08,508 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 6.68) internal successors, (334), 49 states have internal predecessors, (334), 49 states have call successors, (51), 49 states have call predecessors, (51), 47 states have return successors, (49), 47 states have call predecessors, (49), 48 states have call successors, (49) [2022-03-19 05:01:08,508 INFO L276 IsEmpty]: Start isEmpty. Operand 443 states and 491 transitions. [2022-03-19 05:01:08,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 447 [2022-03-19 05:01:08,510 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 05:01:08,510 INFO L500 BasicCegarLoop]: trace histogram [48, 48, 47, 47, 47, 47, 47, 47, 47, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 05:01:08,529 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Forceful destruction successful, exit code 0 [2022-03-19 05:01:08,715 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2022-03-19 05:01:08,715 INFO L403 AbstractCegarLoop]: === Iteration 51 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 05:01:08,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 05:01:08,716 INFO L85 PathProgramCache]: Analyzing trace with hash 1123043804, now seen corresponding path program 93 times [2022-03-19 05:01:08,716 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 05:01:08,716 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1162814402] [2022-03-19 05:01:08,716 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 05:01:08,716 INFO L85 PathProgramCache]: Analyzing trace with hash 1123043804, now seen corresponding path program 94 times [2022-03-19 05:01:08,716 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 05:01:08,717 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [656807032] [2022-03-19 05:01:08,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 05:01:08,717 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 05:01:08,725 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 05:01:08,725 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [77133421] [2022-03-19 05:01:08,725 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 05:01:08,725 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 05:01:08,725 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 05:01:08,726 INFO L229 MonitoredProcess]: Starting monitored process 52 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 05:01:08,727 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2022-03-19 05:01:08,905 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 05:01:08,905 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 05:01:08,910 INFO L263 TraceCheckSpWp]: Trace formula consists of 1033 conjuncts, 99 conjunts are in the unsatisfiable core [2022-03-19 05:01:08,914 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 05:01:10,164 INFO L134 CoverageAnalysis]: Checked inductivity of 9921 backedges. 94 proven. 9823 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-19 05:01:10,164 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 05:01:12,623 INFO L134 CoverageAnalysis]: Checked inductivity of 9921 backedges. 94 proven. 5499 refuted. 0 times theorem prover too weak. 4328 trivial. 0 not checked. [2022-03-19 05:01:12,623 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 05:01:12,623 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [656807032] [2022-03-19 05:01:12,623 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 05:01:12,623 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [77133421] [2022-03-19 05:01:12,624 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [77133421] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 05:01:12,624 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 05:01:12,624 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 51] total 100 [2022-03-19 05:01:12,624 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 05:01:12,624 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1162814402] [2022-03-19 05:01:12,624 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1162814402] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 05:01:12,624 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 05:01:12,624 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [51] imperfect sequences [] total 51 [2022-03-19 05:01:12,624 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [550074756] [2022-03-19 05:01:12,624 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 05:01:12,625 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2022-03-19 05:01:12,625 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 05:01:12,625 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2022-03-19 05:01:12,626 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4758, Invalid=5142, Unknown=0, NotChecked=0, Total=9900 [2022-03-19 05:01:12,626 INFO L87 Difference]: Start difference. First operand 443 states and 491 transitions. Second operand has 51 states, 51 states have (on average 6.686274509803922) internal successors, (341), 50 states have internal predecessors, (341), 50 states have call successors, (52), 50 states have call predecessors, (52), 48 states have return successors, (50), 48 states have call predecessors, (50), 49 states have call successors, (50) [2022-03-19 05:01:13,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 05:01:13,752 INFO L93 Difference]: Finished difference Result 457 states and 506 transitions. [2022-03-19 05:01:13,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2022-03-19 05:01:13,754 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 6.686274509803922) internal successors, (341), 50 states have internal predecessors, (341), 50 states have call successors, (52), 50 states have call predecessors, (52), 48 states have return successors, (50), 48 states have call predecessors, (50), 49 states have call successors, (50) Word has length 446 [2022-03-19 05:01:13,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 05:01:13,756 INFO L225 Difference]: With dead ends: 457 [2022-03-19 05:01:13,756 INFO L226 Difference]: Without dead ends: 452 [2022-03-19 05:01:13,758 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 938 GetRequests, 793 SyntacticMatches, 0 SemanticMatches, 145 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1223 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=9411, Invalid=12051, Unknown=0, NotChecked=0, Total=21462 [2022-03-19 05:01:13,758 INFO L912 BasicCegarLoop]: 73 mSDtfsCounter, 164 mSDsluCounter, 409 mSDsCounter, 0 mSdLazyCounter, 323 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 164 SdHoareTripleChecker+Valid, 482 SdHoareTripleChecker+Invalid, 344 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 323 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-19 05:01:13,758 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [164 Valid, 482 Invalid, 344 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 323 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-19 05:01:13,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 452 states. [2022-03-19 05:01:13,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 452 to 452. [2022-03-19 05:01:13,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 452 states, 348 states have (on average 1.1408045977011494) internal successors, (397), 348 states have internal predecessors, (397), 53 states have call successors, (53), 52 states have call predecessors, (53), 50 states have return successors, (51), 51 states have call predecessors, (51), 51 states have call successors, (51) [2022-03-19 05:01:13,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 452 states to 452 states and 501 transitions. [2022-03-19 05:01:13,802 INFO L78 Accepts]: Start accepts. Automaton has 452 states and 501 transitions. Word has length 446 [2022-03-19 05:01:13,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 05:01:13,803 INFO L478 AbstractCegarLoop]: Abstraction has 452 states and 501 transitions. [2022-03-19 05:01:13,803 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 6.686274509803922) internal successors, (341), 50 states have internal predecessors, (341), 50 states have call successors, (52), 50 states have call predecessors, (52), 48 states have return successors, (50), 48 states have call predecessors, (50), 49 states have call successors, (50) [2022-03-19 05:01:13,803 INFO L276 IsEmpty]: Start isEmpty. Operand 452 states and 501 transitions. [2022-03-19 05:01:13,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 456 [2022-03-19 05:01:13,805 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 05:01:13,806 INFO L500 BasicCegarLoop]: trace histogram [49, 49, 48, 48, 48, 48, 48, 48, 48, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 05:01:13,815 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Forceful destruction successful, exit code 0 [2022-03-19 05:01:14,011 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,52 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 05:01:14,012 INFO L403 AbstractCegarLoop]: === Iteration 52 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 05:01:14,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 05:01:14,012 INFO L85 PathProgramCache]: Analyzing trace with hash 2116619542, now seen corresponding path program 95 times [2022-03-19 05:01:14,012 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 05:01:14,012 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1248209819] [2022-03-19 05:01:14,013 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 05:01:14,013 INFO L85 PathProgramCache]: Analyzing trace with hash 2116619542, now seen corresponding path program 96 times [2022-03-19 05:01:14,013 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 05:01:14,013 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1444346166] [2022-03-19 05:01:14,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 05:01:14,013 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 05:01:14,025 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 05:01:14,025 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [728354758] [2022-03-19 05:01:14,025 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-19 05:01:14,025 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 05:01:14,025 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 05:01:14,027 INFO L229 MonitoredProcess]: Starting monitored process 53 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 05:01:14,028 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process