/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationJordan_32.epf -i ../../../trunk/examples/svcomp/nla-digbench-scaling/egcd2-ll_unwindbound20.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-34549b5 [2022-04-06 16:30:15,774 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-04-06 16:30:15,775 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-04-06 16:30:15,820 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-04-06 16:30:15,841 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-04-06 16:30:15,843 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-04-06 16:30:15,844 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-04-06 16:30:15,846 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-04-06 16:30:15,847 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-04-06 16:30:15,847 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-04-06 16:30:15,849 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-04-06 16:30:15,853 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-04-06 16:30:15,855 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-04-06 16:30:15,856 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-04-06 16:30:15,856 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-04-06 16:30:15,857 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-04-06 16:30:15,858 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-04-06 16:30:15,859 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-04-06 16:30:15,864 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-04-06 16:30:15,865 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-04-06 16:30:15,866 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-04-06 16:30:15,866 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationJordan_32.epf [2022-04-06 16:30:15,873 INFO L113 SettingsManager]: Loading preferences was successful [2022-04-06 16:30:15,873 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-04-06 16:30:15,874 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-04-06 16:30:15,874 INFO L138 SettingsManager]: * sizeof long=4 [2022-04-06 16:30:15,874 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-04-06 16:30:15,874 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-04-06 16:30:15,874 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-04-06 16:30:15,874 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-04-06 16:30:15,874 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-04-06 16:30:15,875 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-04-06 16:30:15,875 INFO L138 SettingsManager]: * sizeof long double=12 [2022-04-06 16:30:15,875 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-04-06 16:30:15,875 INFO L138 SettingsManager]: * Use constant arrays=true [2022-04-06 16:30:15,875 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-04-06 16:30:15,875 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-04-06 16:30:15,876 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-04-06 16:30:15,876 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-04-06 16:30:15,876 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-04-06 16:30:15,876 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-04-06 16:30:15,876 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-04-06 16:30:15,876 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=Craig_NestedInterpolation [2022-04-06 16:30:15,876 INFO L138 SettingsManager]: * Trace refinement strategy=ACCELERATED_INTERPOLATION [2022-04-06 16:30:15,876 INFO L138 SettingsManager]: * Trace refinement strategy used in Accelerated Interpolation=CAMEL [2022-04-06 16:30:15,876 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-04-06 16:30:15,876 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=JORDAN [2022-04-06 16:30:15,876 INFO L138 SettingsManager]: * Use separate solver for trace checks=false WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-04-06 16:30:16,039 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-04-06 16:30:16,058 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-04-06 16:30:16,060 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-04-06 16:30:16,061 INFO L271 PluginConnector]: Initializing CDTParser... [2022-04-06 16:30:16,062 INFO L275 PluginConnector]: CDTParser initialized [2022-04-06 16:30:16,063 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/egcd2-ll_unwindbound20.c [2022-04-06 16:30:16,111 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b01b2662e/b2322f6842274260baf8bc53043f1037/FLAGb2d9c33b5 [2022-04-06 16:30:16,424 INFO L306 CDTParser]: Found 1 translation units. [2022-04-06 16:30:16,425 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/egcd2-ll_unwindbound20.c [2022-04-06 16:30:16,430 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b01b2662e/b2322f6842274260baf8bc53043f1037/FLAGb2d9c33b5 [2022-04-06 16:30:16,851 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b01b2662e/b2322f6842274260baf8bc53043f1037 [2022-04-06 16:30:16,853 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-04-06 16:30:16,854 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-04-06 16:30:16,855 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-04-06 16:30:16,855 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-04-06 16:30:16,857 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-04-06 16:30:16,858 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.04 04:30:16" (1/1) ... [2022-04-06 16:30:16,858 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6f5a53e1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 04:30:16, skipping insertion in model container [2022-04-06 16:30:16,858 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.04 04:30:16" (1/1) ... [2022-04-06 16:30:16,862 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-04-06 16:30:16,872 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-04-06 16:30:16,978 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/egcd2-ll_unwindbound20.c[490,503] [2022-04-06 16:30:16,992 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-04-06 16:30:16,997 INFO L203 MainTranslator]: Completed pre-run [2022-04-06 16:30:17,003 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/egcd2-ll_unwindbound20.c[490,503] [2022-04-06 16:30:17,009 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-04-06 16:30:17,018 INFO L208 MainTranslator]: Completed translation [2022-04-06 16:30:17,018 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 04:30:17 WrapperNode [2022-04-06 16:30:17,019 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-04-06 16:30:17,019 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-04-06 16:30:17,019 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-04-06 16:30:17,019 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-04-06 16:30:17,025 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 04:30:17" (1/1) ... [2022-04-06 16:30:17,025 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 04:30:17" (1/1) ... [2022-04-06 16:30:17,029 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 04:30:17" (1/1) ... [2022-04-06 16:30:17,029 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 04:30:17" (1/1) ... [2022-04-06 16:30:17,032 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 04:30:17" (1/1) ... [2022-04-06 16:30:17,035 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 04:30:17" (1/1) ... [2022-04-06 16:30:17,035 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 04:30:17" (1/1) ... [2022-04-06 16:30:17,036 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-04-06 16:30:17,037 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-04-06 16:30:17,037 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-04-06 16:30:17,037 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-04-06 16:30:17,038 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 04:30:17" (1/1) ... [2022-04-06 16:30:17,042 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-04-06 16:30:17,049 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 16:30:17,058 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-04-06 16:30:17,067 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-04-06 16:30:17,092 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-04-06 16:30:17,092 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-04-06 16:30:17,092 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-04-06 16:30:17,092 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-04-06 16:30:17,092 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-04-06 16:30:17,092 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-04-06 16:30:17,092 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-04-06 16:30:17,092 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-04-06 16:30:17,093 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-04-06 16:30:17,093 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-04-06 16:30:17,093 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-04-06 16:30:17,093 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-04-06 16:30:17,094 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-04-06 16:30:17,094 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-04-06 16:30:17,094 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-04-06 16:30:17,094 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-04-06 16:30:17,094 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-04-06 16:30:17,094 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-04-06 16:30:17,094 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-04-06 16:30:17,094 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-04-06 16:30:17,154 INFO L234 CfgBuilder]: Building ICFG [2022-04-06 16:30:17,155 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-04-06 16:30:17,353 INFO L275 CfgBuilder]: Performing block encoding [2022-04-06 16:30:17,357 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-04-06 16:30:17,358 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-04-06 16:30:17,359 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.04 04:30:17 BoogieIcfgContainer [2022-04-06 16:30:17,359 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-04-06 16:30:17,360 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-04-06 16:30:17,360 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-04-06 16:30:17,362 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-04-06 16:30:17,362 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.04 04:30:16" (1/3) ... [2022-04-06 16:30:17,363 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6db910b9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.04 04:30:17, skipping insertion in model container [2022-04-06 16:30:17,363 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 04:30:17" (2/3) ... [2022-04-06 16:30:17,363 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6db910b9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.04 04:30:17, skipping insertion in model container [2022-04-06 16:30:17,363 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.04 04:30:17" (3/3) ... [2022-04-06 16:30:17,364 INFO L111 eAbstractionObserver]: Analyzing ICFG egcd2-ll_unwindbound20.c [2022-04-06 16:30:17,367 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-04-06 16:30:17,367 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-04-06 16:30:17,395 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-04-06 16:30:17,400 INFO L340 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=Craig_NestedInterpolation, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP [2022-04-06 16:30:17,400 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-04-06 16:30:17,425 INFO L276 IsEmpty]: Start isEmpty. Operand has 39 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 23 states have internal predecessors, (30), 12 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2022-04-06 16:30:17,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-04-06 16:30:17,431 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 16:30:17,431 INFO L499 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 16:30:17,432 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 16:30:17,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 16:30:17,435 INFO L85 PathProgramCache]: Analyzing trace with hash 1950618521, now seen corresponding path program 1 times [2022-04-06 16:30:17,442 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 16:30:17,443 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [298520871] [2022-04-06 16:30:17,453 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 16:30:17,453 INFO L85 PathProgramCache]: Analyzing trace with hash 1950618521, now seen corresponding path program 2 times [2022-04-06 16:30:17,455 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 16:30:17,455 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1682048310] [2022-04-06 16:30:17,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 16:30:17,456 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 16:30:17,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 16:30:17,613 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 16:30:17,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 16:30:17,623 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-06 16:30:17,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 16:30:17,633 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-04-06 16:30:17,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 16:30:17,638 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-04-06 16:30:17,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 16:30:17,642 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-04-06 16:30:17,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 16:30:17,654 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-04-06 16:30:17,655 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 16:30:17,655 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1682048310] [2022-04-06 16:30:17,656 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1682048310] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 16:30:17,656 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 16:30:17,656 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-04-06 16:30:17,658 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 16:30:17,658 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [298520871] [2022-04-06 16:30:17,658 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [298520871] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 16:30:17,658 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 16:30:17,658 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-04-06 16:30:17,658 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1097417979] [2022-04-06 16:30:17,659 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 16:30:17,661 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-04-06 16:30:17,662 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 16:30:17,684 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-04-06 16:30:17,684 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-04-06 16:30:17,686 INFO L87 Difference]: Start difference. First operand has 39 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 23 states have internal predecessors, (30), 12 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-04-06 16:30:17,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 16:30:17,788 INFO L93 Difference]: Finished difference Result 72 states and 112 transitions. [2022-04-06 16:30:17,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-04-06 16:30:17,791 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 32 [2022-04-06 16:30:17,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 16:30:17,808 INFO L225 Difference]: With dead ends: 72 [2022-04-06 16:30:17,808 INFO L226 Difference]: Without dead ends: 35 [2022-04-06 16:30:17,811 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-04-06 16:30:17,815 INFO L913 BasicCegarLoop]: 45 mSDtfsCounter, 10 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 16:30:17,816 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 49 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 16:30:17,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2022-04-06 16:30:17,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 34. [2022-04-06 16:30:17,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 18 states have (on average 1.2777777777777777) internal successors, (23), 20 states have internal predecessors, (23), 12 states have call successors, (12), 4 states have call predecessors, (12), 3 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-04-06 16:30:17,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 45 transitions. [2022-04-06 16:30:17,863 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 45 transitions. Word has length 32 [2022-04-06 16:30:17,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 16:30:17,863 INFO L478 AbstractCegarLoop]: Abstraction has 34 states and 45 transitions. [2022-04-06 16:30:17,864 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-04-06 16:30:17,864 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 45 transitions. [2022-04-06 16:30:17,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-04-06 16:30:17,867 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 16:30:17,867 INFO L499 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 16:30:17,868 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-04-06 16:30:17,868 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 16:30:17,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 16:30:17,869 INFO L85 PathProgramCache]: Analyzing trace with hash -1734391985, now seen corresponding path program 1 times [2022-04-06 16:30:17,869 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 16:30:17,869 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1593564420] [2022-04-06 16:30:17,870 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 16:30:17,871 INFO L85 PathProgramCache]: Analyzing trace with hash -1734391985, now seen corresponding path program 2 times [2022-04-06 16:30:17,871 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 16:30:17,871 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [951833255] [2022-04-06 16:30:17,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 16:30:17,872 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 16:30:17,901 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 16:30:17,901 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1313850367] [2022-04-06 16:30:17,901 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 16:30:17,902 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 16:30:17,902 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 16:30:17,904 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 16:30:17,905 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-04-06 16:30:17,952 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-04-06 16:30:17,952 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 16:30:17,953 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 5 conjunts are in the unsatisfiable core [2022-04-06 16:30:17,958 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 16:30:18,090 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-04-06 16:30:18,090 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-04-06 16:30:18,091 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 16:30:18,091 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [951833255] [2022-04-06 16:30:18,091 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 16:30:18,091 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1313850367] [2022-04-06 16:30:18,092 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1313850367] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 16:30:18,093 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 16:30:18,094 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-04-06 16:30:18,095 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 16:30:18,096 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1593564420] [2022-04-06 16:30:18,096 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1593564420] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 16:30:18,096 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 16:30:18,096 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-04-06 16:30:18,096 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [526966110] [2022-04-06 16:30:18,096 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 16:30:18,097 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-04-06 16:30:18,097 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 16:30:18,097 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-04-06 16:30:18,097 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-04-06 16:30:18,097 INFO L87 Difference]: Start difference. First operand 34 states and 45 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 3 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) [2022-04-06 16:30:18,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 16:30:18,118 INFO L93 Difference]: Finished difference Result 44 states and 56 transitions. [2022-04-06 16:30:18,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-04-06 16:30:18,118 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 3 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) Word has length 33 [2022-04-06 16:30:18,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 16:30:18,120 INFO L225 Difference]: With dead ends: 44 [2022-04-06 16:30:18,120 INFO L226 Difference]: Without dead ends: 36 [2022-04-06 16:30:18,121 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-04-06 16:30:18,122 INFO L913 BasicCegarLoop]: 43 mSDtfsCounter, 0 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 110 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 16:30:18,124 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 110 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 16:30:18,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2022-04-06 16:30:18,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2022-04-06 16:30:18,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 20 states have (on average 1.25) internal successors, (25), 21 states have internal predecessors, (25), 12 states have call successors, (12), 4 states have call predecessors, (12), 3 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-04-06 16:30:18,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 47 transitions. [2022-04-06 16:30:18,131 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 47 transitions. Word has length 33 [2022-04-06 16:30:18,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 16:30:18,132 INFO L478 AbstractCegarLoop]: Abstraction has 36 states and 47 transitions. [2022-04-06 16:30:18,132 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 3 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) [2022-04-06 16:30:18,133 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 47 transitions. [2022-04-06 16:30:18,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-04-06 16:30:18,133 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 16:30:18,133 INFO L499 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 16:30:18,154 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-04-06 16:30:18,354 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 16:30:18,356 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 16:30:18,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 16:30:18,357 INFO L85 PathProgramCache]: Analyzing trace with hash 2066454233, now seen corresponding path program 1 times [2022-04-06 16:30:18,357 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 16:30:18,357 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1131940883] [2022-04-06 16:30:18,357 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 16:30:18,357 INFO L85 PathProgramCache]: Analyzing trace with hash 2066454233, now seen corresponding path program 2 times [2022-04-06 16:30:18,357 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 16:30:18,358 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [963837450] [2022-04-06 16:30:18,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 16:30:18,358 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 16:30:18,377 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 16:30:18,377 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [901723208] [2022-04-06 16:30:18,377 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 16:30:18,377 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 16:30:18,377 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 16:30:18,379 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 16:30:18,380 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-04-06 16:30:18,428 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 16:30:18,428 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 16:30:18,429 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 7 conjunts are in the unsatisfiable core [2022-04-06 16:30:18,432 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 16:30:18,501 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-04-06 16:30:18,501 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 16:30:18,592 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-04-06 16:30:18,593 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 16:30:18,593 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [963837450] [2022-04-06 16:30:18,593 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 16:30:18,593 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [901723208] [2022-04-06 16:30:18,593 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [901723208] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 16:30:18,593 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 16:30:18,593 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2022-04-06 16:30:18,593 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 16:30:18,594 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1131940883] [2022-04-06 16:30:18,594 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1131940883] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 16:30:18,594 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 16:30:18,594 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-04-06 16:30:18,594 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [634612616] [2022-04-06 16:30:18,594 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 16:30:18,594 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-04-06 16:30:18,594 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 16:30:18,595 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-04-06 16:30:18,595 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-04-06 16:30:18,595 INFO L87 Difference]: Start difference. First operand 36 states and 47 transitions. Second operand has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2022-04-06 16:30:18,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 16:30:18,667 INFO L93 Difference]: Finished difference Result 53 states and 71 transitions. [2022-04-06 16:30:18,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-04-06 16:30:18,668 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) Word has length 34 [2022-04-06 16:30:18,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 16:30:18,668 INFO L225 Difference]: With dead ends: 53 [2022-04-06 16:30:18,668 INFO L226 Difference]: Without dead ends: 45 [2022-04-06 16:30:18,669 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 61 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2022-04-06 16:30:18,669 INFO L913 BasicCegarLoop]: 39 mSDtfsCounter, 28 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 135 SdHoareTripleChecker+Invalid, 85 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 16:30:18,670 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 135 Invalid, 85 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 16:30:18,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2022-04-06 16:30:18,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 37. [2022-04-06 16:30:18,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 21 states have (on average 1.2380952380952381) internal successors, (26), 22 states have internal predecessors, (26), 12 states have call successors, (12), 4 states have call predecessors, (12), 3 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-04-06 16:30:18,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 48 transitions. [2022-04-06 16:30:18,677 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 48 transitions. Word has length 34 [2022-04-06 16:30:18,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 16:30:18,678 INFO L478 AbstractCegarLoop]: Abstraction has 37 states and 48 transitions. [2022-04-06 16:30:18,678 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2022-04-06 16:30:18,678 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 48 transitions. [2022-04-06 16:30:18,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-04-06 16:30:18,678 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 16:30:18,678 INFO L499 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 16:30:18,714 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-04-06 16:30:18,879 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2022-04-06 16:30:18,879 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 16:30:18,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 16:30:18,880 INFO L85 PathProgramCache]: Analyzing trace with hash 1678606280, now seen corresponding path program 1 times [2022-04-06 16:30:18,880 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 16:30:18,880 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1792580949] [2022-04-06 16:30:18,880 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 16:30:18,880 INFO L85 PathProgramCache]: Analyzing trace with hash 1678606280, now seen corresponding path program 2 times [2022-04-06 16:30:18,881 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 16:30:18,881 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [615560054] [2022-04-06 16:30:18,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 16:30:18,881 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 16:30:18,890 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 16:30:18,891 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1754397079] [2022-04-06 16:30:18,891 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 16:30:18,891 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 16:30:18,891 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 16:30:18,892 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 16:30:18,906 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-04-06 16:30:18,938 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-04-06 16:30:18,938 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 16:30:18,939 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 8 conjunts are in the unsatisfiable core [2022-04-06 16:30:18,940 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 16:30:19,015 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-04-06 16:30:19,015 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-04-06 16:30:19,015 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 16:30:19,018 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [615560054] [2022-04-06 16:30:19,018 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 16:30:19,018 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1754397079] [2022-04-06 16:30:19,019 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1754397079] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 16:30:19,019 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 16:30:19,019 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-06 16:30:19,019 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 16:30:19,019 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1792580949] [2022-04-06 16:30:19,020 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1792580949] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 16:30:19,020 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 16:30:19,020 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-06 16:30:19,020 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [913835242] [2022-04-06 16:30:19,020 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 16:30:19,020 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-04-06 16:30:19,020 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 16:30:19,021 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-04-06 16:30:19,021 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-04-06 16:30:19,021 INFO L87 Difference]: Start difference. First operand 37 states and 48 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2022-04-06 16:30:19,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 16:30:19,058 INFO L93 Difference]: Finished difference Result 51 states and 67 transitions. [2022-04-06 16:30:19,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-04-06 16:30:19,059 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) Word has length 36 [2022-04-06 16:30:19,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 16:30:19,060 INFO L225 Difference]: With dead ends: 51 [2022-04-06 16:30:19,060 INFO L226 Difference]: Without dead ends: 49 [2022-04-06 16:30:19,060 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-04-06 16:30:19,060 INFO L913 BasicCegarLoop]: 43 mSDtfsCounter, 7 mSDsluCounter, 107 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 150 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 16:30:19,061 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 150 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 16:30:19,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2022-04-06 16:30:19,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 44. [2022-04-06 16:30:19,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 26 states have (on average 1.2307692307692308) internal successors, (32), 28 states have internal predecessors, (32), 13 states have call successors, (13), 5 states have call predecessors, (13), 4 states have return successors, (11), 10 states have call predecessors, (11), 11 states have call successors, (11) [2022-04-06 16:30:19,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 56 transitions. [2022-04-06 16:30:19,067 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 56 transitions. Word has length 36 [2022-04-06 16:30:19,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 16:30:19,067 INFO L478 AbstractCegarLoop]: Abstraction has 44 states and 56 transitions. [2022-04-06 16:30:19,068 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2022-04-06 16:30:19,068 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 56 transitions. [2022-04-06 16:30:19,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-04-06 16:30:19,068 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 16:30:19,068 INFO L499 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 16:30:19,086 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-04-06 16:30:19,269 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 16:30:19,269 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 16:30:19,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 16:30:19,270 INFO L85 PathProgramCache]: Analyzing trace with hash -2124209112, now seen corresponding path program 1 times [2022-04-06 16:30:19,270 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 16:30:19,270 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1801609622] [2022-04-06 16:30:19,270 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 16:30:19,270 INFO L85 PathProgramCache]: Analyzing trace with hash -2124209112, now seen corresponding path program 2 times [2022-04-06 16:30:19,270 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 16:30:19,270 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [472306915] [2022-04-06 16:30:19,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 16:30:19,270 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 16:30:19,277 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 16:30:19,277 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1491290800] [2022-04-06 16:30:19,277 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 16:30:19,277 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 16:30:19,278 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 16:30:19,284 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 16:30:19,285 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-04-06 16:30:19,322 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 16:30:19,322 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 16:30:19,323 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 7 conjunts are in the unsatisfiable core [2022-04-06 16:30:19,324 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 16:30:19,411 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-04-06 16:30:19,411 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-04-06 16:30:19,411 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 16:30:19,411 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [472306915] [2022-04-06 16:30:19,411 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 16:30:19,411 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1491290800] [2022-04-06 16:30:19,411 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1491290800] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 16:30:19,411 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 16:30:19,411 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-06 16:30:19,412 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 16:30:19,412 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1801609622] [2022-04-06 16:30:19,412 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1801609622] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 16:30:19,412 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 16:30:19,412 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-06 16:30:19,412 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1849957145] [2022-04-06 16:30:19,412 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 16:30:19,412 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-04-06 16:30:19,412 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 16:30:19,412 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-04-06 16:30:19,413 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-04-06 16:30:19,413 INFO L87 Difference]: Start difference. First operand 44 states and 56 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 3 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) [2022-04-06 16:30:19,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 16:30:19,442 INFO L93 Difference]: Finished difference Result 72 states and 94 transitions. [2022-04-06 16:30:19,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-04-06 16:30:19,442 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 3 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) Word has length 39 [2022-04-06 16:30:19,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 16:30:19,445 INFO L225 Difference]: With dead ends: 72 [2022-04-06 16:30:19,445 INFO L226 Difference]: Without dead ends: 46 [2022-04-06 16:30:19,445 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-04-06 16:30:19,446 INFO L913 BasicCegarLoop]: 42 mSDtfsCounter, 6 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 133 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 16:30:19,446 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 133 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 16:30:19,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2022-04-06 16:30:19,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2022-04-06 16:30:19,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 28 states have (on average 1.2142857142857142) internal successors, (34), 30 states have internal predecessors, (34), 13 states have call successors, (13), 5 states have call predecessors, (13), 4 states have return successors, (11), 10 states have call predecessors, (11), 11 states have call successors, (11) [2022-04-06 16:30:19,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 58 transitions. [2022-04-06 16:30:19,452 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 58 transitions. Word has length 39 [2022-04-06 16:30:19,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 16:30:19,452 INFO L478 AbstractCegarLoop]: Abstraction has 46 states and 58 transitions. [2022-04-06 16:30:19,452 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 3 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) [2022-04-06 16:30:19,452 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 58 transitions. [2022-04-06 16:30:19,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-04-06 16:30:19,453 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 16:30:19,453 INFO L499 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 16:30:19,472 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-04-06 16:30:19,653 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 16:30:19,653 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 16:30:19,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 16:30:19,654 INFO L85 PathProgramCache]: Analyzing trace with hash 1052701339, now seen corresponding path program 1 times [2022-04-06 16:30:19,654 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 16:30:19,654 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [930423688] [2022-04-06 16:30:19,654 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 16:30:19,654 INFO L85 PathProgramCache]: Analyzing trace with hash 1052701339, now seen corresponding path program 2 times [2022-04-06 16:30:19,654 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 16:30:19,654 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1103260571] [2022-04-06 16:30:19,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 16:30:19,655 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 16:30:19,663 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 16:30:19,663 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [663148980] [2022-04-06 16:30:19,664 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 16:30:19,664 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 16:30:19,664 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 16:30:19,665 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 16:30:19,666 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-04-06 16:30:19,707 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 16:30:19,708 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 16:30:19,709 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 14 conjunts are in the unsatisfiable core [2022-04-06 16:30:19,710 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 16:30:19,886 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-04-06 16:30:19,886 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 16:30:19,988 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-04-06 16:30:19,989 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 16:30:19,989 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1103260571] [2022-04-06 16:30:19,989 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 16:30:19,989 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [663148980] [2022-04-06 16:30:19,989 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [663148980] provided 1 perfect and 1 imperfect interpolant sequences [2022-04-06 16:30:19,989 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-04-06 16:30:19,989 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8] total 9 [2022-04-06 16:30:19,989 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 16:30:19,990 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [930423688] [2022-04-06 16:30:19,990 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [930423688] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 16:30:19,990 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 16:30:19,990 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-06 16:30:19,990 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [741254580] [2022-04-06 16:30:19,990 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 16:30:19,990 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-04-06 16:30:19,990 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 16:30:19,990 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-04-06 16:30:19,990 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2022-04-06 16:30:19,991 INFO L87 Difference]: Start difference. First operand 46 states and 58 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-04-06 16:30:20,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 16:30:20,039 INFO L93 Difference]: Finished difference Result 61 states and 79 transitions. [2022-04-06 16:30:20,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-04-06 16:30:20,040 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 41 [2022-04-06 16:30:20,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 16:30:20,041 INFO L225 Difference]: With dead ends: 61 [2022-04-06 16:30:20,041 INFO L226 Difference]: Without dead ends: 59 [2022-04-06 16:30:20,041 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 73 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2022-04-06 16:30:20,042 INFO L913 BasicCegarLoop]: 47 mSDtfsCounter, 8 mSDsluCounter, 110 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 157 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 16:30:20,042 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 157 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 16:30:20,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2022-04-06 16:30:20,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 58. [2022-04-06 16:30:20,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 34 states have (on average 1.2352941176470589) internal successors, (42), 37 states have internal predecessors, (42), 18 states have call successors, (18), 6 states have call predecessors, (18), 5 states have return successors, (16), 14 states have call predecessors, (16), 16 states have call successors, (16) [2022-04-06 16:30:20,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 76 transitions. [2022-04-06 16:30:20,052 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 76 transitions. Word has length 41 [2022-04-06 16:30:20,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 16:30:20,053 INFO L478 AbstractCegarLoop]: Abstraction has 58 states and 76 transitions. [2022-04-06 16:30:20,053 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-04-06 16:30:20,053 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 76 transitions. [2022-04-06 16:30:20,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-04-06 16:30:20,054 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 16:30:20,054 INFO L499 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 16:30:20,085 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-04-06 16:30:20,271 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 16:30:20,271 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 16:30:20,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 16:30:20,272 INFO L85 PathProgramCache]: Analyzing trace with hash 1531994984, now seen corresponding path program 1 times [2022-04-06 16:30:20,272 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 16:30:20,272 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1616375951] [2022-04-06 16:30:20,272 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 16:30:20,272 INFO L85 PathProgramCache]: Analyzing trace with hash 1531994984, now seen corresponding path program 2 times [2022-04-06 16:30:20,273 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 16:30:20,273 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1063852821] [2022-04-06 16:30:20,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 16:30:20,273 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 16:30:20,279 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 16:30:20,279 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [810706184] [2022-04-06 16:30:20,280 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 16:30:20,280 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 16:30:20,280 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 16:30:20,285 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 16:30:20,286 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-04-06 16:30:20,324 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 16:30:20,324 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 16:30:20,325 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 14 conjunts are in the unsatisfiable core [2022-04-06 16:30:20,326 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 16:30:20,536 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-04-06 16:30:20,537 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 16:30:20,613 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-04-06 16:30:20,613 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 16:30:20,613 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1063852821] [2022-04-06 16:30:20,613 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 16:30:20,613 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [810706184] [2022-04-06 16:30:20,614 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [810706184] provided 1 perfect and 1 imperfect interpolant sequences [2022-04-06 16:30:20,614 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-04-06 16:30:20,614 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8] total 9 [2022-04-06 16:30:20,614 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 16:30:20,614 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1616375951] [2022-04-06 16:30:20,614 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1616375951] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 16:30:20,614 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 16:30:20,614 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-06 16:30:20,614 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [498346127] [2022-04-06 16:30:20,614 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 16:30:20,615 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-04-06 16:30:20,615 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 16:30:20,615 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-04-06 16:30:20,615 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2022-04-06 16:30:20,615 INFO L87 Difference]: Start difference. First operand 58 states and 76 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-04-06 16:30:20,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 16:30:20,667 INFO L93 Difference]: Finished difference Result 65 states and 82 transitions. [2022-04-06 16:30:20,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-04-06 16:30:20,667 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 46 [2022-04-06 16:30:20,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 16:30:20,668 INFO L225 Difference]: With dead ends: 65 [2022-04-06 16:30:20,668 INFO L226 Difference]: Without dead ends: 63 [2022-04-06 16:30:20,668 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 83 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2022-04-06 16:30:20,669 INFO L913 BasicCegarLoop]: 45 mSDtfsCounter, 8 mSDsluCounter, 103 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 148 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 16:30:20,669 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 148 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 16:30:20,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2022-04-06 16:30:20,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 62. [2022-04-06 16:30:20,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 37 states have (on average 1.2162162162162162) internal successors, (45), 40 states have internal predecessors, (45), 18 states have call successors, (18), 7 states have call predecessors, (18), 6 states have return successors, (16), 14 states have call predecessors, (16), 16 states have call successors, (16) [2022-04-06 16:30:20,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 79 transitions. [2022-04-06 16:30:20,690 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 79 transitions. Word has length 46 [2022-04-06 16:30:20,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 16:30:20,690 INFO L478 AbstractCegarLoop]: Abstraction has 62 states and 79 transitions. [2022-04-06 16:30:20,690 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-04-06 16:30:20,690 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 79 transitions. [2022-04-06 16:30:20,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-04-06 16:30:20,691 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 16:30:20,691 INFO L499 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 16:30:20,709 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-04-06 16:30:20,907 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 16:30:20,908 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 16:30:20,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 16:30:20,908 INFO L85 PathProgramCache]: Analyzing trace with hash -300711301, now seen corresponding path program 1 times [2022-04-06 16:30:20,908 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 16:30:20,908 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [26604319] [2022-04-06 16:30:20,909 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 16:30:20,909 INFO L85 PathProgramCache]: Analyzing trace with hash -300711301, now seen corresponding path program 2 times [2022-04-06 16:30:20,909 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 16:30:20,909 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1464169527] [2022-04-06 16:30:20,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 16:30:20,909 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 16:30:20,916 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 16:30:20,916 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2066311196] [2022-04-06 16:30:20,916 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 16:30:20,916 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 16:30:20,916 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 16:30:20,921 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 16:30:20,922 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-04-06 16:30:20,960 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 16:30:20,960 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 16:30:20,961 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 23 conjunts are in the unsatisfiable core [2022-04-06 16:30:20,962 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 16:30:21,133 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 10 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-04-06 16:30:21,134 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 16:30:21,218 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 16:30:21,218 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1464169527] [2022-04-06 16:30:21,218 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 16:30:21,219 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2066311196] [2022-04-06 16:30:21,219 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2066311196] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 16:30:21,219 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-04-06 16:30:21,219 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2022-04-06 16:30:21,219 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 16:30:21,219 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [26604319] [2022-04-06 16:30:21,219 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [26604319] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 16:30:21,219 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 16:30:21,219 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-04-06 16:30:21,219 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [95651075] [2022-04-06 16:30:21,219 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 16:30:21,220 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-04-06 16:30:21,220 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 16:30:21,220 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-04-06 16:30:21,220 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2022-04-06 16:30:21,220 INFO L87 Difference]: Start difference. First operand 62 states and 79 transitions. Second operand has 7 states, 7 states have (on average 3.0) internal successors, (21), 6 states have internal predecessors, (21), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-04-06 16:30:21,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 16:30:21,314 INFO L93 Difference]: Finished difference Result 69 states and 85 transitions. [2022-04-06 16:30:21,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-04-06 16:30:21,315 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.0) internal successors, (21), 6 states have internal predecessors, (21), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 51 [2022-04-06 16:30:21,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 16:30:21,315 INFO L225 Difference]: With dead ends: 69 [2022-04-06 16:30:21,315 INFO L226 Difference]: Without dead ends: 67 [2022-04-06 16:30:21,316 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 47 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2022-04-06 16:30:21,316 INFO L913 BasicCegarLoop]: 35 mSDtfsCounter, 12 mSDsluCounter, 125 mSDsCounter, 0 mSdLazyCounter, 126 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 160 SdHoareTripleChecker+Invalid, 128 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 126 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 16:30:21,316 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 160 Invalid, 128 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 126 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 16:30:21,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2022-04-06 16:30:21,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 66. [2022-04-06 16:30:21,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 40 states have (on average 1.2) internal successors, (48), 43 states have internal predecessors, (48), 18 states have call successors, (18), 8 states have call predecessors, (18), 7 states have return successors, (16), 14 states have call predecessors, (16), 16 states have call successors, (16) [2022-04-06 16:30:21,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 82 transitions. [2022-04-06 16:30:21,324 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 82 transitions. Word has length 51 [2022-04-06 16:30:21,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 16:30:21,324 INFO L478 AbstractCegarLoop]: Abstraction has 66 states and 82 transitions. [2022-04-06 16:30:21,324 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.0) internal successors, (21), 6 states have internal predecessors, (21), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-04-06 16:30:21,324 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 82 transitions. [2022-04-06 16:30:21,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-04-06 16:30:21,325 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 16:30:21,325 INFO L499 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 16:30:21,343 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-04-06 16:30:21,541 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 16:30:21,542 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 16:30:21,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 16:30:21,542 INFO L85 PathProgramCache]: Analyzing trace with hash -2044027516, now seen corresponding path program 1 times [2022-04-06 16:30:21,542 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 16:30:21,542 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [696235018] [2022-04-06 16:30:21,542 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 16:30:21,542 INFO L85 PathProgramCache]: Analyzing trace with hash -2044027516, now seen corresponding path program 2 times [2022-04-06 16:30:21,543 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 16:30:21,543 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1630970007] [2022-04-06 16:30:21,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 16:30:21,543 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 16:30:21,549 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 16:30:21,549 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [310890728] [2022-04-06 16:30:21,550 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 16:30:21,550 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 16:30:21,550 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 16:30:21,552 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 16:30:21,553 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-04-06 16:30:21,603 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 16:30:21,603 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 16:30:21,604 INFO L263 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 11 conjunts are in the unsatisfiable core [2022-04-06 16:30:21,605 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 16:30:21,705 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2022-04-06 16:30:21,705 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 16:30:21,802 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2022-04-06 16:30:21,802 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 16:30:21,802 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1630970007] [2022-04-06 16:30:21,802 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 16:30:21,802 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [310890728] [2022-04-06 16:30:21,802 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [310890728] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 16:30:21,803 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 16:30:21,803 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2022-04-06 16:30:21,803 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 16:30:21,803 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [696235018] [2022-04-06 16:30:21,803 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [696235018] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 16:30:21,803 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 16:30:21,803 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-04-06 16:30:21,803 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [140398794] [2022-04-06 16:30:21,803 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 16:30:21,803 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-04-06 16:30:21,803 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 16:30:21,804 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-04-06 16:30:21,804 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-04-06 16:30:21,804 INFO L87 Difference]: Start difference. First operand 66 states and 82 transitions. Second operand has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 states have internal predecessors, (21), 3 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2022-04-06 16:30:21,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 16:30:21,866 INFO L93 Difference]: Finished difference Result 96 states and 131 transitions. [2022-04-06 16:30:21,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-04-06 16:30:21,867 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 states have internal predecessors, (21), 3 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 59 [2022-04-06 16:30:21,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 16:30:21,868 INFO L225 Difference]: With dead ends: 96 [2022-04-06 16:30:21,868 INFO L226 Difference]: Without dead ends: 94 [2022-04-06 16:30:21,868 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 110 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-04-06 16:30:21,869 INFO L913 BasicCegarLoop]: 53 mSDtfsCounter, 9 mSDsluCounter, 155 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 208 SdHoareTripleChecker+Invalid, 89 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 88 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 16:30:21,869 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 208 Invalid, 89 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 88 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 16:30:21,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2022-04-06 16:30:21,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 84. [2022-04-06 16:30:21,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 49 states have (on average 1.2448979591836735) internal successors, (61), 52 states have internal predecessors, (61), 26 states have call successors, (26), 9 states have call predecessors, (26), 8 states have return successors, (24), 22 states have call predecessors, (24), 24 states have call successors, (24) [2022-04-06 16:30:21,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 111 transitions. [2022-04-06 16:30:21,880 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 111 transitions. Word has length 59 [2022-04-06 16:30:21,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 16:30:21,880 INFO L478 AbstractCegarLoop]: Abstraction has 84 states and 111 transitions. [2022-04-06 16:30:21,880 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 states have internal predecessors, (21), 3 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2022-04-06 16:30:21,880 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 111 transitions. [2022-04-06 16:30:21,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-04-06 16:30:21,881 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 16:30:21,881 INFO L499 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 16:30:21,901 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-04-06 16:30:22,095 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2022-04-06 16:30:22,096 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 16:30:22,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 16:30:22,096 INFO L85 PathProgramCache]: Analyzing trace with hash 35160305, now seen corresponding path program 1 times [2022-04-06 16:30:22,096 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 16:30:22,096 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [480076831] [2022-04-06 16:30:22,096 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 16:30:22,096 INFO L85 PathProgramCache]: Analyzing trace with hash 35160305, now seen corresponding path program 2 times [2022-04-06 16:30:22,097 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 16:30:22,097 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [56842745] [2022-04-06 16:30:22,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 16:30:22,097 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 16:30:22,104 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 16:30:22,104 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [797598802] [2022-04-06 16:30:22,104 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 16:30:22,104 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 16:30:22,104 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 16:30:22,107 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 16:30:22,108 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-04-06 16:30:22,153 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 16:30:22,153 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 16:30:22,154 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 9 conjunts are in the unsatisfiable core [2022-04-06 16:30:22,155 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 16:30:22,242 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2022-04-06 16:30:22,243 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 16:30:22,335 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2022-04-06 16:30:22,335 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 16:30:22,335 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [56842745] [2022-04-06 16:30:22,335 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 16:30:22,335 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [797598802] [2022-04-06 16:30:22,335 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [797598802] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 16:30:22,335 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 16:30:22,336 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2022-04-06 16:30:22,336 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 16:30:22,336 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [480076831] [2022-04-06 16:30:22,336 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [480076831] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 16:30:22,336 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 16:30:22,336 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-04-06 16:30:22,336 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [346810804] [2022-04-06 16:30:22,336 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 16:30:22,337 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-04-06 16:30:22,337 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 16:30:22,337 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-04-06 16:30:22,337 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2022-04-06 16:30:22,337 INFO L87 Difference]: Start difference. First operand 84 states and 111 transitions. Second operand has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 5 states have internal predecessors, (22), 4 states have call successors, (11), 4 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 3 states have call successors, (9) [2022-04-06 16:30:22,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 16:30:22,399 INFO L93 Difference]: Finished difference Result 111 states and 135 transitions. [2022-04-06 16:30:22,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-04-06 16:30:22,400 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 5 states have internal predecessors, (22), 4 states have call successors, (11), 4 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 3 states have call successors, (9) Word has length 60 [2022-04-06 16:30:22,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 16:30:22,400 INFO L225 Difference]: With dead ends: 111 [2022-04-06 16:30:22,401 INFO L226 Difference]: Without dead ends: 103 [2022-04-06 16:30:22,401 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2022-04-06 16:30:22,401 INFO L913 BasicCegarLoop]: 46 mSDtfsCounter, 14 mSDsluCounter, 85 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 131 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 16:30:22,401 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 131 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 16:30:22,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2022-04-06 16:30:22,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 103. [2022-04-06 16:30:22,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 64 states have (on average 1.1875) internal successors, (76), 67 states have internal predecessors, (76), 26 states have call successors, (26), 13 states have call predecessors, (26), 12 states have return successors, (24), 22 states have call predecessors, (24), 24 states have call successors, (24) [2022-04-06 16:30:22,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 126 transitions. [2022-04-06 16:30:22,412 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 126 transitions. Word has length 60 [2022-04-06 16:30:22,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 16:30:22,412 INFO L478 AbstractCegarLoop]: Abstraction has 103 states and 126 transitions. [2022-04-06 16:30:22,412 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 5 states have internal predecessors, (22), 4 states have call successors, (11), 4 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 3 states have call successors, (9) [2022-04-06 16:30:22,412 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 126 transitions. [2022-04-06 16:30:22,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-04-06 16:30:22,413 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 16:30:22,413 INFO L499 BasicCegarLoop]: trace histogram [5, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 16:30:22,447 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-04-06 16:30:22,623 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-04-06 16:30:22,624 INFO L403 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 16:30:22,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 16:30:22,624 INFO L85 PathProgramCache]: Analyzing trace with hash 1088000375, now seen corresponding path program 1 times [2022-04-06 16:30:22,624 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 16:30:22,624 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1817404290] [2022-04-06 16:30:22,625 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 16:30:22,625 INFO L85 PathProgramCache]: Analyzing trace with hash 1088000375, now seen corresponding path program 2 times [2022-04-06 16:30:22,625 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 16:30:22,625 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [435560337] [2022-04-06 16:30:22,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 16:30:22,625 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 16:30:22,633 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 16:30:22,633 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1171142483] [2022-04-06 16:30:22,633 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 16:30:22,633 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 16:30:22,633 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 16:30:22,634 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) [2022-04-06 16:30:22,640 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-04-06 16:30:22,679 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 16:30:22,679 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 16:30:22,680 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 9 conjunts are in the unsatisfiable core [2022-04-06 16:30:22,682 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 16:30:22,780 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 8 proven. 12 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2022-04-06 16:30:22,781 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 16:30:22,897 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 8 proven. 12 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2022-04-06 16:30:22,897 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 16:30:22,897 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [435560337] [2022-04-06 16:30:22,897 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 16:30:22,897 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1171142483] [2022-04-06 16:30:22,897 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1171142483] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 16:30:22,897 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 16:30:22,897 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2022-04-06 16:30:22,897 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 16:30:22,898 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1817404290] [2022-04-06 16:30:22,898 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1817404290] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 16:30:22,898 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 16:30:22,898 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-04-06 16:30:22,898 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [156636518] [2022-04-06 16:30:22,898 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 16:30:22,898 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-04-06 16:30:22,898 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 16:30:22,898 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-04-06 16:30:22,898 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2022-04-06 16:30:22,899 INFO L87 Difference]: Start difference. First operand 103 states and 126 transitions. Second operand has 8 states, 8 states have (on average 3.25) internal successors, (26), 7 states have internal predecessors, (26), 5 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) [2022-04-06 16:30:23,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 16:30:23,080 INFO L93 Difference]: Finished difference Result 182 states and 256 transitions. [2022-04-06 16:30:23,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-04-06 16:30:23,080 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.25) internal successors, (26), 7 states have internal predecessors, (26), 5 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) Word has length 61 [2022-04-06 16:30:23,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 16:30:23,081 INFO L225 Difference]: With dead ends: 182 [2022-04-06 16:30:23,081 INFO L226 Difference]: Without dead ends: 174 [2022-04-06 16:30:23,082 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 113 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2022-04-06 16:30:23,082 INFO L913 BasicCegarLoop]: 71 mSDtfsCounter, 59 mSDsluCounter, 246 mSDsCounter, 0 mSdLazyCounter, 161 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 317 SdHoareTripleChecker+Invalid, 232 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 161 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 16:30:23,082 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [64 Valid, 317 Invalid, 232 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 161 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 16:30:23,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2022-04-06 16:30:23,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 146. [2022-04-06 16:30:23,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 90 states have (on average 1.2777777777777777) internal successors, (115), 94 states have internal predecessors, (115), 43 states have call successors, (43), 13 states have call predecessors, (43), 12 states have return successors, (41), 38 states have call predecessors, (41), 41 states have call successors, (41) [2022-04-06 16:30:23,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 199 transitions. [2022-04-06 16:30:23,097 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 199 transitions. Word has length 61 [2022-04-06 16:30:23,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 16:30:23,097 INFO L478 AbstractCegarLoop]: Abstraction has 146 states and 199 transitions. [2022-04-06 16:30:23,098 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.25) internal successors, (26), 7 states have internal predecessors, (26), 5 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) [2022-04-06 16:30:23,098 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 199 transitions. [2022-04-06 16:30:23,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-04-06 16:30:23,098 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 16:30:23,098 INFO L499 BasicCegarLoop]: trace histogram [5, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 16:30:23,117 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-04-06 16:30:23,311 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-04-06 16:30:23,311 INFO L403 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 16:30:23,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 16:30:23,312 INFO L85 PathProgramCache]: Analyzing trace with hash 1537891564, now seen corresponding path program 1 times [2022-04-06 16:30:23,312 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 16:30:23,312 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [637508345] [2022-04-06 16:30:23,312 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 16:30:23,312 INFO L85 PathProgramCache]: Analyzing trace with hash 1537891564, now seen corresponding path program 2 times [2022-04-06 16:30:23,312 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 16:30:23,312 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [472401654] [2022-04-06 16:30:23,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 16:30:23,312 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 16:30:23,319 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 16:30:23,319 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [443024872] [2022-04-06 16:30:23,319 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 16:30:23,319 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 16:30:23,319 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 16:30:23,321 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 16:30:23,322 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-04-06 16:30:23,361 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 16:30:23,361 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 16:30:23,362 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 9 conjunts are in the unsatisfiable core [2022-04-06 16:30:23,363 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 16:30:23,443 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 10 proven. 2 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2022-04-06 16:30:23,444 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 16:30:23,542 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 10 proven. 2 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2022-04-06 16:30:23,542 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 16:30:23,542 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [472401654] [2022-04-06 16:30:23,542 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 16:30:23,542 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [443024872] [2022-04-06 16:30:23,542 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [443024872] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 16:30:23,542 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 16:30:23,543 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2022-04-06 16:30:23,543 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 16:30:23,543 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [637508345] [2022-04-06 16:30:23,543 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [637508345] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 16:30:23,543 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 16:30:23,543 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-04-06 16:30:23,543 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1068328069] [2022-04-06 16:30:23,543 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 16:30:23,544 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-04-06 16:30:23,544 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 16:30:23,544 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-04-06 16:30:23,544 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2022-04-06 16:30:23,544 INFO L87 Difference]: Start difference. First operand 146 states and 199 transitions. Second operand has 6 states, 6 states have (on average 4.0) internal successors, (24), 5 states have internal predecessors, (24), 4 states have call successors, (11), 4 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 3 states have call successors, (9) [2022-04-06 16:30:23,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 16:30:23,608 INFO L93 Difference]: Finished difference Result 183 states and 250 transitions. [2022-04-06 16:30:23,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-04-06 16:30:23,608 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.0) internal successors, (24), 5 states have internal predecessors, (24), 4 states have call successors, (11), 4 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 3 states have call successors, (9) Word has length 62 [2022-04-06 16:30:23,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 16:30:23,611 INFO L225 Difference]: With dead ends: 183 [2022-04-06 16:30:23,612 INFO L226 Difference]: Without dead ends: 146 [2022-04-06 16:30:23,614 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2022-04-06 16:30:23,614 INFO L913 BasicCegarLoop]: 46 mSDtfsCounter, 10 mSDsluCounter, 93 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 139 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 16:30:23,614 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 139 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 16:30:23,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2022-04-06 16:30:23,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 146. [2022-04-06 16:30:23,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 90 states have (on average 1.2666666666666666) internal successors, (114), 94 states have internal predecessors, (114), 43 states have call successors, (43), 13 states have call predecessors, (43), 12 states have return successors, (41), 38 states have call predecessors, (41), 41 states have call successors, (41) [2022-04-06 16:30:23,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 198 transitions. [2022-04-06 16:30:23,635 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 198 transitions. Word has length 62 [2022-04-06 16:30:23,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 16:30:23,635 INFO L478 AbstractCegarLoop]: Abstraction has 146 states and 198 transitions. [2022-04-06 16:30:23,636 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.0) internal successors, (24), 5 states have internal predecessors, (24), 4 states have call successors, (11), 4 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 3 states have call successors, (9) [2022-04-06 16:30:23,636 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 198 transitions. [2022-04-06 16:30:23,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-04-06 16:30:23,636 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 16:30:23,636 INFO L499 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 16:30:23,665 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-04-06 16:30:23,847 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-04-06 16:30:23,847 INFO L403 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 16:30:23,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 16:30:23,848 INFO L85 PathProgramCache]: Analyzing trace with hash -385934262, now seen corresponding path program 1 times [2022-04-06 16:30:23,848 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 16:30:23,848 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [307427464] [2022-04-06 16:30:23,848 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 16:30:23,849 INFO L85 PathProgramCache]: Analyzing trace with hash -385934262, now seen corresponding path program 2 times [2022-04-06 16:30:23,849 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 16:30:23,849 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [132886030] [2022-04-06 16:30:23,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 16:30:23,849 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 16:30:23,855 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 16:30:23,855 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [658947584] [2022-04-06 16:30:23,855 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 16:30:23,855 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 16:30:23,855 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 16:30:23,856 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 16:30:23,857 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-04-06 16:30:23,904 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 16:30:23,904 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 16:30:23,905 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 11 conjunts are in the unsatisfiable core [2022-04-06 16:30:23,906 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 16:30:24,024 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 13 proven. 5 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2022-04-06 16:30:24,024 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 16:30:24,146 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 13 proven. 5 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2022-04-06 16:30:24,146 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 16:30:24,146 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [132886030] [2022-04-06 16:30:24,147 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 16:30:24,147 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [658947584] [2022-04-06 16:30:24,147 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [658947584] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 16:30:24,147 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 16:30:24,147 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2022-04-06 16:30:24,147 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 16:30:24,147 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [307427464] [2022-04-06 16:30:24,147 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [307427464] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 16:30:24,147 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 16:30:24,147 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-04-06 16:30:24,147 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1664020985] [2022-04-06 16:30:24,147 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 16:30:24,147 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-04-06 16:30:24,148 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 16:30:24,148 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-04-06 16:30:24,148 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2022-04-06 16:30:24,148 INFO L87 Difference]: Start difference. First operand 146 states and 198 transitions. Second operand has 7 states, 7 states have (on average 4.0) internal successors, (28), 6 states have internal predecessors, (28), 4 states have call successors, (11), 4 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 3 states have call successors, (9) [2022-04-06 16:30:24,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 16:30:24,209 INFO L93 Difference]: Finished difference Result 253 states and 351 transitions. [2022-04-06 16:30:24,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-04-06 16:30:24,210 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.0) internal successors, (28), 6 states have internal predecessors, (28), 4 states have call successors, (11), 4 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 3 states have call successors, (9) Word has length 66 [2022-04-06 16:30:24,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 16:30:24,211 INFO L225 Difference]: With dead ends: 253 [2022-04-06 16:30:24,211 INFO L226 Difference]: Without dead ends: 173 [2022-04-06 16:30:24,211 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 121 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=70, Invalid=112, Unknown=0, NotChecked=0, Total=182 [2022-04-06 16:30:24,212 INFO L913 BasicCegarLoop]: 50 mSDtfsCounter, 35 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 142 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 16:30:24,212 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 142 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 16:30:24,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2022-04-06 16:30:24,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 171. [2022-04-06 16:30:24,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 108 states have (on average 1.2314814814814814) internal successors, (133), 111 states have internal predecessors, (133), 46 states have call successors, (46), 17 states have call predecessors, (46), 16 states have return successors, (44), 42 states have call predecessors, (44), 44 states have call successors, (44) [2022-04-06 16:30:24,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 223 transitions. [2022-04-06 16:30:24,227 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 223 transitions. Word has length 66 [2022-04-06 16:30:24,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 16:30:24,227 INFO L478 AbstractCegarLoop]: Abstraction has 171 states and 223 transitions. [2022-04-06 16:30:24,227 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.0) internal successors, (28), 6 states have internal predecessors, (28), 4 states have call successors, (11), 4 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 3 states have call successors, (9) [2022-04-06 16:30:24,227 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 223 transitions. [2022-04-06 16:30:24,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-04-06 16:30:24,228 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 16:30:24,228 INFO L499 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 16:30:24,249 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-04-06 16:30:24,450 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-04-06 16:30:24,450 INFO L403 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 16:30:24,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 16:30:24,450 INFO L85 PathProgramCache]: Analyzing trace with hash 792554045, now seen corresponding path program 1 times [2022-04-06 16:30:24,451 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 16:30:24,451 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1540174606] [2022-04-06 16:30:24,451 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 16:30:24,451 INFO L85 PathProgramCache]: Analyzing trace with hash 792554045, now seen corresponding path program 2 times [2022-04-06 16:30:24,451 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 16:30:24,451 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1097691195] [2022-04-06 16:30:24,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 16:30:24,451 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 16:30:24,458 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 16:30:24,458 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1310397690] [2022-04-06 16:30:24,459 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 16:30:24,459 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 16:30:24,459 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 16:30:24,460 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 16:30:24,483 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-04-06 16:30:24,521 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 16:30:24,521 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 16:30:24,522 INFO L263 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 24 conjunts are in the unsatisfiable core [2022-04-06 16:30:24,523 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 16:30:24,705 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 15 proven. 14 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2022-04-06 16:30:24,705 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 16:30:24,873 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 22 proven. 7 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2022-04-06 16:30:24,873 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 16:30:24,873 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1097691195] [2022-04-06 16:30:24,873 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 16:30:24,873 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1310397690] [2022-04-06 16:30:24,873 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1310397690] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 16:30:24,873 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 16:30:24,873 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 13 [2022-04-06 16:30:24,874 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 16:30:24,874 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1540174606] [2022-04-06 16:30:24,874 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1540174606] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 16:30:24,874 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 16:30:24,874 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-04-06 16:30:24,874 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [714447465] [2022-04-06 16:30:24,874 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 16:30:24,874 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-04-06 16:30:24,874 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 16:30:24,874 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-04-06 16:30:24,875 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2022-04-06 16:30:24,875 INFO L87 Difference]: Start difference. First operand 171 states and 223 transitions. Second operand has 10 states, 10 states have (on average 2.8) internal successors, (28), 9 states have internal predecessors, (28), 5 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 5 states have call predecessors, (10), 5 states have call successors, (10) [2022-04-06 16:30:25,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 16:30:25,068 INFO L93 Difference]: Finished difference Result 195 states and 259 transitions. [2022-04-06 16:30:25,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-04-06 16:30:25,068 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.8) internal successors, (28), 9 states have internal predecessors, (28), 5 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 5 states have call predecessors, (10), 5 states have call successors, (10) Word has length 68 [2022-04-06 16:30:25,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 16:30:25,070 INFO L225 Difference]: With dead ends: 195 [2022-04-06 16:30:25,070 INFO L226 Difference]: Without dead ends: 193 [2022-04-06 16:30:25,070 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 123 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=218, Unknown=0, NotChecked=0, Total=272 [2022-04-06 16:30:25,070 INFO L913 BasicCegarLoop]: 47 mSDtfsCounter, 23 mSDsluCounter, 188 mSDsCounter, 0 mSdLazyCounter, 237 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 235 SdHoareTripleChecker+Invalid, 245 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 237 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 16:30:25,071 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 235 Invalid, 245 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 237 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 16:30:25,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2022-04-06 16:30:25,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 190. [2022-04-06 16:30:25,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 190 states, 117 states have (on average 1.2478632478632479) internal successors, (146), 121 states have internal predecessors, (146), 55 states have call successors, (55), 18 states have call predecessors, (55), 17 states have return successors, (53), 50 states have call predecessors, (53), 53 states have call successors, (53) [2022-04-06 16:30:25,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 254 transitions. [2022-04-06 16:30:25,091 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 254 transitions. Word has length 68 [2022-04-06 16:30:25,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 16:30:25,091 INFO L478 AbstractCegarLoop]: Abstraction has 190 states and 254 transitions. [2022-04-06 16:30:25,091 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.8) internal successors, (28), 9 states have internal predecessors, (28), 5 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 5 states have call predecessors, (10), 5 states have call successors, (10) [2022-04-06 16:30:25,091 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 254 transitions. [2022-04-06 16:30:25,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-04-06 16:30:25,092 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 16:30:25,092 INFO L499 BasicCegarLoop]: trace histogram [7, 6, 6, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 16:30:25,117 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-04-06 16:30:25,307 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-04-06 16:30:25,308 INFO L403 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 16:30:25,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 16:30:25,308 INFO L85 PathProgramCache]: Analyzing trace with hash 783638790, now seen corresponding path program 3 times [2022-04-06 16:30:25,308 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 16:30:25,308 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [688040066] [2022-04-06 16:30:25,308 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 16:30:25,309 INFO L85 PathProgramCache]: Analyzing trace with hash 783638790, now seen corresponding path program 4 times [2022-04-06 16:30:25,309 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 16:30:25,309 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1217929717] [2022-04-06 16:30:25,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 16:30:25,309 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 16:30:25,324 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 16:30:25,324 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [472423854] [2022-04-06 16:30:25,324 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 16:30:25,324 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 16:30:25,324 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 16:30:25,325 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 16:30:25,332 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-04-06 16:30:25,379 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 16:30:25,380 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 16:30:25,380 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 31 conjunts are in the unsatisfiable core [2022-04-06 16:30:25,382 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 16:30:25,746 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 12 proven. 17 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2022-04-06 16:30:25,746 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 16:30:25,882 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 16:30:25,883 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1217929717] [2022-04-06 16:30:25,883 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 16:30:25,883 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [472423854] [2022-04-06 16:30:25,883 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [472423854] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 16:30:25,883 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-04-06 16:30:25,883 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2022-04-06 16:30:25,883 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 16:30:25,883 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [688040066] [2022-04-06 16:30:25,883 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [688040066] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 16:30:25,884 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 16:30:25,884 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-04-06 16:30:25,885 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1875601453] [2022-04-06 16:30:25,885 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 16:30:25,885 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-04-06 16:30:25,885 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 16:30:25,885 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-04-06 16:30:25,885 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2022-04-06 16:30:25,885 INFO L87 Difference]: Start difference. First operand 190 states and 254 transitions. Second operand has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 9 states have internal predecessors, (28), 5 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 5 states have call predecessors, (11), 5 states have call successors, (11) [2022-04-06 16:30:26,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 16:30:26,087 INFO L93 Difference]: Finished difference Result 199 states and 262 transitions. [2022-04-06 16:30:26,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-04-06 16:30:26,088 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 9 states have internal predecessors, (28), 5 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 5 states have call predecessors, (11), 5 states have call successors, (11) Word has length 73 [2022-04-06 16:30:26,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 16:30:26,089 INFO L225 Difference]: With dead ends: 199 [2022-04-06 16:30:26,089 INFO L226 Difference]: Without dead ends: 197 [2022-04-06 16:30:26,089 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 80 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2022-04-06 16:30:26,089 INFO L913 BasicCegarLoop]: 51 mSDtfsCounter, 49 mSDsluCounter, 216 mSDsCounter, 0 mSdLazyCounter, 273 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 267 SdHoareTripleChecker+Invalid, 299 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 273 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 16:30:26,090 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [60 Valid, 267 Invalid, 299 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 273 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 16:30:26,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2022-04-06 16:30:26,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 194. [2022-04-06 16:30:26,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 194 states, 120 states have (on average 1.2416666666666667) internal successors, (149), 124 states have internal predecessors, (149), 55 states have call successors, (55), 19 states have call predecessors, (55), 18 states have return successors, (53), 50 states have call predecessors, (53), 53 states have call successors, (53) [2022-04-06 16:30:26,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 257 transitions. [2022-04-06 16:30:26,121 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 257 transitions. Word has length 73 [2022-04-06 16:30:26,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 16:30:26,121 INFO L478 AbstractCegarLoop]: Abstraction has 194 states and 257 transitions. [2022-04-06 16:30:26,121 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 9 states have internal predecessors, (28), 5 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 5 states have call predecessors, (11), 5 states have call successors, (11) [2022-04-06 16:30:26,121 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 257 transitions. [2022-04-06 16:30:26,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2022-04-06 16:30:26,122 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 16:30:26,122 INFO L499 BasicCegarLoop]: trace histogram [8, 7, 7, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 16:30:26,142 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-04-06 16:30:26,335 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 16:30:26,335 INFO L403 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 16:30:26,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 16:30:26,336 INFO L85 PathProgramCache]: Analyzing trace with hash 1625446301, now seen corresponding path program 5 times [2022-04-06 16:30:26,336 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 16:30:26,336 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1419983864] [2022-04-06 16:30:26,336 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 16:30:26,336 INFO L85 PathProgramCache]: Analyzing trace with hash 1625446301, now seen corresponding path program 6 times [2022-04-06 16:30:26,336 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 16:30:26,336 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [514115983] [2022-04-06 16:30:26,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 16:30:26,337 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 16:30:26,343 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 16:30:26,343 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1316446454] [2022-04-06 16:30:26,343 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 16:30:26,343 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 16:30:26,343 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 16:30:26,344 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 16:30:26,351 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-04-06 16:30:26,398 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-04-06 16:30:26,398 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 16:30:26,399 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 45 conjunts are in the unsatisfiable core [2022-04-06 16:30:26,401 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 16:30:27,308 INFO L134 CoverageAnalysis]: Checked inductivity of 131 backedges. 31 proven. 19 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2022-04-06 16:30:27,308 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 16:30:27,395 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 16:30:27,395 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [514115983] [2022-04-06 16:30:27,395 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 16:30:27,396 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1316446454] [2022-04-06 16:30:27,396 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1316446454] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 16:30:27,396 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-04-06 16:30:27,396 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2022-04-06 16:30:27,396 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 16:30:27,396 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1419983864] [2022-04-06 16:30:27,396 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1419983864] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 16:30:27,396 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 16:30:27,396 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-04-06 16:30:27,396 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1931901980] [2022-04-06 16:30:27,396 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 16:30:27,396 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-04-06 16:30:27,397 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 16:30:27,397 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-04-06 16:30:27,397 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2022-04-06 16:30:27,397 INFO L87 Difference]: Start difference. First operand 194 states and 257 transitions. Second operand has 13 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 11 states have internal predecessors, (31), 5 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (12), 5 states have call predecessors, (12), 5 states have call successors, (12) [2022-04-06 16:30:28,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 16:30:28,197 INFO L93 Difference]: Finished difference Result 203 states and 265 transitions. [2022-04-06 16:30:28,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-04-06 16:30:28,197 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 11 states have internal predecessors, (31), 5 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (12), 5 states have call predecessors, (12), 5 states have call successors, (12) Word has length 78 [2022-04-06 16:30:28,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 16:30:28,198 INFO L225 Difference]: With dead ends: 203 [2022-04-06 16:30:28,199 INFO L226 Difference]: Without dead ends: 201 [2022-04-06 16:30:28,199 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 67 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=62, Invalid=318, Unknown=0, NotChecked=0, Total=380 [2022-04-06 16:30:28,199 INFO L913 BasicCegarLoop]: 37 mSDtfsCounter, 56 mSDsluCounter, 168 mSDsCounter, 0 mSdLazyCounter, 372 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 205 SdHoareTripleChecker+Invalid, 408 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 372 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-04-06 16:30:28,200 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [66 Valid, 205 Invalid, 408 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 372 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-04-06 16:30:28,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2022-04-06 16:30:28,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 198. [2022-04-06 16:30:28,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 198 states, 123 states have (on average 1.2357723577235773) internal successors, (152), 127 states have internal predecessors, (152), 55 states have call successors, (55), 20 states have call predecessors, (55), 19 states have return successors, (53), 50 states have call predecessors, (53), 53 states have call successors, (53) [2022-04-06 16:30:28,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 260 transitions. [2022-04-06 16:30:28,227 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 260 transitions. Word has length 78 [2022-04-06 16:30:28,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 16:30:28,227 INFO L478 AbstractCegarLoop]: Abstraction has 198 states and 260 transitions. [2022-04-06 16:30:28,228 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 11 states have internal predecessors, (31), 5 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (12), 5 states have call predecessors, (12), 5 states have call successors, (12) [2022-04-06 16:30:28,228 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 260 transitions. [2022-04-06 16:30:28,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2022-04-06 16:30:28,228 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 16:30:28,228 INFO L499 BasicCegarLoop]: trace histogram [9, 8, 8, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 16:30:28,257 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-04-06 16:30:28,458 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-04-06 16:30:28,458 INFO L403 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 16:30:28,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 16:30:28,458 INFO L85 PathProgramCache]: Analyzing trace with hash -1849570232, now seen corresponding path program 3 times [2022-04-06 16:30:28,458 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 16:30:28,459 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [836168055] [2022-04-06 16:30:28,459 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 16:30:28,459 INFO L85 PathProgramCache]: Analyzing trace with hash -1849570232, now seen corresponding path program 4 times [2022-04-06 16:30:28,459 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 16:30:28,460 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [149142591] [2022-04-06 16:30:28,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 16:30:28,460 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 16:30:28,469 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 16:30:28,469 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1275473120] [2022-04-06 16:30:28,469 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 16:30:28,469 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 16:30:28,469 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 16:30:28,470 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 16:30:28,471 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-04-06 16:30:28,513 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 16:30:28,514 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 16:30:28,515 INFO L263 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 27 conjunts are in the unsatisfiable core [2022-04-06 16:30:28,517 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 16:30:28,839 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 30 proven. 29 refuted. 0 times theorem prover too weak. 106 trivial. 0 not checked. [2022-04-06 16:30:28,839 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 16:30:29,006 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 37 proven. 10 refuted. 0 times theorem prover too weak. 118 trivial. 0 not checked. [2022-04-06 16:30:29,007 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 16:30:29,007 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [149142591] [2022-04-06 16:30:29,007 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 16:30:29,007 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1275473120] [2022-04-06 16:30:29,007 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1275473120] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 16:30:29,007 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 16:30:29,007 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 7] total 16 [2022-04-06 16:30:29,007 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 16:30:29,007 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [836168055] [2022-04-06 16:30:29,007 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [836168055] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 16:30:29,007 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 16:30:29,007 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-04-06 16:30:29,007 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2067144609] [2022-04-06 16:30:29,007 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 16:30:29,008 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-04-06 16:30:29,008 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 16:30:29,008 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-04-06 16:30:29,008 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2022-04-06 16:30:29,008 INFO L87 Difference]: Start difference. First operand 198 states and 260 transitions. Second operand has 14 states, 14 states have (on average 2.142857142857143) internal successors, (30), 11 states have internal predecessors, (30), 6 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (13), 5 states have call predecessors, (13), 5 states have call successors, (13) [2022-04-06 16:30:29,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 16:30:29,588 INFO L93 Difference]: Finished difference Result 212 states and 278 transitions. [2022-04-06 16:30:29,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-04-06 16:30:29,588 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.142857142857143) internal successors, (30), 11 states have internal predecessors, (30), 6 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (13), 5 states have call predecessors, (13), 5 states have call successors, (13) Word has length 82 [2022-04-06 16:30:29,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 16:30:29,590 INFO L225 Difference]: With dead ends: 212 [2022-04-06 16:30:29,590 INFO L226 Difference]: Without dead ends: 210 [2022-04-06 16:30:29,590 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 147 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=84, Invalid=422, Unknown=0, NotChecked=0, Total=506 [2022-04-06 16:30:29,590 INFO L913 BasicCegarLoop]: 40 mSDtfsCounter, 54 mSDsluCounter, 208 mSDsCounter, 0 mSdLazyCounter, 509 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 248 SdHoareTripleChecker+Invalid, 558 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 509 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-04-06 16:30:29,590 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [59 Valid, 248 Invalid, 558 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 509 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-04-06 16:30:29,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2022-04-06 16:30:29,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 203. [2022-04-06 16:30:29,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 203 states, 126 states have (on average 1.2301587301587302) internal successors, (155), 131 states have internal predecessors, (155), 56 states have call successors, (56), 21 states have call predecessors, (56), 20 states have return successors, (54), 50 states have call predecessors, (54), 54 states have call successors, (54) [2022-04-06 16:30:29,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 265 transitions. [2022-04-06 16:30:29,608 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 265 transitions. Word has length 82 [2022-04-06 16:30:29,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 16:30:29,610 INFO L478 AbstractCegarLoop]: Abstraction has 203 states and 265 transitions. [2022-04-06 16:30:29,610 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.142857142857143) internal successors, (30), 11 states have internal predecessors, (30), 6 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (13), 5 states have call predecessors, (13), 5 states have call successors, (13) [2022-04-06 16:30:29,610 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 265 transitions. [2022-04-06 16:30:29,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2022-04-06 16:30:29,611 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 16:30:29,611 INFO L499 BasicCegarLoop]: trace histogram [9, 8, 8, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 16:30:29,626 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-04-06 16:30:29,821 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-04-06 16:30:29,822 INFO L403 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 16:30:29,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 16:30:29,822 INFO L85 PathProgramCache]: Analyzing trace with hash 1768368813, now seen corresponding path program 1 times [2022-04-06 16:30:29,822 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 16:30:29,822 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [117027023] [2022-04-06 16:30:29,822 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 16:30:29,822 INFO L85 PathProgramCache]: Analyzing trace with hash 1768368813, now seen corresponding path program 2 times [2022-04-06 16:30:29,823 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 16:30:29,823 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [252755480] [2022-04-06 16:30:29,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 16:30:29,823 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 16:30:29,828 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 16:30:29,828 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1112869052] [2022-04-06 16:30:29,828 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 16:30:29,828 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 16:30:29,828 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 16:30:29,829 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 16:30:29,830 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-04-06 16:30:29,870 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 16:30:29,870 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 16:30:29,871 INFO L263 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 11 conjunts are in the unsatisfiable core [2022-04-06 16:30:29,872 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 16:30:29,997 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 16 proven. 73 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2022-04-06 16:30:29,997 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 16:30:30,160 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2022-04-06 16:30:30,160 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 16:30:30,160 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [252755480] [2022-04-06 16:30:30,160 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 16:30:30,160 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1112869052] [2022-04-06 16:30:30,160 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1112869052] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 16:30:30,160 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 16:30:30,161 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2022-04-06 16:30:30,161 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 16:30:30,161 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [117027023] [2022-04-06 16:30:30,161 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [117027023] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 16:30:30,161 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 16:30:30,161 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-04-06 16:30:30,161 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [132958420] [2022-04-06 16:30:30,161 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 16:30:30,161 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-04-06 16:30:30,161 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 16:30:30,161 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-04-06 16:30:30,162 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2022-04-06 16:30:30,162 INFO L87 Difference]: Start difference. First operand 203 states and 265 transitions. Second operand has 7 states, 7 states have (on average 4.0) internal successors, (28), 6 states have internal predecessors, (28), 5 states have call successors, (15), 5 states have call predecessors, (15), 3 states have return successors, (13), 3 states have call predecessors, (13), 4 states have call successors, (13) [2022-04-06 16:30:30,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 16:30:30,241 INFO L93 Difference]: Finished difference Result 214 states and 277 transitions. [2022-04-06 16:30:30,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-04-06 16:30:30,242 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.0) internal successors, (28), 6 states have internal predecessors, (28), 5 states have call successors, (15), 5 states have call predecessors, (15), 3 states have return successors, (13), 3 states have call predecessors, (13), 4 states have call successors, (13) Word has length 83 [2022-04-06 16:30:30,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 16:30:30,243 INFO L225 Difference]: With dead ends: 214 [2022-04-06 16:30:30,243 INFO L226 Difference]: Without dead ends: 206 [2022-04-06 16:30:30,243 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 155 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2022-04-06 16:30:30,244 INFO L913 BasicCegarLoop]: 50 mSDtfsCounter, 13 mSDsluCounter, 104 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 154 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 16:30:30,244 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 154 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 16:30:30,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2022-04-06 16:30:30,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 206. [2022-04-06 16:30:30,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 206 states, 129 states have (on average 1.2248062015503876) internal successors, (158), 134 states have internal predecessors, (158), 56 states have call successors, (56), 21 states have call predecessors, (56), 20 states have return successors, (54), 50 states have call predecessors, (54), 54 states have call successors, (54) [2022-04-06 16:30:30,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 268 transitions. [2022-04-06 16:30:30,263 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 268 transitions. Word has length 83 [2022-04-06 16:30:30,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 16:30:30,264 INFO L478 AbstractCegarLoop]: Abstraction has 206 states and 268 transitions. [2022-04-06 16:30:30,264 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.0) internal successors, (28), 6 states have internal predecessors, (28), 5 states have call successors, (15), 5 states have call predecessors, (15), 3 states have return successors, (13), 3 states have call predecessors, (13), 4 states have call successors, (13) [2022-04-06 16:30:30,264 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 268 transitions. [2022-04-06 16:30:30,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2022-04-06 16:30:30,264 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 16:30:30,265 INFO L499 BasicCegarLoop]: trace histogram [9, 8, 8, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 16:30:30,280 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-04-06 16:30:30,471 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-04-06 16:30:30,471 INFO L403 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 16:30:30,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 16:30:30,472 INFO L85 PathProgramCache]: Analyzing trace with hash -1017110725, now seen corresponding path program 1 times [2022-04-06 16:30:30,472 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 16:30:30,472 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1211498654] [2022-04-06 16:30:30,472 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 16:30:30,472 INFO L85 PathProgramCache]: Analyzing trace with hash -1017110725, now seen corresponding path program 2 times [2022-04-06 16:30:30,472 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 16:30:30,472 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1102833289] [2022-04-06 16:30:30,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 16:30:30,473 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 16:30:30,477 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 16:30:30,477 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1113651685] [2022-04-06 16:30:30,477 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 16:30:30,478 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 16:30:30,478 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 16:30:30,478 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 16:30:30,479 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-04-06 16:30:30,525 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 16:30:30,525 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 16:30:30,526 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 37 conjunts are in the unsatisfiable core [2022-04-06 16:30:30,527 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 16:30:30,918 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 16 proven. 10 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2022-04-06 16:30:30,919 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 16:30:31,202 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 16 proven. 10 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2022-04-06 16:30:31,202 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 16:30:31,202 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1102833289] [2022-04-06 16:30:31,202 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 16:30:31,202 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1113651685] [2022-04-06 16:30:31,202 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1113651685] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 16:30:31,202 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 16:30:31,203 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2022-04-06 16:30:31,203 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 16:30:31,203 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1211498654] [2022-04-06 16:30:31,203 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1211498654] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 16:30:31,203 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 16:30:31,203 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-04-06 16:30:31,203 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1730472281] [2022-04-06 16:30:31,203 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 16:30:31,203 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-04-06 16:30:31,203 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 16:30:31,203 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-04-06 16:30:31,204 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2022-04-06 16:30:31,204 INFO L87 Difference]: Start difference. First operand 206 states and 268 transitions. Second operand has 9 states, 8 states have (on average 3.25) internal successors, (26), 8 states have internal predecessors, (26), 5 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) [2022-04-06 16:30:31,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 16:30:31,479 INFO L93 Difference]: Finished difference Result 234 states and 311 transitions. [2022-04-06 16:30:31,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-04-06 16:30:31,480 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 3.25) internal successors, (26), 8 states have internal predecessors, (26), 5 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) Word has length 84 [2022-04-06 16:30:31,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 16:30:31,484 INFO L225 Difference]: With dead ends: 234 [2022-04-06 16:30:31,484 INFO L226 Difference]: Without dead ends: 232 [2022-04-06 16:30:31,484 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 154 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=61, Invalid=245, Unknown=0, NotChecked=0, Total=306 [2022-04-06 16:30:31,485 INFO L913 BasicCegarLoop]: 60 mSDtfsCounter, 25 mSDsluCounter, 247 mSDsCounter, 0 mSdLazyCounter, 313 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 307 SdHoareTripleChecker+Invalid, 334 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 313 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 16:30:31,485 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 307 Invalid, 334 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 313 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 16:30:31,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2022-04-06 16:30:31,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 229. [2022-04-06 16:30:31,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 229 states, 141 states have (on average 1.24822695035461) internal successors, (176), 148 states have internal predecessors, (176), 66 states have call successors, (66), 22 states have call predecessors, (66), 21 states have return successors, (64), 58 states have call predecessors, (64), 64 states have call successors, (64) [2022-04-06 16:30:31,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 306 transitions. [2022-04-06 16:30:31,512 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 306 transitions. Word has length 84 [2022-04-06 16:30:31,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 16:30:31,512 INFO L478 AbstractCegarLoop]: Abstraction has 229 states and 306 transitions. [2022-04-06 16:30:31,512 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 3.25) internal successors, (26), 8 states have internal predecessors, (26), 5 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) [2022-04-06 16:30:31,512 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 306 transitions. [2022-04-06 16:30:31,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2022-04-06 16:30:31,513 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 16:30:31,513 INFO L499 BasicCegarLoop]: trace histogram [9, 8, 8, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 16:30:31,530 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-04-06 16:30:31,727 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 16:30:31,727 INFO L403 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 16:30:31,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 16:30:31,728 INFO L85 PathProgramCache]: Analyzing trace with hash 1676300815, now seen corresponding path program 3 times [2022-04-06 16:30:31,728 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 16:30:31,728 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [532581201] [2022-04-06 16:30:31,728 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 16:30:31,728 INFO L85 PathProgramCache]: Analyzing trace with hash 1676300815, now seen corresponding path program 4 times [2022-04-06 16:30:31,728 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 16:30:31,728 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2031640664] [2022-04-06 16:30:31,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 16:30:31,729 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 16:30:31,733 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 16:30:31,733 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [373317831] [2022-04-06 16:30:31,734 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 16:30:31,734 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 16:30:31,734 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 16:30:31,734 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 16:30:31,737 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-04-06 16:30:31,777 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 16:30:31,778 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 16:30:31,778 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 5 conjunts are in the unsatisfiable core [2022-04-06 16:30:31,779 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 16:30:31,877 INFO L134 CoverageAnalysis]: Checked inductivity of 167 backedges. 31 proven. 0 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2022-04-06 16:30:31,877 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-04-06 16:30:31,877 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 16:30:31,877 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2031640664] [2022-04-06 16:30:31,878 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 16:30:31,878 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [373317831] [2022-04-06 16:30:31,878 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [373317831] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 16:30:31,878 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 16:30:31,878 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-06 16:30:31,878 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 16:30:31,878 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [532581201] [2022-04-06 16:30:31,878 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [532581201] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 16:30:31,878 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 16:30:31,878 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-06 16:30:31,878 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [758195952] [2022-04-06 16:30:31,878 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 16:30:31,878 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-04-06 16:30:31,879 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 16:30:31,879 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-04-06 16:30:31,879 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-04-06 16:30:31,879 INFO L87 Difference]: Start difference. First operand 229 states and 306 transitions. Second operand has 5 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 3 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2022-04-06 16:30:31,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 16:30:31,969 INFO L93 Difference]: Finished difference Result 371 states and 532 transitions. [2022-04-06 16:30:31,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-04-06 16:30:31,969 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 3 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) Word has length 87 [2022-04-06 16:30:31,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 16:30:31,971 INFO L225 Difference]: With dead ends: 371 [2022-04-06 16:30:31,971 INFO L226 Difference]: Without dead ends: 291 [2022-04-06 16:30:31,971 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-04-06 16:30:31,972 INFO L913 BasicCegarLoop]: 61 mSDtfsCounter, 12 mSDsluCounter, 111 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 172 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 16:30:31,972 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 172 Invalid, 79 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 16:30:31,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 291 states. [2022-04-06 16:30:31,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 291 to 257. [2022-04-06 16:30:31,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 257 states, 161 states have (on average 1.2546583850931676) internal successors, (202), 168 states have internal predecessors, (202), 74 states have call successors, (74), 22 states have call predecessors, (74), 21 states have return successors, (72), 66 states have call predecessors, (72), 72 states have call successors, (72) [2022-04-06 16:30:31,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 257 states to 257 states and 348 transitions. [2022-04-06 16:30:31,995 INFO L78 Accepts]: Start accepts. Automaton has 257 states and 348 transitions. Word has length 87 [2022-04-06 16:30:31,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 16:30:31,995 INFO L478 AbstractCegarLoop]: Abstraction has 257 states and 348 transitions. [2022-04-06 16:30:31,995 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 3 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2022-04-06 16:30:31,995 INFO L276 IsEmpty]: Start isEmpty. Operand 257 states and 348 transitions. [2022-04-06 16:30:31,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2022-04-06 16:30:31,996 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 16:30:31,996 INFO L499 BasicCegarLoop]: trace histogram [10, 9, 9, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 16:30:32,026 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-04-06 16:30:32,207 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 16:30:32,207 INFO L403 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 16:30:32,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 16:30:32,208 INFO L85 PathProgramCache]: Analyzing trace with hash -1175887352, now seen corresponding path program 1 times [2022-04-06 16:30:32,208 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 16:30:32,208 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1241398508] [2022-04-06 16:30:32,208 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 16:30:32,208 INFO L85 PathProgramCache]: Analyzing trace with hash -1175887352, now seen corresponding path program 2 times [2022-04-06 16:30:32,208 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 16:30:32,209 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1038035305] [2022-04-06 16:30:32,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 16:30:32,209 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 16:30:32,213 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 16:30:32,213 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [992440664] [2022-04-06 16:30:32,214 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 16:30:32,214 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 16:30:32,214 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 16:30:32,214 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 16:30:32,216 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-04-06 16:30:32,265 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 16:30:32,265 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 16:30:32,266 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 18 conjunts are in the unsatisfiable core [2022-04-06 16:30:32,267 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 16:30:32,429 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 37 proven. 10 refuted. 0 times theorem prover too weak. 149 trivial. 0 not checked. [2022-04-06 16:30:32,429 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 16:30:32,595 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 40 proven. 7 refuted. 0 times theorem prover too weak. 149 trivial. 0 not checked. [2022-04-06 16:30:32,595 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 16:30:32,595 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1038035305] [2022-04-06 16:30:32,595 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 16:30:32,595 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [992440664] [2022-04-06 16:30:32,595 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [992440664] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 16:30:32,595 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 16:30:32,596 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 12 [2022-04-06 16:30:32,596 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 16:30:32,596 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1241398508] [2022-04-06 16:30:32,596 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1241398508] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 16:30:32,596 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 16:30:32,596 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-04-06 16:30:32,596 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1828376838] [2022-04-06 16:30:32,596 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 16:30:32,596 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-04-06 16:30:32,596 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 16:30:32,596 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-04-06 16:30:32,597 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2022-04-06 16:30:32,597 INFO L87 Difference]: Start difference. First operand 257 states and 348 transitions. Second operand has 9 states, 9 states have (on average 3.0) internal successors, (27), 8 states have internal predecessors, (27), 4 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) [2022-04-06 16:30:32,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 16:30:32,816 INFO L93 Difference]: Finished difference Result 301 states and 415 transitions. [2022-04-06 16:30:32,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-04-06 16:30:32,816 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.0) internal successors, (27), 8 states have internal predecessors, (27), 4 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) Word has length 89 [2022-04-06 16:30:32,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 16:30:32,818 INFO L225 Difference]: With dead ends: 301 [2022-04-06 16:30:32,818 INFO L226 Difference]: Without dead ends: 297 [2022-04-06 16:30:32,818 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 166 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2022-04-06 16:30:32,819 INFO L913 BasicCegarLoop]: 47 mSDtfsCounter, 25 mSDsluCounter, 189 mSDsCounter, 0 mSdLazyCounter, 209 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 236 SdHoareTripleChecker+Invalid, 213 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 209 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 16:30:32,819 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 236 Invalid, 213 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 209 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 16:30:32,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 297 states. [2022-04-06 16:30:32,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 297 to 293. [2022-04-06 16:30:32,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 293 states, 183 states have (on average 1.273224043715847) internal successors, (233), 191 states have internal predecessors, (233), 87 states have call successors, (87), 23 states have call predecessors, (87), 22 states have return successors, (84), 78 states have call predecessors, (84), 84 states have call successors, (84) [2022-04-06 16:30:32,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 293 states to 293 states and 404 transitions. [2022-04-06 16:30:32,845 INFO L78 Accepts]: Start accepts. Automaton has 293 states and 404 transitions. Word has length 89 [2022-04-06 16:30:32,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 16:30:32,845 INFO L478 AbstractCegarLoop]: Abstraction has 293 states and 404 transitions. [2022-04-06 16:30:32,845 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.0) internal successors, (27), 8 states have internal predecessors, (27), 4 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) [2022-04-06 16:30:32,845 INFO L276 IsEmpty]: Start isEmpty. Operand 293 states and 404 transitions. [2022-04-06 16:30:32,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2022-04-06 16:30:32,846 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 16:30:32,846 INFO L499 BasicCegarLoop]: trace histogram [9, 8, 8, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 16:30:32,867 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-04-06 16:30:33,063 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2022-04-06 16:30:33,063 INFO L403 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 16:30:33,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 16:30:33,064 INFO L85 PathProgramCache]: Analyzing trace with hash -201422586, now seen corresponding path program 1 times [2022-04-06 16:30:33,064 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 16:30:33,064 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [193071316] [2022-04-06 16:30:33,064 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 16:30:33,064 INFO L85 PathProgramCache]: Analyzing trace with hash -201422586, now seen corresponding path program 2 times [2022-04-06 16:30:33,064 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 16:30:33,064 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1714702914] [2022-04-06 16:30:33,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 16:30:33,065 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 16:30:33,070 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 16:30:33,070 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1312585581] [2022-04-06 16:30:33,070 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 16:30:33,071 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 16:30:33,071 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 16:30:33,075 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 16:30:33,076 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-04-06 16:30:33,120 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 16:30:33,120 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 16:30:33,121 INFO L263 TraceCheckSpWp]: Trace formula consists of 266 conjuncts, 13 conjunts are in the unsatisfiable core [2022-04-06 16:30:33,123 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 16:30:33,252 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 21 proven. 78 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2022-04-06 16:30:33,252 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 16:30:33,401 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 21 proven. 14 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2022-04-06 16:30:33,401 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 16:30:33,401 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1714702914] [2022-04-06 16:30:33,401 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 16:30:33,401 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1312585581] [2022-04-06 16:30:33,401 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1312585581] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 16:30:33,401 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 16:30:33,401 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2022-04-06 16:30:33,401 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 16:30:33,401 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [193071316] [2022-04-06 16:30:33,401 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [193071316] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 16:30:33,402 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 16:30:33,402 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-04-06 16:30:33,402 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1334626044] [2022-04-06 16:30:33,402 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 16:30:33,402 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-04-06 16:30:33,402 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 16:30:33,402 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-04-06 16:30:33,402 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2022-04-06 16:30:33,402 INFO L87 Difference]: Start difference. First operand 293 states and 404 transitions. Second operand has 8 states, 8 states have (on average 4.25) internal successors, (34), 7 states have internal predecessors, (34), 5 states have call successors, (15), 5 states have call predecessors, (15), 3 states have return successors, (13), 3 states have call predecessors, (13), 4 states have call successors, (13) [2022-04-06 16:30:33,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 16:30:33,513 INFO L93 Difference]: Finished difference Result 463 states and 647 transitions. [2022-04-06 16:30:33,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-04-06 16:30:33,513 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.25) internal successors, (34), 7 states have internal predecessors, (34), 5 states have call successors, (15), 5 states have call predecessors, (15), 3 states have return successors, (13), 3 states have call predecessors, (13), 4 states have call successors, (13) Word has length 89 [2022-04-06 16:30:33,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 16:30:33,515 INFO L225 Difference]: With dead ends: 463 [2022-04-06 16:30:33,515 INFO L226 Difference]: Without dead ends: 329 [2022-04-06 16:30:33,516 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 165 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=107, Invalid=165, Unknown=0, NotChecked=0, Total=272 [2022-04-06 16:30:33,517 INFO L913 BasicCegarLoop]: 54 mSDtfsCounter, 44 mSDsluCounter, 115 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 169 SdHoareTripleChecker+Invalid, 93 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 16:30:33,517 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 169 Invalid, 93 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 16:30:33,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 329 states. [2022-04-06 16:30:33,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 329 to 327. [2022-04-06 16:30:33,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 327 states, 207 states have (on average 1.2367149758454106) internal successors, (256), 214 states have internal predecessors, (256), 90 states have call successors, (90), 30 states have call predecessors, (90), 29 states have return successors, (87), 82 states have call predecessors, (87), 87 states have call successors, (87) [2022-04-06 16:30:33,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 327 states to 327 states and 433 transitions. [2022-04-06 16:30:33,545 INFO L78 Accepts]: Start accepts. Automaton has 327 states and 433 transitions. Word has length 89 [2022-04-06 16:30:33,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 16:30:33,545 INFO L478 AbstractCegarLoop]: Abstraction has 327 states and 433 transitions. [2022-04-06 16:30:33,545 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.25) internal successors, (34), 7 states have internal predecessors, (34), 5 states have call successors, (15), 5 states have call predecessors, (15), 3 states have return successors, (13), 3 states have call predecessors, (13), 4 states have call successors, (13) [2022-04-06 16:30:33,545 INFO L276 IsEmpty]: Start isEmpty. Operand 327 states and 433 transitions. [2022-04-06 16:30:33,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2022-04-06 16:30:33,545 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 16:30:33,546 INFO L499 BasicCegarLoop]: trace histogram [12, 11, 11, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 16:30:33,569 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-04-06 16:30:33,759 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2022-04-06 16:30:33,759 INFO L403 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 16:30:33,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 16:30:33,760 INFO L85 PathProgramCache]: Analyzing trace with hash 1415088729, now seen corresponding path program 1 times [2022-04-06 16:30:33,760 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 16:30:33,760 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [229831072] [2022-04-06 16:30:33,760 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 16:30:33,760 INFO L85 PathProgramCache]: Analyzing trace with hash 1415088729, now seen corresponding path program 2 times [2022-04-06 16:30:33,760 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 16:30:33,760 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2006982370] [2022-04-06 16:30:33,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 16:30:33,760 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 16:30:33,765 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 16:30:33,765 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1198132039] [2022-04-06 16:30:33,766 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 16:30:33,766 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 16:30:33,766 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 16:30:33,768 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 16:30:33,770 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-04-06 16:30:33,849 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 16:30:33,849 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 16:30:33,851 INFO L263 TraceCheckSpWp]: Trace formula consists of 274 conjuncts, 64 conjunts are in the unsatisfiable core [2022-04-06 16:30:33,853 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 16:30:37,423 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 84 proven. 53 refuted. 0 times theorem prover too weak. 151 trivial. 0 not checked. [2022-04-06 16:30:37,424 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 16:30:37,866 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-06 16:30:46,214 WARN L232 SmtUtils]: Spent 6.74s on a formula simplification that was a NOOP. DAG size: 62 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-04-06 16:30:46,215 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 16:30:46,215 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2006982370] [2022-04-06 16:30:46,215 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 16:30:46,215 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1198132039] [2022-04-06 16:30:46,215 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1198132039] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 16:30:46,215 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-04-06 16:30:46,215 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2022-04-06 16:30:46,215 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 16:30:46,215 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [229831072] [2022-04-06 16:30:46,215 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [229831072] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 16:30:46,215 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 16:30:46,215 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-04-06 16:30:46,215 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1355902206] [2022-04-06 16:30:46,216 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 16:30:46,216 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-04-06 16:30:46,216 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 16:30:46,216 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-04-06 16:30:46,216 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=369, Unknown=0, NotChecked=0, Total=462 [2022-04-06 16:30:46,216 INFO L87 Difference]: Start difference. First operand 327 states and 433 transitions. Second operand has 16 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 12 states have internal predecessors, (34), 7 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (16), 7 states have call predecessors, (16), 6 states have call successors, (16) [2022-04-06 16:30:48,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 16:30:48,341 INFO L93 Difference]: Finished difference Result 339 states and 443 transitions. [2022-04-06 16:30:48,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-04-06 16:30:48,341 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 12 states have internal predecessors, (34), 7 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (16), 7 states have call predecessors, (16), 6 states have call successors, (16) Word has length 101 [2022-04-06 16:30:48,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 16:30:48,343 INFO L225 Difference]: With dead ends: 339 [2022-04-06 16:30:48,343 INFO L226 Difference]: Without dead ends: 337 [2022-04-06 16:30:48,343 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 106 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 9.4s TimeCoverageRelationStatistics Valid=122, Invalid=528, Unknown=0, NotChecked=0, Total=650 [2022-04-06 16:30:48,346 INFO L913 BasicCegarLoop]: 48 mSDtfsCounter, 59 mSDsluCounter, 221 mSDsCounter, 0 mSdLazyCounter, 557 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 269 SdHoareTripleChecker+Invalid, 611 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 557 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-04-06 16:30:48,346 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [76 Valid, 269 Invalid, 611 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 557 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-04-06 16:30:48,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 337 states. [2022-04-06 16:30:48,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 337 to 335. [2022-04-06 16:30:48,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 335 states, 213 states have (on average 1.2300469483568075) internal successors, (262), 220 states have internal predecessors, (262), 90 states have call successors, (90), 32 states have call predecessors, (90), 31 states have return successors, (87), 82 states have call predecessors, (87), 87 states have call successors, (87) [2022-04-06 16:30:48,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 335 states to 335 states and 439 transitions. [2022-04-06 16:30:48,374 INFO L78 Accepts]: Start accepts. Automaton has 335 states and 439 transitions. Word has length 101 [2022-04-06 16:30:48,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 16:30:48,374 INFO L478 AbstractCegarLoop]: Abstraction has 335 states and 439 transitions. [2022-04-06 16:30:48,374 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 12 states have internal predecessors, (34), 7 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (16), 7 states have call predecessors, (16), 6 states have call successors, (16) [2022-04-06 16:30:48,374 INFO L276 IsEmpty]: Start isEmpty. Operand 335 states and 439 transitions. [2022-04-06 16:30:48,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2022-04-06 16:30:48,376 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 16:30:48,376 INFO L499 BasicCegarLoop]: trace histogram [13, 12, 12, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 16:30:48,393 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-04-06 16:30:48,591 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 16:30:48,591 INFO L403 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 16:30:48,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 16:30:48,592 INFO L85 PathProgramCache]: Analyzing trace with hash -1524088572, now seen corresponding path program 5 times [2022-04-06 16:30:48,592 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 16:30:48,592 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [792443727] [2022-04-06 16:30:48,592 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 16:30:48,592 INFO L85 PathProgramCache]: Analyzing trace with hash -1524088572, now seen corresponding path program 6 times [2022-04-06 16:30:48,592 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 16:30:48,592 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1762585929] [2022-04-06 16:30:48,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 16:30:48,593 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 16:30:48,598 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 16:30:48,598 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [506648452] [2022-04-06 16:30:48,598 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 16:30:48,598 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 16:30:48,598 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 16:30:48,603 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 16:30:48,604 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-04-06 16:30:48,672 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-04-06 16:30:48,672 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 16:30:48,673 INFO L263 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 12 conjunts are in the unsatisfiable core [2022-04-06 16:30:48,675 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 16:30:48,837 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 64 proven. 10 refuted. 0 times theorem prover too weak. 268 trivial. 0 not checked. [2022-04-06 16:30:48,838 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 16:30:49,011 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 64 proven. 10 refuted. 0 times theorem prover too weak. 268 trivial. 0 not checked. [2022-04-06 16:30:49,012 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 16:30:49,012 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1762585929] [2022-04-06 16:30:49,012 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 16:30:49,012 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [506648452] [2022-04-06 16:30:49,012 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [506648452] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 16:30:49,012 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 16:30:49,012 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2022-04-06 16:30:49,012 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 16:30:49,012 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [792443727] [2022-04-06 16:30:49,012 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [792443727] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 16:30:49,012 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 16:30:49,013 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-04-06 16:30:49,013 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [256324509] [2022-04-06 16:30:49,013 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 16:30:49,013 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-04-06 16:30:49,013 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 16:30:49,013 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-04-06 16:30:49,013 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-04-06 16:30:49,013 INFO L87 Difference]: Start difference. First operand 335 states and 439 transitions. Second operand has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 6 states have internal predecessors, (25), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2022-04-06 16:30:49,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 16:30:49,101 INFO L93 Difference]: Finished difference Result 341 states and 444 transitions. [2022-04-06 16:30:49,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-04-06 16:30:49,101 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 6 states have internal predecessors, (25), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) Word has length 105 [2022-04-06 16:30:49,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 16:30:49,103 INFO L225 Difference]: With dead ends: 341 [2022-04-06 16:30:49,103 INFO L226 Difference]: Without dead ends: 339 [2022-04-06 16:30:49,103 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 211 GetRequests, 200 SyntacticMatches, 3 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-04-06 16:30:49,106 INFO L913 BasicCegarLoop]: 34 mSDtfsCounter, 13 mSDsluCounter, 133 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 167 SdHoareTripleChecker+Invalid, 86 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 84 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 16:30:49,106 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 167 Invalid, 86 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 84 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 16:30:49,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 339 states. [2022-04-06 16:30:49,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 339 to 339. [2022-04-06 16:30:49,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 339 states, 216 states have (on average 1.2268518518518519) internal successors, (265), 223 states have internal predecessors, (265), 90 states have call successors, (90), 33 states have call predecessors, (90), 32 states have return successors, (87), 82 states have call predecessors, (87), 87 states have call successors, (87) [2022-04-06 16:30:49,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 339 states to 339 states and 442 transitions. [2022-04-06 16:30:49,138 INFO L78 Accepts]: Start accepts. Automaton has 339 states and 442 transitions. Word has length 105 [2022-04-06 16:30:49,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 16:30:49,139 INFO L478 AbstractCegarLoop]: Abstraction has 339 states and 442 transitions. [2022-04-06 16:30:49,139 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 6 states have internal predecessors, (25), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2022-04-06 16:30:49,139 INFO L276 IsEmpty]: Start isEmpty. Operand 339 states and 442 transitions. [2022-04-06 16:30:49,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2022-04-06 16:30:49,139 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 16:30:49,139 INFO L499 BasicCegarLoop]: trace histogram [13, 12, 12, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 16:30:49,158 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-04-06 16:30:49,355 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 16:30:49,355 INFO L403 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 16:30:49,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 16:30:49,356 INFO L85 PathProgramCache]: Analyzing trace with hash -1026601615, now seen corresponding path program 3 times [2022-04-06 16:30:49,356 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 16:30:49,356 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [556643077] [2022-04-06 16:30:49,356 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 16:30:49,356 INFO L85 PathProgramCache]: Analyzing trace with hash -1026601615, now seen corresponding path program 4 times [2022-04-06 16:30:49,356 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 16:30:49,356 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1037258441] [2022-04-06 16:30:49,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 16:30:49,357 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 16:30:49,367 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 16:30:49,367 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [670018795] [2022-04-06 16:30:49,367 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 16:30:49,367 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 16:30:49,367 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 16:30:49,371 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 16:30:49,372 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-04-06 16:30:49,424 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 16:30:49,424 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 16:30:49,425 INFO L263 TraceCheckSpWp]: Trace formula consists of 283 conjuncts, 13 conjunts are in the unsatisfiable core [2022-04-06 16:30:49,427 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 16:30:49,602 INFO L134 CoverageAnalysis]: Checked inductivity of 335 backedges. 24 proven. 215 refuted. 0 times theorem prover too weak. 96 trivial. 0 not checked. [2022-04-06 16:30:49,602 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 16:30:49,784 INFO L134 CoverageAnalysis]: Checked inductivity of 335 backedges. 24 proven. 23 refuted. 0 times theorem prover too weak. 288 trivial. 0 not checked. [2022-04-06 16:30:49,784 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 16:30:49,784 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1037258441] [2022-04-06 16:30:49,784 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 16:30:49,784 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [670018795] [2022-04-06 16:30:49,785 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [670018795] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 16:30:49,785 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 16:30:49,785 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2022-04-06 16:30:49,785 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 16:30:49,785 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [556643077] [2022-04-06 16:30:49,785 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [556643077] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 16:30:49,785 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 16:30:49,785 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-04-06 16:30:49,785 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1380046880] [2022-04-06 16:30:49,785 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 16:30:49,785 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-04-06 16:30:49,785 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 16:30:49,786 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-04-06 16:30:49,786 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2022-04-06 16:30:49,786 INFO L87 Difference]: Start difference. First operand 339 states and 442 transitions. Second operand has 8 states, 8 states have (on average 4.25) internal successors, (34), 7 states have internal predecessors, (34), 6 states have call successors, (19), 6 states have call predecessors, (19), 4 states have return successors, (17), 4 states have call predecessors, (17), 5 states have call successors, (17) [2022-04-06 16:30:49,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 16:30:49,898 INFO L93 Difference]: Finished difference Result 349 states and 452 transitions. [2022-04-06 16:30:49,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-04-06 16:30:49,899 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.25) internal successors, (34), 7 states have internal predecessors, (34), 6 states have call successors, (19), 6 states have call predecessors, (19), 4 states have return successors, (17), 4 states have call predecessors, (17), 5 states have call successors, (17) Word has length 106 [2022-04-06 16:30:49,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 16:30:49,901 INFO L225 Difference]: With dead ends: 349 [2022-04-06 16:30:49,901 INFO L226 Difference]: Without dead ends: 342 [2022-04-06 16:30:49,901 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 214 GetRequests, 199 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=108, Invalid=164, Unknown=0, NotChecked=0, Total=272 [2022-04-06 16:30:49,902 INFO L913 BasicCegarLoop]: 54 mSDtfsCounter, 24 mSDsluCounter, 110 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 164 SdHoareTripleChecker+Invalid, 106 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 16:30:49,903 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [24 Valid, 164 Invalid, 106 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 16:30:49,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 342 states. [2022-04-06 16:30:49,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 342 to 342. [2022-04-06 16:30:49,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 342 states, 219 states have (on average 1.2237442922374429) internal successors, (268), 226 states have internal predecessors, (268), 90 states have call successors, (90), 33 states have call predecessors, (90), 32 states have return successors, (87), 82 states have call predecessors, (87), 87 states have call successors, (87) [2022-04-06 16:30:49,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 342 states to 342 states and 445 transitions. [2022-04-06 16:30:49,950 INFO L78 Accepts]: Start accepts. Automaton has 342 states and 445 transitions. Word has length 106 [2022-04-06 16:30:49,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 16:30:49,951 INFO L478 AbstractCegarLoop]: Abstraction has 342 states and 445 transitions. [2022-04-06 16:30:49,951 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.25) internal successors, (34), 7 states have internal predecessors, (34), 6 states have call successors, (19), 6 states have call predecessors, (19), 4 states have return successors, (17), 4 states have call predecessors, (17), 5 states have call successors, (17) [2022-04-06 16:30:49,952 INFO L276 IsEmpty]: Start isEmpty. Operand 342 states and 445 transitions. [2022-04-06 16:30:49,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2022-04-06 16:30:49,953 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 16:30:49,953 INFO L499 BasicCegarLoop]: trace histogram [13, 12, 12, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 16:30:49,977 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-04-06 16:30:50,171 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2022-04-06 16:30:50,171 INFO L403 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 16:30:50,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 16:30:50,171 INFO L85 PathProgramCache]: Analyzing trace with hash -1761848073, now seen corresponding path program 3 times [2022-04-06 16:30:50,171 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 16:30:50,171 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [287064148] [2022-04-06 16:30:50,172 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 16:30:50,172 INFO L85 PathProgramCache]: Analyzing trace with hash -1761848073, now seen corresponding path program 4 times [2022-04-06 16:30:50,172 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 16:30:50,172 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [665605116] [2022-04-06 16:30:50,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 16:30:50,172 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 16:30:50,177 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 16:30:50,177 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2155787] [2022-04-06 16:30:50,177 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 16:30:50,177 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 16:30:50,177 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 16:30:50,181 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 16:30:50,182 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-04-06 16:30:50,232 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 16:30:50,232 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 16:30:50,234 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 44 conjunts are in the unsatisfiable core [2022-04-06 16:30:50,235 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 16:30:51,733 INFO L134 CoverageAnalysis]: Checked inductivity of 336 backedges. 47 proven. 34 refuted. 0 times theorem prover too weak. 255 trivial. 0 not checked. [2022-04-06 16:30:51,733 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 16:30:52,556 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-06 16:30:52,559 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-06 16:30:54,531 INFO L134 CoverageAnalysis]: Checked inductivity of 336 backedges. 47 proven. 34 refuted. 0 times theorem prover too weak. 255 trivial. 0 not checked. [2022-04-06 16:30:54,532 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 16:30:54,532 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [665605116] [2022-04-06 16:30:54,532 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 16:30:54,532 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2155787] [2022-04-06 16:30:54,532 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2155787] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 16:30:54,532 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 16:30:54,532 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 23 [2022-04-06 16:30:54,532 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 16:30:54,532 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [287064148] [2022-04-06 16:30:54,532 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [287064148] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 16:30:54,532 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 16:30:54,533 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-04-06 16:30:54,533 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [890012706] [2022-04-06 16:30:54,533 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 16:30:54,533 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-04-06 16:30:54,533 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 16:30:54,533 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-04-06 16:30:54,533 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=416, Unknown=0, NotChecked=0, Total=506 [2022-04-06 16:30:54,533 INFO L87 Difference]: Start difference. First operand 342 states and 445 transitions. Second operand has 14 states, 13 states have (on average 2.4615384615384617) internal successors, (32), 12 states have internal predecessors, (32), 7 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (17), 5 states have call predecessors, (17), 6 states have call successors, (17) [2022-04-06 16:30:55,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 16:30:55,822 INFO L93 Difference]: Finished difference Result 369 states and 485 transitions. [2022-04-06 16:30:55,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-04-06 16:30:55,822 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.4615384615384617) internal successors, (32), 12 states have internal predecessors, (32), 7 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (17), 5 states have call predecessors, (17), 6 states have call successors, (17) Word has length 107 [2022-04-06 16:30:55,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 16:30:55,829 INFO L225 Difference]: With dead ends: 369 [2022-04-06 16:30:55,829 INFO L226 Difference]: Without dead ends: 366 [2022-04-06 16:30:55,830 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 218 GetRequests, 191 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=140, Invalid=616, Unknown=0, NotChecked=0, Total=756 [2022-04-06 16:30:55,830 INFO L913 BasicCegarLoop]: 53 mSDtfsCounter, 36 mSDsluCounter, 302 mSDsCounter, 0 mSdLazyCounter, 656 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 355 SdHoareTripleChecker+Invalid, 695 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 656 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-04-06 16:30:55,830 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 355 Invalid, 695 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 656 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-04-06 16:30:55,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 366 states. [2022-04-06 16:30:55,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 366 to 364. [2022-04-06 16:30:55,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 364 states, 231 states have (on average 1.2294372294372293) internal successors, (284), 239 states have internal predecessors, (284), 99 states have call successors, (99), 34 states have call predecessors, (99), 33 states have return successors, (96), 90 states have call predecessors, (96), 96 states have call successors, (96) [2022-04-06 16:30:55,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 364 states to 364 states and 479 transitions. [2022-04-06 16:30:55,864 INFO L78 Accepts]: Start accepts. Automaton has 364 states and 479 transitions. Word has length 107 [2022-04-06 16:30:55,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 16:30:55,864 INFO L478 AbstractCegarLoop]: Abstraction has 364 states and 479 transitions. [2022-04-06 16:30:55,864 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.4615384615384617) internal successors, (32), 12 states have internal predecessors, (32), 7 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (17), 5 states have call predecessors, (17), 6 states have call successors, (17) [2022-04-06 16:30:55,864 INFO L276 IsEmpty]: Start isEmpty. Operand 364 states and 479 transitions. [2022-04-06 16:30:55,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2022-04-06 16:30:55,865 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 16:30:55,865 INFO L499 BasicCegarLoop]: trace histogram [13, 12, 12, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 16:30:55,897 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2022-04-06 16:30:56,081 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2022-04-06 16:30:56,082 INFO L403 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 16:30:56,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 16:30:56,082 INFO L85 PathProgramCache]: Analyzing trace with hash 1514731471, now seen corresponding path program 5 times [2022-04-06 16:30:56,082 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 16:30:56,082 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [431247136] [2022-04-06 16:30:56,082 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 16:30:56,082 INFO L85 PathProgramCache]: Analyzing trace with hash 1514731471, now seen corresponding path program 6 times [2022-04-06 16:30:56,082 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 16:30:56,082 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1894269087] [2022-04-06 16:30:56,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 16:30:56,083 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 16:30:56,087 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 16:30:56,088 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2124806128] [2022-04-06 16:30:56,088 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 16:30:56,088 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 16:30:56,088 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 16:30:56,092 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 16:30:56,093 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-04-06 16:30:56,193 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-04-06 16:30:56,194 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 16:30:56,195 INFO L263 TraceCheckSpWp]: Trace formula consists of 267 conjuncts, 15 conjunts are in the unsatisfiable core [2022-04-06 16:30:56,196 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 16:30:56,359 INFO L134 CoverageAnalysis]: Checked inductivity of 341 backedges. 24 proven. 221 refuted. 0 times theorem prover too weak. 96 trivial. 0 not checked. [2022-04-06 16:30:56,360 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 16:30:56,556 INFO L134 CoverageAnalysis]: Checked inductivity of 341 backedges. 24 proven. 29 refuted. 0 times theorem prover too weak. 288 trivial. 0 not checked. [2022-04-06 16:30:56,556 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 16:30:56,556 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1894269087] [2022-04-06 16:30:56,556 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 16:30:56,556 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2124806128] [2022-04-06 16:30:56,556 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2124806128] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 16:30:56,556 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 16:30:56,557 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2022-04-06 16:30:56,557 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 16:30:56,557 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [431247136] [2022-04-06 16:30:56,557 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [431247136] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 16:30:56,557 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 16:30:56,557 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-04-06 16:30:56,557 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1983852633] [2022-04-06 16:30:56,557 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 16:30:56,557 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-04-06 16:30:56,557 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 16:30:56,557 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-04-06 16:30:56,558 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=144, Unknown=0, NotChecked=0, Total=240 [2022-04-06 16:30:56,558 INFO L87 Difference]: Start difference. First operand 364 states and 479 transitions. Second operand has 9 states, 9 states have (on average 4.222222222222222) internal successors, (38), 8 states have internal predecessors, (38), 6 states have call successors, (19), 6 states have call predecessors, (19), 4 states have return successors, (17), 4 states have call predecessors, (17), 5 states have call successors, (17) [2022-04-06 16:30:56,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 16:30:56,691 INFO L93 Difference]: Finished difference Result 434 states and 549 transitions. [2022-04-06 16:30:56,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-04-06 16:30:56,691 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.222222222222222) internal successors, (38), 8 states have internal predecessors, (38), 6 states have call successors, (19), 6 states have call predecessors, (19), 4 states have return successors, (17), 4 states have call predecessors, (17), 5 states have call successors, (17) Word has length 110 [2022-04-06 16:30:56,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 16:30:56,693 INFO L225 Difference]: With dead ends: 434 [2022-04-06 16:30:56,693 INFO L226 Difference]: Without dead ends: 425 [2022-04-06 16:30:56,693 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 223 GetRequests, 205 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=153, Invalid=227, Unknown=0, NotChecked=0, Total=380 [2022-04-06 16:30:56,694 INFO L913 BasicCegarLoop]: 58 mSDtfsCounter, 42 mSDsluCounter, 153 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 211 SdHoareTripleChecker+Invalid, 106 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 16:30:56,694 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 211 Invalid, 106 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 66 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 16:30:56,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 425 states. [2022-04-06 16:30:56,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 425 to 423. [2022-04-06 16:30:56,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 423 states, 272 states have (on average 1.2022058823529411) internal successors, (327), 279 states have internal predecessors, (327), 106 states have call successors, (106), 45 states have call predecessors, (106), 44 states have return successors, (103), 98 states have call predecessors, (103), 103 states have call successors, (103) [2022-04-06 16:30:56,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 423 states to 423 states and 536 transitions. [2022-04-06 16:30:56,749 INFO L78 Accepts]: Start accepts. Automaton has 423 states and 536 transitions. Word has length 110 [2022-04-06 16:30:56,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 16:30:56,749 INFO L478 AbstractCegarLoop]: Abstraction has 423 states and 536 transitions. [2022-04-06 16:30:56,749 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.222222222222222) internal successors, (38), 8 states have internal predecessors, (38), 6 states have call successors, (19), 6 states have call predecessors, (19), 4 states have return successors, (17), 4 states have call predecessors, (17), 5 states have call successors, (17) [2022-04-06 16:30:56,749 INFO L276 IsEmpty]: Start isEmpty. Operand 423 states and 536 transitions. [2022-04-06 16:30:56,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2022-04-06 16:30:56,750 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 16:30:56,750 INFO L499 BasicCegarLoop]: trace histogram [13, 12, 12, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 16:30:56,765 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2022-04-06 16:30:56,954 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-04-06 16:30:56,955 INFO L403 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 16:30:56,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 16:30:56,955 INFO L85 PathProgramCache]: Analyzing trace with hash -289933735, now seen corresponding path program 5 times [2022-04-06 16:30:56,955 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 16:30:56,955 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1403461449] [2022-04-06 16:30:56,955 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 16:30:56,955 INFO L85 PathProgramCache]: Analyzing trace with hash -289933735, now seen corresponding path program 6 times [2022-04-06 16:30:56,955 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 16:30:56,955 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2047329068] [2022-04-06 16:30:56,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 16:30:56,956 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 16:30:56,962 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 16:30:56,963 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1357776348] [2022-04-06 16:30:56,963 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 16:30:56,963 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 16:30:56,963 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 16:30:56,964 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 16:30:56,965 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-04-06 16:30:57,030 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-04-06 16:30:57,031 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 16:30:57,032 INFO L263 TraceCheckSpWp]: Trace formula consists of 269 conjuncts, 7 conjunts are in the unsatisfiable core [2022-04-06 16:30:57,033 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 16:30:57,177 INFO L134 CoverageAnalysis]: Checked inductivity of 343 backedges. 44 proven. 11 refuted. 0 times theorem prover too weak. 288 trivial. 0 not checked. [2022-04-06 16:30:57,177 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 16:30:57,324 INFO L134 CoverageAnalysis]: Checked inductivity of 343 backedges. 44 proven. 11 refuted. 0 times theorem prover too weak. 288 trivial. 0 not checked. [2022-04-06 16:30:57,325 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 16:30:57,325 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2047329068] [2022-04-06 16:30:57,325 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 16:30:57,325 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1357776348] [2022-04-06 16:30:57,325 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1357776348] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 16:30:57,325 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 16:30:57,325 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2022-04-06 16:30:57,325 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 16:30:57,325 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1403461449] [2022-04-06 16:30:57,325 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1403461449] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 16:30:57,325 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 16:30:57,325 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-04-06 16:30:57,325 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1123074104] [2022-04-06 16:30:57,325 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 16:30:57,326 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-04-06 16:30:57,326 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 16:30:57,326 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-04-06 16:30:57,326 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-04-06 16:30:57,326 INFO L87 Difference]: Start difference. First operand 423 states and 536 transitions. Second operand has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 7 states have internal predecessors, (33), 4 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (17), 3 states have call predecessors, (17), 3 states have call successors, (17) [2022-04-06 16:30:57,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 16:30:57,676 INFO L93 Difference]: Finished difference Result 589 states and 810 transitions. [2022-04-06 16:30:57,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-04-06 16:30:57,676 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 7 states have internal predecessors, (33), 4 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (17), 3 states have call predecessors, (17), 3 states have call successors, (17) Word has length 111 [2022-04-06 16:30:57,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 16:30:57,678 INFO L225 Difference]: With dead ends: 589 [2022-04-06 16:30:57,678 INFO L226 Difference]: Without dead ends: 581 [2022-04-06 16:30:57,679 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 237 GetRequests, 220 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2022-04-06 16:30:57,679 INFO L913 BasicCegarLoop]: 107 mSDtfsCounter, 32 mSDsluCounter, 261 mSDsCounter, 0 mSdLazyCounter, 262 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 368 SdHoareTripleChecker+Invalid, 307 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 262 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 16:30:57,679 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 368 Invalid, 307 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 262 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 16:30:57,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 581 states. [2022-04-06 16:30:57,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 581 to 470. [2022-04-06 16:30:57,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 470 states, 301 states have (on average 1.2259136212624584) internal successors, (369), 306 states have internal predecessors, (369), 124 states have call successors, (124), 45 states have call predecessors, (124), 44 states have return successors, (121), 118 states have call predecessors, (121), 121 states have call successors, (121) [2022-04-06 16:30:57,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 470 states to 470 states and 614 transitions. [2022-04-06 16:30:57,743 INFO L78 Accepts]: Start accepts. Automaton has 470 states and 614 transitions. Word has length 111 [2022-04-06 16:30:57,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 16:30:57,744 INFO L478 AbstractCegarLoop]: Abstraction has 470 states and 614 transitions. [2022-04-06 16:30:57,745 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 7 states have internal predecessors, (33), 4 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (17), 3 states have call predecessors, (17), 3 states have call successors, (17) [2022-04-06 16:30:57,745 INFO L276 IsEmpty]: Start isEmpty. Operand 470 states and 614 transitions. [2022-04-06 16:30:57,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2022-04-06 16:30:57,746 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 16:30:57,746 INFO L499 BasicCegarLoop]: trace histogram [13, 12, 12, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 16:30:57,765 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2022-04-06 16:30:57,955 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2022-04-06 16:30:57,955 INFO L403 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 16:30:57,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 16:30:57,956 INFO L85 PathProgramCache]: Analyzing trace with hash -1282766646, now seen corresponding path program 3 times [2022-04-06 16:30:57,956 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 16:30:57,956 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [472169896] [2022-04-06 16:30:57,956 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 16:30:57,956 INFO L85 PathProgramCache]: Analyzing trace with hash -1282766646, now seen corresponding path program 4 times [2022-04-06 16:30:57,956 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 16:30:57,956 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [620209100] [2022-04-06 16:30:57,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 16:30:57,956 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 16:30:57,961 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 16:30:57,962 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [554534269] [2022-04-06 16:30:57,962 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 16:30:57,962 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 16:30:57,962 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 16:30:57,963 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 16:30:57,964 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-04-06 16:30:58,020 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 16:30:58,021 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 16:30:58,022 INFO L263 TraceCheckSpWp]: Trace formula consists of 312 conjuncts, 15 conjunts are in the unsatisfiable core [2022-04-06 16:30:58,023 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 16:30:58,213 INFO L134 CoverageAnalysis]: Checked inductivity of 347 backedges. 29 proven. 222 refuted. 0 times theorem prover too weak. 96 trivial. 0 not checked. [2022-04-06 16:30:58,213 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 16:30:58,425 INFO L134 CoverageAnalysis]: Checked inductivity of 347 backedges. 29 proven. 30 refuted. 0 times theorem prover too weak. 288 trivial. 0 not checked. [2022-04-06 16:30:58,426 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 16:30:58,426 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [620209100] [2022-04-06 16:30:58,426 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 16:30:58,426 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [554534269] [2022-04-06 16:30:58,426 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [554534269] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 16:30:58,426 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 16:30:58,426 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2022-04-06 16:30:58,426 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 16:30:58,426 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [472169896] [2022-04-06 16:30:58,426 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [472169896] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 16:30:58,426 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 16:30:58,426 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-04-06 16:30:58,426 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [372713434] [2022-04-06 16:30:58,426 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 16:30:58,427 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-04-06 16:30:58,427 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 16:30:58,427 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-04-06 16:30:58,427 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=144, Unknown=0, NotChecked=0, Total=240 [2022-04-06 16:30:58,427 INFO L87 Difference]: Start difference. First operand 470 states and 614 transitions. Second operand has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 8 states have internal predecessors, (40), 6 states have call successors, (19), 6 states have call predecessors, (19), 4 states have return successors, (17), 4 states have call predecessors, (17), 5 states have call successors, (17) [2022-04-06 16:30:58,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 16:30:58,572 INFO L93 Difference]: Finished difference Result 644 states and 881 transitions. [2022-04-06 16:30:58,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-04-06 16:30:58,573 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 8 states have internal predecessors, (40), 6 states have call successors, (19), 6 states have call predecessors, (19), 4 states have return successors, (17), 4 states have call predecessors, (17), 5 states have call successors, (17) Word has length 112 [2022-04-06 16:30:58,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 16:30:58,575 INFO L225 Difference]: With dead ends: 644 [2022-04-06 16:30:58,575 INFO L226 Difference]: Without dead ends: 474 [2022-04-06 16:30:58,576 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 227 GetRequests, 209 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=152, Invalid=228, Unknown=0, NotChecked=0, Total=380 [2022-04-06 16:30:58,576 INFO L913 BasicCegarLoop]: 58 mSDtfsCounter, 73 mSDsluCounter, 114 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 80 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 172 SdHoareTripleChecker+Invalid, 138 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 80 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 16:30:58,576 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [73 Valid, 172 Invalid, 138 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [80 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 16:30:58,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 474 states. [2022-04-06 16:30:58,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 474 to 474. [2022-04-06 16:30:58,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 474 states, 305 states have (on average 1.2163934426229508) internal successors, (371), 310 states have internal predecessors, (371), 124 states have call successors, (124), 45 states have call predecessors, (124), 44 states have return successors, (121), 118 states have call predecessors, (121), 121 states have call successors, (121) [2022-04-06 16:30:58,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 474 states to 474 states and 616 transitions. [2022-04-06 16:30:58,627 INFO L78 Accepts]: Start accepts. Automaton has 474 states and 616 transitions. Word has length 112 [2022-04-06 16:30:58,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 16:30:58,627 INFO L478 AbstractCegarLoop]: Abstraction has 474 states and 616 transitions. [2022-04-06 16:30:58,627 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 8 states have internal predecessors, (40), 6 states have call successors, (19), 6 states have call predecessors, (19), 4 states have return successors, (17), 4 states have call predecessors, (17), 5 states have call successors, (17) [2022-04-06 16:30:58,627 INFO L276 IsEmpty]: Start isEmpty. Operand 474 states and 616 transitions. [2022-04-06 16:30:58,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2022-04-06 16:30:58,628 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 16:30:58,628 INFO L499 BasicCegarLoop]: trace histogram [13, 12, 12, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 16:30:58,646 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2022-04-06 16:30:58,843 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-04-06 16:30:58,843 INFO L403 AbstractCegarLoop]: === Iteration 30 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 16:30:58,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 16:30:58,844 INFO L85 PathProgramCache]: Analyzing trace with hash 1546024104, now seen corresponding path program 5 times [2022-04-06 16:30:58,844 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 16:30:58,844 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [227277169] [2022-04-06 16:30:58,844 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 16:30:58,844 INFO L85 PathProgramCache]: Analyzing trace with hash 1546024104, now seen corresponding path program 6 times [2022-04-06 16:30:58,844 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 16:30:58,844 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [761986744] [2022-04-06 16:30:58,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 16:30:58,845 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 16:30:58,849 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 16:30:58,849 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [473846122] [2022-04-06 16:30:58,850 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 16:30:58,850 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 16:30:58,850 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 16:30:58,851 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 16:30:58,853 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-04-06 16:30:58,929 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-04-06 16:30:58,930 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 16:30:58,931 INFO L263 TraceCheckSpWp]: Trace formula consists of 332 conjuncts, 17 conjunts are in the unsatisfiable core [2022-04-06 16:30:58,933 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 16:30:59,105 INFO L134 CoverageAnalysis]: Checked inductivity of 357 backedges. 32 proven. 229 refuted. 0 times theorem prover too weak. 96 trivial. 0 not checked. [2022-04-06 16:30:59,105 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 16:30:59,313 INFO L134 CoverageAnalysis]: Checked inductivity of 357 backedges. 32 proven. 37 refuted. 0 times theorem prover too weak. 288 trivial. 0 not checked. [2022-04-06 16:30:59,313 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 16:30:59,313 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [761986744] [2022-04-06 16:30:59,313 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 16:30:59,313 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [473846122] [2022-04-06 16:30:59,313 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [473846122] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 16:30:59,314 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 16:30:59,314 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2022-04-06 16:30:59,314 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 16:30:59,314 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [227277169] [2022-04-06 16:30:59,314 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [227277169] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 16:30:59,314 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 16:30:59,314 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-04-06 16:30:59,314 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2096903584] [2022-04-06 16:30:59,314 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 16:30:59,314 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-04-06 16:30:59,314 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 16:30:59,315 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-04-06 16:30:59,315 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=181, Unknown=0, NotChecked=0, Total=306 [2022-04-06 16:30:59,315 INFO L87 Difference]: Start difference. First operand 474 states and 616 transitions. Second operand has 10 states, 10 states have (on average 4.4) internal successors, (44), 9 states have internal predecessors, (44), 6 states have call successors, (19), 6 states have call predecessors, (19), 4 states have return successors, (17), 4 states have call predecessors, (17), 5 states have call successors, (17) [2022-04-06 16:30:59,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 16:30:59,498 INFO L93 Difference]: Finished difference Result 731 states and 966 transitions. [2022-04-06 16:30:59,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-04-06 16:30:59,499 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.4) internal successors, (44), 9 states have internal predecessors, (44), 6 states have call successors, (19), 6 states have call predecessors, (19), 4 states have return successors, (17), 4 states have call predecessors, (17), 5 states have call successors, (17) Word has length 116 [2022-04-06 16:30:59,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 16:30:59,501 INFO L225 Difference]: With dead ends: 731 [2022-04-06 16:30:59,501 INFO L226 Difference]: Without dead ends: 561 [2022-04-06 16:30:59,502 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 236 GetRequests, 215 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=205, Invalid=301, Unknown=0, NotChecked=0, Total=506 [2022-04-06 16:30:59,502 INFO L913 BasicCegarLoop]: 64 mSDtfsCounter, 86 mSDsluCounter, 167 mSDsCounter, 0 mSdLazyCounter, 111 mSolverCounterSat, 81 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 231 SdHoareTripleChecker+Invalid, 192 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 81 IncrementalHoareTripleChecker+Valid, 111 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 16:30:59,502 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [86 Valid, 231 Invalid, 192 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [81 Valid, 111 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 16:30:59,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 561 states. [2022-04-06 16:30:59,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 561 to 553. [2022-04-06 16:30:59,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 553 states, 361 states have (on average 1.1911357340720221) internal successors, (430), 367 states have internal predecessors, (430), 133 states have call successors, (133), 59 states have call predecessors, (133), 58 states have return successors, (129), 126 states have call predecessors, (129), 129 states have call successors, (129) [2022-04-06 16:30:59,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 553 states to 553 states and 692 transitions. [2022-04-06 16:30:59,558 INFO L78 Accepts]: Start accepts. Automaton has 553 states and 692 transitions. Word has length 116 [2022-04-06 16:30:59,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 16:30:59,558 INFO L478 AbstractCegarLoop]: Abstraction has 553 states and 692 transitions. [2022-04-06 16:30:59,558 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.4) internal successors, (44), 9 states have internal predecessors, (44), 6 states have call successors, (19), 6 states have call predecessors, (19), 4 states have return successors, (17), 4 states have call predecessors, (17), 5 states have call successors, (17) [2022-04-06 16:30:59,558 INFO L276 IsEmpty]: Start isEmpty. Operand 553 states and 692 transitions. [2022-04-06 16:30:59,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2022-04-06 16:30:59,559 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 16:30:59,559 INFO L499 BasicCegarLoop]: trace histogram [14, 13, 13, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 16:30:59,578 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2022-04-06 16:30:59,775 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 16:30:59,775 INFO L403 AbstractCegarLoop]: === Iteration 31 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 16:30:59,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 16:30:59,776 INFO L85 PathProgramCache]: Analyzing trace with hash 1978671899, now seen corresponding path program 3 times [2022-04-06 16:30:59,776 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 16:30:59,776 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1323860178] [2022-04-06 16:30:59,776 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 16:30:59,776 INFO L85 PathProgramCache]: Analyzing trace with hash 1978671899, now seen corresponding path program 4 times [2022-04-06 16:30:59,776 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 16:30:59,776 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1132330977] [2022-04-06 16:30:59,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 16:30:59,777 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 16:30:59,781 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 16:30:59,781 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [105417600] [2022-04-06 16:30:59,781 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 16:30:59,781 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 16:30:59,781 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 16:30:59,783 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 16:30:59,784 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-04-06 16:30:59,839 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 16:30:59,839 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 16:30:59,840 INFO L263 TraceCheckSpWp]: Trace formula consists of 274 conjuncts, 34 conjunts are in the unsatisfiable core [2022-04-06 16:30:59,842 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 16:31:00,114 INFO L134 CoverageAnalysis]: Checked inductivity of 405 backedges. 57 proven. 43 refuted. 0 times theorem prover too weak. 305 trivial. 0 not checked. [2022-04-06 16:31:00,115 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 16:31:00,311 INFO L134 CoverageAnalysis]: Checked inductivity of 405 backedges. 78 proven. 7 refuted. 0 times theorem prover too weak. 320 trivial. 0 not checked. [2022-04-06 16:31:00,311 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 16:31:00,312 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1132330977] [2022-04-06 16:31:00,312 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 16:31:00,312 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [105417600] [2022-04-06 16:31:00,312 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [105417600] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 16:31:00,312 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 16:31:00,312 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8] total 14 [2022-04-06 16:31:00,312 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 16:31:00,312 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1323860178] [2022-04-06 16:31:00,312 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1323860178] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 16:31:00,312 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 16:31:00,312 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-04-06 16:31:00,312 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [863833087] [2022-04-06 16:31:00,312 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 16:31:00,313 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-04-06 16:31:00,313 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 16:31:00,313 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-04-06 16:31:00,313 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2022-04-06 16:31:00,313 INFO L87 Difference]: Start difference. First operand 553 states and 692 transitions. Second operand has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 10 states have internal predecessors, (36), 6 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (16), 6 states have call predecessors, (16), 6 states have call successors, (16) [2022-04-06 16:31:00,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 16:31:00,572 INFO L93 Difference]: Finished difference Result 606 states and 774 transitions. [2022-04-06 16:31:00,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-04-06 16:31:00,572 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 10 states have internal predecessors, (36), 6 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (16), 6 states have call predecessors, (16), 6 states have call successors, (16) Word has length 118 [2022-04-06 16:31:00,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 16:31:00,574 INFO L225 Difference]: With dead ends: 606 [2022-04-06 16:31:00,574 INFO L226 Difference]: Without dead ends: 603 [2022-04-06 16:31:00,575 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 239 GetRequests, 222 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2022-04-06 16:31:00,575 INFO L913 BasicCegarLoop]: 56 mSDtfsCounter, 34 mSDsluCounter, 260 mSDsCounter, 0 mSdLazyCounter, 340 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 316 SdHoareTripleChecker+Invalid, 370 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 340 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 16:31:00,575 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [40 Valid, 316 Invalid, 370 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 340 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 16:31:00,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 603 states. [2022-04-06 16:31:00,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 603 to 596. [2022-04-06 16:31:00,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 596 states, 386 states have (on average 1.2098445595854923) internal successors, (467), 393 states have internal predecessors, (467), 150 states have call successors, (150), 60 states have call predecessors, (150), 59 states have return successors, (146), 142 states have call predecessors, (146), 146 states have call successors, (146) [2022-04-06 16:31:00,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 596 states to 596 states and 763 transitions. [2022-04-06 16:31:00,641 INFO L78 Accepts]: Start accepts. Automaton has 596 states and 763 transitions. Word has length 118 [2022-04-06 16:31:00,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 16:31:00,641 INFO L478 AbstractCegarLoop]: Abstraction has 596 states and 763 transitions. [2022-04-06 16:31:00,641 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 10 states have internal predecessors, (36), 6 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (16), 6 states have call predecessors, (16), 6 states have call successors, (16) [2022-04-06 16:31:00,641 INFO L276 IsEmpty]: Start isEmpty. Operand 596 states and 763 transitions. [2022-04-06 16:31:00,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2022-04-06 16:31:00,642 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 16:31:00,642 INFO L499 BasicCegarLoop]: trace histogram [16, 15, 15, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 16:31:00,660 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2022-04-06 16:31:00,844 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2022-04-06 16:31:00,844 INFO L403 AbstractCegarLoop]: === Iteration 32 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 16:31:00,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 16:31:00,844 INFO L85 PathProgramCache]: Analyzing trace with hash 992936989, now seen corresponding path program 5 times [2022-04-06 16:31:00,845 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 16:31:00,845 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1995127150] [2022-04-06 16:31:00,845 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 16:31:00,845 INFO L85 PathProgramCache]: Analyzing trace with hash 992936989, now seen corresponding path program 6 times [2022-04-06 16:31:00,845 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 16:31:00,845 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1221293221] [2022-04-06 16:31:00,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 16:31:00,845 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 16:31:00,850 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 16:31:00,850 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1212741124] [2022-04-06 16:31:00,850 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 16:31:00,850 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 16:31:00,850 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 16:31:00,851 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 16:31:00,852 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-04-06 16:31:01,219 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-04-06 16:31:01,219 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 16:31:01,222 INFO L263 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 48 conjunts are in the unsatisfiable core [2022-04-06 16:31:01,223 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 16:31:22,237 INFO L134 CoverageAnalysis]: Checked inductivity of 516 backedges. 91 proven. 28 refuted. 0 times theorem prover too weak. 397 trivial. 0 not checked. [2022-04-06 16:31:22,237 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 16:31:25,418 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 16:31:25,418 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1221293221] [2022-04-06 16:31:25,418 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 16:31:25,418 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1212741124] [2022-04-06 16:31:25,418 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1212741124] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 16:31:25,418 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-04-06 16:31:25,418 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2022-04-06 16:31:25,419 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 16:31:25,419 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1995127150] [2022-04-06 16:31:25,419 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1995127150] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 16:31:25,419 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 16:31:25,419 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-04-06 16:31:25,419 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1307619761] [2022-04-06 16:31:25,419 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 16:31:25,419 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-04-06 16:31:25,419 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 16:31:25,419 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-04-06 16:31:25,420 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=403, Unknown=0, NotChecked=0, Total=506 [2022-04-06 16:31:25,420 INFO L87 Difference]: Start difference. First operand 596 states and 763 transitions. Second operand has 16 states, 14 states have (on average 2.5) internal successors, (35), 13 states have internal predecessors, (35), 7 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (16), 7 states have call predecessors, (16), 6 states have call successors, (16) [2022-04-06 16:31:27,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 16:31:27,015 INFO L93 Difference]: Finished difference Result 619 states and 791 transitions. [2022-04-06 16:31:27,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-04-06 16:31:27,016 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 14 states have (on average 2.5) internal successors, (35), 13 states have internal predecessors, (35), 7 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (16), 7 states have call predecessors, (16), 6 states have call successors, (16) Word has length 124 [2022-04-06 16:31:27,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 16:31:27,018 INFO L225 Difference]: With dead ends: 619 [2022-04-06 16:31:27,018 INFO L226 Difference]: Without dead ends: 615 [2022-04-06 16:31:27,020 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 151 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 166 ImplicationChecksByTransitivity, 5.9s TimeCoverageRelationStatistics Valid=133, Invalid=569, Unknown=0, NotChecked=0, Total=702 [2022-04-06 16:31:27,020 INFO L913 BasicCegarLoop]: 50 mSDtfsCounter, 50 mSDsluCounter, 243 mSDsCounter, 0 mSdLazyCounter, 573 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 293 SdHoareTripleChecker+Invalid, 596 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 573 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-04-06 16:31:27,020 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [60 Valid, 293 Invalid, 596 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 573 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-04-06 16:31:27,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 615 states. [2022-04-06 16:31:27,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 615 to 609. [2022-04-06 16:31:27,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 609 states, 394 states have (on average 1.2081218274111676) internal successors, (476), 400 states have internal predecessors, (476), 154 states have call successors, (154), 62 states have call predecessors, (154), 60 states have return successors, (150), 146 states have call predecessors, (150), 150 states have call successors, (150) [2022-04-06 16:31:27,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 609 states to 609 states and 780 transitions. [2022-04-06 16:31:27,085 INFO L78 Accepts]: Start accepts. Automaton has 609 states and 780 transitions. Word has length 124 [2022-04-06 16:31:27,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 16:31:27,086 INFO L478 AbstractCegarLoop]: Abstraction has 609 states and 780 transitions. [2022-04-06 16:31:27,086 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 14 states have (on average 2.5) internal successors, (35), 13 states have internal predecessors, (35), 7 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (16), 7 states have call predecessors, (16), 6 states have call successors, (16) [2022-04-06 16:31:27,086 INFO L276 IsEmpty]: Start isEmpty. Operand 609 states and 780 transitions. [2022-04-06 16:31:27,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2022-04-06 16:31:27,087 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 16:31:27,087 INFO L499 BasicCegarLoop]: trace histogram [15, 14, 14, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 16:31:27,093 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2022-04-06 16:31:27,293 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 16:31:27,293 INFO L403 AbstractCegarLoop]: === Iteration 33 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 16:31:27,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 16:31:27,293 INFO L85 PathProgramCache]: Analyzing trace with hash -1110867224, now seen corresponding path program 7 times [2022-04-06 16:31:27,293 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 16:31:27,293 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [829176438] [2022-04-06 16:31:27,294 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 16:31:27,294 INFO L85 PathProgramCache]: Analyzing trace with hash -1110867224, now seen corresponding path program 8 times [2022-04-06 16:31:27,294 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 16:31:27,294 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1002040521] [2022-04-06 16:31:27,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 16:31:27,294 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 16:31:27,299 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 16:31:27,299 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [721721394] [2022-04-06 16:31:27,299 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 16:31:27,299 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 16:31:27,299 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 16:31:27,300 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 16:31:27,301 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2022-04-06 16:31:27,359 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 16:31:27,359 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 16:31:27,360 INFO L263 TraceCheckSpWp]: Trace formula consists of 331 conjuncts, 71 conjunts are in the unsatisfiable core [2022-04-06 16:31:27,362 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 16:31:27,910 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-06 16:31:27,911 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-06 16:31:28,113 INFO L134 CoverageAnalysis]: Checked inductivity of 462 backedges. 93 proven. 101 refuted. 0 times theorem prover too weak. 268 trivial. 0 not checked. [2022-04-06 16:31:28,113 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 16:31:28,564 INFO L134 CoverageAnalysis]: Checked inductivity of 462 backedges. 125 proven. 32 refuted. 0 times theorem prover too weak. 305 trivial. 0 not checked. [2022-04-06 16:31:28,564 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 16:31:28,564 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1002040521] [2022-04-06 16:31:28,564 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 16:31:28,564 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [721721394] [2022-04-06 16:31:28,564 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [721721394] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 16:31:28,564 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 16:31:28,564 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 19 [2022-04-06 16:31:28,565 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 16:31:28,565 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [829176438] [2022-04-06 16:31:28,565 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [829176438] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 16:31:28,565 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 16:31:28,565 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-04-06 16:31:28,565 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [60001937] [2022-04-06 16:31:28,565 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 16:31:28,565 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-04-06 16:31:28,565 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 16:31:28,565 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-04-06 16:31:28,566 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2022-04-06 16:31:28,566 INFO L87 Difference]: Start difference. First operand 609 states and 780 transitions. Second operand has 14 states, 13 states have (on average 2.923076923076923) internal successors, (38), 12 states have internal predecessors, (38), 8 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (19), 8 states have call predecessors, (19), 8 states have call successors, (19) [2022-04-06 16:31:29,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 16:31:29,162 INFO L93 Difference]: Finished difference Result 638 states and 824 transitions. [2022-04-06 16:31:29,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-04-06 16:31:29,163 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.923076923076923) internal successors, (38), 12 states have internal predecessors, (38), 8 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (19), 8 states have call predecessors, (19), 8 states have call successors, (19) Word has length 123 [2022-04-06 16:31:29,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 16:31:29,166 INFO L225 Difference]: With dead ends: 638 [2022-04-06 16:31:29,166 INFO L226 Difference]: Without dead ends: 636 [2022-04-06 16:31:29,166 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 249 GetRequests, 226 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=87, Invalid=419, Unknown=0, NotChecked=0, Total=506 [2022-04-06 16:31:29,167 INFO L913 BasicCegarLoop]: 58 mSDtfsCounter, 38 mSDsluCounter, 370 mSDsCounter, 0 mSdLazyCounter, 716 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 428 SdHoareTripleChecker+Invalid, 745 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 716 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-04-06 16:31:29,167 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [50 Valid, 428 Invalid, 745 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 716 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-04-06 16:31:29,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 636 states. [2022-04-06 16:31:29,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 636 to 632. [2022-04-06 16:31:29,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 632 states, 404 states have (on average 1.2128712871287128) internal successors, (490), 410 states have internal predecessors, (490), 166 states have call successors, (166), 63 states have call predecessors, (166), 61 states have return successors, (162), 158 states have call predecessors, (162), 162 states have call successors, (162) [2022-04-06 16:31:29,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 632 states to 632 states and 818 transitions. [2022-04-06 16:31:29,230 INFO L78 Accepts]: Start accepts. Automaton has 632 states and 818 transitions. Word has length 123 [2022-04-06 16:31:29,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 16:31:29,230 INFO L478 AbstractCegarLoop]: Abstraction has 632 states and 818 transitions. [2022-04-06 16:31:29,230 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.923076923076923) internal successors, (38), 12 states have internal predecessors, (38), 8 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (19), 8 states have call predecessors, (19), 8 states have call successors, (19) [2022-04-06 16:31:29,230 INFO L276 IsEmpty]: Start isEmpty. Operand 632 states and 818 transitions. [2022-04-06 16:31:29,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2022-04-06 16:31:29,231 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 16:31:29,231 INFO L499 BasicCegarLoop]: trace histogram [16, 15, 15, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 16:31:29,254 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2022-04-06 16:31:29,443 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 16:31:29,443 INFO L403 AbstractCegarLoop]: === Iteration 34 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 16:31:29,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 16:31:29,444 INFO L85 PathProgramCache]: Analyzing trace with hash -270396677, now seen corresponding path program 9 times [2022-04-06 16:31:29,444 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 16:31:29,444 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [417943494] [2022-04-06 16:31:29,444 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 16:31:29,444 INFO L85 PathProgramCache]: Analyzing trace with hash -270396677, now seen corresponding path program 10 times [2022-04-06 16:31:29,444 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 16:31:29,444 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [215013910] [2022-04-06 16:31:29,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 16:31:29,444 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 16:31:29,449 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 16:31:29,449 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1643088157] [2022-04-06 16:31:29,449 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 16:31:29,449 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 16:31:29,449 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 16:31:29,450 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 16:31:29,451 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2022-04-06 16:31:29,513 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 16:31:29,513 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 16:31:29,515 INFO L263 TraceCheckSpWp]: Trace formula consists of 292 conjuncts, 68 conjunts are in the unsatisfiable core [2022-04-06 16:31:29,517 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 16:31:30,466 INFO L134 CoverageAnalysis]: Checked inductivity of 523 backedges. 69 proven. 118 refuted. 0 times theorem prover too weak. 336 trivial. 0 not checked. [2022-04-06 16:31:30,466 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 16:31:35,772 INFO L134 CoverageAnalysis]: Checked inductivity of 523 backedges. 77 proven. 108 refuted. 0 times theorem prover too weak. 338 trivial. 0 not checked. [2022-04-06 16:31:35,772 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 16:31:35,772 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [215013910] [2022-04-06 16:31:35,772 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 16:31:35,772 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1643088157] [2022-04-06 16:31:35,773 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1643088157] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 16:31:35,773 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 16:31:35,773 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 22 [2022-04-06 16:31:35,773 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 16:31:35,773 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [417943494] [2022-04-06 16:31:35,773 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [417943494] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 16:31:35,773 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 16:31:35,773 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-04-06 16:31:35,773 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1074697494] [2022-04-06 16:31:35,773 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 16:31:35,773 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-04-06 16:31:35,773 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 16:31:35,774 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-04-06 16:31:35,774 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=354, Unknown=1, NotChecked=0, Total=462 [2022-04-06 16:31:35,774 INFO L87 Difference]: Start difference. First operand 632 states and 818 transitions. Second operand has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 12 states have internal predecessors, (38), 7 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (20), 7 states have call predecessors, (20), 7 states have call successors, (20) [2022-04-06 16:31:36,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 16:31:36,344 INFO L93 Difference]: Finished difference Result 642 states and 827 transitions. [2022-04-06 16:31:36,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-04-06 16:31:36,345 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 12 states have internal predecessors, (38), 7 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (20), 7 states have call predecessors, (20), 7 states have call successors, (20) Word has length 128 [2022-04-06 16:31:36,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 16:31:36,348 INFO L225 Difference]: With dead ends: 642 [2022-04-06 16:31:36,348 INFO L226 Difference]: Without dead ends: 640 [2022-04-06 16:31:36,348 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 259 GetRequests, 232 SyntacticMatches, 3 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=144, Invalid=505, Unknown=1, NotChecked=0, Total=650 [2022-04-06 16:31:36,348 INFO L913 BasicCegarLoop]: 58 mSDtfsCounter, 37 mSDsluCounter, 317 mSDsCounter, 0 mSdLazyCounter, 660 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 375 SdHoareTripleChecker+Invalid, 697 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 660 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-04-06 16:31:36,348 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [49 Valid, 375 Invalid, 697 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 660 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-04-06 16:31:36,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 640 states. [2022-04-06 16:31:36,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 640 to 636. [2022-04-06 16:31:36,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 636 states, 407 states have (on average 1.2113022113022114) internal successors, (493), 413 states have internal predecessors, (493), 166 states have call successors, (166), 64 states have call predecessors, (166), 62 states have return successors, (162), 158 states have call predecessors, (162), 162 states have call successors, (162) [2022-04-06 16:31:36,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 636 states to 636 states and 821 transitions. [2022-04-06 16:31:36,420 INFO L78 Accepts]: Start accepts. Automaton has 636 states and 821 transitions. Word has length 128 [2022-04-06 16:31:36,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 16:31:36,420 INFO L478 AbstractCegarLoop]: Abstraction has 636 states and 821 transitions. [2022-04-06 16:31:36,420 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 12 states have internal predecessors, (38), 7 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (20), 7 states have call predecessors, (20), 7 states have call successors, (20) [2022-04-06 16:31:36,420 INFO L276 IsEmpty]: Start isEmpty. Operand 636 states and 821 transitions. [2022-04-06 16:31:36,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2022-04-06 16:31:36,421 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 16:31:36,421 INFO L499 BasicCegarLoop]: trace histogram [17, 16, 16, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 16:31:36,439 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2022-04-06 16:31:36,621 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2022-04-06 16:31:36,622 INFO L403 AbstractCegarLoop]: === Iteration 35 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 16:31:36,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 16:31:36,622 INFO L85 PathProgramCache]: Analyzing trace with hash -677811269, now seen corresponding path program 7 times [2022-04-06 16:31:36,622 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 16:31:36,622 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1495122707] [2022-04-06 16:31:36,622 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 16:31:36,622 INFO L85 PathProgramCache]: Analyzing trace with hash -677811269, now seen corresponding path program 8 times [2022-04-06 16:31:36,623 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 16:31:36,623 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [197285093] [2022-04-06 16:31:36,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 16:31:36,623 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 16:31:36,628 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 16:31:36,628 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1311566830] [2022-04-06 16:31:36,628 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 16:31:36,628 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 16:31:36,628 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 16:31:36,629 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 16:31:36,630 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2022-04-06 16:31:36,693 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 16:31:36,693 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 16:31:36,694 INFO L263 TraceCheckSpWp]: Trace formula consists of 331 conjuncts, 52 conjunts are in the unsatisfiable core [2022-04-06 16:31:36,696 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 16:31:37,520 INFO L134 CoverageAnalysis]: Checked inductivity of 581 backedges. 137 proven. 57 refuted. 0 times theorem prover too weak. 387 trivial. 0 not checked. [2022-04-06 16:31:37,521 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 16:31:38,090 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-06 16:31:38,242 INFO L134 CoverageAnalysis]: Checked inductivity of 581 backedges. 152 proven. 12 refuted. 0 times theorem prover too weak. 417 trivial. 0 not checked. [2022-04-06 16:31:38,242 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 16:31:38,242 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [197285093] [2022-04-06 16:31:38,242 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 16:31:38,242 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1311566830] [2022-04-06 16:31:38,242 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1311566830] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 16:31:38,243 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 16:31:38,243 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 11] total 22 [2022-04-06 16:31:38,243 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 16:31:38,243 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1495122707] [2022-04-06 16:31:38,243 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1495122707] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 16:31:38,243 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 16:31:38,243 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-04-06 16:31:38,243 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [261200786] [2022-04-06 16:31:38,243 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 16:31:38,243 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-04-06 16:31:38,243 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 16:31:38,244 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-04-06 16:31:38,244 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=385, Unknown=0, NotChecked=0, Total=462 [2022-04-06 16:31:38,244 INFO L87 Difference]: Start difference. First operand 636 states and 821 transitions. Second operand has 16 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 10 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (21), 8 states have call predecessors, (21), 9 states have call successors, (21) [2022-04-06 16:31:39,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 16:31:39,832 INFO L93 Difference]: Finished difference Result 669 states and 868 transitions. [2022-04-06 16:31:39,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-04-06 16:31:39,832 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 10 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (21), 8 states have call predecessors, (21), 9 states have call successors, (21) Word has length 130 [2022-04-06 16:31:39,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 16:31:39,835 INFO L225 Difference]: With dead ends: 669 [2022-04-06 16:31:39,835 INFO L226 Difference]: Without dead ends: 664 [2022-04-06 16:31:39,835 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 262 GetRequests, 238 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=96, Invalid=504, Unknown=0, NotChecked=0, Total=600 [2022-04-06 16:31:39,836 INFO L913 BasicCegarLoop]: 62 mSDtfsCounter, 36 mSDsluCounter, 368 mSDsCounter, 0 mSdLazyCounter, 823 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 430 SdHoareTripleChecker+Invalid, 867 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 823 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-04-06 16:31:39,836 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [48 Valid, 430 Invalid, 867 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 823 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-04-06 16:31:39,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 664 states. [2022-04-06 16:31:39,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 664 to 644. [2022-04-06 16:31:39,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 644 states, 411 states have (on average 1.2092457420924574) internal successors, (497), 417 states have internal predecessors, (497), 169 states have call successors, (169), 64 states have call predecessors, (169), 63 states have return successors, (166), 162 states have call predecessors, (166), 166 states have call successors, (166) [2022-04-06 16:31:39,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 644 states to 644 states and 832 transitions. [2022-04-06 16:31:39,936 INFO L78 Accepts]: Start accepts. Automaton has 644 states and 832 transitions. Word has length 130 [2022-04-06 16:31:39,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 16:31:39,937 INFO L478 AbstractCegarLoop]: Abstraction has 644 states and 832 transitions. [2022-04-06 16:31:39,937 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 10 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (21), 8 states have call predecessors, (21), 9 states have call successors, (21) [2022-04-06 16:31:39,937 INFO L276 IsEmpty]: Start isEmpty. Operand 644 states and 832 transitions. [2022-04-06 16:31:39,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2022-04-06 16:31:39,938 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 16:31:39,938 INFO L499 BasicCegarLoop]: trace histogram [17, 16, 16, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 16:31:39,965 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2022-04-06 16:31:40,151 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2022-04-06 16:31:40,151 INFO L403 AbstractCegarLoop]: === Iteration 36 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 16:31:40,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 16:31:40,152 INFO L85 PathProgramCache]: Analyzing trace with hash -2098906485, now seen corresponding path program 7 times [2022-04-06 16:31:40,152 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 16:31:40,152 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1549715570] [2022-04-06 16:31:40,152 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 16:31:40,152 INFO L85 PathProgramCache]: Analyzing trace with hash -2098906485, now seen corresponding path program 8 times [2022-04-06 16:31:40,152 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 16:31:40,152 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1783997081] [2022-04-06 16:31:40,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 16:31:40,152 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 16:31:40,158 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 16:31:40,158 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1172439635] [2022-04-06 16:31:40,158 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 16:31:40,158 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 16:31:40,158 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 16:31:40,159 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 16:31:40,160 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2022-04-06 16:31:40,212 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 16:31:40,212 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 16:31:40,213 INFO L263 TraceCheckSpWp]: Trace formula consists of 349 conjuncts, 17 conjunts are in the unsatisfiable core [2022-04-06 16:31:40,215 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 16:31:40,417 INFO L134 CoverageAnalysis]: Checked inductivity of 586 backedges. 32 proven. 434 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2022-04-06 16:31:40,418 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 16:31:40,659 INFO L134 CoverageAnalysis]: Checked inductivity of 586 backedges. 32 proven. 50 refuted. 0 times theorem prover too weak. 504 trivial. 0 not checked. [2022-04-06 16:31:40,659 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 16:31:40,660 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1783997081] [2022-04-06 16:31:40,660 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 16:31:40,660 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1172439635] [2022-04-06 16:31:40,660 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1172439635] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 16:31:40,660 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 16:31:40,660 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2022-04-06 16:31:40,660 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 16:31:40,660 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1549715570] [2022-04-06 16:31:40,660 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1549715570] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 16:31:40,660 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 16:31:40,660 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-04-06 16:31:40,660 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1663107440] [2022-04-06 16:31:40,660 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 16:31:40,661 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-04-06 16:31:40,661 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 16:31:40,661 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-04-06 16:31:40,661 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=181, Unknown=0, NotChecked=0, Total=306 [2022-04-06 16:31:40,661 INFO L87 Difference]: Start difference. First operand 644 states and 832 transitions. Second operand has 10 states, 10 states have (on average 4.4) internal successors, (44), 9 states have internal predecessors, (44), 7 states have call successors, (23), 7 states have call predecessors, (23), 5 states have return successors, (21), 5 states have call predecessors, (21), 6 states have call successors, (21) [2022-04-06 16:31:40,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 16:31:40,845 INFO L93 Difference]: Finished difference Result 662 states and 853 transitions. [2022-04-06 16:31:40,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-04-06 16:31:40,845 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.4) internal successors, (44), 9 states have internal predecessors, (44), 7 states have call successors, (23), 7 states have call predecessors, (23), 5 states have return successors, (21), 5 states have call predecessors, (21), 6 states have call successors, (21) Word has length 133 [2022-04-06 16:31:40,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 16:31:40,847 INFO L225 Difference]: With dead ends: 662 [2022-04-06 16:31:40,847 INFO L226 Difference]: Without dead ends: 653 [2022-04-06 16:31:40,847 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 270 GetRequests, 249 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=206, Invalid=300, Unknown=0, NotChecked=0, Total=506 [2022-04-06 16:31:40,848 INFO L913 BasicCegarLoop]: 62 mSDtfsCounter, 51 mSDsluCounter, 166 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 228 SdHoareTripleChecker+Invalid, 133 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 16:31:40,848 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [51 Valid, 228 Invalid, 133 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 87 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 16:31:40,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 653 states. [2022-04-06 16:31:40,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 653 to 653. [2022-04-06 16:31:40,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 653 states, 420 states have (on average 1.2047619047619047) internal successors, (506), 426 states have internal predecessors, (506), 169 states have call successors, (169), 64 states have call predecessors, (169), 63 states have return successors, (166), 162 states have call predecessors, (166), 166 states have call successors, (166) [2022-04-06 16:31:40,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 653 states to 653 states and 841 transitions. [2022-04-06 16:31:40,915 INFO L78 Accepts]: Start accepts. Automaton has 653 states and 841 transitions. Word has length 133 [2022-04-06 16:31:40,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 16:31:40,916 INFO L478 AbstractCegarLoop]: Abstraction has 653 states and 841 transitions. [2022-04-06 16:31:40,916 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.4) internal successors, (44), 9 states have internal predecessors, (44), 7 states have call successors, (23), 7 states have call predecessors, (23), 5 states have return successors, (21), 5 states have call predecessors, (21), 6 states have call successors, (21) [2022-04-06 16:31:40,916 INFO L276 IsEmpty]: Start isEmpty. Operand 653 states and 841 transitions. [2022-04-06 16:31:40,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2022-04-06 16:31:40,917 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 16:31:40,917 INFO L499 BasicCegarLoop]: trace histogram [17, 16, 16, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 16:31:40,934 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Ended with exit code 0 [2022-04-06 16:31:41,119 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2022-04-06 16:31:41,119 INFO L403 AbstractCegarLoop]: === Iteration 37 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 16:31:41,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 16:31:41,120 INFO L85 PathProgramCache]: Analyzing trace with hash 1894865945, now seen corresponding path program 9 times [2022-04-06 16:31:41,120 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 16:31:41,120 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [873479788] [2022-04-06 16:31:41,120 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 16:31:41,120 INFO L85 PathProgramCache]: Analyzing trace with hash 1894865945, now seen corresponding path program 10 times [2022-04-06 16:31:41,120 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 16:31:41,120 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [642019931] [2022-04-06 16:31:41,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 16:31:41,120 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 16:31:41,125 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 16:31:41,125 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1111899176] [2022-04-06 16:31:41,125 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 16:31:41,125 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 16:31:41,125 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 16:31:41,126 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 16:31:41,127 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2022-04-06 16:31:41,188 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 16:31:41,188 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 16:31:41,189 INFO L263 TraceCheckSpWp]: Trace formula consists of 303 conjuncts, 67 conjunts are in the unsatisfiable core [2022-04-06 16:31:41,191 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 16:31:41,855 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-06 16:31:41,857 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-06 16:31:41,858 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-06 16:31:41,870 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-06 16:31:42,188 INFO L134 CoverageAnalysis]: Checked inductivity of 588 backedges. 133 proven. 95 refuted. 0 times theorem prover too weak. 360 trivial. 0 not checked. [2022-04-06 16:31:42,189 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 16:31:43,176 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-06 16:31:43,379 INFO L134 CoverageAnalysis]: Checked inductivity of 588 backedges. 156 proven. 12 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2022-04-06 16:31:43,379 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 16:31:43,379 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [642019931] [2022-04-06 16:31:43,379 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 16:31:43,379 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1111899176] [2022-04-06 16:31:43,379 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1111899176] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 16:31:43,380 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 16:31:43,380 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 11] total 24 [2022-04-06 16:31:43,380 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 16:31:43,380 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [873479788] [2022-04-06 16:31:43,380 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [873479788] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 16:31:43,380 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 16:31:43,380 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-04-06 16:31:43,380 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1400194073] [2022-04-06 16:31:43,380 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 16:31:43,381 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-04-06 16:31:43,381 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 16:31:43,381 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-04-06 16:31:43,381 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=469, Unknown=0, NotChecked=0, Total=552 [2022-04-06 16:31:43,381 INFO L87 Difference]: Start difference. First operand 653 states and 841 transitions. Second operand has 18 states, 15 states have (on average 2.6) internal successors, (39), 15 states have internal predecessors, (39), 11 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (21), 9 states have call predecessors, (21), 10 states have call successors, (21) [2022-04-06 16:31:46,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 16:31:46,060 INFO L93 Difference]: Finished difference Result 687 states and 892 transitions. [2022-04-06 16:31:46,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-04-06 16:31:46,061 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 15 states have (on average 2.6) internal successors, (39), 15 states have internal predecessors, (39), 11 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (21), 9 states have call predecessors, (21), 10 states have call successors, (21) Word has length 134 [2022-04-06 16:31:46,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 16:31:46,063 INFO L225 Difference]: With dead ends: 687 [2022-04-06 16:31:46,063 INFO L226 Difference]: Without dead ends: 684 [2022-04-06 16:31:46,064 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 273 GetRequests, 244 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=130, Invalid=740, Unknown=0, NotChecked=0, Total=870 [2022-04-06 16:31:46,064 INFO L913 BasicCegarLoop]: 63 mSDtfsCounter, 47 mSDsluCounter, 400 mSDsCounter, 0 mSdLazyCounter, 890 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 463 SdHoareTripleChecker+Invalid, 932 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 890 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-04-06 16:31:46,065 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [62 Valid, 463 Invalid, 932 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 890 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-04-06 16:31:46,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 684 states. [2022-04-06 16:31:46,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 684 to 679. [2022-04-06 16:31:46,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 679 states, 433 states have (on average 1.210161662817552) internal successors, (524), 439 states have internal predecessors, (524), 181 states have call successors, (181), 65 states have call predecessors, (181), 64 states have return successors, (178), 174 states have call predecessors, (178), 178 states have call successors, (178) [2022-04-06 16:31:46,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 679 states to 679 states and 883 transitions. [2022-04-06 16:31:46,158 INFO L78 Accepts]: Start accepts. Automaton has 679 states and 883 transitions. Word has length 134 [2022-04-06 16:31:46,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 16:31:46,158 INFO L478 AbstractCegarLoop]: Abstraction has 679 states and 883 transitions. [2022-04-06 16:31:46,158 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 15 states have (on average 2.6) internal successors, (39), 15 states have internal predecessors, (39), 11 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (21), 9 states have call predecessors, (21), 10 states have call successors, (21) [2022-04-06 16:31:46,158 INFO L276 IsEmpty]: Start isEmpty. Operand 679 states and 883 transitions. [2022-04-06 16:31:46,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2022-04-06 16:31:46,160 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 16:31:46,160 INFO L499 BasicCegarLoop]: trace histogram [17, 16, 16, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 16:31:46,183 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2022-04-06 16:31:46,371 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36,37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 16:31:46,371 INFO L403 AbstractCegarLoop]: === Iteration 38 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 16:31:46,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 16:31:46,372 INFO L85 PathProgramCache]: Analyzing trace with hash -736314780, now seen corresponding path program 7 times [2022-04-06 16:31:46,372 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 16:31:46,372 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1223328382] [2022-04-06 16:31:46,372 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 16:31:46,373 INFO L85 PathProgramCache]: Analyzing trace with hash -736314780, now seen corresponding path program 8 times [2022-04-06 16:31:46,373 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 16:31:46,373 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [687055360] [2022-04-06 16:31:46,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 16:31:46,373 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 16:31:46,378 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 16:31:46,379 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1925121996] [2022-04-06 16:31:46,379 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 16:31:46,379 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 16:31:46,379 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 16:31:46,380 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 16:31:46,381 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2022-04-06 16:31:46,449 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 16:31:46,450 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 16:31:46,451 INFO L263 TraceCheckSpWp]: Trace formula consists of 378 conjuncts, 19 conjunts are in the unsatisfiable core [2022-04-06 16:31:46,453 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 16:31:46,697 INFO L134 CoverageAnalysis]: Checked inductivity of 604 backedges. 40 proven. 444 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2022-04-06 16:31:46,698 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 16:31:46,986 INFO L134 CoverageAnalysis]: Checked inductivity of 604 backedges. 40 proven. 60 refuted. 0 times theorem prover too weak. 504 trivial. 0 not checked. [2022-04-06 16:31:46,986 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 16:31:46,986 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [687055360] [2022-04-06 16:31:46,986 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 16:31:46,987 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1925121996] [2022-04-06 16:31:46,987 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1925121996] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 16:31:46,987 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 16:31:46,987 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2022-04-06 16:31:46,987 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 16:31:46,987 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1223328382] [2022-04-06 16:31:46,987 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1223328382] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 16:31:46,987 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 16:31:46,987 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-04-06 16:31:46,987 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1116496723] [2022-04-06 16:31:46,987 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 16:31:46,988 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-04-06 16:31:46,988 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 16:31:46,988 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-04-06 16:31:46,988 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=222, Unknown=0, NotChecked=0, Total=380 [2022-04-06 16:31:46,988 INFO L87 Difference]: Start difference. First operand 679 states and 883 transitions. Second operand has 11 states, 11 states have (on average 4.545454545454546) internal successors, (50), 10 states have internal predecessors, (50), 7 states have call successors, (23), 7 states have call predecessors, (23), 5 states have return successors, (21), 5 states have call predecessors, (21), 6 states have call successors, (21) [2022-04-06 16:31:47,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 16:31:47,271 INFO L93 Difference]: Finished difference Result 991 states and 1310 transitions. [2022-04-06 16:31:47,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-04-06 16:31:47,272 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.545454545454546) internal successors, (50), 10 states have internal predecessors, (50), 7 states have call successors, (23), 7 states have call predecessors, (23), 5 states have return successors, (21), 5 states have call predecessors, (21), 6 states have call successors, (21) Word has length 139 [2022-04-06 16:31:47,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 16:31:47,275 INFO L225 Difference]: With dead ends: 991 [2022-04-06 16:31:47,275 INFO L226 Difference]: Without dead ends: 794 [2022-04-06 16:31:47,277 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 283 GetRequests, 259 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=266, Invalid=384, Unknown=0, NotChecked=0, Total=650 [2022-04-06 16:31:47,277 INFO L913 BasicCegarLoop]: 70 mSDtfsCounter, 78 mSDsluCounter, 211 mSDsCounter, 0 mSdLazyCounter, 126 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 281 SdHoareTripleChecker+Invalid, 187 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 126 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 16:31:47,277 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [78 Valid, 281 Invalid, 187 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 126 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 16:31:47,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 794 states. [2022-04-06 16:31:47,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 794 to 784. [2022-04-06 16:31:47,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 784 states, 504 states have (on average 1.1845238095238095) internal successors, (597), 510 states have internal predecessors, (597), 198 states have call successors, (198), 83 states have call predecessors, (198), 81 states have return successors, (194), 190 states have call predecessors, (194), 194 states have call successors, (194) [2022-04-06 16:31:47,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 784 states to 784 states and 989 transitions. [2022-04-06 16:31:47,376 INFO L78 Accepts]: Start accepts. Automaton has 784 states and 989 transitions. Word has length 139 [2022-04-06 16:31:47,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 16:31:47,377 INFO L478 AbstractCegarLoop]: Abstraction has 784 states and 989 transitions. [2022-04-06 16:31:47,377 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.545454545454546) internal successors, (50), 10 states have internal predecessors, (50), 7 states have call successors, (23), 7 states have call predecessors, (23), 5 states have return successors, (21), 5 states have call predecessors, (21), 6 states have call successors, (21) [2022-04-06 16:31:47,377 INFO L276 IsEmpty]: Start isEmpty. Operand 784 states and 989 transitions. [2022-04-06 16:31:47,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2022-04-06 16:31:47,378 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 16:31:47,378 INFO L499 BasicCegarLoop]: trace histogram [18, 17, 17, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 16:31:47,394 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Ended with exit code 0 [2022-04-06 16:31:47,583 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2022-04-06 16:31:47,583 INFO L403 AbstractCegarLoop]: === Iteration 39 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 16:31:47,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 16:31:47,584 INFO L85 PathProgramCache]: Analyzing trace with hash -915674665, now seen corresponding path program 11 times [2022-04-06 16:31:47,584 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 16:31:47,584 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1653104685] [2022-04-06 16:31:47,584 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 16:31:47,584 INFO L85 PathProgramCache]: Analyzing trace with hash -915674665, now seen corresponding path program 12 times [2022-04-06 16:31:47,584 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 16:31:47,584 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1699022913] [2022-04-06 16:31:47,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 16:31:47,584 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 16:31:47,589 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 16:31:47,589 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2061398089] [2022-04-06 16:31:47,589 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 16:31:47,589 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 16:31:47,589 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 16:31:47,590 INFO L229 MonitoredProcess]: Starting monitored process 39 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 16:31:47,591 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2022-04-06 16:31:48,136 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-04-06 16:31:48,136 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 16:31:48,139 INFO L263 TraceCheckSpWp]: Trace formula consists of 277 conjuncts, 61 conjunts are in the unsatisfiable core [2022-04-06 16:31:48,141 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 16:31:56,682 INFO L134 CoverageAnalysis]: Checked inductivity of 670 backedges. 101 proven. 93 refuted. 0 times theorem prover too weak. 476 trivial. 0 not checked. [2022-04-06 16:31:56,682 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 16:32:03,624 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 16:32:03,624 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1699022913] [2022-04-06 16:32:03,624 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 16:32:03,624 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2061398089] [2022-04-06 16:32:03,624 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2061398089] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 16:32:03,624 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-04-06 16:32:03,624 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2022-04-06 16:32:03,625 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 16:32:03,625 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1653104685] [2022-04-06 16:32:03,625 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1653104685] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 16:32:03,625 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 16:32:03,625 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-04-06 16:32:03,625 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [42776418] [2022-04-06 16:32:03,625 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 16:32:03,625 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-04-06 16:32:03,625 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 16:32:03,625 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-04-06 16:32:03,626 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=682, Unknown=2, NotChecked=0, Total=812 [2022-04-06 16:32:03,626 INFO L87 Difference]: Start difference. First operand 784 states and 989 transitions. Second operand has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 14 states have internal predecessors, (42), 7 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (18), 8 states have call predecessors, (18), 7 states have call successors, (18) [2022-04-06 16:32:15,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 16:32:15,983 INFO L93 Difference]: Finished difference Result 838 states and 1061 transitions. [2022-04-06 16:32:15,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-04-06 16:32:15,984 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 14 states have internal predecessors, (42), 7 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (18), 8 states have call predecessors, (18), 7 states have call successors, (18) Word has length 141 [2022-04-06 16:32:15,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 16:32:15,986 INFO L225 Difference]: With dead ends: 838 [2022-04-06 16:32:15,986 INFO L226 Difference]: Without dead ends: 833 [2022-04-06 16:32:15,987 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 213 GetRequests, 179 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 291 ImplicationChecksByTransitivity, 15.8s TimeCoverageRelationStatistics Valid=189, Invalid=999, Unknown=2, NotChecked=0, Total=1190 [2022-04-06 16:32:15,987 INFO L913 BasicCegarLoop]: 60 mSDtfsCounter, 66 mSDsluCounter, 354 mSDsCounter, 0 mSdLazyCounter, 825 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 414 SdHoareTripleChecker+Invalid, 879 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 825 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 16 IncrementalHoareTripleChecker+Unchecked, 8.1s IncrementalHoareTripleChecker+Time [2022-04-06 16:32:15,988 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [82 Valid, 414 Invalid, 879 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 825 Invalid, 0 Unknown, 16 Unchecked, 8.1s Time] [2022-04-06 16:32:15,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 833 states. [2022-04-06 16:32:16,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 833 to 817. [2022-04-06 16:32:16,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 817 states, 523 states have (on average 1.1892925430210326) internal successors, (622), 529 states have internal predecessors, (622), 210 states have call successors, (210), 85 states have call predecessors, (210), 83 states have return successors, (206), 202 states have call predecessors, (206), 206 states have call successors, (206) [2022-04-06 16:32:16,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 817 states to 817 states and 1038 transitions. [2022-04-06 16:32:16,106 INFO L78 Accepts]: Start accepts. Automaton has 817 states and 1038 transitions. Word has length 141 [2022-04-06 16:32:16,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 16:32:16,106 INFO L478 AbstractCegarLoop]: Abstraction has 817 states and 1038 transitions. [2022-04-06 16:32:16,106 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 14 states have internal predecessors, (42), 7 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (18), 8 states have call predecessors, (18), 7 states have call successors, (18) [2022-04-06 16:32:16,106 INFO L276 IsEmpty]: Start isEmpty. Operand 817 states and 1038 transitions. [2022-04-06 16:32:16,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2022-04-06 16:32:16,107 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 16:32:16,107 INFO L499 BasicCegarLoop]: trace histogram [19, 18, 18, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 16:32:16,114 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2022-04-06 16:32:16,312 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2022-04-06 16:32:16,313 INFO L403 AbstractCegarLoop]: === Iteration 40 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 16:32:16,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 16:32:16,313 INFO L85 PathProgramCache]: Analyzing trace with hash 2139656620, now seen corresponding path program 13 times [2022-04-06 16:32:16,313 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 16:32:16,313 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [981546257] [2022-04-06 16:32:16,313 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 16:32:16,313 INFO L85 PathProgramCache]: Analyzing trace with hash 2139656620, now seen corresponding path program 14 times [2022-04-06 16:32:16,313 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 16:32:16,313 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [382067849] [2022-04-06 16:32:16,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 16:32:16,314 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 16:32:16,318 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 16:32:16,318 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1692365130] [2022-04-06 16:32:16,318 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 16:32:16,318 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 16:32:16,318 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 16:32:16,319 INFO L229 MonitoredProcess]: Starting monitored process 40 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 16:32:16,320 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2022-04-06 16:32:16,402 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 16:32:16,402 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 16:32:16,404 INFO L263 TraceCheckSpWp]: Trace formula consists of 377 conjuncts, 68 conjunts are in the unsatisfiable core [2022-04-06 16:32:16,406 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 16:32:17,421 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-06 16:32:18,369 INFO L134 CoverageAnalysis]: Checked inductivity of 744 backedges. 112 proven. 92 refuted. 0 times theorem prover too weak. 540 trivial. 0 not checked. [2022-04-06 16:32:18,369 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 16:32:19,452 INFO L134 CoverageAnalysis]: Checked inductivity of 744 backedges. 157 proven. 37 refuted. 0 times theorem prover too weak. 550 trivial. 0 not checked. [2022-04-06 16:32:19,452 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 16:32:19,452 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [382067849] [2022-04-06 16:32:19,452 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 16:32:19,452 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1692365130] [2022-04-06 16:32:19,453 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1692365130] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 16:32:19,453 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 16:32:19,453 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 12] total 24 [2022-04-06 16:32:19,453 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 16:32:19,453 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [981546257] [2022-04-06 16:32:19,453 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [981546257] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 16:32:19,453 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 16:32:19,453 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-04-06 16:32:19,453 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1788714280] [2022-04-06 16:32:19,453 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 16:32:19,453 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-04-06 16:32:19,453 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 16:32:19,454 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-04-06 16:32:19,454 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=464, Unknown=0, NotChecked=0, Total=552 [2022-04-06 16:32:19,454 INFO L87 Difference]: Start difference. First operand 817 states and 1038 transitions. Second operand has 17 states, 16 states have (on average 2.5625) internal successors, (41), 14 states have internal predecessors, (41), 9 states have call successors, (25), 2 states have call predecessors, (25), 2 states have return successors, (23), 9 states have call predecessors, (23), 9 states have call successors, (23) [2022-04-06 16:32:20,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 16:32:20,672 INFO L93 Difference]: Finished difference Result 860 states and 1093 transitions. [2022-04-06 16:32:20,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-04-06 16:32:20,673 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 2.5625) internal successors, (41), 14 states have internal predecessors, (41), 9 states have call successors, (25), 2 states have call predecessors, (25), 2 states have return successors, (23), 9 states have call predecessors, (23), 9 states have call successors, (23) Word has length 146 [2022-04-06 16:32:20,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 16:32:20,676 INFO L225 Difference]: With dead ends: 860 [2022-04-06 16:32:20,676 INFO L226 Difference]: Without dead ends: 858 [2022-04-06 16:32:20,677 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 298 GetRequests, 268 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=150, Invalid=780, Unknown=0, NotChecked=0, Total=930 [2022-04-06 16:32:20,677 INFO L913 BasicCegarLoop]: 64 mSDtfsCounter, 44 mSDsluCounter, 434 mSDsCounter, 0 mSdLazyCounter, 936 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 498 SdHoareTripleChecker+Invalid, 972 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 936 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-04-06 16:32:20,677 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [56 Valid, 498 Invalid, 972 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 936 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-04-06 16:32:20,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 858 states. [2022-04-06 16:32:20,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 858 to 852. [2022-04-06 16:32:20,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 852 states, 542 states have (on average 1.1900369003690037) internal successors, (645), 548 states have internal predecessors, (645), 222 states have call successors, (222), 89 states have call predecessors, (222), 87 states have return successors, (218), 214 states have call predecessors, (218), 218 states have call successors, (218) [2022-04-06 16:32:20,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 852 states to 852 states and 1085 transitions. [2022-04-06 16:32:20,778 INFO L78 Accepts]: Start accepts. Automaton has 852 states and 1085 transitions. Word has length 146 [2022-04-06 16:32:20,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 16:32:20,778 INFO L478 AbstractCegarLoop]: Abstraction has 852 states and 1085 transitions. [2022-04-06 16:32:20,778 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 2.5625) internal successors, (41), 14 states have internal predecessors, (41), 9 states have call successors, (25), 2 states have call predecessors, (25), 2 states have return successors, (23), 9 states have call predecessors, (23), 9 states have call successors, (23) [2022-04-06 16:32:20,778 INFO L276 IsEmpty]: Start isEmpty. Operand 852 states and 1085 transitions. [2022-04-06 16:32:20,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2022-04-06 16:32:20,779 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 16:32:20,779 INFO L499 BasicCegarLoop]: trace histogram [20, 19, 19, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 16:32:20,798 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2022-04-06 16:32:21,003 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2022-04-06 16:32:21,003 INFO L403 AbstractCegarLoop]: === Iteration 41 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 16:32:21,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 16:32:21,003 INFO L85 PathProgramCache]: Analyzing trace with hash -1613652297, now seen corresponding path program 15 times [2022-04-06 16:32:21,003 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 16:32:21,003 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [167673857] [2022-04-06 16:32:21,004 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 16:32:21,004 INFO L85 PathProgramCache]: Analyzing trace with hash -1613652297, now seen corresponding path program 16 times [2022-04-06 16:32:21,004 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 16:32:21,004 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2068232903] [2022-04-06 16:32:21,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 16:32:21,004 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 16:32:21,008 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 16:32:21,009 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1337465257] [2022-04-06 16:32:21,009 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 16:32:21,009 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 16:32:21,009 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 16:32:21,009 INFO L229 MonitoredProcess]: Starting monitored process 41 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 16:32:21,010 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2022-04-06 16:32:21,085 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 16:32:21,085 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 16:32:21,087 INFO L263 TraceCheckSpWp]: Trace formula consists of 337 conjuncts, 89 conjunts are in the unsatisfiable core [2022-04-06 16:32:21,089 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 16:32:22,240 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-06 16:32:22,417 INFO L134 CoverageAnalysis]: Checked inductivity of 822 backedges. 188 proven. 160 refuted. 0 times theorem prover too weak. 474 trivial. 0 not checked. [2022-04-06 16:32:22,417 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 16:32:38,530 INFO L134 CoverageAnalysis]: Checked inductivity of 822 backedges. 217 proven. 103 refuted. 0 times theorem prover too weak. 502 trivial. 0 not checked. [2022-04-06 16:32:38,530 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 16:32:38,530 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2068232903] [2022-04-06 16:32:38,530 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 16:32:38,530 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1337465257] [2022-04-06 16:32:38,530 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1337465257] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 16:32:38,530 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 16:32:38,531 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17] total 28 [2022-04-06 16:32:38,531 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 16:32:38,531 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [167673857] [2022-04-06 16:32:38,531 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [167673857] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 16:32:38,531 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 16:32:38,531 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-04-06 16:32:38,531 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1048866359] [2022-04-06 16:32:38,531 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 16:32:38,531 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-04-06 16:32:38,532 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 16:32:38,532 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-04-06 16:32:38,532 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=191, Invalid=564, Unknown=1, NotChecked=0, Total=756 [2022-04-06 16:32:38,532 INFO L87 Difference]: Start difference. First operand 852 states and 1085 transitions. Second operand has 16 states, 15 states have (on average 2.7333333333333334) internal successors, (41), 14 states have internal predecessors, (41), 9 states have call successors, (26), 2 states have call predecessors, (26), 2 states have return successors, (24), 10 states have call predecessors, (24), 9 states have call successors, (24) [2022-04-06 16:32:39,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 16:32:39,580 INFO L93 Difference]: Finished difference Result 864 states and 1096 transitions. [2022-04-06 16:32:39,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-04-06 16:32:39,581 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.7333333333333334) internal successors, (41), 14 states have internal predecessors, (41), 9 states have call successors, (26), 2 states have call predecessors, (26), 2 states have return successors, (24), 10 states have call predecessors, (24), 9 states have call successors, (24) Word has length 151 [2022-04-06 16:32:39,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 16:32:39,584 INFO L225 Difference]: With dead ends: 864 [2022-04-06 16:32:39,584 INFO L226 Difference]: Without dead ends: 862 [2022-04-06 16:32:39,584 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 303 GetRequests, 272 SyntacticMatches, 3 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 226 ImplicationChecksByTransitivity, 12.5s TimeCoverageRelationStatistics Valid=204, Invalid=665, Unknown=1, NotChecked=0, Total=870 [2022-04-06 16:32:39,584 INFO L913 BasicCegarLoop]: 64 mSDtfsCounter, 44 mSDsluCounter, 334 mSDsCounter, 0 mSdLazyCounter, 795 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 398 SdHoareTripleChecker+Invalid, 861 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 795 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-04-06 16:32:39,585 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [59 Valid, 398 Invalid, 861 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 795 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-04-06 16:32:39,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 862 states. [2022-04-06 16:32:39,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 862 to 856. [2022-04-06 16:32:39,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 856 states, 545 states have (on average 1.1889908256880735) internal successors, (648), 551 states have internal predecessors, (648), 222 states have call successors, (222), 90 states have call predecessors, (222), 88 states have return successors, (218), 214 states have call predecessors, (218), 218 states have call successors, (218) [2022-04-06 16:32:39,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 856 states to 856 states and 1088 transitions. [2022-04-06 16:32:39,700 INFO L78 Accepts]: Start accepts. Automaton has 856 states and 1088 transitions. Word has length 151 [2022-04-06 16:32:39,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 16:32:39,700 INFO L478 AbstractCegarLoop]: Abstraction has 856 states and 1088 transitions. [2022-04-06 16:32:39,700 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 2.7333333333333334) internal successors, (41), 14 states have internal predecessors, (41), 9 states have call successors, (26), 2 states have call predecessors, (26), 2 states have return successors, (24), 10 states have call predecessors, (24), 9 states have call successors, (24) [2022-04-06 16:32:39,700 INFO L276 IsEmpty]: Start isEmpty. Operand 856 states and 1088 transitions. [2022-04-06 16:32:39,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2022-04-06 16:32:39,702 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 16:32:39,702 INFO L499 BasicCegarLoop]: trace histogram [20, 19, 19, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 16:32:39,720 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2022-04-06 16:32:39,915 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2022-04-06 16:32:39,915 INFO L403 AbstractCegarLoop]: === Iteration 42 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 16:32:39,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 16:32:39,915 INFO L85 PathProgramCache]: Analyzing trace with hash 40428859, now seen corresponding path program 17 times [2022-04-06 16:32:39,915 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 16:32:39,915 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [698282895] [2022-04-06 16:32:39,916 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 16:32:39,916 INFO L85 PathProgramCache]: Analyzing trace with hash 40428859, now seen corresponding path program 18 times [2022-04-06 16:32:39,916 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 16:32:39,916 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [381635597] [2022-04-06 16:32:39,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 16:32:39,916 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 16:32:39,921 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 16:32:39,921 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [454483940] [2022-04-06 16:32:39,922 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 16:32:39,922 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 16:32:39,922 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 16:32:39,922 INFO L229 MonitoredProcess]: Starting monitored process 42 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 16:32:39,923 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2022-04-06 16:32:40,395 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-04-06 16:32:40,395 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 16:32:40,398 INFO L263 TraceCheckSpWp]: Trace formula consists of 286 conjuncts, 83 conjunts are in the unsatisfiable core [2022-04-06 16:32:40,400 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 16:32:41,971 INFO L134 CoverageAnalysis]: Checked inductivity of 822 backedges. 143 proven. 148 refuted. 0 times theorem prover too weak. 531 trivial. 0 not checked. [2022-04-06 16:32:41,971 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 16:32:45,227 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 16:32:45,227 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [381635597] [2022-04-06 16:32:45,228 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 16:32:45,228 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [454483940] [2022-04-06 16:32:45,228 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [454483940] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 16:32:45,228 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-04-06 16:32:45,228 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2022-04-06 16:32:45,228 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 16:32:45,228 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [698282895] [2022-04-06 16:32:45,228 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [698282895] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 16:32:45,228 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 16:32:45,228 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-04-06 16:32:45,228 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2137013387] [2022-04-06 16:32:45,228 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 16:32:45,228 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-04-06 16:32:45,228 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 16:32:45,229 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-04-06 16:32:45,229 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=460, Unknown=0, NotChecked=0, Total=600 [2022-04-06 16:32:45,229 INFO L87 Difference]: Start difference. First operand 856 states and 1088 transitions. Second operand has 17 states, 16 states have (on average 2.5625) internal successors, (41), 14 states have internal predecessors, (41), 9 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (22), 9 states have call predecessors, (22), 8 states have call successors, (22) [2022-04-06 16:32:47,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 16:32:47,176 INFO L93 Difference]: Finished difference Result 879 states and 1115 transitions. [2022-04-06 16:32:47,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-04-06 16:32:47,177 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 2.5625) internal successors, (41), 14 states have internal predecessors, (41), 9 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (22), 9 states have call predecessors, (22), 8 states have call successors, (22) Word has length 151 [2022-04-06 16:32:47,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 16:32:47,180 INFO L225 Difference]: With dead ends: 879 [2022-04-06 16:32:47,180 INFO L226 Difference]: Without dead ends: 877 [2022-04-06 16:32:47,181 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 207 GetRequests, 176 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 213 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=215, Invalid=777, Unknown=0, NotChecked=0, Total=992 [2022-04-06 16:32:47,181 INFO L913 BasicCegarLoop]: 65 mSDtfsCounter, 48 mSDsluCounter, 395 mSDsCounter, 0 mSdLazyCounter, 789 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 460 SdHoareTripleChecker+Invalid, 822 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 789 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-04-06 16:32:47,182 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [58 Valid, 460 Invalid, 822 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 789 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-04-06 16:32:47,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 877 states. [2022-04-06 16:32:47,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 877 to 871. [2022-04-06 16:32:47,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 871 states, 554 states have (on average 1.1895306859205776) internal successors, (659), 560 states have internal predecessors, (659), 226 states have call successors, (226), 92 states have call predecessors, (226), 90 states have return successors, (222), 218 states have call predecessors, (222), 222 states have call successors, (222) [2022-04-06 16:32:47,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 871 states to 871 states and 1107 transitions. [2022-04-06 16:32:47,299 INFO L78 Accepts]: Start accepts. Automaton has 871 states and 1107 transitions. Word has length 151 [2022-04-06 16:32:47,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 16:32:47,299 INFO L478 AbstractCegarLoop]: Abstraction has 871 states and 1107 transitions. [2022-04-06 16:32:47,299 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 2.5625) internal successors, (41), 14 states have internal predecessors, (41), 9 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (22), 9 states have call predecessors, (22), 8 states have call successors, (22) [2022-04-06 16:32:47,299 INFO L276 IsEmpty]: Start isEmpty. Operand 871 states and 1107 transitions. [2022-04-06 16:32:47,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2022-04-06 16:32:47,300 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 16:32:47,301 INFO L499 BasicCegarLoop]: trace histogram [21, 20, 20, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 1, 1] [2022-04-06 16:32:47,310 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2022-04-06 16:32:47,508 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 16:32:47,508 INFO L403 AbstractCegarLoop]: === Iteration 43 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 16:32:47,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 16:32:47,509 INFO L85 PathProgramCache]: Analyzing trace with hash 1238694007, now seen corresponding path program 11 times [2022-04-06 16:32:47,509 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 16:32:47,509 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [125346166] [2022-04-06 16:32:47,509 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 16:32:47,509 INFO L85 PathProgramCache]: Analyzing trace with hash 1238694007, now seen corresponding path program 12 times [2022-04-06 16:32:47,509 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 16:32:47,510 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1224611281] [2022-04-06 16:32:47,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 16:32:47,510 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 16:32:47,517 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 16:32:47,517 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [663615290] [2022-04-06 16:32:47,518 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 16:32:47,518 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 16:32:47,518 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 16:32:47,519 INFO L229 MonitoredProcess]: Starting monitored process 43 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 16:32:47,520 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2022-04-06 16:32:47,610 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-04-06 16:32:47,610 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 16:32:47,611 INFO L263 TraceCheckSpWp]: Trace formula consists of 268 conjuncts, 48 conjunts are in the unsatisfiable core [2022-04-06 16:32:47,614 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 16:32:48,599 INFO L134 CoverageAnalysis]: Checked inductivity of 897 backedges. 89 proven. 111 refuted. 0 times theorem prover too weak. 697 trivial. 0 not checked. [2022-04-06 16:32:48,599 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 16:32:49,012 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-06 16:33:11,566 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-06 16:34:33,356 WARN L232 SmtUtils]: Spent 5.13s on a formula simplification. DAG size of input: 14 DAG size of output: 1 (called from [L1067] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2022-04-06 16:34:41,878 INFO L134 CoverageAnalysis]: Checked inductivity of 897 backedges. 113 proven. 78 refuted. 0 times theorem prover too weak. 706 trivial. 0 not checked. [2022-04-06 16:34:41,878 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 16:34:41,878 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1224611281] [2022-04-06 16:34:41,878 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 16:34:41,878 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [663615290] [2022-04-06 16:34:41,879 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [663615290] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 16:34:41,879 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 16:34:41,879 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 25 [2022-04-06 16:34:41,879 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 16:34:41,879 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [125346166] [2022-04-06 16:34:41,879 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [125346166] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 16:34:41,879 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 16:34:41,879 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-04-06 16:34:41,879 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [83167041] [2022-04-06 16:34:41,879 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 16:34:41,879 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-04-06 16:34:41,880 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 16:34:41,880 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-04-06 16:34:41,880 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=504, Unknown=0, NotChecked=0, Total=600 [2022-04-06 16:34:41,880 INFO L87 Difference]: Start difference. First operand 871 states and 1107 transitions. Second operand has 16 states, 15 states have (on average 2.2) internal successors, (33), 13 states have internal predecessors, (33), 7 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (17), 6 states have call predecessors, (17), 6 states have call successors, (17) [2022-04-06 16:34:42,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 16:34:42,946 INFO L93 Difference]: Finished difference Result 898 states and 1129 transitions. [2022-04-06 16:34:42,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-04-06 16:34:42,947 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.2) internal successors, (33), 13 states have internal predecessors, (33), 7 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (17), 6 states have call predecessors, (17), 6 states have call successors, (17) Word has length 153 [2022-04-06 16:34:42,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 16:34:42,950 INFO L225 Difference]: With dead ends: 898 [2022-04-06 16:34:42,950 INFO L226 Difference]: Without dead ends: 892 [2022-04-06 16:34:42,950 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 311 GetRequests, 281 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 186 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=153, Invalid=777, Unknown=0, NotChecked=0, Total=930 [2022-04-06 16:34:42,950 INFO L913 BasicCegarLoop]: 48 mSDtfsCounter, 46 mSDsluCounter, 349 mSDsCounter, 0 mSdLazyCounter, 699 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 397 SdHoareTripleChecker+Invalid, 728 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 699 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-04-06 16:34:42,951 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [55 Valid, 397 Invalid, 728 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 699 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-04-06 16:34:42,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 892 states. [2022-04-06 16:34:43,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 892 to 872. [2022-04-06 16:34:43,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 872 states, 560 states have (on average 1.1785714285714286) internal successors, (660), 566 states have internal predecessors, (660), 217 states have call successors, (217), 95 states have call predecessors, (217), 94 states have return successors, (214), 210 states have call predecessors, (214), 214 states have call successors, (214) [2022-04-06 16:34:43,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 872 states to 872 states and 1091 transitions. [2022-04-06 16:34:43,081 INFO L78 Accepts]: Start accepts. Automaton has 872 states and 1091 transitions. Word has length 153 [2022-04-06 16:34:43,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 16:34:43,081 INFO L478 AbstractCegarLoop]: Abstraction has 872 states and 1091 transitions. [2022-04-06 16:34:43,081 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 2.2) internal successors, (33), 13 states have internal predecessors, (33), 7 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (17), 6 states have call predecessors, (17), 6 states have call successors, (17) [2022-04-06 16:34:43,082 INFO L276 IsEmpty]: Start isEmpty. Operand 872 states and 1091 transitions. [2022-04-06 16:34:43,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2022-04-06 16:34:43,083 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 16:34:43,083 INFO L499 BasicCegarLoop]: trace histogram [21, 20, 20, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 16:34:43,101 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2022-04-06 16:34:43,299 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 16:34:43,300 INFO L403 AbstractCegarLoop]: === Iteration 44 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 16:34:43,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 16:34:43,300 INFO L85 PathProgramCache]: Analyzing trace with hash -490494897, now seen corresponding path program 9 times [2022-04-06 16:34:43,300 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 16:34:43,300 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1834208600] [2022-04-06 16:34:43,300 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 16:34:43,301 INFO L85 PathProgramCache]: Analyzing trace with hash -490494897, now seen corresponding path program 10 times [2022-04-06 16:34:43,301 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 16:34:43,301 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [977150476] [2022-04-06 16:34:43,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 16:34:43,301 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 16:34:43,306 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 16:34:43,306 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1346294728] [2022-04-06 16:34:43,306 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 16:34:43,306 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 16:34:43,306 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 16:34:43,307 INFO L229 MonitoredProcess]: Starting monitored process 44 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 16:34:43,307 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2022-04-06 16:34:43,378 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 16:34:43,378 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 16:34:43,380 INFO L263 TraceCheckSpWp]: Trace formula consists of 395 conjuncts, 19 conjunts are in the unsatisfiable core [2022-04-06 16:34:43,381 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 16:34:43,642 INFO L134 CoverageAnalysis]: Checked inductivity of 902 backedges. 40 proven. 718 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2022-04-06 16:34:43,642 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 16:34:43,912 INFO L134 CoverageAnalysis]: Checked inductivity of 902 backedges. 40 proven. 78 refuted. 0 times theorem prover too weak. 784 trivial. 0 not checked. [2022-04-06 16:34:43,912 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 16:34:43,912 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [977150476] [2022-04-06 16:34:43,912 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 16:34:43,912 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1346294728] [2022-04-06 16:34:43,912 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1346294728] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 16:34:43,912 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 16:34:43,912 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2022-04-06 16:34:43,912 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 16:34:43,912 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1834208600] [2022-04-06 16:34:43,913 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1834208600] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 16:34:43,913 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 16:34:43,913 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-04-06 16:34:43,913 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [43166940] [2022-04-06 16:34:43,913 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 16:34:43,913 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-04-06 16:34:43,913 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 16:34:43,913 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-04-06 16:34:43,913 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=222, Unknown=0, NotChecked=0, Total=380 [2022-04-06 16:34:43,913 INFO L87 Difference]: Start difference. First operand 872 states and 1091 transitions. Second operand has 11 states, 11 states have (on average 4.545454545454546) internal successors, (50), 10 states have internal predecessors, (50), 8 states have call successors, (27), 8 states have call predecessors, (27), 6 states have return successors, (25), 6 states have call predecessors, (25), 7 states have call successors, (25) [2022-04-06 16:34:44,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 16:34:44,175 INFO L93 Difference]: Finished difference Result 893 states and 1116 transitions. [2022-04-06 16:34:44,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-04-06 16:34:44,176 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.545454545454546) internal successors, (50), 10 states have internal predecessors, (50), 8 states have call successors, (27), 8 states have call predecessors, (27), 6 states have return successors, (25), 6 states have call predecessors, (25), 7 states have call successors, (25) Word has length 156 [2022-04-06 16:34:44,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 16:34:44,179 INFO L225 Difference]: With dead ends: 893 [2022-04-06 16:34:44,179 INFO L226 Difference]: Without dead ends: 884 [2022-04-06 16:34:44,179 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 317 GetRequests, 293 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=267, Invalid=383, Unknown=0, NotChecked=0, Total=650 [2022-04-06 16:34:44,180 INFO L913 BasicCegarLoop]: 66 mSDtfsCounter, 76 mSDsluCounter, 158 mSDsCounter, 0 mSdLazyCounter, 109 mSolverCounterSat, 79 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 224 SdHoareTripleChecker+Invalid, 188 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 79 IncrementalHoareTripleChecker+Valid, 109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 16:34:44,180 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [76 Valid, 224 Invalid, 188 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [79 Valid, 109 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 16:34:44,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 884 states. [2022-04-06 16:34:44,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 884 to 884. [2022-04-06 16:34:44,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 884 states, 572 states have (on average 1.1748251748251748) internal successors, (672), 578 states have internal predecessors, (672), 217 states have call successors, (217), 95 states have call predecessors, (217), 94 states have return successors, (214), 210 states have call predecessors, (214), 214 states have call successors, (214) [2022-04-06 16:34:44,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 884 states to 884 states and 1103 transitions. [2022-04-06 16:34:44,309 INFO L78 Accepts]: Start accepts. Automaton has 884 states and 1103 transitions. Word has length 156 [2022-04-06 16:34:44,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 16:34:44,309 INFO L478 AbstractCegarLoop]: Abstraction has 884 states and 1103 transitions. [2022-04-06 16:34:44,309 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.545454545454546) internal successors, (50), 10 states have internal predecessors, (50), 8 states have call successors, (27), 8 states have call predecessors, (27), 6 states have return successors, (25), 6 states have call predecessors, (25), 7 states have call successors, (25) [2022-04-06 16:34:44,309 INFO L276 IsEmpty]: Start isEmpty. Operand 884 states and 1103 transitions. [2022-04-06 16:34:44,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2022-04-06 16:34:44,310 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 16:34:44,310 INFO L499 BasicCegarLoop]: trace histogram [21, 20, 20, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 16:34:44,328 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Ended with exit code 0 [2022-04-06 16:34:44,510 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2022-04-06 16:34:44,511 INFO L403 AbstractCegarLoop]: === Iteration 45 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 16:34:44,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 16:34:44,511 INFO L85 PathProgramCache]: Analyzing trace with hash 216017621, now seen corresponding path program 13 times [2022-04-06 16:34:44,511 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 16:34:44,511 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [779098445] [2022-04-06 16:34:44,512 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 16:34:44,512 INFO L85 PathProgramCache]: Analyzing trace with hash 216017621, now seen corresponding path program 14 times [2022-04-06 16:34:44,512 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 16:34:44,512 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [763032797] [2022-04-06 16:34:44,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 16:34:44,512 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 16:34:44,516 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 16:34:44,516 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [464072230] [2022-04-06 16:34:44,516 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 16:34:44,516 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 16:34:44,517 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 16:34:44,517 INFO L229 MonitoredProcess]: Starting monitored process 45 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 16:34:44,518 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2022-04-06 16:34:44,585 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 16:34:44,585 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 16:34:44,588 INFO L263 TraceCheckSpWp]: Trace formula consists of 397 conjuncts, 93 conjunts are in the unsatisfiable core [2022-04-06 16:34:44,590 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 16:34:45,209 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-06 16:34:45,210 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-06 16:34:47,600 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-06 16:34:47,655 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-06 16:34:51,625 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-06 16:34:52,278 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-06 16:34:53,127 INFO L134 CoverageAnalysis]: Checked inductivity of 904 backedges. 214 proven. 158 refuted. 0 times theorem prover too weak. 532 trivial. 0 not checked. [2022-04-06 16:34:53,127 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 16:34:59,291 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-06 16:34:59,601 INFO L134 CoverageAnalysis]: Checked inductivity of 904 backedges. 251 proven. 4 refuted. 0 times theorem prover too weak. 649 trivial. 0 not checked. [2022-04-06 16:34:59,601 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 16:34:59,601 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [763032797] [2022-04-06 16:34:59,601 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 16:34:59,601 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [464072230] [2022-04-06 16:34:59,602 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [464072230] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 16:34:59,602 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 16:34:59,602 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 12] total 26 [2022-04-06 16:34:59,602 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 16:34:59,602 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [779098445] [2022-04-06 16:34:59,602 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [779098445] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 16:34:59,602 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 16:34:59,602 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-04-06 16:34:59,602 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2060041266] [2022-04-06 16:34:59,602 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 16:34:59,602 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-04-06 16:34:59,602 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 16:34:59,603 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-04-06 16:34:59,603 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=551, Unknown=0, NotChecked=0, Total=650 [2022-04-06 16:34:59,603 INFO L87 Difference]: Start difference. First operand 884 states and 1103 transitions. Second operand has 19 states, 16 states have (on average 2.625) internal successors, (42), 16 states have internal predecessors, (42), 11 states have call successors, (27), 2 states have call predecessors, (27), 2 states have return successors, (25), 9 states have call predecessors, (25), 10 states have call successors, (25) [2022-04-06 16:35:00,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 16:35:00,875 INFO L93 Difference]: Finished difference Result 894 states and 1114 transitions. [2022-04-06 16:35:00,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-04-06 16:35:00,875 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 16 states have (on average 2.625) internal successors, (42), 16 states have internal predecessors, (42), 11 states have call successors, (27), 2 states have call predecessors, (27), 2 states have return successors, (25), 9 states have call predecessors, (25), 10 states have call successors, (25) Word has length 157 [2022-04-06 16:35:00,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 16:35:00,878 INFO L225 Difference]: With dead ends: 894 [2022-04-06 16:35:00,878 INFO L226 Difference]: Without dead ends: 892 [2022-04-06 16:35:00,879 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 316 GetRequests, 288 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 161 ImplicationChecksByTransitivity, 10.1s TimeCoverageRelationStatistics Valid=122, Invalid=690, Unknown=0, NotChecked=0, Total=812 [2022-04-06 16:35:00,879 INFO L913 BasicCegarLoop]: 64 mSDtfsCounter, 38 mSDsluCounter, 484 mSDsCounter, 0 mSdLazyCounter, 854 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 548 SdHoareTripleChecker+Invalid, 1191 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 854 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 290 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-04-06 16:35:00,879 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [51 Valid, 548 Invalid, 1191 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 854 Invalid, 0 Unknown, 290 Unchecked, 1.0s Time] [2022-04-06 16:35:00,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 892 states. [2022-04-06 16:35:01,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 892 to 890. [2022-04-06 16:35:01,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 890 states, 576 states have (on average 1.1753472222222223) internal successors, (677), 583 states have internal predecessors, (677), 218 states have call successors, (218), 96 states have call predecessors, (218), 95 states have return successors, (215), 210 states have call predecessors, (215), 215 states have call successors, (215) [2022-04-06 16:35:01,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 890 states to 890 states and 1110 transitions. [2022-04-06 16:35:01,006 INFO L78 Accepts]: Start accepts. Automaton has 890 states and 1110 transitions. Word has length 157 [2022-04-06 16:35:01,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 16:35:01,006 INFO L478 AbstractCegarLoop]: Abstraction has 890 states and 1110 transitions. [2022-04-06 16:35:01,006 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 16 states have (on average 2.625) internal successors, (42), 16 states have internal predecessors, (42), 11 states have call successors, (27), 2 states have call predecessors, (27), 2 states have return successors, (25), 9 states have call predecessors, (25), 10 states have call successors, (25) [2022-04-06 16:35:01,006 INFO L276 IsEmpty]: Start isEmpty. Operand 890 states and 1110 transitions. [2022-04-06 16:35:01,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2022-04-06 16:35:01,007 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 16:35:01,007 INFO L499 BasicCegarLoop]: trace histogram [21, 20, 20, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 16:35:01,024 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Ended with exit code 0 [2022-04-06 16:35:01,221 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2022-04-06 16:35:01,222 INFO L403 AbstractCegarLoop]: === Iteration 46 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 16:35:01,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 16:35:01,222 INFO L85 PathProgramCache]: Analyzing trace with hash 488734297, now seen corresponding path program 15 times [2022-04-06 16:35:01,222 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 16:35:01,222 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [179289406] [2022-04-06 16:35:01,222 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 16:35:01,222 INFO L85 PathProgramCache]: Analyzing trace with hash 488734297, now seen corresponding path program 16 times [2022-04-06 16:35:01,222 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 16:35:01,223 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1237313962] [2022-04-06 16:35:01,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 16:35:01,223 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 16:35:01,227 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 16:35:01,227 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [839610903] [2022-04-06 16:35:01,227 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 16:35:01,227 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 16:35:01,227 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 16:35:01,235 INFO L229 MonitoredProcess]: Starting monitored process 46 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 16:35:01,236 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2022-04-06 16:35:01,301 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 16:35:01,302 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 16:35:01,303 INFO L263 TraceCheckSpWp]: Trace formula consists of 348 conjuncts, 98 conjunts are in the unsatisfiable core [2022-04-06 16:35:01,305 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 16:35:05,870 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-06 16:35:05,872 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-06 16:35:05,873 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-06 16:35:06,377 INFO L134 CoverageAnalysis]: Checked inductivity of 904 backedges. 208 proven. 173 refuted. 0 times theorem prover too weak. 523 trivial. 0 not checked. [2022-04-06 16:35:06,377 INFO L328 TraceCheckSpWp]: Computing backward predicates...