/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/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/array-programs/partial_mod_count_limited_3.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-d966a43 [2022-01-30 22:55:28,620 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-30 22:55:28,622 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-30 22:55:28,641 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-01-30 22:55:28,648 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-01-30 22:55:28,649 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-01-30 22:55:28,649 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-01-30 22:55:28,650 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-01-30 22:55:28,651 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-01-30 22:55:28,651 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-01-30 22:55:28,652 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-01-30 22:55:28,654 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-01-30 22:55:28,655 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-01-30 22:55:28,655 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-01-30 22:55:28,656 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-01-30 22:55:28,657 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-01-30 22:55:28,658 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-01-30 22:55:28,664 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-30 22:55:28,664 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-30 22:55:28,665 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-30 22:55:28,665 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2022-01-30 22:55:28,680 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-30 22:55:28,680 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-30 22:55:28,680 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-01-30 22:55:28,680 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-01-30 22:55:28,681 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-01-30 22:55:28,681 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-01-30 22:55:28,681 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-01-30 22:55:28,681 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-01-30 22:55:28,682 INFO L138 SettingsManager]: * Use SBE=true [2022-01-30 22:55:28,682 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-30 22:55:28,682 INFO L138 SettingsManager]: * sizeof long=4 [2022-01-30 22:55:28,682 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-30 22:55:28,682 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-01-30 22:55:28,682 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-30 22:55:28,682 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-30 22:55:28,683 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-30 22:55:28,683 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-30 22:55:28,683 INFO L138 SettingsManager]: * sizeof long double=12 [2022-01-30 22:55:28,683 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-30 22:55:28,683 INFO L138 SettingsManager]: * Use constant arrays=true [2022-01-30 22:55:28,683 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-30 22:55:28,683 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-30 22:55:28,683 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-30 22:55:28,684 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-30 22:55:28,685 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-30 22:55:28,685 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-30 22:55:28,685 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-01-30 22:55:28,685 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-01-30 22:55:28,686 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-01-30 22:55:28,686 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-01-30 22:55:28,686 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-01-30 22:55:28,686 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-01-30 22:55:28,686 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-01-30 22:55:28,686 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-30 22:55:28,904 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-30 22:55:28,940 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-30 22:55:28,942 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-30 22:55:28,943 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-30 22:55:28,944 INFO L275 PluginConnector]: CDTParser initialized [2022-01-30 22:55:28,945 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-programs/partial_mod_count_limited_3.c [2022-01-30 22:55:29,013 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ade1cecc4/94e02f7f833f482c9039f9d8b3c3917e/FLAG1101efdaf [2022-01-30 22:55:29,378 INFO L306 CDTParser]: Found 1 translation units. [2022-01-30 22:55:29,378 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-programs/partial_mod_count_limited_3.c [2022-01-30 22:55:29,383 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ade1cecc4/94e02f7f833f482c9039f9d8b3c3917e/FLAG1101efdaf [2022-01-30 22:55:29,393 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ade1cecc4/94e02f7f833f482c9039f9d8b3c3917e [2022-01-30 22:55:29,395 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-30 22:55:29,396 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-01-30 22:55:29,397 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-30 22:55:29,397 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-30 22:55:29,400 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-30 22:55:29,400 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.01 10:55:29" (1/1) ... [2022-01-30 22:55:29,401 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4fea0647 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.01 10:55:29, skipping insertion in model container [2022-01-30 22:55:29,401 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.01 10:55:29" (1/1) ... [2022-01-30 22:55:29,406 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-30 22:55:29,414 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-30 22:55:29,500 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/array-programs/partial_mod_count_limited_3.c[331,344] [2022-01-30 22:55:29,591 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-30 22:55:29,597 INFO L203 MainTranslator]: Completed pre-run [2022-01-30 22:55:29,605 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/array-programs/partial_mod_count_limited_3.c[331,344] [2022-01-30 22:55:29,610 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-30 22:55:29,619 INFO L208 MainTranslator]: Completed translation [2022-01-30 22:55:29,619 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.01 10:55:29 WrapperNode [2022-01-30 22:55:29,619 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-30 22:55:29,620 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-30 22:55:29,620 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-30 22:55:29,620 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-30 22:55:29,628 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.01 10:55:29" (1/1) ... [2022-01-30 22:55:29,628 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.01 10:55:29" (1/1) ... [2022-01-30 22:55:29,633 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.01 10:55:29" (1/1) ... [2022-01-30 22:55:29,633 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.01 10:55:29" (1/1) ... [2022-01-30 22:55:29,641 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.01 10:55:29" (1/1) ... [2022-01-30 22:55:29,644 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.01 10:55:29" (1/1) ... [2022-01-30 22:55:29,646 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.01 10:55:29" (1/1) ... [2022-01-30 22:55:29,647 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-30 22:55:29,648 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-30 22:55:29,648 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-30 22:55:29,648 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-30 22:55:29,649 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.01 10:55:29" (1/1) ... [2022-01-30 22:55:29,654 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-30 22:55:29,664 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-30 22:55:29,674 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-01-30 22:55:29,682 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-01-30 22:55:29,701 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-01-30 22:55:29,701 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-30 22:55:29,701 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-01-30 22:55:29,702 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-01-30 22:55:29,702 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-01-30 22:55:29,702 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-01-30 22:55:29,702 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-01-30 22:55:29,702 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-01-30 22:55:29,702 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-01-30 22:55:29,702 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-30 22:55:29,702 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-01-30 22:55:29,702 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-01-30 22:55:29,702 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-01-30 22:55:29,702 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-01-30 22:55:29,702 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-01-30 22:55:29,703 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-01-30 22:55:29,703 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-01-30 22:55:29,703 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-01-30 22:55:29,703 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-01-30 22:55:29,703 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-01-30 22:55:29,703 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-30 22:55:29,747 INFO L234 CfgBuilder]: Building ICFG [2022-01-30 22:55:29,748 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-30 22:55:29,856 INFO L275 CfgBuilder]: Performing block encoding [2022-01-30 22:55:29,861 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-30 22:55:29,861 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-01-30 22:55:29,862 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.01 10:55:29 BoogieIcfgContainer [2022-01-30 22:55:29,862 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-30 22:55:29,864 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-30 22:55:29,864 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-30 22:55:29,866 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-30 22:55:29,866 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 30.01 10:55:29" (1/3) ... [2022-01-30 22:55:29,867 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4cc0dc22 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.01 10:55:29, skipping insertion in model container [2022-01-30 22:55:29,867 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.01 10:55:29" (2/3) ... [2022-01-30 22:55:29,867 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4cc0dc22 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.01 10:55:29, skipping insertion in model container [2022-01-30 22:55:29,867 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.01 10:55:29" (3/3) ... [2022-01-30 22:55:29,868 INFO L111 eAbstractionObserver]: Analyzing ICFG partial_mod_count_limited_3.c [2022-01-30 22:55:29,871 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-01-30 22:55:29,872 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-30 22:55:29,904 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-30 22:55:29,909 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2022-01-30 22:55:29,909 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-01-30 22:55:29,932 INFO L276 IsEmpty]: Start isEmpty. Operand has 33 states, 23 states have (on average 1.434782608695652) internal successors, (33), 24 states have internal predecessors, (33), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-01-30 22:55:29,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-30 22:55:29,936 INFO L506 BasicCegarLoop]: Found error trace [2022-01-30 22:55:29,937 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-30 22:55:29,937 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-30 22:55:29,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-30 22:55:29,947 INFO L85 PathProgramCache]: Analyzing trace with hash 2033071227, now seen corresponding path program 1 times [2022-01-30 22:55:29,953 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-30 22:55:29,954 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [612280797] [2022-01-30 22:55:29,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-30 22:55:29,955 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-30 22:55:30,037 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-30 22:55:30,038 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1478950196] [2022-01-30 22:55:30,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-30 22:55:30,038 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-30 22:55:30,038 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-30 22:55:30,040 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) [2022-01-30 22:55:30,041 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-01-30 22:55:30,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:55:30,118 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 1 conjunts are in the unsatisfiable core [2022-01-30 22:55:30,121 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-30 22:55:30,178 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-30 22:55:30,178 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-30 22:55:30,179 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-30 22:55:30,179 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [612280797] [2022-01-30 22:55:30,179 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-30 22:55:30,179 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1478950196] [2022-01-30 22:55:30,179 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1478950196] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-30 22:55:30,180 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-30 22:55:30,180 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-01-30 22:55:30,181 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1093502432] [2022-01-30 22:55:30,182 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-30 22:55:30,184 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-01-30 22:55:30,185 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-30 22:55:30,203 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-01-30 22:55:30,204 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-01-30 22:55:30,205 INFO L87 Difference]: Start difference. First operand has 33 states, 23 states have (on average 1.434782608695652) internal successors, (33), 24 states have internal predecessors, (33), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand has 2 states, 2 states have (on average 7.0) internal successors, (14), 2 states have internal predecessors, (14), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-30 22:55:30,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-30 22:55:30,220 INFO L93 Difference]: Finished difference Result 57 states and 73 transitions. [2022-01-30 22:55:30,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-01-30 22:55:30,222 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 7.0) internal successors, (14), 2 states have internal predecessors, (14), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 20 [2022-01-30 22:55:30,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-30 22:55:30,227 INFO L225 Difference]: With dead ends: 57 [2022-01-30 22:55:30,227 INFO L226 Difference]: Without dead ends: 28 [2022-01-30 22:55:30,230 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-01-30 22:55:30,232 INFO L933 BasicCegarLoop]: 37 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, 37 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-30 22:55:30,233 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-30 22:55:30,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2022-01-30 22:55:30,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2022-01-30 22:55:30,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 20 states have (on average 1.25) internal successors, (25), 20 states have internal predecessors, (25), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-30 22:55:30,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 32 transitions. [2022-01-30 22:55:30,261 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 32 transitions. Word has length 20 [2022-01-30 22:55:30,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-30 22:55:30,262 INFO L470 AbstractCegarLoop]: Abstraction has 28 states and 32 transitions. [2022-01-30 22:55:30,262 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 7.0) internal successors, (14), 2 states have internal predecessors, (14), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-30 22:55:30,262 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 32 transitions. [2022-01-30 22:55:30,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-30 22:55:30,263 INFO L506 BasicCegarLoop]: Found error trace [2022-01-30 22:55:30,263 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-30 22:55:30,280 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-01-30 22:55:30,483 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2022-01-30 22:55:30,484 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-30 22:55:30,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-30 22:55:30,485 INFO L85 PathProgramCache]: Analyzing trace with hash -2003730631, now seen corresponding path program 1 times [2022-01-30 22:55:30,485 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-30 22:55:30,485 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1416567360] [2022-01-30 22:55:30,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-30 22:55:30,485 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-30 22:55:30,498 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-30 22:55:30,498 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1560616212] [2022-01-30 22:55:30,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-30 22:55:30,499 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-30 22:55:30,499 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-30 22:55:30,500 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) [2022-01-30 22:55:30,501 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-01-30 22:55:30,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:55:30,553 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 3 conjunts are in the unsatisfiable core [2022-01-30 22:55:30,555 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-30 22:55:30,656 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-30 22:55:30,657 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-30 22:55:30,657 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-30 22:55:30,657 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1416567360] [2022-01-30 22:55:30,657 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-30 22:55:30,657 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1560616212] [2022-01-30 22:55:30,657 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1560616212] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-30 22:55:30,657 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-30 22:55:30,657 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-30 22:55:30,658 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1398860566] [2022-01-30 22:55:30,658 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-30 22:55:30,658 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-30 22:55:30,659 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-30 22:55:30,659 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-30 22:55:30,659 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-01-30 22:55:30,659 INFO L87 Difference]: Start difference. First operand 28 states and 32 transitions. Second operand has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-30 22:55:30,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-30 22:55:30,723 INFO L93 Difference]: Finished difference Result 53 states and 66 transitions. [2022-01-30 22:55:30,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-30 22:55:30,724 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 20 [2022-01-30 22:55:30,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-30 22:55:30,726 INFO L225 Difference]: With dead ends: 53 [2022-01-30 22:55:30,726 INFO L226 Difference]: Without dead ends: 37 [2022-01-30 22:55:30,726 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-01-30 22:55:30,727 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 28 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-30 22:55:30,727 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 38 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-30 22:55:30,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2022-01-30 22:55:30,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 30. [2022-01-30 22:55:30,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 22 states have (on average 1.2272727272727273) internal successors, (27), 22 states have internal predecessors, (27), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-30 22:55:30,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 34 transitions. [2022-01-30 22:55:30,734 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 34 transitions. Word has length 20 [2022-01-30 22:55:30,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-30 22:55:30,734 INFO L470 AbstractCegarLoop]: Abstraction has 30 states and 34 transitions. [2022-01-30 22:55:30,735 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-30 22:55:30,735 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 34 transitions. [2022-01-30 22:55:30,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-01-30 22:55:30,735 INFO L506 BasicCegarLoop]: Found error trace [2022-01-30 22:55:30,735 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-30 22:55:30,752 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-01-30 22:55:30,952 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2022-01-30 22:55:30,952 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-30 22:55:30,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-30 22:55:30,953 INFO L85 PathProgramCache]: Analyzing trace with hash 1543382071, now seen corresponding path program 1 times [2022-01-30 22:55:30,953 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-30 22:55:30,954 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1300766007] [2022-01-30 22:55:30,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-30 22:55:30,954 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-30 22:55:30,984 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-30 22:55:30,984 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [455405114] [2022-01-30 22:55:30,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-30 22:55:30,985 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-30 22:55:30,985 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-30 22:55:30,993 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) [2022-01-30 22:55:30,994 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-01-30 22:55:31,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:55:31,036 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-30 22:55:31,038 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-30 22:55:31,116 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-30 22:55:31,116 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-30 22:55:31,181 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-30 22:55:31,182 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-30 22:55:31,182 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1300766007] [2022-01-30 22:55:31,182 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-30 22:55:31,182 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [455405114] [2022-01-30 22:55:31,182 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [455405114] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-30 22:55:31,182 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-30 22:55:31,182 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2022-01-30 22:55:31,183 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1741301090] [2022-01-30 22:55:31,183 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-30 22:55:31,183 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-01-30 22:55:31,183 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-30 22:55:31,183 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-01-30 22:55:31,184 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2022-01-30 22:55:31,184 INFO L87 Difference]: Start difference. First operand 30 states and 34 transitions. Second operand has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 4 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) [2022-01-30 22:55:31,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-30 22:55:31,284 INFO L93 Difference]: Finished difference Result 73 states and 95 transitions. [2022-01-30 22:55:31,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-30 22:55:31,285 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 4 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) Word has length 25 [2022-01-30 22:55:31,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-30 22:55:31,286 INFO L225 Difference]: With dead ends: 73 [2022-01-30 22:55:31,286 INFO L226 Difference]: Without dead ends: 57 [2022-01-30 22:55:31,286 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=50, Unknown=0, NotChecked=0, Total=90 [2022-01-30 22:55:31,287 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 134 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 136 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 96 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-30 22:55:31,287 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [136 Valid, 45 Invalid, 96 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-30 22:55:31,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2022-01-30 22:55:31,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 44. [2022-01-30 22:55:31,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 36 states have (on average 1.25) internal successors, (45), 36 states have internal predecessors, (45), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-30 22:55:31,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 52 transitions. [2022-01-30 22:55:31,294 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 52 transitions. Word has length 25 [2022-01-30 22:55:31,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-30 22:55:31,294 INFO L470 AbstractCegarLoop]: Abstraction has 44 states and 52 transitions. [2022-01-30 22:55:31,294 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 4 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) [2022-01-30 22:55:31,294 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 52 transitions. [2022-01-30 22:55:31,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-01-30 22:55:31,295 INFO L506 BasicCegarLoop]: Found error trace [2022-01-30 22:55:31,295 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-30 22:55:31,314 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-01-30 22:55:31,512 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-30 22:55:31,513 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-30 22:55:31,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-30 22:55:31,514 INFO L85 PathProgramCache]: Analyzing trace with hash 156886521, now seen corresponding path program 1 times [2022-01-30 22:55:31,514 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-30 22:55:31,514 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1529037058] [2022-01-30 22:55:31,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-30 22:55:31,515 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-30 22:55:31,532 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-30 22:55:31,533 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [153151604] [2022-01-30 22:55:31,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-30 22:55:31,533 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-30 22:55:31,533 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-30 22:55:31,534 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) [2022-01-30 22:55:31,547 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-01-30 22:55:31,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:55:31,597 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-30 22:55:31,611 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-30 22:55:31,809 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-30 22:55:31,809 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-30 22:55:31,932 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-30 22:55:31,933 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-30 22:55:31,933 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1529037058] [2022-01-30 22:55:31,933 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-30 22:55:31,933 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [153151604] [2022-01-30 22:55:31,934 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [153151604] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-30 22:55:31,934 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-30 22:55:31,934 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2022-01-30 22:55:31,934 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1330363505] [2022-01-30 22:55:31,934 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-30 22:55:31,935 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-01-30 22:55:31,935 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-30 22:55:31,936 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-01-30 22:55:31,938 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=101, Unknown=0, NotChecked=0, Total=182 [2022-01-30 22:55:31,938 INFO L87 Difference]: Start difference. First operand 44 states and 52 transitions. Second operand has 14 states, 14 states have (on average 4.428571428571429) internal successors, (62), 14 states have internal predecessors, (62), 4 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) [2022-01-30 22:55:32,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-30 22:55:32,208 INFO L93 Difference]: Finished difference Result 131 states and 180 transitions. [2022-01-30 22:55:32,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-30 22:55:32,209 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.428571428571429) internal successors, (62), 14 states have internal predecessors, (62), 4 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) Word has length 40 [2022-01-30 22:55:32,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-30 22:55:32,218 INFO L225 Difference]: With dead ends: 131 [2022-01-30 22:55:32,219 INFO L226 Difference]: Without dead ends: 111 [2022-01-30 22:55:32,222 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=151, Invalid=191, Unknown=0, NotChecked=0, Total=342 [2022-01-30 22:55:32,223 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 238 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 113 mSolverCounterSat, 85 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 243 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 198 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 85 IncrementalHoareTripleChecker+Valid, 113 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-30 22:55:32,223 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [243 Valid, 70 Invalid, 198 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [85 Valid, 113 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-30 22:55:32,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2022-01-30 22:55:32,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 74. [2022-01-30 22:55:32,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 66 states have (on average 1.2727272727272727) internal successors, (84), 66 states have internal predecessors, (84), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-30 22:55:32,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 91 transitions. [2022-01-30 22:55:32,240 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 91 transitions. Word has length 40 [2022-01-30 22:55:32,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-30 22:55:32,240 INFO L470 AbstractCegarLoop]: Abstraction has 74 states and 91 transitions. [2022-01-30 22:55:32,241 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 4.428571428571429) internal successors, (62), 14 states have internal predecessors, (62), 4 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) [2022-01-30 22:55:32,241 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 91 transitions. [2022-01-30 22:55:32,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-01-30 22:55:32,244 INFO L506 BasicCegarLoop]: Found error trace [2022-01-30 22:55:32,244 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-30 22:55:32,264 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-01-30 22:55:32,462 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-30 22:55:32,462 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-30 22:55:32,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-30 22:55:32,464 INFO L85 PathProgramCache]: Analyzing trace with hash -476238917, now seen corresponding path program 2 times [2022-01-30 22:55:32,464 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-30 22:55:32,464 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1158679939] [2022-01-30 22:55:32,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-30 22:55:32,464 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-30 22:55:32,480 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-30 22:55:32,480 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1740420492] [2022-01-30 22:55:32,480 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-30 22:55:32,481 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-30 22:55:32,481 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-30 22:55:32,504 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) [2022-01-30 22:55:32,510 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-01-30 22:55:32,590 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-01-30 22:55:32,590 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-30 22:55:32,591 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 11 conjunts are in the unsatisfiable core [2022-01-30 22:55:32,594 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-30 22:55:32,962 INFO L134 CoverageAnalysis]: Checked inductivity of 235 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 235 trivial. 0 not checked. [2022-01-30 22:55:32,962 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-30 22:55:32,962 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-30 22:55:32,962 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1158679939] [2022-01-30 22:55:32,962 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-30 22:55:32,962 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1740420492] [2022-01-30 22:55:32,962 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1740420492] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-30 22:55:32,963 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-30 22:55:32,963 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-01-30 22:55:32,963 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1418354528] [2022-01-30 22:55:32,963 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-30 22:55:32,963 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-01-30 22:55:32,963 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-30 22:55:32,964 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-01-30 22:55:32,964 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-01-30 22:55:32,964 INFO L87 Difference]: Start difference. First operand 74 states and 91 transitions. Second operand has 7 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 5 states have internal predecessors, (20), 4 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-30 22:55:33,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-30 22:55:33,086 INFO L93 Difference]: Finished difference Result 88 states and 108 transitions. [2022-01-30 22:55:33,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-30 22:55:33,087 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 5 states have internal predecessors, (20), 4 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 70 [2022-01-30 22:55:33,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-30 22:55:33,088 INFO L225 Difference]: With dead ends: 88 [2022-01-30 22:55:33,088 INFO L226 Difference]: Without dead ends: 86 [2022-01-30 22:55:33,088 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2022-01-30 22:55:33,089 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 43 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 98 SdHoareTripleChecker+Invalid, 81 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-30 22:55:33,089 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 98 Invalid, 81 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-30 22:55:33,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2022-01-30 22:55:33,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 86. [2022-01-30 22:55:33,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 75 states have (on average 1.2666666666666666) internal successors, (95), 75 states have internal predecessors, (95), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-01-30 22:55:33,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 106 transitions. [2022-01-30 22:55:33,098 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 106 transitions. Word has length 70 [2022-01-30 22:55:33,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-30 22:55:33,098 INFO L470 AbstractCegarLoop]: Abstraction has 86 states and 106 transitions. [2022-01-30 22:55:33,098 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 5 states have internal predecessors, (20), 4 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-30 22:55:33,099 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 106 transitions. [2022-01-30 22:55:33,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2022-01-30 22:55:33,100 INFO L506 BasicCegarLoop]: Found error trace [2022-01-30 22:55:33,100 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 5, 5, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-30 22:55:33,133 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-01-30 22:55:33,319 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-30 22:55:33,319 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-30 22:55:33,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-30 22:55:33,320 INFO L85 PathProgramCache]: Analyzing trace with hash -1825589254, now seen corresponding path program 1 times [2022-01-30 22:55:33,320 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-30 22:55:33,320 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [111575346] [2022-01-30 22:55:33,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-30 22:55:33,320 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-30 22:55:33,337 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-30 22:55:33,337 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [982910113] [2022-01-30 22:55:33,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-30 22:55:33,337 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-30 22:55:33,338 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-30 22:55:33,339 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) [2022-01-30 22:55:33,340 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-01-30 22:55:33,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:55:33,429 INFO L263 TraceCheckSpWp]: Trace formula consists of 254 conjuncts, 13 conjunts are in the unsatisfiable core [2022-01-30 22:55:33,437 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-30 22:55:33,734 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 0 proven. 235 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-01-30 22:55:33,735 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-30 22:55:34,014 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 2 proven. 235 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-30 22:55:34,015 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-30 22:55:34,015 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [111575346] [2022-01-30 22:55:34,015 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-30 22:55:34,015 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [982910113] [2022-01-30 22:55:34,015 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [982910113] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-30 22:55:34,015 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-30 22:55:34,015 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2022-01-30 22:55:34,015 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2090289824] [2022-01-30 22:55:34,015 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-30 22:55:34,016 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-30 22:55:34,016 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-30 22:55:34,016 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-30 22:55:34,017 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=303, Invalid=347, Unknown=0, NotChecked=0, Total=650 [2022-01-30 22:55:34,017 INFO L87 Difference]: Start difference. First operand 86 states and 106 transitions. Second operand has 26 states, 26 states have (on average 4.923076923076923) internal successors, (128), 26 states have internal predecessors, (128), 4 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (6), 3 states have call predecessors, (6), 4 states have call successors, (6) [2022-01-30 22:55:34,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-30 22:55:34,596 INFO L93 Difference]: Finished difference Result 440 states and 632 transitions. [2022-01-30 22:55:34,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-01-30 22:55:34,596 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 4.923076923076923) internal successors, (128), 26 states have internal predecessors, (128), 4 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (6), 3 states have call predecessors, (6), 4 states have call successors, (6) Word has length 78 [2022-01-30 22:55:34,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-30 22:55:34,599 INFO L225 Difference]: With dead ends: 440 [2022-01-30 22:55:34,599 INFO L226 Difference]: Without dead ends: 393 [2022-01-30 22:55:34,600 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 131 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 253 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=589, Invalid=743, Unknown=0, NotChecked=0, Total=1332 [2022-01-30 22:55:34,601 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 605 mSDsluCounter, 125 mSDsCounter, 0 mSdLazyCounter, 276 mSolverCounterSat, 238 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 616 SdHoareTripleChecker+Valid, 147 SdHoareTripleChecker+Invalid, 514 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 238 IncrementalHoareTripleChecker+Valid, 276 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-30 22:55:34,601 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [616 Valid, 147 Invalid, 514 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [238 Valid, 276 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-30 22:55:34,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 393 states. [2022-01-30 22:55:34,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 393 to 146. [2022-01-30 22:55:34,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 135 states have (on average 1.2814814814814814) internal successors, (173), 135 states have internal predecessors, (173), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-01-30 22:55:34,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 184 transitions. [2022-01-30 22:55:34,624 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 184 transitions. Word has length 78 [2022-01-30 22:55:34,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-30 22:55:34,625 INFO L470 AbstractCegarLoop]: Abstraction has 146 states and 184 transitions. [2022-01-30 22:55:34,625 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 4.923076923076923) internal successors, (128), 26 states have internal predecessors, (128), 4 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (6), 3 states have call predecessors, (6), 4 states have call successors, (6) [2022-01-30 22:55:34,625 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 184 transitions. [2022-01-30 22:55:34,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2022-01-30 22:55:34,626 INFO L506 BasicCegarLoop]: Found error trace [2022-01-30 22:55:34,626 INFO L514 BasicCegarLoop]: trace histogram [22, 22, 22, 22, 11, 11, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-30 22:55:34,646 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-01-30 22:55:34,843 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-30 22:55:34,843 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-30 22:55:34,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-30 22:55:34,844 INFO L85 PathProgramCache]: Analyzing trace with hash 1125932218, now seen corresponding path program 2 times [2022-01-30 22:55:34,844 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-30 22:55:34,844 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2047439671] [2022-01-30 22:55:34,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-30 22:55:34,844 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-30 22:55:34,866 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-30 22:55:34,867 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2021088901] [2022-01-30 22:55:34,867 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-30 22:55:34,867 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-30 22:55:34,867 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-30 22:55:34,884 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) [2022-01-30 22:55:34,907 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-01-30 22:55:35,039 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-30 22:55:35,039 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-30 22:55:35,043 INFO L263 TraceCheckSpWp]: Trace formula consists of 416 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-30 22:55:35,046 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-30 22:55:35,840 INFO L134 CoverageAnalysis]: Checked inductivity of 1182 backedges. 0 proven. 1177 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-01-30 22:55:35,840 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-30 22:55:36,723 INFO L134 CoverageAnalysis]: Checked inductivity of 1182 backedges. 2 proven. 1177 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-30 22:55:36,723 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-30 22:55:36,723 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2047439671] [2022-01-30 22:55:36,723 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-30 22:55:36,723 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2021088901] [2022-01-30 22:55:36,723 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2021088901] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-30 22:55:36,724 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-30 22:55:36,724 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 50 [2022-01-30 22:55:36,724 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1358157591] [2022-01-30 22:55:36,724 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-30 22:55:36,724 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2022-01-30 22:55:36,724 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-30 22:55:36,725 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2022-01-30 22:55:36,726 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1179, Invalid=1271, Unknown=0, NotChecked=0, Total=2450 [2022-01-30 22:55:36,726 INFO L87 Difference]: Start difference. First operand 146 states and 184 transitions. Second operand has 50 states, 50 states have (on average 4.96) internal successors, (248), 50 states have internal predecessors, (248), 4 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (6), 3 states have call predecessors, (6), 4 states have call successors, (6) [2022-01-30 22:55:38,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-30 22:55:38,474 INFO L93 Difference]: Finished difference Result 878 states and 1280 transitions. [2022-01-30 22:55:38,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-01-30 22:55:38,474 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 4.96) internal successors, (248), 50 states have internal predecessors, (248), 4 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (6), 3 states have call predecessors, (6), 4 states have call successors, (6) Word has length 138 [2022-01-30 22:55:38,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-30 22:55:38,478 INFO L225 Difference]: With dead ends: 878 [2022-01-30 22:55:38,478 INFO L226 Difference]: Without dead ends: 801 [2022-01-30 22:55:38,480 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 298 GetRequests, 227 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1081 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=2329, Invalid=2927, Unknown=0, NotChecked=0, Total=5256 [2022-01-30 22:55:38,480 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 1114 mSDsluCounter, 232 mSDsCounter, 0 mSdLazyCounter, 521 mSolverCounterSat, 432 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1137 SdHoareTripleChecker+Valid, 254 SdHoareTripleChecker+Invalid, 953 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 432 IncrementalHoareTripleChecker+Valid, 521 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-30 22:55:38,481 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1137 Valid, 254 Invalid, 953 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [432 Valid, 521 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-30 22:55:38,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 801 states. [2022-01-30 22:55:38,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 801 to 266. [2022-01-30 22:55:38,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 266 states, 255 states have (on average 1.2901960784313726) internal successors, (329), 255 states have internal predecessors, (329), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-01-30 22:55:38,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 266 states to 266 states and 340 transitions. [2022-01-30 22:55:38,508 INFO L78 Accepts]: Start accepts. Automaton has 266 states and 340 transitions. Word has length 138 [2022-01-30 22:55:38,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-30 22:55:38,509 INFO L470 AbstractCegarLoop]: Abstraction has 266 states and 340 transitions. [2022-01-30 22:55:38,509 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 4.96) internal successors, (248), 50 states have internal predecessors, (248), 4 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (6), 3 states have call predecessors, (6), 4 states have call successors, (6) [2022-01-30 22:55:38,509 INFO L276 IsEmpty]: Start isEmpty. Operand 266 states and 340 transitions. [2022-01-30 22:55:38,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 259 [2022-01-30 22:55:38,511 INFO L506 BasicCegarLoop]: Found error trace [2022-01-30 22:55:38,511 INFO L514 BasicCegarLoop]: trace histogram [46, 46, 46, 46, 23, 23, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-30 22:55:38,529 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-01-30 22:55:38,727 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-30 22:55:38,728 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-30 22:55:38,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-30 22:55:38,728 INFO L85 PathProgramCache]: Analyzing trace with hash -284584390, now seen corresponding path program 3 times [2022-01-30 22:55:38,728 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-30 22:55:38,728 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1975338775] [2022-01-30 22:55:38,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-30 22:55:38,728 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-30 22:55:38,770 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-30 22:55:38,771 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [283728684] [2022-01-30 22:55:38,771 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-30 22:55:38,771 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-30 22:55:38,772 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-30 22:55:38,774 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) [2022-01-30 22:55:38,776 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-01-30 22:55:38,920 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-01-30 22:55:38,920 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-30 22:55:38,922 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 18 conjunts are in the unsatisfiable core [2022-01-30 22:55:38,925 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-30 22:55:40,360 INFO L134 CoverageAnalysis]: Checked inductivity of 5226 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 5221 trivial. 0 not checked. [2022-01-30 22:55:40,360 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-30 22:55:50,480 INFO L134 CoverageAnalysis]: Checked inductivity of 5226 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 5221 trivial. 0 not checked. [2022-01-30 22:55:50,480 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-30 22:55:50,480 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1975338775] [2022-01-30 22:55:50,480 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-30 22:55:50,480 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [283728684] [2022-01-30 22:55:50,480 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [283728684] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-30 22:55:50,480 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-30 22:55:50,481 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 17 [2022-01-30 22:55:50,481 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [138265871] [2022-01-30 22:55:50,481 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-30 22:55:50,481 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-30 22:55:50,481 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-30 22:55:50,481 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-30 22:55:50,482 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2022-01-30 22:55:50,482 INFO L87 Difference]: Start difference. First operand 266 states and 340 transitions. Second operand has 17 states, 14 states have (on average 3.5) internal successors, (49), 16 states have internal predecessors, (49), 9 states have call successors, (9), 4 states have call predecessors, (9), 5 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2022-01-30 22:55:51,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-30 22:55:51,167 INFO L93 Difference]: Finished difference Result 289 states and 369 transitions. [2022-01-30 22:55:51,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-30 22:55:51,168 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 14 states have (on average 3.5) internal successors, (49), 16 states have internal predecessors, (49), 9 states have call successors, (9), 4 states have call predecessors, (9), 5 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) Word has length 258 [2022-01-30 22:55:51,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-30 22:55:51,171 INFO L225 Difference]: With dead ends: 289 [2022-01-30 22:55:51,171 INFO L226 Difference]: Without dead ends: 287 [2022-01-30 22:55:51,171 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 523 GetRequests, 500 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=128, Invalid=424, Unknown=0, NotChecked=0, Total=552 [2022-01-30 22:55:51,172 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 123 mSDsluCounter, 144 mSDsCounter, 0 mSdLazyCounter, 180 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 126 SdHoareTripleChecker+Valid, 170 SdHoareTripleChecker+Invalid, 245 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 180 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 29 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-30 22:55:51,172 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [126 Valid, 170 Invalid, 245 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 180 Invalid, 0 Unknown, 29 Unchecked, 0.4s Time] [2022-01-30 22:55:51,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 287 states. [2022-01-30 22:55:51,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 287 to 287. [2022-01-30 22:55:51,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 287 states, 270 states have (on average 1.2851851851851852) internal successors, (347), 271 states have internal predecessors, (347), 10 states have call successors, (10), 7 states have call predecessors, (10), 6 states have return successors, (9), 8 states have call predecessors, (9), 9 states have call successors, (9) [2022-01-30 22:55:51,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 287 states to 287 states and 366 transitions. [2022-01-30 22:55:51,195 INFO L78 Accepts]: Start accepts. Automaton has 287 states and 366 transitions. Word has length 258 [2022-01-30 22:55:51,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-30 22:55:51,196 INFO L470 AbstractCegarLoop]: Abstraction has 287 states and 366 transitions. [2022-01-30 22:55:51,197 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 14 states have (on average 3.5) internal successors, (49), 16 states have internal predecessors, (49), 9 states have call successors, (9), 4 states have call predecessors, (9), 5 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2022-01-30 22:55:51,197 INFO L276 IsEmpty]: Start isEmpty. Operand 287 states and 366 transitions. [2022-01-30 22:55:51,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 291 [2022-01-30 22:55:51,201 INFO L506 BasicCegarLoop]: Found error trace [2022-01-30 22:55:51,201 INFO L514 BasicCegarLoop]: trace histogram [46, 46, 46, 46, 23, 23, 6, 6, 6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-30 22:55:51,225 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-01-30 22:55:51,425 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2022-01-30 22:55:51,425 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-30 22:55:51,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-30 22:55:51,426 INFO L85 PathProgramCache]: Analyzing trace with hash 770830646, now seen corresponding path program 4 times [2022-01-30 22:55:51,426 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-30 22:55:51,426 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [973774287] [2022-01-30 22:55:51,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-30 22:55:51,426 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-30 22:55:51,460 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-30 22:55:51,461 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2127027514] [2022-01-30 22:55:51,461 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-30 22:55:51,461 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-30 22:55:51,461 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-30 22:55:51,469 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) [2022-01-30 22:55:51,471 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-01-30 22:55:57,937 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-30 22:55:57,938 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-30 22:55:57,956 INFO L263 TraceCheckSpWp]: Trace formula consists of 812 conjuncts, 49 conjunts are in the unsatisfiable core [2022-01-30 22:55:57,960 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-30 22:56:00,269 INFO L134 CoverageAnalysis]: Checked inductivity of 5326 backedges. 0 proven. 5221 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2022-01-30 22:56:00,269 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-30 22:56:03,919 INFO L134 CoverageAnalysis]: Checked inductivity of 5326 backedges. 10 proven. 5221 refuted. 0 times theorem prover too weak. 95 trivial. 0 not checked. [2022-01-30 22:56:03,920 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-30 22:56:03,920 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [973774287] [2022-01-30 22:56:03,920 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-30 22:56:03,920 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2127027514] [2022-01-30 22:56:03,920 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2127027514] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-30 22:56:03,920 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-30 22:56:03,920 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 50] total 98 [2022-01-30 22:56:03,923 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [388810431] [2022-01-30 22:56:03,923 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-30 22:56:03,924 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 98 states [2022-01-30 22:56:03,925 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-30 22:56:03,926 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants. [2022-01-30 22:56:03,928 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4659, Invalid=4847, Unknown=0, NotChecked=0, Total=9506 [2022-01-30 22:56:03,928 INFO L87 Difference]: Start difference. First operand 287 states and 366 transitions. Second operand has 98 states, 98 states have (on average 4.979591836734694) internal successors, (488), 98 states have internal predecessors, (488), 4 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (6), 3 states have call predecessors, (6), 4 states have call successors, (6) [2022-01-30 22:56:15,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-30 22:56:15,691 INFO L93 Difference]: Finished difference Result 2961 states and 4418 transitions. [2022-01-30 22:56:15,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2022-01-30 22:56:15,693 INFO L78 Accepts]: Start accepts. Automaton has has 98 states, 98 states have (on average 4.979591836734694) internal successors, (488), 98 states have internal predecessors, (488), 4 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (6), 3 states have call predecessors, (6), 4 states have call successors, (6) Word has length 290 [2022-01-30 22:56:15,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-30 22:56:15,708 INFO L225 Difference]: With dead ends: 2961 [2022-01-30 22:56:15,708 INFO L226 Difference]: Without dead ends: 2803 [2022-01-30 22:56:15,713 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 626 GetRequests, 483 SyntacticMatches, 0 SemanticMatches, 143 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4465 ImplicationChecksByTransitivity, 9.7s TimeCoverageRelationStatistics Valid=9265, Invalid=11615, Unknown=0, NotChecked=0, Total=20880 [2022-01-30 22:56:15,714 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 3559 mSDsluCounter, 433 mSDsCounter, 0 mSdLazyCounter, 1124 mSolverCounterSat, 1307 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3606 SdHoareTripleChecker+Valid, 455 SdHoareTripleChecker+Invalid, 2431 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1307 IncrementalHoareTripleChecker+Valid, 1124 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.3s IncrementalHoareTripleChecker+Time [2022-01-30 22:56:15,714 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3606 Valid, 455 Invalid, 2431 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1307 Valid, 1124 Invalid, 0 Unknown, 0 Unchecked, 3.3s Time] [2022-01-30 22:56:15,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2803 states. [2022-01-30 22:56:15,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2803 to 527. [2022-01-30 22:56:15,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 527 states, 510 states have (on average 1.2921568627450981) internal successors, (659), 511 states have internal predecessors, (659), 10 states have call successors, (10), 7 states have call predecessors, (10), 6 states have return successors, (9), 8 states have call predecessors, (9), 9 states have call successors, (9) [2022-01-30 22:56:15,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 527 states to 527 states and 678 transitions. [2022-01-30 22:56:15,836 INFO L78 Accepts]: Start accepts. Automaton has 527 states and 678 transitions. Word has length 290 [2022-01-30 22:56:15,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-30 22:56:15,836 INFO L470 AbstractCegarLoop]: Abstraction has 527 states and 678 transitions. [2022-01-30 22:56:15,837 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 98 states, 98 states have (on average 4.979591836734694) internal successors, (488), 98 states have internal predecessors, (488), 4 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (6), 3 states have call predecessors, (6), 4 states have call successors, (6) [2022-01-30 22:56:15,837 INFO L276 IsEmpty]: Start isEmpty. Operand 527 states and 678 transitions. [2022-01-30 22:56:15,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 531 [2022-01-30 22:56:15,842 INFO L506 BasicCegarLoop]: Found error trace [2022-01-30 22:56:15,842 INFO L514 BasicCegarLoop]: trace histogram [94, 94, 94, 94, 47, 47, 6, 6, 6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-30 22:56:15,881 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-01-30 22:56:16,082 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-30 22:56:16,082 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-30 22:56:16,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-30 22:56:16,083 INFO L85 PathProgramCache]: Analyzing trace with hash 1283466294, now seen corresponding path program 5 times [2022-01-30 22:56:16,083 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-30 22:56:16,083 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1027515799] [2022-01-30 22:56:16,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-30 22:56:16,083 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-30 22:56:16,168 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-30 22:56:16,169 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [301757353] [2022-01-30 22:56:16,169 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-30 22:56:16,169 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-30 22:56:16,169 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-30 22:56:16,188 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) [2022-01-30 22:56:16,190 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process